2 * Copyright © 2006 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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Eric Anholt <eric@anholt.net>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
32 #include "intel_bios.h"
34 #define SLAVE_ADDR1 0x70
35 #define SLAVE_ADDR2 0x72
37 static int panel_type;
40 find_section(const void *_bdb, int section_id)
42 const struct bdb_header *bdb = _bdb;
43 const u8 *base = _bdb;
45 u32 total, current_size;
48 /* skip to first section */
49 index += bdb->header_size;
50 total = bdb->bdb_size;
52 /* walk the sections looking for section_id */
53 while (index + 3 < total) {
54 current_id = *(base + index);
57 current_size = *((const u16 *)(base + index));
60 /* The MIPI Sequence Block v3+ has a separate size field. */
61 if (current_id == BDB_MIPI_SEQUENCE && *(base + index) >= 3)
62 current_size = *((const u32 *)(base + index + 1));
64 if (index + current_size > total)
67 if (current_id == section_id)
70 index += current_size;
77 get_blocksize(const void *p)
79 u16 *block_ptr, block_size;
81 block_ptr = (u16 *)((char *)p - 2);
82 block_size = *block_ptr;
87 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
88 const struct lvds_dvo_timing *dvo_timing)
90 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
91 dvo_timing->hactive_lo;
92 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
93 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
94 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
95 dvo_timing->hsync_pulse_width;
96 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
97 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
99 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
100 dvo_timing->vactive_lo;
101 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
102 dvo_timing->vsync_off;
103 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
104 dvo_timing->vsync_pulse_width;
105 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
106 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
107 panel_fixed_mode->clock = dvo_timing->clock * 10;
108 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
110 if (dvo_timing->hsync_positive)
111 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
113 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
115 if (dvo_timing->vsync_positive)
116 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
118 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
120 /* Some VBTs have bogus h/vtotal values */
121 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
122 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
123 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
124 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
126 drm_mode_set_name(panel_fixed_mode);
129 static const struct lvds_dvo_timing *
130 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
131 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
135 * the size of fp_timing varies on the different platform.
136 * So calculate the DVO timing relative offset in LVDS data
137 * entry to get the DVO timing entry
141 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
142 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
143 int dvo_timing_offset =
144 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
145 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
146 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
148 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
151 /* get lvds_fp_timing entry
152 * this function may return NULL if the corresponding entry is invalid
154 static const struct lvds_fp_timing *
155 get_lvds_fp_timing(const struct bdb_header *bdb,
156 const struct bdb_lvds_lfp_data *data,
157 const struct bdb_lvds_lfp_data_ptrs *ptrs,
160 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
161 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
164 if (index >= ARRAY_SIZE(ptrs->ptr))
166 ofs = ptrs->ptr[index].fp_timing_offset;
167 if (ofs < data_ofs ||
168 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
170 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
173 /* Try to find integrated panel data */
175 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
176 const struct bdb_header *bdb)
178 const struct bdb_lvds_options *lvds_options;
179 const struct bdb_lvds_lfp_data *lvds_lfp_data;
180 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
181 const struct lvds_dvo_timing *panel_dvo_timing;
182 const struct lvds_fp_timing *fp_timing;
183 struct drm_display_mode *panel_fixed_mode;
186 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
190 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
191 if (lvds_options->panel_type == 0xff)
194 panel_type = lvds_options->panel_type;
196 drrs_mode = (lvds_options->dps_panel_type_bits
197 >> (panel_type * 2)) & MODE_MASK;
199 * VBT has static DRRS = 0 and seamless DRRS = 2.
200 * The below piece of code is required to adjust vbt.drrs_type
201 * to match the enum drrs_support_type.
