2 * Copyright © 2008 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Keith Packard <keithp@keithp.com>
28 #include <linux/i2c.h>
29 #include <linux/slab.h>
30 #include <linux/export.h>
31 #include <linux/notifier.h>
32 #include <linux/reboot.h>
34 #include <drm/drm_atomic_helper.h>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_crtc_helper.h>
37 #include <drm/drm_edid.h>
38 #include "intel_drv.h"
39 #include <drm/i915_drm.h>
42 #define DP_LINK_CHECK_TIMEOUT (10 * 1000)
44 /* Compliance test status bits */
45 #define INTEL_DP_RESOLUTION_SHIFT_MASK 0
46 #define INTEL_DP_RESOLUTION_PREFERRED (1 << INTEL_DP_RESOLUTION_SHIFT_MASK)
47 #define INTEL_DP_RESOLUTION_STANDARD (2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
48 #define INTEL_DP_RESOLUTION_FAILSAFE (3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
55 static const struct dp_link_dpll gen4_dpll[] = {
57 { .p1 = 2, .p2 = 10, .n = 2, .m1 = 23, .m2 = 8 } },
59 { .p1 = 1, .p2 = 10, .n = 1, .m1 = 14, .m2 = 2 } }
62 static const struct dp_link_dpll pch_dpll[] = {
64 { .p1 = 2, .p2 = 10, .n = 1, .m1 = 12, .m2 = 9 } },
66 { .p1 = 1, .p2 = 10, .n = 2, .m1 = 14, .m2 = 8 } }
69 static const struct dp_link_dpll vlv_dpll[] = {
71 { .p1 = 3, .p2 = 2, .n = 5, .m1 = 3, .m2 = 81 } },
73 { .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27 } }
77 * CHV supports eDP 1.4 that have more link rates.
78 * Below only provides the fixed rate but exclude variable rate.
80 static const struct dp_link_dpll chv_dpll[] = {
82 * CHV requires to program fractional division for m2.
83 * m2 is stored in fixed point format using formula below
84 * (m2_int << 22) | m2_fraction
86 { 162000, /* m2_int = 32, m2_fraction = 1677722 */
87 { .p1 = 4, .p2 = 2, .n = 1, .m1 = 2, .m2 = 0x819999a } },
88 { 270000, /* m2_int = 27, m2_fraction = 0 */
89 { .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
90 { 540000, /* m2_int = 27, m2_fraction = 0 */
91 { .p1 = 2, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } }
94 static const int bxt_rates[] = { 162000, 216000, 243000, 270000,
95 324000, 432000, 540000 };
96 static const int skl_rates[] = { 162000, 216000, 270000,
97 324000, 432000, 540000 };
98 static const int default_rates[] = { 162000, 270000, 540000 };
101 * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
102 * @intel_dp: DP struct
104 * If a CPU or PCH DP output is attached to an eDP panel, this function
105 * will return true, and false otherwise.
107 static bool is_edp(struct intel_dp *intel_dp)
109 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
111 return intel_dig_port->base.type == INTEL_OUTPUT_EDP;
114 static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp)
116 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
118 return intel_dig_port->base.base.dev;
121 static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
123 return enc_to_intel_dp(&intel_attached_encoder(connector)->base);
126 static void intel_dp_link_down(struct intel_dp *intel_dp);
127 static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
128 static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
129 static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp);
130 static void vlv_steal_power_sequencer(struct drm_device *dev,
132 static void intel_dp_unset_edid(struct intel_dp *intel_dp);
135 intel_dp_max_link_bw(struct intel_dp *intel_dp)
137 int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
139 switch (max_link_bw) {
140 case DP_LINK_BW_1_62:
145 WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
147 max_link_bw = DP_LINK_BW_1_62;
153 static u8 intel_dp_max_lane_count(struct intel_dp *intel_dp)
155 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
156 u8 source_max, sink_max;
158 source_max = intel_dig_port->max_lanes;
159 sink_max = intel_dp->max_sink_lane_count;
161 return min(source_max, sink_max);
165 intel_dp_link_required(int pixel_clock, int bpp)
167 /* pixel_clock is in kHz, divide bpp by 8 for bit to Byte conversion */
168 return DIV_ROUND_UP(pixel_clock * bpp, 8);
172 intel_dp_max_data_rate(int max_link_clock, int max_lanes)
174 /* max_link_clock is the link symbol clock (LS_Clk) in kHz and not the
175 * link rate that is generally expressed in Gbps. Since, 8 bits of data
176 * is transmitted every LS_Clk per lane, there is no need to account for
177 * the channel encoding that is done in the PHY layer here.
180 return max_link_clock * max_lanes;
184 intel_dp_downstream_max_dotclock(struct intel_dp *intel_dp)
186 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
187 struct intel_encoder *encoder = &intel_dig_port->base;
188 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
189 int max_dotclk = dev_priv->max_dotclk_freq;
192 int type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
194 if (type != DP_DS_PORT_TYPE_VGA)
197 ds_max_dotclk = drm_dp_downstream_max_clock(intel_dp->dpcd,
198 intel_dp->downstream_ports);
200 if (ds_max_dotclk != 0)
201 max_dotclk = min(max_dotclk, ds_max_dotclk);
207 intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
209 if (intel_dp->num_sink_rates) {
210 *sink_rates = intel_dp->sink_rates;
211 return intel_dp->num_sink_rates;
214 *sink_rates = default_rates;
216 return (intel_dp->max_sink_link_bw >> 3) + 1;
220 intel_dp_source_rates(struct intel_dp *intel_dp, const int **source_rates)
222 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
223 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
226 if (IS_GEN9_LP(dev_priv)) {
227 *source_rates = bxt_rates;
228 size = ARRAY_SIZE(bxt_rates);
229 } else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
230 *source_rates = skl_rates;
231 size = ARRAY_SIZE(skl_rates);
233 *source_rates = default_rates;
234 size = ARRAY_SIZE(default_rates);
237 /* This depends on the fact that 5.4 is last value in the array */
238 if (!intel_dp_source_supports_hbr2(intel_dp))
244 static int intersect_rates(const int *source_rates, int source_len,
245 const int *sink_rates, int sink_len,
248 int i = 0, j = 0, k = 0;
250 while (i < source_len && j < sink_len) {
251 if (source_rates[i] == sink_rates[j]) {
252 if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
254 common_rates[k] = source_rates[i];
258 } else if (source_rates[i] < sink_rates[j]) {
267 static int intel_dp_common_rates(struct intel_dp *intel_dp,
270 const int *source_rates, *sink_rates;
271 int source_len, sink_len;
273 sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
274 source_len = intel_dp_source_rates(intel_dp, &source_rates);
276 return intersect_rates(source_rates, source_len,
277 sink_rates, sink_len,
281 static int intel_dp_link_rate_index(struct intel_dp *intel_dp,
282 int *common_rates, int link_rate)
287 common_len = intel_dp_common_rates(intel_dp, common_rates);
288 for (index = 0; index < common_len; index++) {
289 if (link_rate == common_rates[common_len - index - 1])
290 return common_len - index - 1;
296 int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
297 int link_rate, uint8_t lane_count)
299 int common_rates[DP_MAX_SUPPORTED_RATES];
302 link_rate_index = intel_dp_link_rate_index(intel_dp,
305 if (link_rate_index > 0) {
306 intel_dp->max_sink_link_bw = drm_dp_link_rate_to_bw_code(common_rates[link_rate_index - 1]);
307 intel_dp->max_sink_lane_count = lane_count;
308 } else if (lane_count > 1) {
309 intel_dp->max_sink_link_bw = intel_dp_max_link_bw(intel_dp);
310 intel_dp->max_sink_lane_count = lane_count >> 1;
312 DRM_ERROR("Link Training Unsuccessful\n");
319 static enum drm_mode_status
320 intel_dp_mode_valid(struct drm_connector *connector,
321 struct drm_display_mode *mode)
323 struct intel_dp *intel_dp = intel_attached_dp(connector);
324 struct intel_connector *intel_connector = to_intel_connector(connector);
325 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
326 int target_clock = mode->clock;
327 int max_rate, mode_rate, max_lanes, max_link_clock;
330 max_dotclk = intel_dp_downstream_max_dotclock(intel_dp);
332 if (is_edp(intel_dp) && fixed_mode) {
333 if (mode->hdisplay > fixed_mode->hdisplay)
336 if (mode->vdisplay > fixed_mode->vdisplay)
339 target_clock = fixed_mode->clock;
342 max_link_clock = intel_dp_max_link_rate(intel_dp);
343 max_lanes = intel_dp_max_lane_count(intel_dp);
345 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
346 mode_rate = intel_dp_link_required(target_clock, 18);
348 if (mode_rate > max_rate || target_clock > max_dotclk)
349 return MODE_CLOCK_HIGH;
351 if (mode->clock < 10000)
352 return MODE_CLOCK_LOW;
354 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
355 return MODE_H_ILLEGAL;
360 uint32_t intel_dp_pack_aux(const uint8_t *src, int src_bytes)
367 for (i = 0; i < src_bytes; i++)
368 v |= ((uint32_t) src[i]) << ((3-i) * 8);
372 static void intel_dp_unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
377 for (i = 0; i < dst_bytes; i++)
378 dst[i] = src >> ((3-i) * 8);
382 intel_dp_init_panel_power_sequencer(struct drm_device *dev,
383 struct intel_dp *intel_dp);
385 intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
386 struct intel_dp *intel_dp,
387 bool force_disable_vdd);
389 intel_dp_pps_init(struct drm_device *dev, struct intel_dp *intel_dp);
391 static void pps_lock(struct intel_dp *intel_dp)
393 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
394 struct intel_encoder *encoder = &intel_dig_port->base;
395 struct drm_device *dev = encoder->base.dev;
396 struct drm_i915_private *dev_priv = to_i915(dev);
397 enum intel_display_power_domain power_domain;
400 * See vlv_power_sequencer_reset() why we need
401 * a power domain reference here.
403 power_domain = intel_display_port_aux_power_domain(encoder);
404 intel_display_power_get(dev_priv, power_domain);
406 mutex_lock(&dev_priv->pps_mutex);
409 static void pps_unlock(struct intel_dp *intel_dp)
411 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
412 struct intel_encoder *encoder = &intel_dig_port->base;
413 struct drm_device *dev = encoder->base.dev;
414 struct drm_i915_private *dev_priv = to_i915(dev);
415 enum intel_display_power_domain power_domain;
417 mutex_unlock(&dev_priv->pps_mutex);
419 power_domain = intel_display_port_aux_power_domain(encoder);
420 intel_display_power_put(dev_priv, power_domain);
424 vlv_power_sequencer_kick(struct intel_dp *intel_dp)
426 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
427 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
428 enum pipe pipe = intel_dp->pps_pipe;
429 bool pll_enabled, release_cl_override = false;
430 enum dpio_phy phy = DPIO_PHY(pipe);
431 enum dpio_channel ch = vlv_pipe_to_channel(pipe);
434 if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN,
435 "skipping pipe %c power seqeuncer kick due to port %c being active\n",
436 pipe_name(pipe), port_name(intel_dig_port->port)))
439 DRM_DEBUG_KMS("kicking pipe %c power sequencer for port %c\n",
440 pipe_name(pipe), port_name(intel_dig_port->port));
442 /* Preserve the BIOS-computed detected bit. This is
443 * supposed to be read-only.
445 DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
446 DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
447 DP |= DP_PORT_WIDTH(1);
448 DP |= DP_LINK_TRAIN_PAT_1;
450 if (IS_CHERRYVIEW(dev_priv))
451 DP |= DP_PIPE_SELECT_CHV(pipe);
452 else if (pipe == PIPE_B)
453 DP |= DP_PIPEB_SELECT;
455 pll_enabled = I915_READ(DPLL(pipe)) & DPLL_VCO_ENABLE;
458 * The DPLL for the pipe must be enabled for this to work.
459 * So enable temporarily it if it's not already enabled.
462 release_cl_override = IS_CHERRYVIEW(dev_priv) &&
463 !chv_phy_powergate_ch(dev_priv, phy, ch, true);
465 if (vlv_force_pll_on(dev_priv, pipe, IS_CHERRYVIEW(dev_priv) ?
466 &chv_dpll[0].dpll : &vlv_dpll[0].dpll)) {
467 DRM_ERROR("Failed to force on pll for pipe %c!\n",
474 * Similar magic as in intel_dp_enable_port().
475 * We _must_ do this port enable + disable trick
476 * to make this power seqeuencer lock onto the port.
477 * Otherwise even VDD force bit won't work.
479 I915_WRITE(intel_dp->output_reg, DP);
480 POSTING_READ(intel_dp->output_reg);
482 I915_WRITE(intel_dp->output_reg, DP | DP_PORT_EN);
483 POSTING_READ(intel_dp->output_reg);
485 I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
486 POSTING_READ(intel_dp->output_reg);
489 vlv_force_pll_off(dev_priv, pipe);
491 if (release_cl_override)
492 chv_phy_powergate_ch(dev_priv, phy, ch, false);
496 static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
498 struct intel_encoder *encoder;
499 unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
502 * We don't have power sequencer currently.
503 * Pick one that's not used by other ports.
505 for_each_intel_encoder(&dev_priv->drm, encoder) {
506 struct intel_dp *intel_dp;
508 if (encoder->type != INTEL_OUTPUT_DP &&
509 encoder->type != INTEL_OUTPUT_EDP)
512 intel_dp = enc_to_intel_dp(&encoder->base);
514 if (encoder->type == INTEL_OUTPUT_EDP) {
515 WARN_ON(intel_dp->active_pipe != INVALID_PIPE &&
516 intel_dp->active_pipe != intel_dp->pps_pipe);
518 if (intel_dp->pps_pipe != INVALID_PIPE)
519 pipes &= ~(1 << intel_dp->pps_pipe);
521 WARN_ON(intel_dp->pps_pipe != INVALID_PIPE);
523 if (intel_dp->active_pipe != INVALID_PIPE)
524 pipes &= ~(1 << intel_dp->active_pipe);
531 return ffs(pipes) - 1;
535 vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
537 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
538 struct drm_device *dev = intel_dig_port->base.base.dev;
539 struct drm_i915_private *dev_priv = to_i915(dev);
542 lockdep_assert_held(&dev_priv->pps_mutex);
544 /* We should never land here with regular DP ports */
545 WARN_ON(!is_edp(intel_dp));
547 WARN_ON(intel_dp->active_pipe != INVALID_PIPE &&
548 intel_dp->active_pipe != intel_dp->pps_pipe);
550 if (intel_dp->pps_pipe != INVALID_PIPE)
551 return intel_dp->pps_pipe;
553 pipe = vlv_find_free_pps(dev_priv);
556 * Didn't find one. This should not happen since there
557 * are two power sequencers and up to two eDP ports.
559 if (WARN_ON(pipe == INVALID_PIPE))
562 vlv_steal_power_sequencer(dev, pipe);
563 intel_dp->pps_pipe = pipe;
565 DRM_DEBUG_KMS("picked pipe %c power sequencer for port %c\n",
566 pipe_name(intel_dp->pps_pipe),
567 port_name(intel_dig_port->port));
569 /* init power sequencer on this pipe and port */
570 intel_dp_init_panel_power_sequencer(dev, intel_dp);
571 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, true);
574 * Even vdd force doesn't work until we've made
575 * the power sequencer lock in on the port.
577 vlv_power_sequencer_kick(intel_dp);
579 return intel_dp->pps_pipe;
583 bxt_power_sequencer_idx(struct intel_dp *intel_dp)
585 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
586 struct drm_device *dev = intel_dig_port->base.base.dev;
587 struct drm_i915_private *dev_priv = to_i915(dev);
589 lockdep_assert_held(&dev_priv->pps_mutex);
591 /* We should never land here with regular DP ports */
592 WARN_ON(!is_edp(intel_dp));
595 * TODO: BXT has 2 PPS instances. The correct port->PPS instance
596 * mapping needs to be retrieved from VBT, for now just hard-code to
597 * use instance #0 always.
599 if (!intel_dp->pps_reset)
602 intel_dp->pps_reset = false;
605 * Only the HW needs to be reprogrammed, the SW state is fixed and
606 * has been setup during connector init.
608 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, false);
613 typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
616 static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
619 return I915_READ(PP_STATUS(pipe)) & PP_ON;
622 static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
625 return I915_READ(PP_CONTROL(pipe)) & EDP_FORCE_VDD;
628 static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
635 vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
637 vlv_pipe_check pipe_check)
641 for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
642 u32 port_sel = I915_READ(PP_ON_DELAYS(pipe)) &
643 PANEL_PORT_SELECT_MASK;
645 if (port_sel != PANEL_PORT_SELECT_VLV(port))
648 if (!pipe_check(dev_priv, pipe))
658 vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
660 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
661 struct drm_device *dev = intel_dig_port->base.base.dev;
662 struct drm_i915_private *dev_priv = to_i915(dev);
663 enum port port = intel_dig_port->port;
665 lockdep_assert_held(&dev_priv->pps_mutex);
667 /* try to find a pipe with this port selected */
668 /* first pick one where the panel is on */
669 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
671 /* didn't find one? pick one where vdd is on */
672 if (intel_dp->pps_pipe == INVALID_PIPE)
673 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
674 vlv_pipe_has_vdd_on);
675 /* didn't find one? pick one with just the correct port */
676 if (intel_dp->pps_pipe == INVALID_PIPE)
677 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
680 /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
681 if (intel_dp->pps_pipe == INVALID_PIPE) {
682 DRM_DEBUG_KMS("no initial power sequencer for port %c\n",
687 DRM_DEBUG_KMS("initial power sequencer for port %c: pipe %c\n",
688 port_name(port), pipe_name(intel_dp->pps_pipe));
690 intel_dp_init_panel_power_sequencer(dev, intel_dp);
691 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, false);
694 void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
696 struct drm_device *dev = &dev_priv->drm;
697 struct intel_encoder *encoder;
699 if (WARN_ON(!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
700 !IS_GEN9_LP(dev_priv)))
704 * We can't grab pps_mutex here due to deadlock with power_domain
705 * mutex when power_domain functions are called while holding pps_mutex.
706 * That also means that in order to use pps_pipe the code needs to
707 * hold both a power domain reference and pps_mutex, and the power domain
708 * reference get/put must be done while _not_ holding pps_mutex.
709 * pps_{lock,unlock}() do these steps in the correct order, so one
710 * should use them always.
713 for_each_intel_encoder(dev, encoder) {
714 struct intel_dp *intel_dp;
716 if (encoder->type != INTEL_OUTPUT_DP &&
717 encoder->type != INTEL_OUTPUT_EDP)
720 intel_dp = enc_to_intel_dp(&encoder->base);
722 WARN_ON(intel_dp->active_pipe != INVALID_PIPE);
724 if (encoder->type != INTEL_OUTPUT_EDP)
727 if (IS_GEN9_LP(dev_priv))
728 intel_dp->pps_reset = true;
730 intel_dp->pps_pipe = INVALID_PIPE;
734 struct pps_registers {
742 static void intel_pps_get_registers(struct drm_i915_private *dev_priv,
743 struct intel_dp *intel_dp,
744 struct pps_registers *regs)
748 memset(regs, 0, sizeof(*regs));
750 if (IS_GEN9_LP(dev_priv))
751 pps_idx = bxt_power_sequencer_idx(intel_dp);
752 else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
753 pps_idx = vlv_power_sequencer_pipe(intel_dp);
755 regs->pp_ctrl = PP_CONTROL(pps_idx);
756 regs->pp_stat = PP_STATUS(pps_idx);
757 regs->pp_on = PP_ON_DELAYS(pps_idx);
758 regs->pp_off = PP_OFF_DELAYS(pps_idx);
759 if (!IS_GEN9_LP(dev_priv))
760 regs->pp_div = PP_DIVISOR(pps_idx);
764 _pp_ctrl_reg(struct intel_dp *intel_dp)
766 struct pps_registers regs;
768 intel_pps_get_registers(to_i915(intel_dp_to_dev(intel_dp)), intel_dp,
775 _pp_stat_reg(struct intel_dp *intel_dp)
777 struct pps_registers regs;
779 intel_pps_get_registers(to_i915(intel_dp_to_dev(intel_dp)), intel_dp,
785 /* Reboot notifier handler to shutdown panel power to guarantee T12 timing
786 This function only applicable when panel PM state is not to be tracked */
787 static int edp_notify_handler(struct notifier_block *this, unsigned long code,
790 struct intel_dp *intel_dp = container_of(this, typeof(* intel_dp),
792 struct drm_device *dev = intel_dp_to_dev(intel_dp);
793 struct drm_i915_private *dev_priv = to_i915(dev);
795 if (!is_edp(intel_dp) || code != SYS_RESTART)
800 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
801 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
802 i915_reg_t pp_ctrl_reg, pp_div_reg;
805 pp_ctrl_reg = PP_CONTROL(pipe);
806 pp_div_reg = PP_DIVISOR(pipe);
807 pp_div = I915_READ(pp_div_reg);
808 pp_div &= PP_REFERENCE_DIVIDER_MASK;
810 /* 0x1F write to PP_DIV_REG sets max cycle delay */
811 I915_WRITE(pp_div_reg, pp_div | 0x1F);
812 I915_WRITE(pp_ctrl_reg, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
813 msleep(intel_dp->panel_power_cycle_delay);
816 pps_unlock(intel_dp);
821 static bool edp_have_panel_power(struct intel_dp *intel_dp)
823 struct drm_device *dev = intel_dp_to_dev(intel_dp);
824 struct drm_i915_private *dev_priv = to_i915(dev);
826 lockdep_assert_held(&dev_priv->pps_mutex);
828 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
829 intel_dp->pps_pipe == INVALID_PIPE)
832 return (I915_READ(_pp_stat_reg(intel_dp)) & PP_ON) != 0;
835 static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
837 struct drm_device *dev = intel_dp_to_dev(intel_dp);
838 struct drm_i915_private *dev_priv = to_i915(dev);
840 lockdep_assert_held(&dev_priv->pps_mutex);
842 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
843 intel_dp->pps_pipe == INVALID_PIPE)
846 return I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
850 intel_dp_check_edp(struct intel_dp *intel_dp)
852 struct drm_device *dev = intel_dp_to_dev(intel_dp);
853 struct drm_i915_private *dev_priv = to_i915(dev);
855 if (!is_edp(intel_dp))
858 if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
859 WARN(1, "eDP powered off while attempting aux channel communication.\n");
860 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
861 I915_READ(_pp_stat_reg(intel_dp)),
862 I915_READ(_pp_ctrl_reg(intel_dp)));
867 intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq)
869 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
870 struct drm_device *dev = intel_dig_port->base.base.dev;
871 struct drm_i915_private *dev_priv = to_i915(dev);
872 i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg;
876 #define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
878 done = wait_event_timeout(dev_priv->gmbus_wait_queue, C,
879 msecs_to_jiffies_timeout(10));
881 done = wait_for(C, 10) == 0;
883 DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n",
890 static uint32_t g4x_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
892 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
893 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
899 * The clock divider is based off the hrawclk, and would like to run at
900 * 2MHz. So, take the hrawclk value and divide by 2000 and use that
902 return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
905 static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
907 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
908 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
914 * The clock divider is based off the cdclk or PCH rawclk, and would
915 * like to run at 2MHz. So, take the cdclk or PCH rawclk value and
916 * divide by 2000 and use that
918 if (intel_dig_port->port == PORT_A)
919 return DIV_ROUND_CLOSEST(dev_priv->cdclk_freq, 2000);
921 return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
924 static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
926 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
927 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
929 if (intel_dig_port->port != PORT_A && HAS_PCH_LPT_H(dev_priv)) {
930 /* Workaround for non-ULT HSW */
938 return ilk_get_aux_clock_divider(intel_dp, index);
941 static uint32_t skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
944 * SKL doesn't need us to program the AUX clock divider (Hardware will
945 * derive the clock from CDCLK automatically). We still implement the
946 * get_aux_clock_divider vfunc to plug-in into the existing code.
948 return index ? 0 : 1;
951 static uint32_t g4x_get_aux_send_ctl(struct intel_dp *intel_dp,
954 uint32_t aux_clock_divider)
956 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
957 struct drm_i915_private *dev_priv =
958 to_i915(intel_dig_port->base.base.dev);
959 uint32_t precharge, timeout;
961 if (IS_GEN6(dev_priv))
966 if (IS_BROADWELL(dev_priv) && intel_dig_port->port == PORT_A)
967 timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
969 timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
971 return DP_AUX_CH_CTL_SEND_BUSY |
973 (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
974 DP_AUX_CH_CTL_TIME_OUT_ERROR |
976 DP_AUX_CH_CTL_RECEIVE_ERROR |
977 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
978 (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
979 (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT);
982 static uint32_t skl_get_aux_send_ctl(struct intel_dp *intel_dp,
987 return DP_AUX_CH_CTL_SEND_BUSY |
989 (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
990 DP_AUX_CH_CTL_TIME_OUT_ERROR |
991 DP_AUX_CH_CTL_TIME_OUT_1600us |
992 DP_AUX_CH_CTL_RECEIVE_ERROR |
993 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
994 DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
995 DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
999 intel_dp_aux_ch(struct intel_dp *intel_dp,
1000 const uint8_t *send, int send_bytes,
1001 uint8_t *recv, int recv_size)
1003 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1004 struct drm_i915_private *dev_priv =
1005 to_i915(intel_dig_port->base.base.dev);
1006 i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg;
1007 uint32_t aux_clock_divider;
1008 int i, ret, recv_bytes;
1011 bool has_aux_irq = HAS_AUX_IRQ(dev_priv);
1017 * We will be called with VDD already enabled for dpcd/edid/oui reads.
1018 * In such cases we want to leave VDD enabled and it's up to upper layers
1019 * to turn it off. But for eg. i2c-dev access we need to turn it on/off
1022 vdd = edp_panel_vdd_on(intel_dp);
1024 /* dp aux is extremely sensitive to irq latency, hence request the
1025 * lowest possible wakeup latency and so prevent the cpu from going into
1026 * deep sleep states.
1028 pm_qos_update_request(&dev_priv->pm_qos, 0);
1030 intel_dp_check_edp(intel_dp);
1032 /* Try to wait for any previous AUX channel activity */
1033 for (try = 0; try < 3; try++) {
1034 status = I915_READ_NOTRACE(ch_ctl);
1035 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
1041 static u32 last_status = -1;
1042 const u32 status = I915_READ(ch_ctl);
1044 if (status != last_status) {
1045 WARN(1, "dp_aux_ch not started status 0x%08x\n",
1047 last_status = status;
1054 /* Only 5 data registers! */
1055 if (WARN_ON(send_bytes > 20 || recv_size > 20)) {
1060 while ((aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, clock++))) {
1061 u32 send_ctl = intel_dp->get_aux_send_ctl(intel_dp,
1066 /* Must try at least 3 times according to DP spec */
1067 for (try = 0; try < 5; try++) {
1068 /* Load the send data into the aux channel data registers */
1069 for (i = 0; i < send_bytes; i += 4)
1070 I915_WRITE(intel_dp->aux_ch_data_reg[i >> 2],
1071 intel_dp_pack_aux(send + i,
1074 /* Send the command and wait for it to complete */
1075 I915_WRITE(ch_ctl, send_ctl);
1077 status = intel_dp_aux_wait_done(intel_dp, has_aux_irq);
1079 /* Clear done status and any errors */
1082 DP_AUX_CH_CTL_DONE |
1083 DP_AUX_CH_CTL_TIME_OUT_ERROR |
1084 DP_AUX_CH_CTL_RECEIVE_ERROR);
1086 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR)
1089 /* DP CTS 1.2 Core Rev 1.1, 4.2.1.1 & 4.2.1.2
1090 * 400us delay required for errors and timeouts
1091 * Timeout errors from the HW already meet this
1092 * requirement so skip to next iteration
1094 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
1095 usleep_range(400, 500);
1098 if (status & DP_AUX_CH_CTL_DONE)
1103 if ((status & DP_AUX_CH_CTL_DONE) == 0) {
1104 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
1110 /* Check for timeout or receive error.
1111 * Timeouts occur when the sink is not connected
1113 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
1114 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
1119 /* Timeouts occur when the device isn't connected, so they're
1120 * "normal" -- don't fill the kernel log with these */
1121 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
1122 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
1127 /* Unload any bytes sent back from the other side */
1128 recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
1129 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
1132 * By BSpec: "Message sizes of 0 or >20 are not allowed."
1133 * We have no idea of what happened so we return -EBUSY so
1134 * drm layer takes care for the necessary retries.
1136 if (recv_bytes == 0 || recv_bytes > 20) {
1137 DRM_DEBUG_KMS("Forbidden recv_bytes = %d on aux transaction\n",
1140 * FIXME: This patch was created on top of a series that
1141 * organize the retries at drm level. There EBUSY should
1142 * also take care for 1ms wait before retrying.
1143 * That aux retries re-org is still needed and after that is
1144 * merged we remove this sleep from here.
1146 usleep_range(1000, 1500);
1151 if (recv_bytes > recv_size)
1152 recv_bytes = recv_size;
1154 for (i = 0; i < recv_bytes; i += 4)
1155 intel_dp_unpack_aux(I915_READ(intel_dp->aux_ch_data_reg[i >> 2]),
1156 recv + i, recv_bytes - i);
1160 pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);
1163 edp_panel_vdd_off(intel_dp, false);
1165 pps_unlock(intel_dp);
1170 #define BARE_ADDRESS_SIZE 3
1171 #define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
1173 intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
1175 struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux);
1176 uint8_t txbuf[20], rxbuf[20];
1177 size_t txsize, rxsize;
1180 txbuf[0] = (msg->request << 4) |
1181 ((msg->address >> 16) & 0xf);
1182 txbuf[1] = (msg->address >> 8) & 0xff;
1183 txbuf[2] = msg->address & 0xff;
1184 txbuf[3] = msg->size - 1;
1186 switch (msg->request & ~DP_AUX_I2C_MOT) {
1187 case DP_AUX_NATIVE_WRITE:
1188 case DP_AUX_I2C_WRITE:
1189 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
1190 txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
1191 rxsize = 2; /* 0 or 1 data bytes */
1193 if (WARN_ON(txsize > 20))
1196 WARN_ON(!msg->buffer != !msg->size);
1199 memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size);
1201 ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
1203 msg->reply = rxbuf[0] >> 4;
1206 /* Number of bytes written in a short write. */
1207 ret = clamp_t(int, rxbuf[1], 0, msg->size);
1209 /* Return payload size. */
1215 case DP_AUX_NATIVE_READ:
1216 case DP_AUX_I2C_READ:
1217 txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
1218 rxsize = msg->size + 1;
1220 if (WARN_ON(rxsize > 20))
1223 ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
1225 msg->reply = rxbuf[0] >> 4;
1227 * Assume happy day, and copy the data. The caller is
1228 * expected to check msg->reply before touching it.
1230 * Return payload size.
1233 memcpy(msg->buffer, rxbuf + 1, ret);
1245 static enum port intel_aux_port(struct drm_i915_private *dev_priv,
1248 const struct ddi_vbt_port_info *info =
1249 &dev_priv->vbt.ddi_port_info[port];
1252 if (!info->alternate_aux_channel) {
1253 DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n",
1254 port_name(port), port_name(port));
1258 switch (info->alternate_aux_channel) {
1272 MISSING_CASE(info->alternate_aux_channel);
1277 DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n",
1278 port_name(aux_port), port_name(port));
1283 static i915_reg_t g4x_aux_ctl_reg(struct drm_i915_private *dev_priv,
1290 return DP_AUX_CH_CTL(port);
1293 return DP_AUX_CH_CTL(PORT_B);
1297 static i915_reg_t g4x_aux_data_reg(struct drm_i915_private *dev_priv,
1298 enum port port, int index)
1304 return DP_AUX_CH_DATA(port, index);
1307 return DP_AUX_CH_DATA(PORT_B, index);
1311 static i915_reg_t ilk_aux_ctl_reg(struct drm_i915_private *dev_priv,
1316 return DP_AUX_CH_CTL(port);
1320 return PCH_DP_AUX_CH_CTL(port);
1323 return DP_AUX_CH_CTL(PORT_A);
1327 static i915_reg_t ilk_aux_data_reg(struct drm_i915_private *dev_priv,
1328 enum port port, int index)
1332 return DP_AUX_CH_DATA(port, index);
1336 return PCH_DP_AUX_CH_DATA(port, index);
1339 return DP_AUX_CH_DATA(PORT_A, index);
1343 static i915_reg_t skl_aux_ctl_reg(struct drm_i915_private *dev_priv,
1351 return DP_AUX_CH_CTL(port);
1354 return DP_AUX_CH_CTL(PORT_A);
1358 static i915_reg_t skl_aux_data_reg(struct drm_i915_private *dev_priv,
1359 enum port port, int index)
1366 return DP_AUX_CH_DATA(port, index);
1369 return DP_AUX_CH_DATA(PORT_A, index);
1373 static i915_reg_t intel_aux_ctl_reg(struct drm_i915_private *dev_priv,
1376 if (INTEL_INFO(dev_priv)->gen >= 9)
1377 return skl_aux_ctl_reg(dev_priv, port);
1378 else if (HAS_PCH_SPLIT(dev_priv))
1379 return ilk_aux_ctl_reg(dev_priv, port);
1381 return g4x_aux_ctl_reg(dev_priv, port);
1384 static i915_reg_t intel_aux_data_reg(struct drm_i915_private *dev_priv,
1385 enum port port, int index)
1387 if (INTEL_INFO(dev_priv)->gen >= 9)
1388 return skl_aux_data_reg(dev_priv, port, index);
1389 else if (HAS_PCH_SPLIT(dev_priv))
1390 return ilk_aux_data_reg(dev_priv, port, index);
1392 return g4x_aux_data_reg(dev_priv, port, index);
1395 static void intel_aux_reg_init(struct intel_dp *intel_dp)
1397 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
1398 enum port port = intel_aux_port(dev_priv,
1399 dp_to_dig_port(intel_dp)->port);
1402 intel_dp->aux_ch_ctl_reg = intel_aux_ctl_reg(dev_priv, port);
1403 for (i = 0; i < ARRAY_SIZE(intel_dp->aux_ch_data_reg); i++)
1404 intel_dp->aux_ch_data_reg[i] = intel_aux_data_reg(dev_priv, port, i);
1408 intel_dp_aux_fini(struct intel_dp *intel_dp)
1410 kfree(intel_dp->aux.name);
1414 intel_dp_aux_init(struct intel_dp *intel_dp)
1416 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1417 enum port port = intel_dig_port->port;
1419 intel_aux_reg_init(intel_dp);
1420 drm_dp_aux_init(&intel_dp->aux);
1422 /* Failure to allocate our preferred name is not critical */
1423 intel_dp->aux.name = kasprintf(GFP_KERNEL, "DPDDC-%c", port_name(port));
1424 intel_dp->aux.transfer = intel_dp_aux_transfer;
1427 bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp)
1429 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1430 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
1432 if ((IS_HASWELL(dev_priv) && !IS_HSW_ULX(dev_priv)) ||
1433 IS_BROADWELL(dev_priv) || (INTEL_GEN(dev_priv) >= 9))
1440 intel_dp_set_clock(struct intel_encoder *encoder,
1441 struct intel_crtc_state *pipe_config)
1443 struct drm_device *dev = encoder->base.dev;
1444 struct drm_i915_private *dev_priv = to_i915(dev);
1445 const struct dp_link_dpll *divisor = NULL;
1448 if (IS_G4X(dev_priv)) {
1449 divisor = gen4_dpll;
1450 count = ARRAY_SIZE(gen4_dpll);
1451 } else if (HAS_PCH_SPLIT(dev_priv)) {
1453 count = ARRAY_SIZE(pch_dpll);
1454 } else if (IS_CHERRYVIEW(dev_priv)) {
1456 count = ARRAY_SIZE(chv_dpll);
1457 } else if (IS_VALLEYVIEW(dev_priv)) {
1459 count = ARRAY_SIZE(vlv_dpll);
1462 if (divisor && count) {
1463 for (i = 0; i < count; i++) {
1464 if (pipe_config->port_clock == divisor[i].clock) {
1465 pipe_config->dpll = divisor[i].dpll;
1466 pipe_config->clock_set = true;
1473 static void snprintf_int_array(char *str, size_t len,
1474 const int *array, int nelem)
1480 for (i = 0; i < nelem; i++) {
1481 int r = snprintf(str, len, "%s%d", i ? ", " : "", array[i]);
1489 static void intel_dp_print_rates(struct intel_dp *intel_dp)
1491 const int *source_rates, *sink_rates;
1492 int source_len, sink_len, common_len;
1493 int common_rates[DP_MAX_SUPPORTED_RATES];
1494 char str[128]; /* FIXME: too big for stack? */
1496 if ((drm_debug & DRM_UT_KMS) == 0)
1499 source_len = intel_dp_source_rates(intel_dp, &source_rates);
1500 snprintf_int_array(str, sizeof(str), source_rates, source_len);
1501 DRM_DEBUG_KMS("source rates: %s\n", str);
1503 sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
1504 snprintf_int_array(str, sizeof(str), sink_rates, sink_len);
1505 DRM_DEBUG_KMS("sink rates: %s\n", str);
1507 common_len = intel_dp_common_rates(intel_dp, common_rates);
1508 snprintf_int_array(str, sizeof(str), common_rates, common_len);
1509 DRM_DEBUG_KMS("common rates: %s\n", str);
1513 __intel_dp_read_desc(struct intel_dp *intel_dp, struct intel_dp_desc *desc)
1515 u32 base = drm_dp_is_branch(intel_dp->dpcd) ? DP_BRANCH_OUI :
1518 return drm_dp_dpcd_read(&intel_dp->aux, base, desc, sizeof(*desc)) ==
1522 bool intel_dp_read_desc(struct intel_dp *intel_dp)
1524 struct intel_dp_desc *desc = &intel_dp->desc;
1525 bool oui_sup = intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] &
1529 if (!__intel_dp_read_desc(intel_dp, desc))
1532 dev_id_len = strnlen(desc->device_id, sizeof(desc->device_id));
1533 DRM_DEBUG_KMS("DP %s: OUI %*phD%s dev-ID %*pE HW-rev %d.%d SW-rev %d.%d\n",
1534 drm_dp_is_branch(intel_dp->dpcd) ? "branch" : "sink",
1535 (int)sizeof(desc->oui), desc->oui, oui_sup ? "" : "(NS)",
1536 dev_id_len, desc->device_id,
1537 desc->hw_rev >> 4, desc->hw_rev & 0xf,
1538 desc->sw_major_rev, desc->sw_minor_rev);
1543 static int rate_to_index(int find, const int *rates)
1547 for (i = 0; i < DP_MAX_SUPPORTED_RATES; ++i)
1548 if (find == rates[i])
1555 intel_dp_max_link_rate(struct intel_dp *intel_dp)
1557 int rates[DP_MAX_SUPPORTED_RATES] = {};
1560 len = intel_dp_common_rates(intel_dp, rates);
1561 if (WARN_ON(len <= 0))
1564 return rates[len - 1];
1567 int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
1569 return rate_to_index(rate, intel_dp->sink_rates);
1572 void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
1573 uint8_t *link_bw, uint8_t *rate_select)
1575 if (intel_dp->num_sink_rates) {
1578 intel_dp_rate_select(intel_dp, port_clock);
1580 *link_bw = drm_dp_link_rate_to_bw_code(port_clock);
1585 static int intel_dp_compute_bpp(struct intel_dp *intel_dp,
1586 struct intel_crtc_state *pipe_config)
1590 bpp = pipe_config->pipe_bpp;
1591 bpc = drm_dp_downstream_max_bpc(intel_dp->dpcd, intel_dp->downstream_ports);
1594 bpp = min(bpp, 3*bpc);
1600 intel_dp_compute_config(struct intel_encoder *encoder,
1601 struct intel_crtc_state *pipe_config,
1602 struct drm_connector_state *conn_state)
1604 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1605 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
1606 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1607 enum port port = dp_to_dig_port(intel_dp)->port;
1608 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
1609 struct intel_connector *intel_connector = intel_dp->attached_connector;
1610 int lane_count, clock;
1611 int min_lane_count = 1;
1612 int max_lane_count = intel_dp_max_lane_count(intel_dp);
1613 /* Conveniently, the link BW constants become indices with a shift...*/
1617 int link_avail, link_clock;
1618 int common_rates[DP_MAX_SUPPORTED_RATES] = {};
1620 uint8_t link_bw, rate_select;
1622 common_len = intel_dp_common_rates(intel_dp, common_rates);
1624 /* No common link rates between source and sink */
1625 WARN_ON(common_len <= 0);
1627 max_clock = common_len - 1;
1629 if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && port != PORT_A)
1630 pipe_config->has_pch_encoder = true;
1632 pipe_config->has_drrs = false;
1633 pipe_config->has_audio = intel_dp->has_audio && port != PORT_A;
1635 if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
1636 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
1639 if (INTEL_GEN(dev_priv) >= 9) {
1641 ret = skl_update_scaler_crtc(pipe_config);
1646 if (HAS_GMCH_DISPLAY(dev_priv))
1647 intel_gmch_panel_fitting(intel_crtc, pipe_config,
1648 intel_connector->panel.fitting_mode);
1650 intel_pch_panel_fitting(intel_crtc, pipe_config,
1651 intel_connector->panel.fitting_mode);
1654 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
1657 DRM_DEBUG_KMS("DP link computation with max lane count %i "
1658 "max bw %d pixel clock %iKHz\n",
1659 max_lane_count, common_rates[max_clock],
1660 adjusted_mode->crtc_clock);
1662 /* Walk through all bpp values. Luckily they're all nicely spaced with 2
1663 * bpc in between. */
1664 bpp = intel_dp_compute_bpp(intel_dp, pipe_config);
1665 if (is_edp(intel_dp)) {
1667 /* Get bpp from vbt only for panels that dont have bpp in edid */
1668 if (intel_connector->base.display_info.bpc == 0 &&
1669 (dev_priv->vbt.edp.bpp && dev_priv->vbt.edp.bpp < bpp)) {
1670 DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
1671 dev_priv->vbt.edp.bpp);
1672 bpp = dev_priv->vbt.edp.bpp;
1676 * Use the maximum clock and number of lanes the eDP panel
1677 * advertizes being capable of. The panels are generally
1678 * designed to support only a single clock and lane
1679 * configuration, and typically these values correspond to the
1680 * native resolution of the panel.