205 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
206 DRM_DEBUG_KMS("DRRS supported mode is static\n");
209 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
210 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
213 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
214 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
218 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
222 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
223 if (!lvds_lfp_data_ptrs)
226 dev_priv->vbt.lvds_vbt = 1;
228 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
230 lvds_options->panel_type);
232 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
233 if (!panel_fixed_mode)
236 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
238 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
240 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
241 drm_mode_debug_printmodeline(panel_fixed_mode);
243 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
245 lvds_options->panel_type);
247 /* check the resolution, just to be sure */
248 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
249 fp_timing->y_res == panel_fixed_mode->vdisplay) {
250 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
251 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
252 dev_priv->vbt.bios_lvds_val);
258 parse_lfp_backlight(struct drm_i915_private *dev_priv,
259 const struct bdb_header *bdb)
261 const struct bdb_lfp_backlight_data *backlight_data;
262 const struct bdb_lfp_backlight_data_entry *entry;
264 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
268 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
269 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
270 backlight_data->entry_size);
274 entry = &backlight_data->data[panel_type];
276 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
277 if (!dev_priv->vbt.backlight.present) {
278 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
283 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
284 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
285 dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
286 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
287 "active %s, min brightness %u, level %u\n",
288 dev_priv->vbt.backlight.pwm_freq_hz,
289 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
290 dev_priv->vbt.backlight.min_brightness,
291 backlight_data->level[panel_type]);
294 /* Try to find sdvo panel data */
296 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
297 const struct bdb_header *bdb)
299 const struct lvds_dvo_timing *dvo_timing;
300 struct drm_display_mode *panel_fixed_mode;
303 index = i915.vbt_sdvo_panel_type;
305 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
310 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
312 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
313 if (!sdvo_lvds_options)
316 index = sdvo_lvds_options->panel_type;
319 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
323 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
324 if (!panel_fixed_mode)
327 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
329 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
331 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
332 drm_mode_debug_printmodeline(panel_fixed_mode);
335 static int intel_bios_ssc_frequency(struct drm_device *dev,
338 switch (INTEL_INFO(dev)->gen) {
340 return alternate ? 66667 : 48000;
343 return alternate ? 100000 : 96000;
345 return alternate ? 100000 : 120000;
350 parse_general_features(struct drm_i915_private *dev_priv,
351 const struct bdb_header *bdb)
353 struct drm_device *dev = dev_priv->dev;
354 const struct bdb_general_features *general;
356 general = find_section(bdb, BDB_GENERAL_FEATURES);
358 dev_priv->vbt.int_tv_support = general->int_tv_support;
359 /* int_crt_support can't be trusted on earlier platforms */
360 if (bdb->version >= 155 &&
361 (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
362 dev_priv->vbt.int_crt_support = general->int_crt_support;
363 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
364 dev_priv->vbt.lvds_ssc_freq =
365 intel_bios_ssc_frequency(dev, general->ssc_freq);
366 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
367 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
368 DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
369 dev_priv->vbt.int_tv_support,
370 dev_priv->vbt.int_crt_support,
371 dev_priv->vbt.lvds_use_ssc,
372 dev_priv->vbt.lvds_ssc_freq,
373 dev_priv->vbt.display_clock_mode,
374 dev_priv->vbt.fdi_rx_polarity_inverted);
379 parse_general_definitions(struct drm_i915_private *dev_priv,
380 const struct bdb_header *bdb)
382 const struct bdb_general_definitions *general;
384 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
386 u16 block_size = get_blocksize(general);
387 if (block_size >= sizeof(*general)) {
388 int bus_pin = general->crt_ddc_gmbus_pin;
389 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
390 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
391 dev_priv->vbt.crt_ddc_pin = bus_pin;
393 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
399 static const union child_device_config *
400 child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
402 return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
406 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
407 const struct bdb_header *bdb)
409 struct sdvo_device_mapping *p_mapping;
410 const struct bdb_general_definitions *p_defs;
411 const struct old_child_dev_config *child; /* legacy */
412 int i, child_device_num, count;
415 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
417 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
422 * Only parse SDVO mappings when the general definitions block child
423 * device size matches that of the *legacy* child device config
424 * struct. Thus, SDVO mapping will be skipped for newer VBT.
426 if (p_defs->child_dev_size != sizeof(*child)) {
427 DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
430 /* get the block size of general definitions */
431 block_size = get_blocksize(p_defs);
432 /* get the number of child device */
433 child_device_num = (block_size - sizeof(*p_defs)) /
434 p_defs->child_dev_size;
436 for (i = 0; i < child_device_num; i++) {
437 child = &child_device_ptr(p_defs, i)->old;
438 if (!child->device_type) {
439 /* skip the device block if device type is invalid */
442 if (child->slave_addr != SLAVE_ADDR1 &&
443 child->slave_addr != SLAVE_ADDR2) {
445 * If the slave address is neither 0x70 nor 0x72,
446 * it is not a SDVO device. Skip it.