1682 min_lane_count = max_lane_count;
1683 min_clock = max_clock;
1686 for (; bpp >= 6*3; bpp -= 2*3) {
1687 mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
1690 for (clock = min_clock; clock <= max_clock; clock++) {
1691 for (lane_count = min_lane_count;
1692 lane_count <= max_lane_count;
1695 link_clock = common_rates[clock];
1696 link_avail = intel_dp_max_data_rate(link_clock,
1699 if (mode_rate <= link_avail) {
1709 if (intel_dp->color_range_auto) {
1712 * CEA-861-E - 5.1 Default Encoding Parameters
1713 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
1715 pipe_config->limited_color_range =
1717 drm_default_rgb_quant_range(adjusted_mode) ==
1718 HDMI_QUANTIZATION_RANGE_LIMITED;
1720 pipe_config->limited_color_range =
1721 intel_dp->limited_color_range;
1724 pipe_config->lane_count = lane_count;
1726 pipe_config->pipe_bpp = bpp;
1727 pipe_config->port_clock = common_rates[clock];
1729 intel_dp_compute_rate(intel_dp, pipe_config->port_clock,
1730 &link_bw, &rate_select);
1732 DRM_DEBUG_KMS("DP link bw %02x rate select %02x lane count %d clock %d bpp %d\n",
1733 link_bw, rate_select, pipe_config->lane_count,
1734 pipe_config->port_clock, bpp);
1735 DRM_DEBUG_KMS("DP link bw required %i available %i\n",
1736 mode_rate, link_avail);
1738 intel_link_compute_m_n(bpp, lane_count,
1739 adjusted_mode->crtc_clock,
1740 pipe_config->port_clock,
1741 &pipe_config->dp_m_n);
1743 if (intel_connector->panel.downclock_mode != NULL &&
1744 dev_priv->drrs.type == SEAMLESS_DRRS_SUPPORT) {
1745 pipe_config->has_drrs = true;
1746 intel_link_compute_m_n(bpp, lane_count,
1747 intel_connector->panel.downclock_mode->clock,
1748 pipe_config->port_clock,
1749 &pipe_config->dp_m2_n2);
1753 * DPLL0 VCO may need to be adjusted to get the correct
1754 * clock for eDP. This will affect cdclk as well.
1756 if (is_edp(intel_dp) &&
1757 (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) {
1760 switch (pipe_config->port_clock / 2) {
1770 to_intel_atomic_state(pipe_config->base.state)->cdclk_pll_vco = vco;
1773 if (!HAS_DDI(dev_priv))
1774 intel_dp_set_clock(encoder, pipe_config);
1779 void intel_dp_set_link_params(struct intel_dp *intel_dp,
1780 int link_rate, uint8_t lane_count,
1783 intel_dp->link_rate = link_rate;
1784 intel_dp->lane_count = lane_count;
1785 intel_dp->link_mst = link_mst;
1788 static void intel_dp_prepare(struct intel_encoder *encoder,
1789 struct intel_crtc_state *pipe_config)
1791 struct drm_device *dev = encoder->base.dev;
1792 struct drm_i915_private *dev_priv = to_i915(dev);
1793 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1794 enum port port = dp_to_dig_port(intel_dp)->port;
1795 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
1796 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
1798 intel_dp_set_link_params(intel_dp, pipe_config->port_clock,
1799 pipe_config->lane_count,
1800 intel_crtc_has_type(pipe_config,
1801 INTEL_OUTPUT_DP_MST));
1804 * There are four kinds of DP registers:
1811 * IBX PCH and CPU are the same for almost everything,
1812 * except that the CPU DP PLL is configured in this
1815 * CPT PCH is quite different, having many bits moved
1816 * to the TRANS_DP_CTL register instead. That
1817 * configuration happens (oddly) in ironlake_pch_enable
1820 /* Preserve the BIOS-computed detected bit. This is
1821 * supposed to be read-only.
1823 intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
1825 /* Handle DP bits in common between all three register formats */
1826 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
1827 intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count);
1829 /* Split out the IBX/CPU vs CPT settings */
1831 if (IS_GEN7(dev_priv) && port == PORT_A) {
1832 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
1833 intel_dp->DP |= DP_SYNC_HS_HIGH;
1834 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
1835 intel_dp->DP |= DP_SYNC_VS_HIGH;
1836 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
1838 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1839 intel_dp->DP |= DP_ENHANCED_FRAMING;
1841 intel_dp->DP |= crtc->pipe << 29;
1842 } else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
1845 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
1847 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
1848 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1849 trans_dp |= TRANS_DP_ENH_FRAMING;
1851 trans_dp &= ~TRANS_DP_ENH_FRAMING;
1852 I915_WRITE(TRANS_DP_CTL(crtc->pipe), trans_dp);
1854 if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
1855 intel_dp->DP |= DP_COLOR_RANGE_16_235;
1857 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
1858 intel_dp->DP |= DP_SYNC_HS_HIGH;
1859 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
1860 intel_dp->DP |= DP_SYNC_VS_HIGH;
1861 intel_dp->DP |= DP_LINK_TRAIN_OFF;
1863 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1864 intel_dp->DP |= DP_ENHANCED_FRAMING;
1866 if (IS_CHERRYVIEW(dev_priv))
1867 intel_dp->DP |= DP_PIPE_SELECT_CHV(crtc->pipe);
1868 else if (crtc->pipe == PIPE_B)
1869 intel_dp->DP |= DP_PIPEB_SELECT;
1873 #define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
1874 #define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
1876 #define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
1877 #define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
1879 #define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
1880 #define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
1882 static void intel_pps_verify_state(struct drm_i915_private *dev_priv,
1883 struct intel_dp *intel_dp);
1885 static void wait_panel_status(struct intel_dp *intel_dp,
1889 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1890 struct drm_i915_private *dev_priv = to_i915(dev);
1891 i915_reg_t pp_stat_reg, pp_ctrl_reg;
1893 lockdep_assert_held(&dev_priv->pps_mutex);
1895 intel_pps_verify_state(dev_priv, intel_dp);
1897 pp_stat_reg = _pp_stat_reg(intel_dp);
1898 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1900 DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
1902 I915_READ(pp_stat_reg),
1903 I915_READ(pp_ctrl_reg));
1905 if (intel_wait_for_register(dev_priv,
1906 pp_stat_reg, mask, value,
1908 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
1909 I915_READ(pp_stat_reg),
1910 I915_READ(pp_ctrl_reg));
1912 DRM_DEBUG_KMS("Wait complete\n");
1915 static void wait_panel_on(struct intel_dp *intel_dp)
1917 DRM_DEBUG_KMS("Wait for panel power on\n");
1918 wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
1921 static void wait_panel_off(struct intel_dp *intel_dp)
1923 DRM_DEBUG_KMS("Wait for panel power off time\n");
1924 wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
1927 static void wait_panel_power_cycle(struct intel_dp *intel_dp)
1929 ktime_t panel_power_on_time;
1930 s64 panel_power_off_duration;
1932 DRM_DEBUG_KMS("Wait for panel power cycle\n");
1934 /* take the difference of currrent time and panel power off time
1935 * and then make panel wait for t11_t12 if needed. */
1936 panel_power_on_time = ktime_get_boottime();
1937 panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
1939 /* When we disable the VDD override bit last we have to do the manual
1941 if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
1942 wait_remaining_ms_from_jiffies(jiffies,
1943 intel_dp->panel_power_cycle_delay - panel_power_off_duration);
1945 wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
1948 static void wait_backlight_on(struct intel_dp *intel_dp)
1950 wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
1951 intel_dp->backlight_on_delay);
1954 static void edp_wait_backlight_off(struct intel_dp *intel_dp)
1956 wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
1957 intel_dp->backlight_off_delay);
1960 /* Read the current pp_control value, unlocking the register if it
1964 static u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
1966 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1967 struct drm_i915_private *dev_priv = to_i915(dev);
1970 lockdep_assert_held(&dev_priv->pps_mutex);
1972 control = I915_READ(_pp_ctrl_reg(intel_dp));
1973 if (WARN_ON(!HAS_DDI(dev_priv) &&
1974 (control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
1975 control &= ~PANEL_UNLOCK_MASK;
1976 control |= PANEL_UNLOCK_REGS;
1982 * Must be paired with edp_panel_vdd_off().
1983 * Must hold pps_mutex around the whole on/off sequence.
1984 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
1986 static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
1988 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1989 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1990 struct intel_encoder *intel_encoder = &intel_dig_port->base;
1991 struct drm_i915_private *dev_priv = to_i915(dev);
1992 enum intel_display_power_domain power_domain;
1994 i915_reg_t pp_stat_reg, pp_ctrl_reg;
1995 bool need_to_disable = !intel_dp->want_panel_vdd;
1997 lockdep_assert_held(&dev_priv->pps_mutex);
1999 if (!is_edp(intel_dp))
2002 cancel_delayed_work(&intel_dp->panel_vdd_work);
2003 intel_dp->want_panel_vdd = true;
2005 if (edp_have_panel_vdd(intel_dp))
2006 return need_to_disable;
2008 power_domain = intel_display_port_aux_power_domain(intel_encoder);
2009 intel_display_power_get(dev_priv, power_domain);
2011 DRM_DEBUG_KMS("Turning eDP port %c VDD on\n",
2012 port_name(intel_dig_port->port));
2014 if (!edp_have_panel_power(intel_dp))
2015 wait_panel_power_cycle(intel_dp);
2017 pp = ironlake_get_pp_control(intel_dp);
2018 pp |= EDP_FORCE_VDD;
2020 pp_stat_reg = _pp_stat_reg(intel_dp);
2021 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2023 I915_WRITE(pp_ctrl_reg, pp);
2024 POSTING_READ(pp_ctrl_reg);
2025 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
2026 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
2028 * If the panel wasn't on, delay before accessing aux channel
2030 if (!edp_have_panel_power(intel_dp)) {
2031 DRM_DEBUG_KMS("eDP port %c panel power wasn't enabled\n",
2032 port_name(intel_dig_port->port));
2033 msleep(intel_dp->panel_power_up_delay);
2036 return need_to_disable;
2040 * Must be paired with intel_edp_panel_vdd_off() or
2041 * intel_edp_panel_off().
2042 * Nested calls to these functions are not allowed since
2043 * we drop the lock. Caller must use some higher level
2044 * locking to prevent nested calls from other threads.
2046 void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
2050 if (!is_edp(intel_dp))
2054 vdd = edp_panel_vdd_on(intel_dp);
2055 pps_unlock(intel_dp);
2057 I915_STATE_WARN(!vdd, "eDP port %c VDD already requested on\n",
2058 port_name(dp_to_dig_port(intel_dp)->port));
2061 static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
2063 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2064 struct drm_i915_private *dev_priv = to_i915(dev);
2065 struct intel_digital_port *intel_dig_port =
2066 dp_to_dig_port(intel_dp);
2067 struct intel_encoder *intel_encoder = &intel_dig_port->base;
2068 enum intel_display_power_domain power_domain;
2070 i915_reg_t pp_stat_reg, pp_ctrl_reg;
2072 lockdep_assert_held(&dev_priv->pps_mutex);
2074 WARN_ON(intel_dp->want_panel_vdd);
2076 if (!edp_have_panel_vdd(intel_dp))
2079 DRM_DEBUG_KMS("Turning eDP port %c VDD off\n",
2080 port_name(intel_dig_port->port));
2082 pp = ironlake_get_pp_control(intel_dp);
2083 pp &= ~EDP_FORCE_VDD;
2085 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2086 pp_stat_reg = _pp_stat_reg(intel_dp);
2088 I915_WRITE(pp_ctrl_reg, pp);
2089 POSTING_READ(pp_ctrl_reg);
2091 /* Make sure sequencer is idle before allowing subsequent activity */
2092 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
2093 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
2095 if ((pp & PANEL_POWER_ON) == 0)
2096 intel_dp->panel_power_off_time = ktime_get_boottime();
2098 power_domain = intel_display_port_aux_power_domain(intel_encoder);
2099 intel_display_power_put(dev_priv, power_domain);
2102 static void edp_panel_vdd_work(struct work_struct *__work)
2104 struct intel_dp *intel_dp = container_of(to_delayed_work(__work),
2105 struct intel_dp, panel_vdd_work);
2108 if (!intel_dp->want_panel_vdd)
2109 edp_panel_vdd_off_sync(intel_dp);
2110 pps_unlock(intel_dp);
2113 static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
2115 unsigned long delay;
2118 * Queue the timer to fire a long time from now (relative to the power
2119 * down delay) to keep the panel power up across a sequence of
2122 delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
2123 schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
2127 * Must be paired with edp_panel_vdd_on().
2128 * Must hold pps_mutex around the whole on/off sequence.
2129 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
2131 static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
2133 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
2135 lockdep_assert_held(&dev_priv->pps_mutex);
2137 if (!is_edp(intel_dp))
2140 I915_STATE_WARN(!intel_dp->want_panel_vdd, "eDP port %c VDD not forced on",
2141 port_name(dp_to_dig_port(intel_dp)->port));
2143 intel_dp->want_panel_vdd = false;
2146 edp_panel_vdd_off_sync(intel_dp);
2148 edp_panel_vdd_schedule_off(intel_dp);
2151 static void edp_panel_on(struct intel_dp *intel_dp)
2153 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2154 struct drm_i915_private *dev_priv = to_i915(dev);
2156 i915_reg_t pp_ctrl_reg;
2158 lockdep_assert_held(&dev_priv->pps_mutex);
2160 if (!is_edp(intel_dp))
2163 DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
2164 port_name(dp_to_dig_port(intel_dp)->port));
2166 if (WARN(edp_have_panel_power(intel_dp),
2167 "eDP port %c panel power already on\n",
2168 port_name(dp_to_dig_port(intel_dp)->port)))
2171 wait_panel_power_cycle(intel_dp);
2173 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2174 pp = ironlake_get_pp_control(intel_dp);
2175 if (IS_GEN5(dev_priv)) {
2176 /* ILK workaround: disable reset around power sequence */
2177 pp &= ~PANEL_POWER_RESET;
2178 I915_WRITE(pp_ctrl_reg, pp);
2179 POSTING_READ(pp_ctrl_reg);
2182 pp |= PANEL_POWER_ON;
2183 if (!IS_GEN5(dev_priv))
2184 pp |= PANEL_POWER_RESET;
2186 I915_WRITE(pp_ctrl_reg, pp);
2187 POSTING_READ(pp_ctrl_reg);
2189 wait_panel_on(intel_dp);
2190 intel_dp->last_power_on = jiffies;
2192 if (IS_GEN5(dev_priv)) {
2193 pp |= PANEL_POWER_RESET; /* restore panel reset bit */
2194 I915_WRITE(pp_ctrl_reg, pp);
2195 POSTING_READ(pp_ctrl_reg);
2199 void intel_edp_panel_on(struct intel_dp *intel_dp)
2201 if (!is_edp(intel_dp))
2205 edp_panel_on(intel_dp);
2206 pps_unlock(intel_dp);
2210 static void edp_panel_off(struct intel_dp *intel_dp)
2212 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2213 struct intel_encoder *intel_encoder = &intel_dig_port->base;
2214 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2215 struct drm_i915_private *dev_priv = to_i915(dev);
2216 enum intel_display_power_domain power_domain;
2218 i915_reg_t pp_ctrl_reg;
2220 lockdep_assert_held(&dev_priv->pps_mutex);
2222 if (!is_edp(intel_dp))
2225 DRM_DEBUG_KMS("Turn eDP port %c panel power off\n",
2226 port_name(dp_to_dig_port(intel_dp)->port));
2228 WARN(!intel_dp->want_panel_vdd, "Need eDP port %c VDD to turn off panel\n",
2229 port_name(dp_to_dig_port(intel_dp)->port));
2231 pp = ironlake_get_pp_control(intel_dp);
2232 /* We need to switch off panel power _and_ force vdd, for otherwise some
2233 * panels get very unhappy and cease to work. */
2234 pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
2237 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2239 intel_dp->want_panel_vdd = false;
2241 I915_WRITE(pp_ctrl_reg, pp);
2242 POSTING_READ(pp_ctrl_reg);
2244 intel_dp->panel_power_off_time = ktime_get_boottime();
2245 wait_panel_off(intel_dp);
2247 /* We got a reference when we enabled the VDD. */
2248 power_domain = intel_display_port_aux_power_domain(intel_encoder);
2249 intel_display_power_put(dev_priv, power_domain);
2252 void intel_edp_panel_off(struct intel_dp *intel_dp)
2254 if (!is_edp(intel_dp))
2258 edp_panel_off(intel_dp);
2259 pps_unlock(intel_dp);
2262 /* Enable backlight in the panel power control. */
2263 static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
2265 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2266 struct drm_device *dev = intel_dig_port->base.base.dev;
2267 struct drm_i915_private *dev_priv = to_i915(dev);
2269 i915_reg_t pp_ctrl_reg;
2272 * If we enable the backlight right away following a panel power
2273 * on, we may see slight flicker as the panel syncs with the eDP
2274 * link. So delay a bit to make sure the image is solid before
2275 * allowing it to appear.
2277 wait_backlight_on(intel_dp);
2281 pp = ironlake_get_pp_control(intel_dp);
2282 pp |= EDP_BLC_ENABLE;
2284 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2286 I915_WRITE(pp_ctrl_reg, pp);
2287 POSTING_READ(pp_ctrl_reg);
2289 pps_unlock(intel_dp);
2292 /* Enable backlight PWM and backlight PP control. */
2293 void intel_edp_backlight_on(struct intel_dp *intel_dp)
2295 if (!is_edp(intel_dp))
2298 DRM_DEBUG_KMS("\n");
2300 intel_panel_enable_backlight(intel_dp->attached_connector);
2301 _intel_edp_backlight_on(intel_dp);
2304 /* Disable backlight in the panel power control. */
2305 static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
2307 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2308 struct drm_i915_private *dev_priv = to_i915(dev);
2310 i915_reg_t pp_ctrl_reg;
2312 if (!is_edp(intel_dp))
2317 pp = ironlake_get_pp_control(intel_dp);
2318 pp &= ~EDP_BLC_ENABLE;
2320 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2322 I915_WRITE(pp_ctrl_reg, pp);
2323 POSTING_READ(pp_ctrl_reg);
2325 pps_unlock(intel_dp);
2327 intel_dp->last_backlight_off = jiffies;
2328 edp_wait_backlight_off(intel_dp);
2331 /* Disable backlight PP control and backlight PWM. */
2332 void intel_edp_backlight_off(struct intel_dp *intel_dp)
2334 if (!is_edp(intel_dp))
2337 DRM_DEBUG_KMS("\n");
2339 _intel_edp_backlight_off(intel_dp);
2340 intel_panel_disable_backlight(intel_dp->attached_connector);
2344 * Hook for controlling the panel power control backlight through the bl_power
2345 * sysfs attribute. Take care to handle multiple calls.
2347 static void intel_edp_backlight_power(struct intel_connector *connector,
2350 struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
2354 is_enabled = ironlake_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
2355 pps_unlock(intel_dp);
2357 if (is_enabled == enable)
2360 DRM_DEBUG_KMS("panel power control backlight %s\n",
2361 enable ? "enable" : "disable");
2364 _intel_edp_backlight_on(intel_dp);
2366 _intel_edp_backlight_off(intel_dp);
2369 static void assert_dp_port(struct intel_dp *intel_dp, bool state)
2371 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2372 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
2373 bool cur_state = I915_READ(intel_dp->output_reg) & DP_PORT_EN;
2375 I915_STATE_WARN(cur_state != state,
2376 "DP port %c state assertion failure (expected %s, current %s)\n",
2377 port_name(dig_port->port),
2378 onoff(state), onoff(cur_state));
2380 #define assert_dp_port_disabled(d) assert_dp_port((d), false)
2382 static void assert_edp_pll(struct drm_i915_private *dev_priv, bool state)
2384 bool cur_state = I915_READ(DP_A) & DP_PLL_ENABLE;
2386 I915_STATE_WARN(cur_state != state,
2387 "eDP PLL state assertion failure (expected %s, current %s)\n",
2388 onoff(state), onoff(cur_state));
2390 #define assert_edp_pll_enabled(d) assert_edp_pll((d), true)
2391 #define assert_edp_pll_disabled(d) assert_edp_pll((d), false)
2393 static void ironlake_edp_pll_on(struct intel_dp *intel_dp,
2394 struct intel_crtc_state *pipe_config)
2396 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
2397 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
2399 assert_pipe_disabled(dev_priv, crtc->pipe);
2400 assert_dp_port_disabled(intel_dp);
2401 assert_edp_pll_disabled(dev_priv);
2403 DRM_DEBUG_KMS("enabling eDP PLL for clock %d\n",
2404 pipe_config->port_clock);
2406 intel_dp->DP &= ~DP_PLL_FREQ_MASK;
2408 if (pipe_config->port_clock == 162000)
2409 intel_dp->DP |= DP_PLL_FREQ_162MHZ;
2411 intel_dp->DP |= DP_PLL_FREQ_270MHZ;
2413 I915_WRITE(DP_A, intel_dp->DP);
2418 * [DevILK] Work around required when enabling DP PLL
2419 * while a pipe is enabled going to FDI:
2420 * 1. Wait for the start of vertical blank on the enabled pipe going to FDI
2421 * 2. Program DP PLL enable
2423 if (IS_GEN5(dev_priv))
2424 intel_wait_for_vblank_if_active(dev_priv, !crtc->pipe);
2426 intel_dp->DP |= DP_PLL_ENABLE;
2428 I915_WRITE(DP_A, intel_dp->DP);
2433 static void ironlake_edp_pll_off(struct intel_dp *intel_dp)
2435 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2436 struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
2437 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
2439 assert_pipe_disabled(dev_priv, crtc->pipe);
2440 assert_dp_port_disabled(intel_dp);
2441 assert_edp_pll_enabled(dev_priv);
2443 DRM_DEBUG_KMS("disabling eDP PLL\n");
2445 intel_dp->DP &= ~DP_PLL_ENABLE;
2447 I915_WRITE(DP_A, intel_dp->DP);
2452 /* If the sink supports it, try to set the power state appropriately */
2453 void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
2457 /* Should have a valid DPCD by this point */
2458 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
2461 if (mode != DRM_MODE_DPMS_ON) {
2462 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
2465 struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
2468 * When turning on, we need to retry for 1ms to give the sink
2471 for (i = 0; i < 3; i++) {
2472 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
2479 if (ret == 1 && lspcon->active)
2480 lspcon_wait_pcon_mode(lspcon);
2484 DRM_DEBUG_KMS("failed to %s sink power state\n",
2485 mode == DRM_MODE_DPMS_ON ? "enable" : "disable");
2488 static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
2491 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2492 enum port port = dp_to_dig_port(intel_dp)->port;
2493 struct drm_device *dev = encoder->base.dev;
2494 struct drm_i915_private *dev_priv = to_i915(dev);
2495 enum intel_display_power_domain power_domain;
2499 power_domain = intel_display_port_power_domain(encoder);
2500 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
2505 tmp = I915_READ(intel_dp->output_reg);
2507 if (!(tmp & DP_PORT_EN))
2510 if (IS_GEN7(dev_priv) && port == PORT_A) {
2511 *pipe = PORT_TO_PIPE_CPT(tmp);
2512 } else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
2515 for_each_pipe(dev_priv, p) {
2516 u32 trans_dp = I915_READ(TRANS_DP_CTL(p));
2517 if (TRANS_DP_PIPE_TO_PORT(trans_dp) == port) {
2525 DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n",
2526 i915_mmio_reg_offset(intel_dp->output_reg));
2527 } else if (IS_CHERRYVIEW(dev_priv)) {
2528 *pipe = DP_PORT_TO_PIPE_CHV(tmp);
2530 *pipe = PORT_TO_PIPE(tmp);
2536 intel_display_power_put(dev_priv, power_domain);
2541 static void intel_dp_get_config(struct intel_encoder *encoder,
2542 struct intel_crtc_state *pipe_config)
2544 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2546 struct drm_device *dev = encoder->base.dev;
2547 struct drm_i915_private *dev_priv = to_i915(dev);
2548 enum port port = dp_to_dig_port(intel_dp)->port;
2549 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2551 tmp = I915_READ(intel_dp->output_reg);
2553 pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A;
2555 if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
2556 u32 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
2558 if (trans_dp & TRANS_DP_HSYNC_ACTIVE_HIGH)
2559 flags |= DRM_MODE_FLAG_PHSYNC;
2561 flags |= DRM_MODE_FLAG_NHSYNC;
2563 if (trans_dp & TRANS_DP_VSYNC_ACTIVE_HIGH)
2564 flags |= DRM_MODE_FLAG_PVSYNC;
2566 flags |= DRM_MODE_FLAG_NVSYNC;
2568 if (tmp & DP_SYNC_HS_HIGH)
2569 flags |= DRM_MODE_FLAG_PHSYNC;
2571 flags |= DRM_MODE_FLAG_NHSYNC;
2573 if (tmp & DP_SYNC_VS_HIGH)
2574 flags |= DRM_MODE_FLAG_PVSYNC;
2576 flags |= DRM_MODE_FLAG_NVSYNC;
2579 pipe_config->base.adjusted_mode.flags |= flags;
2581 if (IS_G4X(dev_priv) && tmp & DP_COLOR_RANGE_16_235)
2582 pipe_config->limited_color_range = true;
2584 pipe_config->lane_count =
2585 ((tmp & DP_PORT_WIDTH_MASK) >> DP_PORT_WIDTH_SHIFT) + 1;
2587 intel_dp_get_m_n(crtc, pipe_config);
2589 if (port == PORT_A) {
2590 if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_162MHZ)
2591 pipe_config->port_clock = 162000;
2593 pipe_config->port_clock = 270000;
2596 pipe_config->base.adjusted_mode.crtc_clock =
2597 intel_dotclock_calculate(pipe_config->port_clock,
2598 &pipe_config->dp_m_n);
2600 if (is_edp(intel_dp) && dev_priv->vbt.edp.bpp &&
2601 pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
2603 * This is a big fat ugly hack.
2605 * Some machines in UEFI boot mode provide us a VBT that has 18
2606 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
2607 * unknown we fail to light up. Yet the same BIOS boots up with
2608 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
2609 * max, not what it tells us to use.
2611 * Note: This will still be broken if the eDP panel is not lit
2612 * up by the BIOS, and thus we can't get the mode at module
2615 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
2616 pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
2617 dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
2621 static void intel_disable_dp(struct intel_encoder *encoder,
2622 struct intel_crtc_state *old_crtc_state,
2623 struct drm_connector_state *old_conn_state)
2625 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2626 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2628 if (old_crtc_state->has_audio)
2629 intel_audio_codec_disable(encoder);
2631 if (HAS_PSR(dev_priv) && !HAS_DDI(dev_priv))
2632 intel_psr_disable(intel_dp);
2634 /* Make sure the panel is off before trying to change the mode. But also
2635 * ensure that we have vdd while we switch off the panel. */
2636 intel_edp_panel_vdd_on(intel_dp);
2637 intel_edp_backlight_off(intel_dp);
2638 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
2639 intel_edp_panel_off(intel_dp);
2641 /* disable the port before the pipe on g4x */
2642 if (INTEL_GEN(dev_priv) < 5)
2643 intel_dp_link_down(intel_dp);
2646 static void ilk_post_disable_dp(struct intel_encoder *encoder,
2647 struct intel_crtc_state *old_crtc_state,
2648 struct drm_connector_state *old_conn_state)
2650 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2651 enum port port = dp_to_dig_port(intel_dp)->port;
2653 intel_dp_link_down(intel_dp);
2655 /* Only ilk+ has port A */
2657 ironlake_edp_pll_off(intel_dp);
2660 static void vlv_post_disable_dp(struct intel_encoder *encoder,
2661 struct intel_crtc_state *old_crtc_state,
2662 struct drm_connector_state *old_conn_state)
2664 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2666 intel_dp_link_down(intel_dp);
2669 static void chv_post_disable_dp(struct intel_encoder *encoder,
2670 struct intel_crtc_state *old_crtc_state,
2671 struct drm_connector_state *old_conn_state)
2673 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2674 struct drm_device *dev = encoder->base.dev;
2675 struct drm_i915_private *dev_priv = to_i915(dev);
2677 intel_dp_link_down(intel_dp);
2679 mutex_lock(&dev_priv->sb_lock);
2681 /* Assert data lane reset */
2682 chv_data_lane_soft_reset(encoder, true);
2684 mutex_unlock(&dev_priv->sb_lock);
2688 _intel_dp_set_link_train(struct intel_dp *intel_dp,
2690 uint8_t dp_train_pat)
2692 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2693 struct drm_device *dev = intel_dig_port->base.base.dev;
2694 struct drm_i915_private *dev_priv = to_i915(dev);
2695 enum port port = intel_dig_port->port;
2697 if (dp_train_pat & DP_TRAINING_PATTERN_MASK)
2698 DRM_DEBUG_KMS("Using DP training pattern TPS%d\n",
2699 dp_train_pat & DP_TRAINING_PATTERN_MASK);
2701 if (HAS_DDI(dev_priv)) {
2702 uint32_t temp = I915_READ(DP_TP_CTL(port));
2704 if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
2705 temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
2707 temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
2709 temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
2710 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2711 case DP_TRAINING_PATTERN_DISABLE:
2712 temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
2715 case DP_TRAINING_PATTERN_1:
2716 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
2718 case DP_TRAINING_PATTERN_2:
2719 temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
2721 case DP_TRAINING_PATTERN_3:
2722 temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
2725 I915_WRITE(DP_TP_CTL(port), temp);
2727 } else if ((IS_GEN7(dev_priv) && port == PORT_A) ||
2728 (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
2729 *DP &= ~DP_LINK_TRAIN_MASK_CPT;
2731 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2732 case DP_TRAINING_PATTERN_DISABLE:
2733 *DP |= DP_LINK_TRAIN_OFF_CPT;
2735 case DP_TRAINING_PATTERN_1:
2736 *DP |= DP_LINK_TRAIN_PAT_1_CPT;
2738 case DP_TRAINING_PATTERN_2:
2739 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
2741 case DP_TRAINING_PATTERN_3:
2742 DRM_DEBUG_KMS("TPS3 not supported, using TPS2 instead\n");
2743 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
2748 if (IS_CHERRYVIEW(dev_priv))
2749 *DP &= ~DP_LINK_TRAIN_MASK_CHV;
2751 *DP &= ~DP_LINK_TRAIN_MASK;
2753 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2754 case DP_TRAINING_PATTERN_DISABLE:
2755 *DP |= DP_LINK_TRAIN_OFF;
2757 case DP_TRAINING_PATTERN_1:
2758 *DP |= DP_LINK_TRAIN_PAT_1;
2760 case DP_TRAINING_PATTERN_2:
2761 *DP |= DP_LINK_TRAIN_PAT_2;
2763 case DP_TRAINING_PATTERN_3:
2764 if (IS_CHERRYVIEW(dev_priv)) {
2765 *DP |= DP_LINK_TRAIN_PAT_3_CHV;
2767 DRM_DEBUG_KMS("TPS3 not supported, using TPS2 instead\n");
2768 *DP |= DP_LINK_TRAIN_PAT_2;
2775 static void intel_dp_enable_port(struct intel_dp *intel_dp,
2776 struct intel_crtc_state *old_crtc_state)
2778 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2779 struct drm_i915_private *dev_priv = to_i915(dev);
2781 /* enable with pattern 1 (as per spec) */
2783 intel_dp_program_link_training_pattern(intel_dp, DP_TRAINING_PATTERN_1);
2786 * Magic for VLV/CHV. We _must_ first set up the register
2787 * without actually enabling the port, and then do another
2788 * write to enable the port. Otherwise link training will
2789 * fail when the power sequencer is freshly used for this port.
2791 intel_dp->DP |= DP_PORT_EN;
2792 if (old_crtc_state->has_audio)
2793 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
2795 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
2796 POSTING_READ(intel_dp->output_reg);
2799 static void intel_enable_dp(struct intel_encoder *encoder,
2800 struct intel_crtc_state *pipe_config,
2801 struct drm_connector_state *conn_state)
2803 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2804 struct drm_device *dev = encoder->base.dev;
2805 struct drm_i915_private *dev_priv = to_i915(dev);
2806 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2807 uint32_t dp_reg = I915_READ(intel_dp->output_reg);
2808 enum pipe pipe = crtc->pipe;
2810 if (WARN_ON(dp_reg & DP_PORT_EN))
2815 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
2816 vlv_init_panel_power_sequencer(intel_dp);
2818 intel_dp_enable_port(intel_dp, pipe_config);
2820 edp_panel_vdd_on(intel_dp);
2821 edp_panel_on(intel_dp);
2822 edp_panel_vdd_off(intel_dp, true);
2824 pps_unlock(intel_dp);
2826 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
2827 unsigned int lane_mask = 0x0;
2829 if (IS_CHERRYVIEW(dev_priv))
2830 lane_mask = intel_dp_unused_lane_mask(pipe_config->lane_count);
2832 vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp),
2836 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
2837 intel_dp_start_link_train(intel_dp);
2838 intel_dp_stop_link_train(intel_dp);
2840 if (pipe_config->has_audio) {
2841 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
2843 intel_audio_codec_enable(encoder, pipe_config, conn_state);
2847 static void g4x_enable_dp(struct intel_encoder *encoder,
2848 struct intel_crtc_state *pipe_config,
2849 struct drm_connector_state *conn_state)
2851 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2853 intel_enable_dp(encoder, pipe_config, conn_state);
2854 intel_edp_backlight_on(intel_dp);
2857 static void vlv_enable_dp(struct intel_encoder *encoder,
2858 struct intel_crtc_state *pipe_config,
2859 struct drm_connector_state *conn_state)
2861 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2863 intel_edp_backlight_on(intel_dp);
2864 intel_psr_enable(intel_dp);
2867 static void g4x_pre_enable_dp(struct intel_encoder *encoder,
2868 struct intel_crtc_state *pipe_config,
2869 struct drm_connector_state *conn_state)
2871 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2872 enum port port = dp_to_dig_port(intel_dp)->port;
2874 intel_dp_prepare(encoder, pipe_config);
2876 /* Only ilk+ has port A */
2878 ironlake_edp_pll_on(intel_dp, pipe_config);
2881 static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
2883 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2884 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
2885 enum pipe pipe = intel_dp->pps_pipe;
2886 i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
2888 WARN_ON(intel_dp->active_pipe != INVALID_PIPE);
2890 edp_panel_vdd_off_sync(intel_dp);
2893 * VLV seems to get confused when multiple power seqeuencers
2894 * have the same port selected (even if only one has power/vdd
2895 * enabled). The failure manifests as vlv_wait_port_ready() failing
2896 * CHV on the other hand doesn't seem to mind having the same port
2897 * selected in multiple power seqeuencers, but let's clear the
2898 * port select always when logically disconnecting a power sequencer
2901 DRM_DEBUG_KMS("detaching pipe %c power sequencer from port %c\n",
2902 pipe_name(pipe), port_name(intel_dig_port->port));
2903 I915_WRITE(pp_on_reg, 0);
2904 POSTING_READ(pp_on_reg);
2906 intel_dp->pps_pipe = INVALID_PIPE;
2909 static void vlv_steal_power_sequencer(struct drm_device *dev,
2912 struct drm_i915_private *dev_priv = to_i915(dev);
2913 struct intel_encoder *encoder;
2915 lockdep_assert_held(&dev_priv->pps_mutex);
2917 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
2920 for_each_intel_encoder(dev, encoder) {
2921 struct intel_dp *intel_dp;
2924 if (encoder->type != INTEL_OUTPUT_DP &&
2925 encoder->type != INTEL_OUTPUT_EDP)
2928 intel_dp = enc_to_intel_dp(&encoder->base);
2929 port = dp_to_dig_port(intel_dp)->port;
2931 WARN(intel_dp->active_pipe == pipe,
2932 "stealing pipe %c power sequencer from active (e)DP port %c\n",
2933 pipe_name(pipe), port_name(port));
2935 if (intel_dp->pps_pipe != pipe)
2938 DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
2939 pipe_name(pipe), port_name(port));
2941 /* make sure vdd is off before we steal it */
2942 vlv_detach_power_sequencer(intel_dp);
2946 static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp)
2948 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2949 struct intel_encoder *encoder = &intel_dig_port->base;
2950 struct drm_device *dev = encoder->base.dev;
2951 struct drm_i915_private *dev_priv = to_i915(dev);
2952 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2954 lockdep_assert_held(&dev_priv->pps_mutex);
2956 WARN_ON(intel_dp->active_pipe != INVALID_PIPE);
2958 if (intel_dp->pps_pipe != INVALID_PIPE &&
2959 intel_dp->pps_pipe != crtc->pipe) {
2961 * If another power sequencer was being used on this
2962 * port previously make sure to turn off vdd there while
2963 * we still have control of it.
2965 vlv_detach_power_sequencer(intel_dp);
2969 * We may be stealing the power
2970 * sequencer from another port.
2972 vlv_steal_power_sequencer(dev, crtc->pipe);
2974 intel_dp->active_pipe = crtc->pipe;
2976 if (!is_edp(intel_dp))
2979 /* now it's all ours */
2980 intel_dp->pps_pipe = crtc->pipe;
2982 DRM_DEBUG_KMS("initializing pipe %c power sequencer for port %c\n",
2983 pipe_name(intel_dp->pps_pipe), port_name(intel_dig_port->port));
2985 /* init power sequencer on this pipe and port */
2986 intel_dp_init_panel_power_sequencer(dev, intel_dp);
2987 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, true);
2990 static void vlv_pre_enable_dp(struct intel_encoder *encoder,
2991 struct intel_crtc_state *pipe_config,
2992 struct drm_connector_state *conn_state)
2994 vlv_phy_pre_encoder_enable(encoder);
2996 intel_enable_dp(encoder, pipe_config, conn_state);
2999 static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder,
3000 struct intel_crtc_state *pipe_config,
3001 struct drm_connector_state *conn_state)
3003 intel_dp_prepare(encoder, pipe_config);
3005 vlv_phy_pre_pll_enable(encoder);
3008 static void chv_pre_enable_dp(struct intel_encoder *encoder,
3009 struct intel_crtc_state *pipe_config,
3010 struct drm_connector_state *conn_state)
3012 chv_phy_pre_encoder_enable(encoder);
3014 intel_enable_dp(encoder, pipe_config, conn_state);
3016 /* Second common lane will stay alive on its own now */
3017 chv_phy_release_cl2_override(encoder);
3020 static void chv_dp_pre_pll_enable(struct intel_encoder *encoder,
3021 struct intel_crtc_state *pipe_config,
3022 struct drm_connector_state *conn_state)
3024 intel_dp_prepare(encoder, pipe_config);
3026 chv_phy_pre_pll_enable(encoder);
3029 static void chv_dp_post_pll_disable(struct intel_encoder *encoder,
3030 struct intel_crtc_state *pipe_config,
3031 struct drm_connector_state *conn_state)
3033 chv_phy_post_pll_disable(encoder);
3037 * Fetch AUX CH registers 0x202 - 0x207 which contain
3038 * link status information
3041 intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
3043 return drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS, link_status,
3044 DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;
3047 /* These are source-specific values. */
3049 intel_dp_voltage_max(struct intel_dp *intel_dp)
3051 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
3052 enum port port = dp_to_dig_port(intel_dp)->port;
3054 if (IS_GEN9_LP(dev_priv))
3055 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3056 else if (INTEL_GEN(dev_priv) >= 9) {
3057 if (dev_priv->vbt.edp.low_vswing && port == PORT_A)
3058 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3059 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
3060 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
3061 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3062 else if (IS_GEN7(dev_priv) && port == PORT_A)
3063 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
3064 else if (HAS_PCH_CPT(dev_priv) && port != PORT_A)
3065 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3067 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
3071 intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing)
3073 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
3074 enum port port = dp_to_dig_port(intel_dp)->port;
3076 if (INTEL_GEN(dev_priv) >= 9) {
3077 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3078 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3079 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3080 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3081 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3082 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3083 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3084 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3085 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3087 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3089 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
3090 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3091 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3092 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3093 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3094 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3095 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3096 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3097 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3099 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3101 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
3102 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3103 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3104 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3105 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3106 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3107 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3108 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3109 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3111 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3113 } else if (IS_GEN7(dev_priv) && port == PORT_A) {
3114 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3115 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3116 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3117 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3118 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3119 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3121 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3124 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3125 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3126 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3127 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3128 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3129 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3130 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3131 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3133 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3138 static uint32_t vlv_signal_levels(struct intel_dp *intel_dp)
3140 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3141 unsigned long demph_reg_value, preemph_reg_value,
3142 uniqtranscale_reg_value;
3143 uint8_t train_set = intel_dp->train_set[0];
3145 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3146 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3147 preemph_reg_value = 0x0004000;
3148 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3149 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3150 demph_reg_value = 0x2B405555;
3151 uniqtranscale_reg_value = 0x552AB83A;
3153 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3154 demph_reg_value = 0x2B404040;
3155 uniqtranscale_reg_value = 0x5548B83A;
3157 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3158 demph_reg_value = 0x2B245555;
3159 uniqtranscale_reg_value = 0x5560B83A;
3161 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3162 demph_reg_value = 0x2B405555;
3163 uniqtranscale_reg_value = 0x5598DA3A;
3169 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3170 preemph_reg_value = 0x0002000;
3171 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3172 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3173 demph_reg_value = 0x2B404040;
3174 uniqtranscale_reg_value = 0x5552B83A;
3176 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3177 demph_reg_value = 0x2B404848;
3178 uniqtranscale_reg_value = 0x5580B83A;
3180 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3181 demph_reg_value = 0x2B404040;
3182 uniqtranscale_reg_value = 0x55ADDA3A;
3188 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3189 preemph_reg_value = 0x0000000;
3190 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3191 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3192 demph_reg_value = 0x2B305555;
3193 uniqtranscale_reg_value = 0x5570B83A;
3195 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3196 demph_reg_value = 0x2B2B4040;
3197 uniqtranscale_reg_value = 0x55ADDA3A;
3203 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3204 preemph_reg_value = 0x0006000;
3205 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3206 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3207 demph_reg_value = 0x1B405555;
3208 uniqtranscale_reg_value = 0x55ADDA3A;
3218 vlv_set_phy_signal_level(encoder, demph_reg_value, preemph_reg_value,
3219 uniqtranscale_reg_value, 0);
3224 static uint32_t chv_signal_levels(struct intel_dp *intel_dp)
3226 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3227 u32 deemph_reg_value, margin_reg_value;
3228 bool uniq_trans_scale = false;
3229 uint8_t train_set = intel_dp->train_set[0];
3231 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3232 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3233 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3234 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3235 deemph_reg_value = 128;
3236 margin_reg_value = 52;
3238 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3239 deemph_reg_value = 128;
3240 margin_reg_value = 77;
3242 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3243 deemph_reg_value = 128;
3244 margin_reg_value = 102;
3246 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3247 deemph_reg_value = 128;
3248 margin_reg_value = 154;
3249 uniq_trans_scale = true;
3255 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3256 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3257 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3258 deemph_reg_value = 85;
3259 margin_reg_value = 78;
3261 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3262 deemph_reg_value = 85;
3263 margin_reg_value = 116;
3265 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3266 deemph_reg_value = 85;
3267 margin_reg_value = 154;
3273 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3274 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3275 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3276 deemph_reg_value = 64;
3277 margin_reg_value = 104;
3279 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3280 deemph_reg_value = 64;
3281 margin_reg_value = 154;
3287 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3288 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3289 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3290 deemph_reg_value = 43;
3291 margin_reg_value = 154;
3301 chv_set_phy_signal_level(encoder, deemph_reg_value,
3302 margin_reg_value, uniq_trans_scale);
3308 gen4_signal_levels(uint8_t train_set)
3310 uint32_t signal_levels = 0;
3312 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3313 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3315 signal_levels |= DP_VOLTAGE_0_4;
3317 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3318 signal_levels |= DP_VOLTAGE_0_6;
3320 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3321 signal_levels |= DP_VOLTAGE_0_8;
3323 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3324 signal_levels |= DP_VOLTAGE_1_2;
3327 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3328 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3330 signal_levels |= DP_PRE_EMPHASIS_0;
3332 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3333 signal_levels |= DP_PRE_EMPHASIS_3_5;
3335 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3336 signal_levels |= DP_PRE_EMPHASIS_6;
3338 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3339 signal_levels |= DP_PRE_EMPHASIS_9_5;
3342 return signal_levels;
3345 /* Gen6's DP voltage swing and pre-emphasis control */
3347 gen6_edp_signal_levels(uint8_t train_set)
3349 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3350 DP_TRAIN_PRE_EMPHASIS_MASK);
3351 switch (signal_levels) {
3352 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3353 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3354 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
3355 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3356 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B;
3357 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3358 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3359 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B;
3360 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3361 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3362 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B;
3363 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3364 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3365 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B;
3367 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3368 "0x%x\n", signal_levels);
3369 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
3373 /* Gen7's DP voltage swing and pre-emphasis control */
3375 gen7_edp_signal_levels(uint8_t train_set)
3377 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3378 DP_TRAIN_PRE_EMPHASIS_MASK);
3379 switch (signal_levels) {
3380 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3381 return EDP_LINK_TRAIN_400MV_0DB_IVB;
3382 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3383 return EDP_LINK_TRAIN_400MV_3_5DB_IVB;
3384 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3385 return EDP_LINK_TRAIN_400MV_6DB_IVB;
3387 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3388 return EDP_LINK_TRAIN_600MV_0DB_IVB;
3389 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3390 return EDP_LINK_TRAIN_600MV_3_5DB_IVB;
3392 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3393 return EDP_LINK_TRAIN_800MV_0DB_IVB;
3394 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3395 return EDP_LINK_TRAIN_800MV_3_5DB_IVB;
3398 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3399 "0x%x\n", signal_levels);
3400 return EDP_LINK_TRAIN_500MV_0DB_IVB;
3405 intel_dp_set_signal_levels(struct intel_dp *intel_dp)
3407 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3408 enum port port = intel_dig_port->port;
3409 struct drm_device *dev = intel_dig_port->base.base.dev;
3410 struct drm_i915_private *dev_priv = to_i915(dev);
3411 uint32_t signal_levels, mask = 0;
3412 uint8_t train_set = intel_dp->train_set[0];
3414 if (HAS_DDI(dev_priv)) {
3415 signal_levels = ddi_signal_levels(intel_dp);
3417 if (IS_BROXTON(dev_priv))
3420 mask = DDI_BUF_EMP_MASK;
3421 } else if (IS_CHERRYVIEW(dev_priv)) {
3422 signal_levels = chv_signal_levels(intel_dp);
3423 } else if (IS_VALLEYVIEW(dev_priv)) {
3424 signal_levels = vlv_signal_levels(intel_dp);
3425 } else if (IS_GEN7(dev_priv) && port == PORT_A) {
3426 signal_levels = gen7_edp_signal_levels(train_set);
3427 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
3428 } else if (IS_GEN6(dev_priv) && port == PORT_A) {
3429 signal_levels = gen6_edp_signal_levels(train_set);
3430 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
3432 signal_levels = gen4_signal_levels(train_set);
3433 mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK;
3437 DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels);
3439 DRM_DEBUG_KMS("Using vswing level %d\n",
3440 train_set & DP_TRAIN_VOLTAGE_SWING_MASK);
3441 DRM_DEBUG_KMS("Using pre-emphasis level %d\n",
3442 (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) >>
3443 DP_TRAIN_PRE_EMPHASIS_SHIFT);
3445 intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels;
3447 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
3448 POSTING_READ(intel_dp->output_reg);
3452 intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
3453 uint8_t dp_train_pat)
3455 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3456 struct drm_i915_private *dev_priv =
3457 to_i915(intel_dig_port->base.base.dev);
3459 _intel_dp_set_link_train(intel_dp, &intel_dp->DP, dp_train_pat);
3461 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
3462 POSTING_READ(intel_dp->output_reg);
3465 void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
3467 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3468 struct drm_device *dev = intel_dig_port->base.base.dev;
3469 struct drm_i915_private *dev_priv = to_i915(dev);
3470 enum port port = intel_dig_port->port;
3473 if (!HAS_DDI(dev_priv))
3476 val = I915_READ(DP_TP_CTL(port));
3477 val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
3478 val |= DP_TP_CTL_LINK_TRAIN_IDLE;
3479 I915_WRITE(DP_TP_CTL(port), val);
3482 * On PORT_A we can have only eDP in SST mode. There the only reason
3483 * we need to set idle transmission mode is to work around a HW issue
3484 * where we enable the pipe while not in idle link-training mode.
3485 * In this case there is requirement to wait for a minimum number of
3486 * idle patterns to be sent.
3491 if (intel_wait_for_register(dev_priv,DP_TP_STATUS(port),
3492 DP_TP_STATUS_IDLE_DONE,
3493 DP_TP_STATUS_IDLE_DONE,
3495 DRM_ERROR("Timed out waiting for DP idle patterns\n");
3499 intel_dp_link_down(struct intel_dp *intel_dp)
3501 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3502 struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
3503 enum port port = intel_dig_port->port;
3504 struct drm_device *dev = intel_dig_port->base.base.dev;
3505 struct drm_i915_private *dev_priv = to_i915(dev);
3506 uint32_t DP = intel_dp->DP;
3508 if (WARN_ON(HAS_DDI(dev_priv)))
3511 if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0))
3514 DRM_DEBUG_KMS("\n");
3516 if ((IS_GEN7(dev_priv) && port == PORT_A) ||
3517 (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
3518 DP &= ~DP_LINK_TRAIN_MASK_CPT;
3519 DP |= DP_LINK_TRAIN_PAT_IDLE_CPT;
3521 if (IS_CHERRYVIEW(dev_priv))
3522 DP &= ~DP_LINK_TRAIN_MASK_CHV;
3524 DP &= ~DP_LINK_TRAIN_MASK;
3525 DP |= DP_LINK_TRAIN_PAT_IDLE;
3527 I915_WRITE(intel_dp->output_reg, DP);
3528 POSTING_READ(intel_dp->output_reg);
3530 DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE);
3531 I915_WRITE(intel_dp->output_reg, DP);
3532 POSTING_READ(intel_dp->output_reg);
3535 * HW workaround for IBX, we need to move the port
3536 * to transcoder A after disabling it to allow the
3537 * matching HDMI port to be enabled on transcoder A.
3539 if (HAS_PCH_IBX(dev_priv) && crtc->pipe == PIPE_B && port != PORT_A) {
3541 * We get CPU/PCH FIFO underruns on the other pipe when
3542 * doing the workaround. Sweep them under the rug.
3544 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, false);
3545 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
3547 /* always enable with pattern 1 (as per spec) */
3548 DP &= ~(DP_PIPEB_SELECT | DP_LINK_TRAIN_MASK);
3549 DP |= DP_PORT_EN | DP_LINK_TRAIN_PAT_1;
3550 I915_WRITE(intel_dp->output_reg, DP);
3551 POSTING_READ(intel_dp->output_reg);
3554 I915_WRITE(intel_dp->output_reg, DP);
3555 POSTING_READ(intel_dp->output_reg);
3557 intel_wait_for_vblank_if_active(dev_priv, PIPE_A);
3558 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, true);
3559 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
3562 msleep(intel_dp->panel_power_down_delay);
3566 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
3568 intel_dp->active_pipe = INVALID_PIPE;
3569 pps_unlock(intel_dp);
3574 intel_dp_read_dpcd(struct intel_dp *intel_dp)
3576 if (drm_dp_dpcd_read(&intel_dp->aux, 0x000, intel_dp->dpcd,
3577 sizeof(intel_dp->dpcd)) < 0)
3578 return false; /* aux transfer failed */
3580 DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp->dpcd), intel_dp->dpcd);
3582 return intel_dp->dpcd[DP_DPCD_REV] != 0;
3586 intel_edp_init_dpcd(struct intel_dp *intel_dp)
3588 struct drm_i915_private *dev_priv =
3589 to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
3591 /* this function is meant to be called only once */
3592 WARN_ON(intel_dp->dpcd[DP_DPCD_REV] != 0);
3594 if (!intel_dp_read_dpcd(intel_dp))
3597 intel_dp_read_desc(intel_dp);
3599 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
3600 dev_priv->no_aux_handshake = intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
3601 DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
3603 /* Check if the panel supports PSR */
3604 drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT,
3606 sizeof(intel_dp->psr_dpcd));
3607 if (intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED) {
3608 dev_priv->psr.sink_support = true;
3609 DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
3612 if (INTEL_GEN(dev_priv) >= 9 &&
3613 (intel_dp->psr_dpcd[0] & DP_PSR2_IS_SUPPORTED)) {
3614 uint8_t frame_sync_cap;
3616 dev_priv->psr.sink_support = true;
3617 drm_dp_dpcd_read(&intel_dp->aux,
3618 DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP,
3619 &frame_sync_cap, 1);
3620 dev_priv->psr.aux_frame_sync = frame_sync_cap ? true : false;
3621 /* PSR2 needs frame sync as well */
3622 dev_priv->psr.psr2_support = dev_priv->psr.aux_frame_sync;
3623 DRM_DEBUG_KMS("PSR2 %s on sink",
3624 dev_priv->psr.psr2_support ? "supported" : "not supported");
3627 /* Read the eDP Display control capabilities registers */
3628 if ((intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) &&
3629 drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
3630 intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) ==
3631 sizeof(intel_dp->edp_dpcd))
3632 DRM_DEBUG_KMS("EDP DPCD : %*ph\n", (int) sizeof(intel_dp->edp_dpcd),
3633 intel_dp->edp_dpcd);
3635 /* Intermediate frequency support */
3636 if (intel_dp->edp_dpcd[0] >= 0x03) { /* eDp v1.4 or higher */
3637 __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
3640 drm_dp_dpcd_read(&intel_dp->aux, DP_SUPPORTED_LINK_RATES,
3641 sink_rates, sizeof(sink_rates));
3643 for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
3644 int val = le16_to_cpu(sink_rates[i]);
3649 /* Value read multiplied by 200kHz gives the per-lane
3650 * link rate in kHz. The source rates are, however,
3651 * stored in terms of LS_Clk kHz. The full conversion
3652 * back to symbols is
3653 * (val * 200kHz)*(8/10 ch. encoding)*(1/8 bit to Byte)
3655 intel_dp->sink_rates[i] = (val * 200) / 10;
3657 intel_dp->num_sink_rates = i;
3665 intel_dp_get_dpcd(struct intel_dp *intel_dp)
3667 if (!intel_dp_read_dpcd(intel_dp))
3670 if (drm_dp_dpcd_read(&intel_dp->aux, DP_SINK_COUNT,
3671 &intel_dp->sink_count, 1) < 0)
3675 * Sink count can change between short pulse hpd hence
3676 * a member variable in intel_dp will track any changes
3677 * between short pulse interrupts.
3679 intel_dp->sink_count = DP_GET_SINK_COUNT(intel_dp->sink_count);
3682 * SINK_COUNT == 0 and DOWNSTREAM_PORT_PRESENT == 1 implies that
3683 * a dongle is present but no display. Unless we require to know
3684 * if a dongle is present or not, we don't need to update
3685 * downstream port information. So, an early return here saves
3686 * time from performing other operations which are not required.
3688 if (!is_edp(intel_dp) && !intel_dp->sink_count)
3691 if (!drm_dp_is_branch(intel_dp->dpcd))
3692 return true; /* native DP sink */
3694 if (intel_dp->dpcd[DP_DPCD_REV] == 0x10)
3695 return true; /* no per-port downstream info */
3697 if (drm_dp_dpcd_read(&intel_dp->aux, DP_DOWNSTREAM_PORT_0,
3698 intel_dp->downstream_ports,
3699 DP_MAX_DOWNSTREAM_PORTS) < 0)
3700 return false; /* downstream port status fetch failed */
3706 intel_dp_can_mst(struct intel_dp *intel_dp)
3710 if (!i915.enable_dp_mst)
3713 if (!intel_dp->can_mst)
3716 if (intel_dp->dpcd[DP_DPCD_REV] < 0x12)
3719 if (drm_dp_dpcd_read(&intel_dp->aux, DP_MSTM_CAP, buf, 1) != 1)
3722 return buf[0] & DP_MST_CAP;
3726 intel_dp_configure_mst(struct intel_dp *intel_dp)
3728 if (!i915.enable_dp_mst)
3731 if (!intel_dp->can_mst)
3734 intel_dp->is_mst = intel_dp_can_mst(intel_dp);
3736 if (intel_dp->is_mst)
3737 DRM_DEBUG_KMS("Sink is MST capable\n");
3739 DRM_DEBUG_KMS("Sink is not MST capable\n");
3741 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
3745 static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp)
3747 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3748 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
3749 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3755 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
3756 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
3761 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
3762 buf & ~DP_TEST_SINK_START) < 0) {
3763 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
3769 intel_wait_for_vblank(dev_priv, intel_crtc->pipe);
3771 if (drm_dp_dpcd_readb(&intel_dp->aux,
3772 DP_TEST_SINK_MISC, &buf) < 0) {
3776 count = buf & DP_TEST_COUNT_MASK;
3777 } while (--attempts && count);
3779 if (attempts == 0) {
3780 DRM_DEBUG_KMS("TIMEOUT: Sink CRC counter is not zeroed after calculation is stopped\n");
3785 hsw_enable_ips(intel_crtc);
3789 static int intel_dp_sink_crc_start(struct intel_dp *intel_dp)
3791 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3792 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
3793 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3797 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
3800 if (!(buf & DP_TEST_CRC_SUPPORTED))
3803 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
3806 if (buf & DP_TEST_SINK_START) {
3807 ret = intel_dp_sink_crc_stop(intel_dp);
3812 hsw_disable_ips(intel_crtc);
3814 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
3815 buf | DP_TEST_SINK_START) < 0) {
3816 hsw_enable_ips(intel_crtc);
3820 intel_wait_for_vblank(dev_priv, intel_crtc->pipe);
3824 int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
3826 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3827 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
3828 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3833 ret = intel_dp_sink_crc_start(intel_dp);
3838 intel_wait_for_vblank(dev_priv, intel_crtc->pipe);
3840 if (drm_dp_dpcd_readb(&intel_dp->aux,
3841 DP_TEST_SINK_MISC, &buf) < 0) {
3845 count = buf & DP_TEST_COUNT_MASK;
3847 } while (--attempts && count == 0);
3849 if (attempts == 0) {
3850 DRM_ERROR("Panel is unable to calculate any CRC after 6 vblanks\n");
3855 if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0) {
3861 intel_dp_sink_crc_stop(intel_dp);
3866 intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector)
3868 return drm_dp_dpcd_read(&intel_dp->aux,
3869 DP_DEVICE_SERVICE_IRQ_VECTOR,
3870 sink_irq_vector, 1) == 1;
3874 intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *sink_irq_vector)
3878 ret = drm_dp_dpcd_read(&intel_dp->aux,
3880 sink_irq_vector, 14);
3887 static uint8_t intel_dp_autotest_link_training(struct intel_dp *intel_dp)
3889 uint8_t test_result = DP_TEST_ACK;
3893 static uint8_t intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
3895 uint8_t test_result = DP_TEST_NAK;
3899 static uint8_t intel_dp_autotest_edid(struct intel_dp *intel_dp)
3901 uint8_t test_result = DP_TEST_NAK;
3902 struct intel_connector *intel_connector = intel_dp->attached_connector;
3903 struct drm_connector *connector = &intel_connector->base;
3905 if (intel_connector->detect_edid == NULL ||
3906 connector->edid_corrupt ||
3907 intel_dp->aux.i2c_defer_count > 6) {
3908 /* Check EDID read for NACKs, DEFERs and corruption
3909 * (DP CTS 1.2 Core r1.1)
3910 * 4.2.2.4 : Failed EDID read, I2C_NAK
3911 * 4.2.2.5 : Failed EDID read, I2C_DEFER
3912 * 4.2.2.6 : EDID corruption detected
3913 * Use failsafe mode for all cases
3915 if (intel_dp->aux.i2c_nack_count > 0 ||
3916 intel_dp->aux.i2c_defer_count > 0)
3917 DRM_DEBUG_KMS("EDID read had %d NACKs, %d DEFERs\n",
3918 intel_dp->aux.i2c_nack_count,
3919 intel_dp->aux.i2c_defer_count);
3920 intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_FAILSAFE;
3922 struct edid *block = intel_connector->detect_edid;
3924 /* We have to write the checksum
3925 * of the last block read
3927 block += intel_connector->detect_edid->extensions;
3929 if (!drm_dp_dpcd_write(&intel_dp->aux,
3930 DP_TEST_EDID_CHECKSUM,
3933 DRM_DEBUG_KMS("Failed to write EDID checksum\n");
3935 test_result = DP_TEST_ACK | DP_TEST_EDID_CHECKSUM_WRITE;
3936 intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_STANDARD;
3939 /* Set test active flag here so userspace doesn't interrupt things */
3940 intel_dp->compliance.test_active = 1;
3945 static uint8_t intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
3947 uint8_t test_result = DP_TEST_NAK;
3951 static void intel_dp_handle_test_request(struct intel_dp *intel_dp)
3953 uint8_t response = DP_TEST_NAK;
3957 status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_REQUEST, &rxdata, 1);
3959 DRM_DEBUG_KMS("Could not read test request from sink\n");
3964 case DP_TEST_LINK_TRAINING:
3965 DRM_DEBUG_KMS("LINK_TRAINING test requested\n");
3966 intel_dp->compliance.test_type = DP_TEST_LINK_TRAINING;
3967 response = intel_dp_autotest_link_training(intel_dp);
3969 case DP_TEST_LINK_VIDEO_PATTERN:
3970 DRM_DEBUG_KMS("TEST_PATTERN test requested\n");
3971 intel_dp->compliance.test_type = DP_TEST_LINK_VIDEO_PATTERN;
3972 response = intel_dp_autotest_video_pattern(intel_dp);
3974 case DP_TEST_LINK_EDID_READ:
3975 DRM_DEBUG_KMS("EDID test requested\n");
3976 intel_dp->compliance.test_type = DP_TEST_LINK_EDID_READ;
3977 response = intel_dp_autotest_edid(intel_dp);
3979 case DP_TEST_LINK_PHY_TEST_PATTERN:
3980 DRM_DEBUG_KMS("PHY_PATTERN test requested\n");
3981 intel_dp->compliance.test_type = DP_TEST_LINK_PHY_TEST_PATTERN;
3982 response = intel_dp_autotest_phy_pattern(intel_dp);
3985 DRM_DEBUG_KMS("Invalid test request '%02x'\n", rxdata);
3990 status = drm_dp_dpcd_write(&intel_dp->aux,
3994 DRM_DEBUG_KMS("Could not write test response to sink\n");
3998 intel_dp_check_mst_status(struct intel_dp *intel_dp)
4002 if (intel_dp->is_mst) {
4007 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
4011 /* check link status - esi[10] = 0x200c */
4012 if (intel_dp->active_mst_links &&
4013 !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
4014 DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
4015 intel_dp_start_link_train(intel_dp);
4016 intel_dp_stop_link_train(intel_dp);
4019 DRM_DEBUG_KMS("got esi %3ph\n", esi);
4020 ret = drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
4023 for (retry = 0; retry < 3; retry++) {
4025 wret = drm_dp_dpcd_write(&intel_dp->aux,
4026 DP_SINK_COUNT_ESI+1,
4033 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
4035 DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
4043 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4044 DRM_DEBUG_KMS("failed to get ESI - device may have failed\n");
4045 intel_dp->is_mst = false;
4046 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
4047 /* send a hotplug event */
4048 drm_kms_helper_hotplug_event(intel_dig_port->base.base.dev);
4055 intel_dp_retrain_link(struct intel_dp *intel_dp)
4057 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
4058 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
4059 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
4061 /* Suppress underruns caused by re-training */
4062 intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, false);
4063 if (crtc->config->has_pch_encoder)
4064 intel_set_pch_fifo_underrun_reporting(dev_priv,
4065 intel_crtc_pch_transcoder(crtc), false);
4067 intel_dp_start_link_train(intel_dp);
4068 intel_dp_stop_link_train(intel_dp);
4070 /* Keep underrun reporting disabled until things are stable */
4071 intel_wait_for_vblank(dev_priv, crtc->pipe);
4073 intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
4074 if (crtc->config->has_pch_encoder)
4075 intel_set_pch_fifo_underrun_reporting(dev_priv,
4076 intel_crtc_pch_transcoder(crtc), true);
4080 intel_dp_check_link_status(struct intel_dp *intel_dp)
4082 struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
4083 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4084 u8 link_status[DP_LINK_STATUS_SIZE];
4086 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
4088 if (!intel_dp_get_link_status(intel_dp, link_status)) {
4089 DRM_ERROR("Failed to get link status\n");
4093 if (!intel_encoder->base.crtc)
4096 if (!to_intel_crtc(intel_encoder->base.crtc)->active)
4099 /* FIXME: we need to synchronize this sort of stuff with hardware
4100 * readout. Currently fast link training doesn't work on boot-up. */
4101 if (!intel_dp->lane_count)
4104 /* if link training is requested we should perform it always */
4105 if ((intel_dp->compliance.test_type == DP_TEST_LINK_TRAINING) ||
4106 (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count))) {
4107 DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
4108 intel_encoder->base.name);
4110 intel_dp_retrain_link(intel_dp);
4115 * According to DP spec
4118 * 2. Configure link according to Receiver Capabilities
4119 * 3. Use Link Training from 2.5.3.3 and 3.5.1.3
4120 * 4. Check link status on receipt of hot-plug interrupt
4122 * intel_dp_short_pulse - handles short pulse interrupts
4123 * when full detection is not required.
4124 * Returns %true if short pulse is handled and full detection
4125 * is NOT required and %false otherwise.
4128 intel_dp_short_pulse(struct intel_dp *intel_dp)
4130 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4131 u8 sink_irq_vector = 0;
4132 u8 old_sink_count = intel_dp->sink_count;
4136 * Clearing compliance test variables to allow capturing
4137 * of values for next automated test request.
4139 memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
4142 * Now read the DPCD to see if it's actually running
4143 * If the current value of sink count doesn't match with
4144 * the value that was stored earlier or dpcd read failed
4145 * we need to do full detection
4147 ret = intel_dp_get_dpcd(intel_dp);
4149 if ((old_sink_count != intel_dp->sink_count) || !ret) {
4150 /* No need to proceed if we are going to do full detect */
4154 /* Try to read the source of the interrupt */
4155 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4156 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector) &&
4157 sink_irq_vector != 0) {
4158 /* Clear interrupt source */
4159 drm_dp_dpcd_writeb(&intel_dp->aux,
4160 DP_DEVICE_SERVICE_IRQ_VECTOR,
4163 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
4164 DRM_DEBUG_DRIVER("Test request in short pulse not handled\n");
4165 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
4166 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4169 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
4170 intel_dp_check_link_status(intel_dp);
4171 drm_modeset_unlock(&dev->mode_config.connection_mutex);
4176 /* XXX this is probably wrong for multiple downstream ports */
4177 static enum drm_connector_status
4178 intel_dp_detect_dpcd(struct intel_dp *intel_dp)
4180 uint8_t *dpcd = intel_dp->dpcd;
4183 if (!intel_dp_get_dpcd(intel_dp))
4184 return connector_status_disconnected;
4186 if (is_edp(intel_dp))
4187 return connector_status_connected;
4189 /* if there's no downstream port, we're done */
4190 if (!drm_dp_is_branch(dpcd))
4191 return connector_status_connected;
4193 /* If we're HPD-aware, SINK_COUNT changes dynamically */
4194 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4195 intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
4197 return intel_dp->sink_count ?
4198 connector_status_connected : connector_status_disconnected;
4201 if (intel_dp_can_mst(intel_dp))
4202 return connector_status_connected;
4204 /* If no HPD, poke DDC gently */
4205 if (drm_probe_ddc(&intel_dp->aux.ddc))
4206 return connector_status_connected;
4208 /* Well we tried, say unknown for unreliable port types */
4209 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
4210 type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
4211 if (type == DP_DS_PORT_TYPE_VGA ||
4212 type == DP_DS_PORT_TYPE_NON_EDID)
4213 return connector_status_unknown;
4215 type = intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
4216 DP_DWN_STRM_PORT_TYPE_MASK;
4217 if (type == DP_DWN_STRM_PORT_TYPE_ANALOG ||
4218 type == DP_DWN_STRM_PORT_TYPE_OTHER)
4219 return connector_status_unknown;
4222 /* Anything else is out of spec, warn and ignore */
4223 DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
4224 return connector_status_disconnected;
4227 static enum drm_connector_status
4228 edp_detect(struct intel_dp *intel_dp)
4230 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4231 struct drm_i915_private *dev_priv = to_i915(dev);
4232 enum drm_connector_status status;
4234 status = intel_panel_detect(dev_priv);
4235 if (status == connector_status_unknown)
4236 status = connector_status_connected;
4241 static bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
4242 struct intel_digital_port *port)
4246 switch (port->port) {
4250 bit = SDE_PORTB_HOTPLUG;
4253 bit = SDE_PORTC_HOTPLUG;
4256 bit = SDE_PORTD_HOTPLUG;
4259 MISSING_CASE(port->port);
4263 return I915_READ(SDEISR) & bit;
4266 static bool cpt_digital_port_connected(struct drm_i915_private *dev_priv,
4267 struct intel_digital_port *port)
4271 switch (port->port) {
4275 bit = SDE_PORTB_HOTPLUG_CPT;
4278 bit = SDE_PORTC_HOTPLUG_CPT;
4281 bit = SDE_PORTD_HOTPLUG_CPT;
4284 bit = SDE_PORTE_HOTPLUG_SPT;
4287 MISSING_CASE(port->port);
4291 return I915_READ(SDEISR) & bit;
4294 static bool g4x_digital_port_connected(struct drm_i915_private *dev_priv,
4295 struct intel_digital_port *port)
4299 switch (port->port) {
4301 bit = PORTB_HOTPLUG_LIVE_STATUS_G4X;
4304 bit = PORTC_HOTPLUG_LIVE_STATUS_G4X;
4307 bit = PORTD_HOTPLUG_LIVE_STATUS_G4X;
4310 MISSING_CASE(port->port);
4314 return I915_READ(PORT_HOTPLUG_STAT) & bit;
4317 static bool gm45_digital_port_connected(struct drm_i915_private *dev_priv,
4318 struct intel_digital_port *port)
4322 switch (port->port) {
4324 bit = PORTB_HOTPLUG_LIVE_STATUS_GM45;
4327 bit = PORTC_HOTPLUG_LIVE_STATUS_GM45;
4330 bit = PORTD_HOTPLUG_LIVE_STATUS_GM45;
4333 MISSING_CASE(port->port);
4337 return I915_READ(PORT_HOTPLUG_STAT) & bit;
4340 static bool bxt_digital_port_connected(struct drm_i915_private *dev_priv,
4341 struct intel_digital_port *intel_dig_port)
4343 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4347 intel_hpd_pin_to_port(intel_encoder->hpd_pin, &port);
4350 bit = BXT_DE_PORT_HP_DDIA;
4353 bit = BXT_DE_PORT_HP_DDIB;
4356 bit = BXT_DE_PORT_HP_DDIC;
4363 return I915_READ(GEN8_DE_PORT_ISR) & bit;
4367 * intel_digital_port_connected - is the specified port connected?
4368 * @dev_priv: i915 private structure
4369 * @port: the port to test
4371 * Return %true if @port is connected, %false otherwise.
4373 static bool intel_digital_port_connected(struct drm_i915_private *dev_priv,
4374 struct intel_digital_port *port)
4376 if (HAS_PCH_IBX(dev_priv))
4377 return ibx_digital_port_connected(dev_priv, port);
4378 else if (HAS_PCH_SPLIT(dev_priv))
4379 return cpt_digital_port_connected(dev_priv, port);
4380 else if (IS_GEN9_LP(dev_priv))
4381 return bxt_digital_port_connected(dev_priv, port);
4382 else if (IS_GM45(dev_priv))
4383 return gm45_digital_port_connected(dev_priv, port);
4385 return g4x_digital_port_connected(dev_priv, port);
4388 static struct edid *
4389 intel_dp_get_edid(struct intel_dp *intel_dp)
4391 struct intel_connector *intel_connector = intel_dp->attached_connector;
4393 /* use cached edid if we have one */
4394 if (intel_connector->edid) {
4396 if (IS_ERR(intel_connector->edid))
4399 return drm_edid_duplicate(intel_connector->edid);
4401 return drm_get_edid(&intel_connector->base,
4402 &intel_dp->aux.ddc);
4406 intel_dp_set_edid(struct intel_dp *intel_dp)
4408 struct intel_connector *intel_connector = intel_dp->attached_connector;
4411 intel_dp_unset_edid(intel_dp);
4412 edid = intel_dp_get_edid(intel_dp);
4413 intel_connector->detect_edid = edid;
4415 if (intel_dp->force_audio != HDMI_AUDIO_AUTO)
4416 intel_dp->has_audio = intel_dp->force_audio == HDMI_AUDIO_ON;
4418 intel_dp->has_audio = drm_detect_monitor_audio(edid);
4422 intel_dp_unset_edid(struct intel_dp *intel_dp)
4424 struct intel_connector *intel_connector = intel_dp->attached_connector;
4426 kfree(intel_connector->detect_edid);
4427 intel_connector->detect_edid = NULL;
4429 intel_dp->has_audio = false;
4432 static enum drm_connector_status
4433 intel_dp_long_pulse(struct intel_connector *intel_connector)
4435 struct drm_connector *connector = &intel_connector->base;
4436 struct intel_dp *intel_dp = intel_attached_dp(connector);
4437 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4438 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4439 struct drm_device *dev = connector->dev;
4440 enum drm_connector_status status;
4441 enum intel_display_power_domain power_domain;
4442 u8 sink_irq_vector = 0;
4444 power_domain = intel_display_port_aux_power_domain(intel_encoder);
4445 intel_display_power_get(to_i915(dev), power_domain);
4447 /* Can't disconnect eDP, but you can close the lid... */
4448 if (is_edp(intel_dp))
4449 status = edp_detect(intel_dp);
4450 else if (intel_digital_port_connected(to_i915(dev),
4451 dp_to_dig_port(intel_dp)))
4452 status = intel_dp_detect_dpcd(intel_dp);
4454 status = connector_status_disconnected;
4456 if (status == connector_status_disconnected) {
4457 memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
4459 if (intel_dp->is_mst) {
4460 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
4462 intel_dp->mst_mgr.mst_state);
4463 intel_dp->is_mst = false;
4464 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
4471 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4472 intel_encoder->type = INTEL_OUTPUT_DP;
4474 DRM_DEBUG_KMS("Display Port TPS3 support: source %s, sink %s\n",
4475 yesno(intel_dp_source_supports_hbr2(intel_dp)),
4476 yesno(drm_dp_tps3_supported(intel_dp->dpcd)));
4478 /* Set the max lane count for sink */
4479 intel_dp->max_sink_lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
4481 /* Set the max link BW for sink */
4482 intel_dp->max_sink_link_bw = intel_dp_max_link_bw(intel_dp);
4484 intel_dp_print_rates(intel_dp);
4486 intel_dp_read_desc(intel_dp);
4488 intel_dp_configure_mst(intel_dp);
4490 if (intel_dp->is_mst) {
4492 * If we are in MST mode then this connector
4493 * won't appear connected or have anything
4496 status = connector_status_disconnected;
4498 } else if (connector->status == connector_status_connected) {
4500 * If display was connected already and is still connected
4501 * check links status, there has been known issues of
4502 * link loss triggerring long pulse!!!!
4504 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
4505 intel_dp_check_link_status(intel_dp);
4506 drm_modeset_unlock(&dev->mode_config.connection_mutex);
4511 * Clearing NACK and defer counts to get their exact values
4512 * while reading EDID which are required by Compliance tests
4513 * 4.2.2.4 and 4.2.2.5
4515 intel_dp->aux.i2c_nack_count = 0;
4516 intel_dp->aux.i2c_defer_count = 0;
4518 intel_dp_set_edid(intel_dp);
4519 if (is_edp(intel_dp) || intel_connector->detect_edid)
4520 status = connector_status_connected;
4521 intel_dp->detect_done = true;
4523 /* Try to read the source of the interrupt */
4524 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4525 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector) &&
4526 sink_irq_vector != 0) {
4527 /* Clear interrupt source */
4528 drm_dp_dpcd_writeb(&intel_dp->aux,
4529 DP_DEVICE_SERVICE_IRQ_VECTOR,
4532 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
4533 intel_dp_handle_test_request(intel_dp);
4534 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
4535 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4539 if (status != connector_status_connected && !intel_dp->is_mst)
4540 intel_dp_unset_edid(intel_dp);
4542 intel_display_power_put(to_i915(dev), power_domain);
4546 static enum drm_connector_status
4547 intel_dp_detect(struct drm_connector *connector, bool force)
4549 struct intel_dp *intel_dp = intel_attached_dp(connector);
4550 enum drm_connector_status status = connector->status;
4552 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4553 connector->base.id, connector->name);
4555 /* If full detect is not performed yet, do a full detect */
4556 if (!intel_dp->detect_done)
4557 status = intel_dp_long_pulse(intel_dp->attached_connector);
4559 intel_dp->detect_done = false;
4565 intel_dp_force(struct drm_connector *connector)
4567 struct intel_dp *intel_dp = intel_attached_dp(connector);
4568 struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
4569 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
4570 enum intel_display_power_domain power_domain;
4572 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4573 connector->base.id, connector->name);
4574 intel_dp_unset_edid(intel_dp);
4576 if (connector->status != connector_status_connected)
4579 power_domain = intel_display_port_aux_power_domain(intel_encoder);
4580 intel_display_power_get(dev_priv, power_domain);
4582 intel_dp_set_edid(intel_dp);
4584 intel_display_power_put(dev_priv, power_domain);
4586 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4587 intel_encoder->type = INTEL_OUTPUT_DP;
4590 static int intel_dp_get_modes(struct drm_connector *connector)
4592 struct intel_connector *intel_connector = to_intel_connector(connector);
4595 edid = intel_connector->detect_edid;
4597 int ret = intel_connector_update_modes(connector, edid);
4602 /* if eDP has no EDID, fall back to fixed mode */
4603 if (is_edp(intel_attached_dp(connector)) &&
4604 intel_connector->panel.fixed_mode) {
4605 struct drm_display_mode *mode;
4607 mode = drm_mode_duplicate(connector->dev,
4608 intel_connector->panel.fixed_mode);
4610 drm_mode_probed_add(connector, mode);
4619 intel_dp_detect_audio(struct drm_connector *connector)
4621 bool has_audio = false;
4624 edid = to_intel_connector(connector)->detect_edid;
4626 has_audio = drm_detect_monitor_audio(edid);
4632 intel_dp_set_property(struct drm_connector *connector,
4633 struct drm_property *property,
4636 struct drm_i915_private *dev_priv = to_i915(connector->dev);
4637 struct intel_connector *intel_connector = to_intel_connector(connector);
4638 struct intel_encoder *intel_encoder = intel_attached_encoder(connector);
4639 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
4642 ret = drm_object_property_set_value(&connector->base, property, val);
4646 if (property == dev_priv->force_audio_property) {
4650 if (i == intel_dp->force_audio)
4653 intel_dp->force_audio = i;
4655 if (i == HDMI_AUDIO_AUTO)
4656 has_audio = intel_dp_detect_audio(connector);
4658 has_audio = (i == HDMI_AUDIO_ON);
4660 if (has_audio == intel_dp->has_audio)
4663 intel_dp->has_audio = has_audio;
4667 if (property == dev_priv->broadcast_rgb_property) {
4668 bool old_auto = intel_dp->color_range_auto;
4669 bool old_range = intel_dp->limited_color_range;
4672 case INTEL_BROADCAST_RGB_AUTO:
4673 intel_dp->color_range_auto = true;
4675 case INTEL_BROADCAST_RGB_FULL:
4676 intel_dp->color_range_auto = false;
4677 intel_dp->limited_color_range = false;
4679 case INTEL_BROADCAST_RGB_LIMITED:
4680 intel_dp->color_range_auto = false;
4681 intel_dp->limited_color_range = true;
4687 if (old_auto == intel_dp->color_range_auto &&
4688 old_range == intel_dp->limited_color_range)
4694 if (is_edp(intel_dp) &&
4695 property == connector->dev->mode_config.scaling_mode_property) {
4696 if (val == DRM_MODE_SCALE_NONE) {
4697 DRM_DEBUG_KMS("no scaling not supported\n");
4700 if (HAS_GMCH_DISPLAY(dev_priv) &&
4701 val == DRM_MODE_SCALE_CENTER) {
4702 DRM_DEBUG_KMS("centering not supported\n");
4706 if (intel_connector->panel.fitting_mode == val) {
4707 /* the eDP scaling property is not changed */
4710 intel_connector->panel.fitting_mode = val;
4718 if (intel_encoder->base.crtc)
4719 intel_crtc_restore_mode(intel_encoder->base.crtc);
4725 intel_dp_connector_register(struct drm_connector *connector)
4727 struct intel_dp *intel_dp = intel_attached_dp(connector);
4730 ret = intel_connector_register(connector);
4734 i915_debugfs_connector_add(connector);
4736 DRM_DEBUG_KMS("registering %s bus for %s\n",
4737 intel_dp->aux.name, connector->kdev->kobj.name);
4739 intel_dp->aux.dev = connector->kdev;
4740 return drm_dp_aux_register(&intel_dp->aux);
4744 intel_dp_connector_unregister(struct drm_connector *connector)
4746 drm_dp_aux_unregister(&intel_attached_dp(connector)->aux);
4747 intel_connector_unregister(connector);
4751 intel_dp_connector_destroy(struct drm_connector *connector)
4753 struct intel_connector *intel_connector = to_intel_connector(connector);
4755 kfree(intel_connector->detect_edid);
4757 if (!IS_ERR_OR_NULL(intel_connector->edid))
4758 kfree(intel_connector->edid);
4760 /* Can't call is_edp() since the encoder may have been destroyed
4762 if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
4763 intel_panel_fini(&intel_connector->panel);
4765 drm_connector_cleanup(connector);
4769 void intel_dp_encoder_destroy(struct drm_encoder *encoder)
4771 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
4772 struct intel_dp *intel_dp = &intel_dig_port->dp;
4774 intel_dp_mst_encoder_cleanup(intel_dig_port);
4775 if (is_edp(intel_dp)) {
4776 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
4778 * vdd might still be enabled do to the delayed vdd off.
4779 * Make sure vdd is actually turned off here.
4782 edp_panel_vdd_off_sync(intel_dp);
4783 pps_unlock(intel_dp);
4785 if (intel_dp->edp_notifier.notifier_call) {
4786 unregister_reboot_notifier(&intel_dp->edp_notifier);
4787 intel_dp->edp_notifier.notifier_call = NULL;
4791 intel_dp_aux_fini(intel_dp);
4793 drm_encoder_cleanup(encoder);
4794 kfree(intel_dig_port);
4797 void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
4799 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
4801 if (!is_edp(intel_dp))
4805 * vdd might still be enabled do to the delayed vdd off.
4806 * Make sure vdd is actually turned off here.
4808 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
4810 edp_panel_vdd_off_sync(intel_dp);
4811 pps_unlock(intel_dp);
4814 static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
4816 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4817 struct drm_device *dev = intel_dig_port->base.base.dev;
4818 struct drm_i915_private *dev_priv = to_i915(dev);
4819 enum intel_display_power_domain power_domain;
4821 lockdep_assert_held(&dev_priv->pps_mutex);
4823 if (!edp_have_panel_vdd(intel_dp))
4827 * The VDD bit needs a power domain reference, so if the bit is
4828 * already enabled when we boot or resume, grab this reference and
4829 * schedule a vdd off, so we don't hold on to the reference
4832 DRM_DEBUG_KMS("VDD left on by BIOS, adjusting state tracking\n");
4833 power_domain = intel_display_port_aux_power_domain(&intel_dig_port->base);
4834 intel_display_power_get(dev_priv, power_domain);
4836 edp_panel_vdd_schedule_off(intel_dp);
4839 static enum pipe vlv_active_pipe(struct intel_dp *intel_dp)
4841 struct drm_i915_private *dev_priv = to_i915(intel_dp_to_dev(intel_dp));
4843 if ((intel_dp->DP & DP_PORT_EN) == 0)
4844 return INVALID_PIPE;
4846 if (IS_CHERRYVIEW(dev_priv))
4847 return DP_PORT_TO_PIPE_CHV(intel_dp->DP);
4849 return PORT_TO_PIPE(intel_dp->DP);
4852 void intel_dp_encoder_reset(struct drm_encoder *encoder)
4854 struct drm_i915_private *dev_priv = to_i915(encoder->dev);
4855 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
4856 struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
4858 if (!HAS_DDI(dev_priv))
4859 intel_dp->DP = I915_READ(intel_dp->output_reg);
4862 lspcon_resume(lspcon);
4866 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
4867 intel_dp->active_pipe = vlv_active_pipe(intel_dp);
4869 if (is_edp(intel_dp)) {
4870 /* Reinit the power sequencer, in case BIOS did something with it. */
4871 intel_dp_pps_init(encoder->dev, intel_dp);
4872 intel_edp_panel_vdd_sanitize(intel_dp);
4875 pps_unlock(intel_dp);
4878 static const struct drm_connector_funcs intel_dp_connector_funcs = {
4879 .dpms = drm_atomic_helper_connector_dpms,
4880 .detect = intel_dp_detect,
4881 .force = intel_dp_force,
4882 .fill_modes = drm_helper_probe_single_connector_modes,
4883 .set_property = intel_dp_set_property,
4884 .atomic_get_property = intel_connector_atomic_get_property,
4885 .late_register = intel_dp_connector_register,
4886 .early_unregister = intel_dp_connector_unregister,
4887 .destroy = intel_dp_connector_destroy,
4888 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
4889 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
4892 static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
4893 .get_modes = intel_dp_get_modes,
4894 .mode_valid = intel_dp_mode_valid,
4897 static const struct drm_encoder_funcs intel_dp_enc_funcs = {
4898 .reset = intel_dp_encoder_reset,
4899 .destroy = intel_dp_encoder_destroy,
4903 intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
4905 struct intel_dp *intel_dp = &intel_dig_port->dp;
4906 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4907 struct drm_device *dev = intel_dig_port->base.base.dev;
4908 struct drm_i915_private *dev_priv = to_i915(dev);
4909 enum intel_display_power_domain power_domain;
4910 enum irqreturn ret = IRQ_NONE;
4912 if (intel_dig_port->base.type != INTEL_OUTPUT_EDP &&
4913 intel_dig_port->base.type != INTEL_OUTPUT_HDMI)
4914 intel_dig_port->base.type = INTEL_OUTPUT_DP;
4916 if (long_hpd && intel_dig_port->base.type == INTEL_OUTPUT_EDP) {
4918 * vdd off can generate a long pulse on eDP which
4919 * would require vdd on to handle it, and thus we
4920 * would end up in an endless cycle of
4921 * "vdd off -> long hpd -> vdd on -> detect -> vdd off -> ..."
4923 DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
4924 port_name(intel_dig_port->port));
4928 DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
4929 port_name(intel_dig_port->port),
4930 long_hpd ? "long" : "short");
4933 intel_dp->detect_done = false;
4937 power_domain = intel_display_port_aux_power_domain(intel_encoder);
4938 intel_display_power_get(dev_priv, power_domain);
4940 if (intel_dp->is_mst) {
4941 if (intel_dp_check_mst_status(intel_dp) == -EINVAL) {
4943 * If we were in MST mode, and device is not
4944 * there, get out of MST mode
4946 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
4947 intel_dp->is_mst, intel_dp->mst_mgr.mst_state);
4948 intel_dp->is_mst = false;
4949 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
4951 intel_dp->detect_done = false;
4956 if (!intel_dp->is_mst) {
4957 if (!intel_dp_short_pulse(intel_dp)) {
4958 intel_dp->detect_done = false;
4966 intel_display_power_put(dev_priv, power_domain);
4971 /* check the VBT to see whether the eDP is on another port */
4972 bool intel_dp_is_edp(struct drm_i915_private *dev_priv, enum port port)
4975 * eDP not supported on g4x. so bail out early just
4976 * for a bit extra safety in case the VBT is bonkers.
4978 if (INTEL_GEN(dev_priv) < 5)
4981 if (INTEL_GEN(dev_priv) < 9 && port == PORT_A)
4984 return intel_bios_is_port_edp(dev_priv, port);
4988 intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
4990 struct intel_connector *intel_connector = to_intel_connector(connector);
4992 intel_attach_force_audio_property(connector);
4993 intel_attach_broadcast_rgb_property(connector);
4994 intel_dp->color_range_auto = true;
4996 if (is_edp(intel_dp)) {
4997 drm_mode_create_scaling_mode_property(connector->dev);
4998 drm_object_attach_property(
5000 connector->dev->mode_config.scaling_mode_property,
5001 DRM_MODE_SCALE_ASPECT);
5002 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
5006 static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
5008 intel_dp->panel_power_off_time = ktime_get_boottime();
5009 intel_dp->last_power_on = jiffies;
5010 intel_dp->last_backlight_off = jiffies;
5014 intel_pps_readout_hw_state(struct drm_i915_private *dev_priv,
5015 struct intel_dp *intel_dp, struct edp_power_seq *seq)
5017 u32 pp_on, pp_off, pp_div = 0, pp_ctl = 0;
5018 struct pps_registers regs;
5020 intel_pps_get_registers(dev_priv, intel_dp, ®s);
5022 /* Workaround: Need to write PP_CONTROL with the unlock key as
5023 * the very first thing. */
5024 pp_ctl = ironlake_get_pp_control(intel_dp);
5026 pp_on = I915_READ(regs.pp_on);
5027 pp_off = I915_READ(regs.pp_off);
5028 if (!IS_GEN9_LP(dev_priv)) {
5029 I915_WRITE(regs.pp_ctrl, pp_ctl);
5030 pp_div = I915_READ(regs.pp_div);
5033 /* Pull timing values out of registers */
5034 seq->t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
5035 PANEL_POWER_UP_DELAY_SHIFT;
5037 seq->t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >>
5038 PANEL_LIGHT_ON_DELAY_SHIFT;
5040 seq->t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >>
5041 PANEL_LIGHT_OFF_DELAY_SHIFT;
5043 seq->t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
5044 PANEL_POWER_DOWN_DELAY_SHIFT;
5046 if (IS_GEN9_LP(dev_priv)) {
5047 u16 tmp = (pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >>
5048 BXT_POWER_CYCLE_DELAY_SHIFT;
5050 seq->t11_t12 = (tmp - 1) * 1000;
5054 seq->t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
5055 PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
5060 intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
5062 DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
5064 seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
5068 intel_pps_verify_state(struct drm_i915_private *dev_priv,
5069 struct intel_dp *intel_dp)
5071 struct edp_power_seq hw;
5072 struct edp_power_seq *sw = &intel_dp->pps_delays;
5074 intel_pps_readout_hw_state(dev_priv, intel_dp, &hw);
5076 if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
5077 hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
5078 DRM_ERROR("PPS state mismatch\n");
5079 intel_pps_dump_state("sw", sw);
5080 intel_pps_dump_state("hw", &hw);
5085 intel_dp_init_panel_power_sequencer(struct drm_device *dev,
5086 struct intel_dp *intel_dp)
5088 struct drm_i915_private *dev_priv = to_i915(dev);
5089 struct edp_power_seq cur, vbt, spec,
5090 *final = &intel_dp->pps_delays;
5092 lockdep_assert_held(&dev_priv->pps_mutex);
5094 /* already initialized? */
5095 if (final->t11_t12 != 0)
5098 intel_pps_readout_hw_state(dev_priv, intel_dp, &cur);
5100 intel_pps_dump_state("cur", &cur);
5102 vbt = dev_priv->vbt.edp.pps;
5104 /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
5105 * our hw here, which are all in 100usec. */
5106 spec.t1_t3 = 210 * 10;
5107 spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
5108 spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
5109 spec.t10 = 500 * 10;
5110 /* This one is special and actually in units of 100ms, but zero
5111 * based in the hw (so we need to add 100 ms). But the sw vbt
5112 * table multiplies it with 1000 to make it in units of 100usec,
5114 spec.t11_t12 = (510 + 100) * 10;
5116 intel_pps_dump_state("vbt", &vbt);
5118 /* Use the max of the register settings and vbt. If both are
5119 * unset, fall back to the spec limits. */
5120 #define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
5122 max(cur.field, vbt.field))
5123 assign_final(t1_t3);
5127 assign_final(t11_t12);
5130 #define get_delay(field) (DIV_ROUND_UP(final->field, 10))
5131 intel_dp->panel_power_up_delay = get_delay(t1_t3);
5132 intel_dp->backlight_on_delay = get_delay(t8);
5133 intel_dp->backlight_off_delay = get_delay(t9);
5134 intel_dp->panel_power_down_delay = get_delay(t10);
5135 intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
5138 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
5139 intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
5140 intel_dp->panel_power_cycle_delay);
5142 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
5143 intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
5146 * We override the HW backlight delays to 1 because we do manual waits
5147 * on them. For T8, even BSpec recommends doing it. For T9, if we
5148 * don't do this, we'll end up waiting for the backlight off delay
5149 * twice: once when we do the manual sleep, and once when we disable
5150 * the panel and wait for the PP_STATUS bit to become zero.
5157 intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
5158 struct intel_dp *intel_dp,
5159 bool force_disable_vdd)
5161 struct drm_i915_private *dev_priv = to_i915(dev);
5162 u32 pp_on, pp_off, pp_div, port_sel = 0;
5163 int div = dev_priv->rawclk_freq / 1000;
5164 struct pps_registers regs;
5165 enum port port = dp_to_dig_port(intel_dp)->port;
5166 const struct edp_power_seq *seq = &intel_dp->pps_delays;
5168 lockdep_assert_held(&dev_priv->pps_mutex);
5170 intel_pps_get_registers(dev_priv, intel_dp, ®s);
5173 * On some VLV machines the BIOS can leave the VDD
5174 * enabled even on power seqeuencers which aren't
5175 * hooked up to any port. This would mess up the
5176 * power domain tracking the first time we pick
5177 * one of these power sequencers for use since
5178 * edp_panel_vdd_on() would notice that the VDD was
5179 * already on and therefore wouldn't grab the power
5180 * domain reference. Disable VDD first to avoid this.
5181 * This also avoids spuriously turning the VDD on as
5182 * soon as the new power seqeuencer gets initialized.
5184 if (force_disable_vdd) {
5185 u32 pp = ironlake_get_pp_control(intel_dp);
5187 WARN(pp & PANEL_POWER_ON, "Panel power already on\n");
5189 if (pp & EDP_FORCE_VDD)
5190 DRM_DEBUG_KMS("VDD already on, disabling first\n");
5192 pp &= ~EDP_FORCE_VDD;
5194 I915_WRITE(regs.pp_ctrl, pp);
5197 pp_on = (seq->t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) |
5198 (seq->t8 << PANEL_LIGHT_ON_DELAY_SHIFT);
5199 pp_off = (seq->t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) |
5200 (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
5201 /* Compute the divisor for the pp clock, simply match the Bspec
5203 if (IS_GEN9_LP(dev_priv)) {
5204 pp_div = I915_READ(regs.pp_ctrl);
5205 pp_div &= ~BXT_POWER_CYCLE_DELAY_MASK;
5206 pp_div |= (DIV_ROUND_UP((seq->t11_t12 + 1), 1000)
5207 << BXT_POWER_CYCLE_DELAY_SHIFT);
5209 pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
5210 pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
5211 << PANEL_POWER_CYCLE_DELAY_SHIFT);
5214 /* Haswell doesn't have any port selection bits for the panel
5215 * power sequencer any more. */
5216 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
5217 port_sel = PANEL_PORT_SELECT_VLV(port);
5218 } else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
5220 port_sel = PANEL_PORT_SELECT_DPA;
5222 port_sel = PANEL_PORT_SELECT_DPD;
5227 I915_WRITE(regs.pp_on, pp_on);
5228 I915_WRITE(regs.pp_off, pp_off);
5229 if (IS_GEN9_LP(dev_priv))
5230 I915_WRITE(regs.pp_ctrl, pp_div);
5232 I915_WRITE(regs.pp_div, pp_div);
5234 DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
5235 I915_READ(regs.pp_on),
5236 I915_READ(regs.pp_off),
5237 IS_GEN9_LP(dev_priv) ?
5238 (I915_READ(regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK) :
5239 I915_READ(regs.pp_div));
5242 static void intel_dp_pps_init(struct drm_device *dev,
5243 struct intel_dp *intel_dp)
5245 struct drm_i915_private *dev_priv = to_i915(dev);
5247 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
5248 vlv_initial_power_sequencer_setup(intel_dp);
5250 intel_dp_init_panel_power_sequencer(dev, intel_dp);
5251 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, false);
5256 * intel_dp_set_drrs_state - program registers for RR switch to take effect
5257 * @dev_priv: i915 device
5258 * @crtc_state: a pointer to the active intel_crtc_state
5259 * @refresh_rate: RR to be programmed
5261 * This function gets called when refresh rate (RR) has to be changed from
5262 * one frequency to another. Switches can be between high and low RR
5263 * supported by the panel or to any other RR based on media playback (in
5264 * this case, RR value needs to be passed from user space).
5266 * The caller of this function needs to take a lock on dev_priv->drrs.
5268 static void intel_dp_set_drrs_state(struct drm_i915_private *dev_priv,
5269 struct intel_crtc_state *crtc_state,
5272 struct intel_encoder *encoder;
5273 struct intel_digital_port *dig_port = NULL;
5274 struct intel_dp *intel_dp = dev_priv->drrs.dp;
5275 struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
5276 enum drrs_refresh_rate_type index = DRRS_HIGH_RR;
5278 if (refresh_rate <= 0) {
5279 DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
5283 if (intel_dp == NULL) {
5284 DRM_DEBUG_KMS("DRRS not supported.\n");
5289 * FIXME: This needs proper synchronization with psr state for some
5290 * platforms that cannot have PSR and DRRS enabled at the same time.
5293 dig_port = dp_to_dig_port(intel_dp);
5294 encoder = &dig_port->base;
5295 intel_crtc = to_intel_crtc(encoder->base.crtc);
5298 DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
5302 if (dev_priv->drrs.type < SEAMLESS_DRRS_SUPPORT) {
5303 DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
5307 if (intel_dp->attached_connector->panel.downclock_mode->vrefresh ==
5309 index = DRRS_LOW_RR;
5311 if (index == dev_priv->drrs.refresh_rate_type) {
5313 "DRRS requested for previously set RR...ignoring\n");
5317 if (!crtc_state->base.active) {
5318 DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
5322 if (INTEL_GEN(dev_priv) >= 8 && !IS_CHERRYVIEW(dev_priv)) {
5325 intel_dp_set_m_n(intel_crtc, M1_N1);
5328 intel_dp_set_m_n(intel_crtc, M2_N2);
5332 DRM_ERROR("Unsupported refreshrate type\n");
5334 } else if (INTEL_GEN(dev_priv) > 6) {
5335 i915_reg_t reg = PIPECONF(crtc_state->cpu_transcoder);
5338 val = I915_READ(reg);
5339 if (index > DRRS_HIGH_RR) {
5340 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
5341 val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
5343 val |= PIPECONF_EDP_RR_MODE_SWITCH;
5345 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
5346 val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
5348 val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
5350 I915_WRITE(reg, val);
5353 dev_priv->drrs.refresh_rate_type = index;
5355 DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
5359 * intel_edp_drrs_enable - init drrs struct if supported
5360 * @intel_dp: DP struct
5361 * @crtc_state: A pointer to the active crtc state.
5363 * Initializes frontbuffer_bits and drrs.dp
5365 void intel_edp_drrs_enable(struct intel_dp *intel_dp,
5366 struct intel_crtc_state *crtc_state)
5368 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5369 struct drm_i915_private *dev_priv = to_i915(dev);
5371 if (!crtc_state->has_drrs) {
5372 DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
5376 mutex_lock(&dev_priv->drrs.mutex);
5377 if (WARN_ON(dev_priv->drrs.dp)) {
5378 DRM_ERROR("DRRS already enabled\n");
5382 dev_priv->drrs.busy_frontbuffer_bits = 0;
5384 dev_priv->drrs.dp = intel_dp;
5387 mutex_unlock(&dev_priv->drrs.mutex);
5391 * intel_edp_drrs_disable - Disable DRRS
5392 * @intel_dp: DP struct
5393 * @old_crtc_state: Pointer to old crtc_state.
5396 void intel_edp_drrs_disable(struct intel_dp *intel_dp,
5397 struct intel_crtc_state *old_crtc_state)
5399 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5400 struct drm_i915_private *dev_priv = to_i915(dev);
5402 if (!old_crtc_state->has_drrs)
5405 mutex_lock(&dev_priv->drrs.mutex);
5406 if (!dev_priv->drrs.dp) {
5407 mutex_unlock(&dev_priv->drrs.mutex);
5411 if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5412 intel_dp_set_drrs_state(dev_priv, old_crtc_state,
5413 intel_dp->attached_connector->panel.fixed_mode->vrefresh);
5415 dev_priv->drrs.dp = NULL;
5416 mutex_unlock(&dev_priv->drrs.mutex);
5418 cancel_delayed_work_sync(&dev_priv->drrs.work);
5421 static void intel_edp_drrs_downclock_work(struct work_struct *work)
5423 struct drm_i915_private *dev_priv =
5424 container_of(work, typeof(*dev_priv), drrs.work.work);
5425 struct intel_dp *intel_dp;
5427 mutex_lock(&dev_priv->drrs.mutex);
5429 intel_dp = dev_priv->drrs.dp;
5435 * The delayed work can race with an invalidate hence we need to
5439 if (dev_priv->drrs.busy_frontbuffer_bits)
5442 if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR) {
5443 struct drm_crtc *crtc = dp_to_dig_port(intel_dp)->base.base.crtc;
5445 intel_dp_set_drrs_state(dev_priv, to_intel_crtc(crtc)->config,
5446 intel_dp->attached_connector->panel.downclock_mode->vrefresh);
5450 mutex_unlock(&dev_priv->drrs.mutex);
5454 * intel_edp_drrs_invalidate - Disable Idleness DRRS
5455 * @dev_priv: i915 device
5456 * @frontbuffer_bits: frontbuffer plane tracking bits
5458 * This function gets called everytime rendering on the given planes start.
5459 * Hence DRRS needs to be Upclocked, i.e. (LOW_RR -> HIGH_RR).
5461 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5463 void intel_edp_drrs_invalidate(struct drm_i915_private *dev_priv,
5464 unsigned int frontbuffer_bits)
5466 struct drm_crtc *crtc;
5469 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
5472 cancel_delayed_work(&dev_priv->drrs.work);
5474 mutex_lock(&dev_priv->drrs.mutex);
5475 if (!dev_priv->drrs.dp) {
5476 mutex_unlock(&dev_priv->drrs.mutex);
5480 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
5481 pipe = to_intel_crtc(crtc)->pipe;
5483 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
5484 dev_priv->drrs.busy_frontbuffer_bits |= frontbuffer_bits;
5486 /* invalidate means busy screen hence upclock */
5487 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5488 intel_dp_set_drrs_state(dev_priv, to_intel_crtc(crtc)->config,
5489 dev_priv->drrs.dp->attached_connector->panel.fixed_mode->vrefresh);
5491 mutex_unlock(&dev_priv->drrs.mutex);
5495 * intel_edp_drrs_flush - Restart Idleness DRRS
5496 * @dev_priv: i915 device
5497 * @frontbuffer_bits: frontbuffer plane tracking bits
5499 * This function gets called every time rendering on the given planes has
5500 * completed or flip on a crtc is completed. So DRRS should be upclocked
5501 * (LOW_RR -> HIGH_RR). And also Idleness detection should be started again,
5502 * if no other planes are dirty.
5504 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5506 void intel_edp_drrs_flush(struct drm_i915_private *dev_priv,
5507 unsigned int frontbuffer_bits)
5509 struct drm_crtc *crtc;
5512 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
5515 cancel_delayed_work(&dev_priv->drrs.work);
5517 mutex_lock(&dev_priv->drrs.mutex);
5518 if (!dev_priv->drrs.dp) {
5519 mutex_unlock(&dev_priv->drrs.mutex);
5523 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
5524 pipe = to_intel_crtc(crtc)->pipe;
5526 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
5527 dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
5529 /* flush means busy screen hence upclock */
5530 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5531 intel_dp_set_drrs_state(dev_priv, to_intel_crtc(crtc)->config,
5532 dev_priv->drrs.dp->attached_connector->panel.fixed_mode->vrefresh);
5535 * flush also means no more activity hence schedule downclock, if all
5536 * other fbs are quiescent too
5538 if (!dev_priv->drrs.busy_frontbuffer_bits)
5539 schedule_delayed_work(&dev_priv->drrs.work,
5540 msecs_to_jiffies(1000));
5541 mutex_unlock(&dev_priv->drrs.mutex);
5545 * DOC: Display Refresh Rate Switching (DRRS)
5547 * Display Refresh Rate Switching (DRRS) is a power conservation feature
5548 * which enables swtching between low and high refresh rates,
5549 * dynamically, based on the usage scenario. This feature is applicable
5550 * for internal panels.
5552 * Indication that the panel supports DRRS is given by the panel EDID, which
5553 * would list multiple refresh rates for one resolution.
5555 * DRRS is of 2 types - static and seamless.
5556 * Static DRRS involves changing refresh rate (RR) by doing a full modeset
5557 * (may appear as a blink on screen) and is used in dock-undock scenario.
5558 * Seamless DRRS involves changing RR without any visual effect to the user
5559 * and can be used during normal system usage. This is done by programming
5560 * certain registers.
5562 * Support for static/seamless DRRS may be indicated in the VBT based on
5563 * inputs from the panel spec.
5565 * DRRS saves power by switching to low RR based on usage scenarios.
5567 * The implementation is based on frontbuffer tracking implementation. When
5568 * there is a disturbance on the screen triggered by user activity or a periodic
5569 * system activity, DRRS is disabled (RR is changed to high RR). When there is
5570 * no movement on screen, after a timeout of 1 second, a switch to low RR is
5573 * For integration with frontbuffer tracking code, intel_edp_drrs_invalidate()
5574 * and intel_edp_drrs_flush() are called.
5576 * DRRS can be further extended to support other internal panels and also
5577 * the scenario of video playback wherein RR is set based on the rate
5578 * requested by userspace.
5582 * intel_dp_drrs_init - Init basic DRRS work and mutex.
5583 * @intel_connector: eDP connector
5584 * @fixed_mode: preferred mode of panel
5586 * This function is called only once at driver load to initialize basic
5590 * Downclock mode if panel supports it, else return NULL.
5591 * DRRS support is determined by the presence of downclock mode (apart
5592 * from VBT setting).
5594 static struct drm_display_mode *
5595 intel_dp_drrs_init(struct intel_connector *intel_connector,
5596 struct drm_display_mode *fixed_mode)
5598 struct drm_connector *connector = &intel_connector->base;
5599 struct drm_device *dev = connector->dev;
5600 struct drm_i915_private *dev_priv = to_i915(dev);
5601 struct drm_display_mode *downclock_mode = NULL;
5603 INIT_DELAYED_WORK(&dev_priv->drrs.work, intel_edp_drrs_downclock_work);
5604 mutex_init(&dev_priv->drrs.mutex);
5606 if (INTEL_GEN(dev_priv) <= 6) {
5607 DRM_DEBUG_KMS("DRRS supported for Gen7 and above\n");
5611 if (dev_priv->vbt.drrs_type != SEAMLESS_DRRS_SUPPORT) {
5612 DRM_DEBUG_KMS("VBT doesn't support DRRS\n");
5616 downclock_mode = intel_find_panel_downclock
5617 (dev_priv, fixed_mode, connector);
5619 if (!downclock_mode) {
5620 DRM_DEBUG_KMS("Downclock mode is not found. DRRS not supported\n");
5624 dev_priv->drrs.type = dev_priv->vbt.drrs_type;
5626 dev_priv->drrs.refresh_rate_type = DRRS_HIGH_RR;
5627 DRM_DEBUG_KMS("seamless DRRS supported for eDP panel.\n");
5628 return downclock_mode;
5631 static bool intel_edp_init_connector(struct intel_dp *intel_dp,
5632 struct intel_connector *intel_connector)
5634 struct drm_connector *connector = &intel_connector->base;
5635 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
5636 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5637 struct drm_device *dev = intel_encoder->base.dev;
5638 struct drm_i915_private *dev_priv = to_i915(dev);
5639 struct drm_display_mode *fixed_mode = NULL;
5640 struct drm_display_mode *downclock_mode = NULL;
5642 struct drm_display_mode *scan;
5644 enum pipe pipe = INVALID_PIPE;
5646 if (!is_edp(intel_dp))
5650 * On IBX/CPT we may get here with LVDS already registered. Since the
5651 * driver uses the only internal power sequencer available for both
5652 * eDP and LVDS bail out early in this case to prevent interfering
5653 * with an already powered-on LVDS power sequencer.
5655 if (intel_get_lvds_encoder(dev)) {
5656 WARN_ON(!(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
5657 DRM_INFO("LVDS was detected, not registering eDP\n");
5664 intel_dp_init_panel_power_timestamps(intel_dp);
5665 intel_dp_pps_init(dev, intel_dp);
5666 intel_edp_panel_vdd_sanitize(intel_dp);
5668 pps_unlock(intel_dp);
5670 /* Cache DPCD and EDID for edp. */
5671 has_dpcd = intel_edp_init_dpcd(intel_dp);
5674 /* if this fails, presume the device is a ghost */
5675 DRM_INFO("failed to retrieve link info, disabling eDP\n");
5679 mutex_lock(&dev->mode_config.mutex);
5680 edid = drm_get_edid(connector, &intel_dp->aux.ddc);
5682 if (drm_add_edid_modes(connector, edid)) {
5683 drm_mode_connector_update_edid_property(connector,
5685 drm_edid_to_eld(connector, edid);
5688 edid = ERR_PTR(-EINVAL);
5691 edid = ERR_PTR(-ENOENT);
5693 intel_connector->edid = edid;
5695 /* prefer fixed mode from EDID if available */
5696 list_for_each_entry(scan, &connector->probed_modes, head) {
5697 if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
5698 fixed_mode = drm_mode_duplicate(dev, scan);
5699 downclock_mode = intel_dp_drrs_init(
5700 intel_connector, fixed_mode);
5705 /* fallback to VBT if available for eDP */
5706 if (!fixed_mode && dev_priv->vbt.lfp_lvds_vbt_mode) {
5707 fixed_mode = drm_mode_duplicate(dev,
5708 dev_priv->vbt.lfp_lvds_vbt_mode);
5710 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
5711 connector->display_info.width_mm = fixed_mode->width_mm;
5712 connector->display_info.height_mm = fixed_mode->height_mm;
5715 mutex_unlock(&dev->mode_config.mutex);
5717 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
5718 intel_dp->edp_notifier.notifier_call = edp_notify_handler;
5719 register_reboot_notifier(&intel_dp->edp_notifier);
5722 * Figure out the current pipe for the initial backlight setup.
5723 * If the current pipe isn't valid, try the PPS pipe, and if that
5724 * fails just assume pipe A.
5726 pipe = vlv_active_pipe(intel_dp);
5728 if (pipe != PIPE_A && pipe != PIPE_B)
5729 pipe = intel_dp->pps_pipe;
5731 if (pipe != PIPE_A && pipe != PIPE_B)
5734 DRM_DEBUG_KMS("using pipe %c for initial backlight setup\n",
5738 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
5739 intel_connector->panel.backlight.power = intel_edp_backlight_power;
5740 intel_panel_setup_backlight(connector, pipe);
5745 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
5747 * vdd might still be enabled do to the delayed vdd off.
5748 * Make sure vdd is actually turned off here.
5751 edp_panel_vdd_off_sync(intel_dp);
5752 pps_unlock(intel_dp);
5758 intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
5759 struct intel_connector *intel_connector)
5761 struct drm_connector *connector = &intel_connector->base;
5762 struct intel_dp *intel_dp = &intel_dig_port->dp;
5763 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5764 struct drm_device *dev = intel_encoder->base.dev;
5765 struct drm_i915_private *dev_priv = to_i915(dev);
5766 enum port port = intel_dig_port->port;
5769 if (WARN(intel_dig_port->max_lanes < 1,
5770 "Not enough lanes (%d) for DP on port %c\n",
5771 intel_dig_port->max_lanes, port_name(port)))
5774 intel_dp->pps_pipe = INVALID_PIPE;
5775 intel_dp->active_pipe = INVALID_PIPE;
5777 /* intel_dp vfuncs */
5778 if (INTEL_GEN(dev_priv) >= 9)
5779 intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
5780 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
5781 intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
5782 else if (HAS_PCH_SPLIT(dev_priv))
5783 intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
5785 intel_dp->get_aux_clock_divider = g4x_get_aux_clock_divider;
5787 if (INTEL_GEN(dev_priv) >= 9)
5788 intel_dp->get_aux_send_ctl = skl_get_aux_send_ctl;
5790 intel_dp->get_aux_send_ctl = g4x_get_aux_send_ctl;
5792 if (HAS_DDI(dev_priv))
5793 intel_dp->prepare_link_retrain = intel_ddi_prepare_link_retrain;
5795 /* Preserve the current hw state. */
5796 intel_dp->DP = I915_READ(intel_dp->output_reg);
5797 intel_dp->attached_connector = intel_connector;
5799 if (intel_dp_is_edp(dev_priv, port))
5800 type = DRM_MODE_CONNECTOR_eDP;
5802 type = DRM_MODE_CONNECTOR_DisplayPort;
5804 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
5805 intel_dp->active_pipe = vlv_active_pipe(intel_dp);
5808 * For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but
5809 * for DP the encoder type can be set by the caller to
5810 * INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it.
5812 if (type == DRM_MODE_CONNECTOR_eDP)
5813 intel_encoder->type = INTEL_OUTPUT_EDP;
5815 /* eDP only on port B and/or C on vlv/chv */
5816 if (WARN_ON((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
5817 is_edp(intel_dp) && port != PORT_B && port != PORT_C))
5820 DRM_DEBUG_KMS("Adding %s connector on port %c\n",
5821 type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
5824 drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
5825 drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
5827 connector->interlace_allowed = true;
5828 connector->doublescan_allowed = 0;
5830 intel_dp_aux_init(intel_dp);
5832 INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
5833 edp_panel_vdd_work);
5835 intel_connector_attach_encoder(intel_connector, intel_encoder);
5837 if (HAS_DDI(dev_priv))
5838 intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
5840 intel_connector->get_hw_state = intel_connector_get_hw_state;
5842 /* Set up the hotplug pin. */
5845 intel_encoder->hpd_pin = HPD_PORT_A;
5848 intel_encoder->hpd_pin = HPD_PORT_B;
5849 if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1))
5850 intel_encoder->hpd_pin = HPD_PORT_A;
5853 intel_encoder->hpd_pin = HPD_PORT_C;
5856 intel_encoder->hpd_pin = HPD_PORT_D;
5859 intel_encoder->hpd_pin = HPD_PORT_E;
5865 /* init MST on ports that can support it */
5866 if (HAS_DP_MST(dev_priv) && !is_edp(intel_dp) &&
5867 (port == PORT_B || port == PORT_C || port == PORT_D))
5868 intel_dp_mst_encoder_init(intel_dig_port,
5869 intel_connector->base.base.id);
5871 if (!intel_edp_init_connector(intel_dp, intel_connector)) {
5872 intel_dp_aux_fini(intel_dp);
5873 intel_dp_mst_encoder_cleanup(intel_dig_port);
5877 intel_dp_add_properties(intel_dp, connector);
5879 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
5880 * 0xd. Failure to do so will result in spurious interrupts being
5881 * generated on the port when a cable is not attached.
5883 if (IS_G4X(dev_priv) && !IS_GM45(dev_priv)) {
5884 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
5885 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
5891 drm_connector_cleanup(connector);
5896 bool intel_dp_init(struct drm_i915_private *dev_priv,
5897 i915_reg_t output_reg,
5900 struct intel_digital_port *intel_dig_port;
5901 struct intel_encoder *intel_encoder;
5902 struct drm_encoder *encoder;
5903 struct intel_connector *intel_connector;
5905 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
5906 if (!intel_dig_port)
5909 intel_connector = intel_connector_alloc();
5910 if (!intel_connector)
5911 goto err_connector_alloc;
5913 intel_encoder = &intel_dig_port->base;
5914 encoder = &intel_encoder->base;
5916 if (drm_encoder_init(&dev_priv->drm, &intel_encoder->base,
5917 &intel_dp_enc_funcs, DRM_MODE_ENCODER_TMDS,
5918 "DP %c", port_name(port)))
5919 goto err_encoder_init;
5921 intel_encoder->compute_config = intel_dp_compute_config;
5922 intel_encoder->disable = intel_disable_dp;
5923 intel_encoder->get_hw_state = intel_dp_get_hw_state;
5924 intel_encoder->get_config = intel_dp_get_config;
5925 intel_encoder->suspend = intel_dp_encoder_suspend;
5926 if (IS_CHERRYVIEW(dev_priv)) {
5927 intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
5928 intel_encoder->pre_enable = chv_pre_enable_dp;
5929 intel_encoder->enable = vlv_enable_dp;
5930 intel_encoder->post_disable = chv_post_disable_dp;
5931 intel_encoder->post_pll_disable = chv_dp_post_pll_disable;
5932 } else if (IS_VALLEYVIEW(dev_priv)) {
5933 intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
5934 intel_encoder->pre_enable = vlv_pre_enable_dp;
5935 intel_encoder->enable = vlv_enable_dp;
5936 intel_encoder->post_disable = vlv_post_disable_dp;
5938 intel_encoder->pre_enable = g4x_pre_enable_dp;
5939 intel_encoder->enable = g4x_enable_dp;
5940 if (INTEL_GEN(dev_priv) >= 5)
5941 intel_encoder->post_disable = ilk_post_disable_dp;
5944 intel_dig_port->port = port;
5945 intel_dig_port->dp.output_reg = output_reg;
5946 intel_dig_port->max_lanes = 4;
5948 intel_encoder->type = INTEL_OUTPUT_DP;
5949 if (IS_CHERRYVIEW(dev_priv)) {
5951 intel_encoder->crtc_mask = 1 << 2;
5953 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
5955 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
5957 intel_encoder->cloneable = 0;
5958 intel_encoder->port = port;
5960 intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
5961 dev_priv->hotplug.irq_port[port] = intel_dig_port;
5963 if (!intel_dp_init_connector(intel_dig_port, intel_connector))
5964 goto err_init_connector;
5969 drm_encoder_cleanup(encoder);
5971 kfree(intel_connector);
5972 err_connector_alloc:
5973 kfree(intel_dig_port);
5977 void intel_dp_mst_suspend(struct drm_device *dev)
5979 struct drm_i915_private *dev_priv = to_i915(dev);
5983 for (i = 0; i < I915_MAX_PORTS; i++) {
5984 struct intel_digital_port *intel_dig_port = dev_priv->hotplug.irq_port[i];
5986 if (!intel_dig_port || !intel_dig_port->dp.can_mst)
5989 if (intel_dig_port->dp.is_mst)
5990 drm_dp_mst_topology_mgr_suspend(&intel_dig_port->dp.mst_mgr);
5994 void intel_dp_mst_resume(struct drm_device *dev)
5996 struct drm_i915_private *dev_priv = to_i915(dev);
5999 for (i = 0; i < I915_MAX_PORTS; i++) {
6000 struct intel_digital_port *intel_dig_port = dev_priv->hotplug.irq_port[i];
6003 if (!intel_dig_port || !intel_dig_port->dp.can_mst)
6006 ret = drm_dp_mst_topology_mgr_resume(&intel_dig_port->dp.mst_mgr);
6008 intel_dp_check_mst_status(&intel_dig_port->dp);