450 if (child->dvo_port != DEVICE_PORT_DVOB &&
451 child->dvo_port != DEVICE_PORT_DVOC) {
452 /* skip the incorrect SDVO port */
453 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
456 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
459 (child->dvo_port == DEVICE_PORT_DVOB) ?
461 p_mapping = &(dev_priv->sdvo_mappings[child->dvo_port - 1]);
462 if (!p_mapping->initialized) {
463 p_mapping->dvo_port = child->dvo_port;
464 p_mapping->slave_addr = child->slave_addr;
465 p_mapping->dvo_wiring = child->dvo_wiring;
466 p_mapping->ddc_pin = child->ddc_pin;
467 p_mapping->i2c_pin = child->i2c_pin;
468 p_mapping->initialized = 1;
469 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
471 p_mapping->slave_addr,
472 p_mapping->dvo_wiring,
476 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
477 "two SDVO device.\n");
479 if (child->slave2_addr) {
480 /* Maybe this is a SDVO device with multiple inputs */
481 /* And the mapping info is not added */
482 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
483 " is a SDVO device with multiple inputs.\n");
489 /* No SDVO device info is found */
490 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
496 parse_driver_features(struct drm_i915_private *dev_priv,
497 const struct bdb_header *bdb)
499 const struct bdb_driver_features *driver;
501 driver = find_section(bdb, BDB_DRIVER_FEATURES);
505 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
506 dev_priv->vbt.edp_support = 1;
508 if (driver->dual_frequency)
509 dev_priv->render_reclock_avail = true;
511 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
513 * If DRRS is not supported, drrs_type has to be set to 0.
514 * This is because, VBT is configured in such a way that
515 * static DRRS is 0 and DRRS not supported is represented by
516 * driver->drrs_enabled=false
518 if (!driver->drrs_enabled)
519 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
523 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
525 const struct bdb_edp *edp;
526 const struct edp_power_seq *edp_pps;
527 const struct edp_link_params *edp_link_params;
529 edp = find_section(bdb, BDB_EDP);
531 if (dev_priv->vbt.edp_support)
532 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
536 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
538 dev_priv->vbt.edp_bpp = 18;
541 dev_priv->vbt.edp_bpp = 24;
544 dev_priv->vbt.edp_bpp = 30;
548 /* Get the eDP sequencing and link info */
549 edp_pps = &edp->power_seqs[panel_type];
550 edp_link_params = &edp->link_params[panel_type];
552 dev_priv->vbt.edp_pps = *edp_pps;
554 switch (edp_link_params->rate) {
556 dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
559 dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
562 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
563 edp_link_params->rate);
567 switch (edp_link_params->lanes) {
569 dev_priv->vbt.edp_lanes = 1;
572 dev_priv->vbt.edp_lanes = 2;
575 dev_priv->vbt.edp_lanes = 4;
578 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
579 edp_link_params->lanes);
583 switch (edp_link_params->preemphasis) {
584 case EDP_PREEMPHASIS_NONE:
585 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
587 case EDP_PREEMPHASIS_3_5dB:
588 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
590 case EDP_PREEMPHASIS_6dB:
591 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
593 case EDP_PREEMPHASIS_9_5dB:
594 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
597 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
598 edp_link_params->preemphasis);
602 switch (edp_link_params->vswing) {
603 case EDP_VSWING_0_4V:
604 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
606 case EDP_VSWING_0_6V:
607 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
609 case EDP_VSWING_0_8V:
610 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
612 case EDP_VSWING_1_2V:
613 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
616 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
617 edp_link_params->vswing);
621 if (bdb->version >= 173) {
624 /* Don't read from VBT if module parameter has valid value*/
625 if (i915.edp_vswing) {
626 dev_priv->edp_low_vswing = i915.edp_vswing == 1;
628 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
629 dev_priv->edp_low_vswing = vswing == 0;
635 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
637 const struct bdb_psr *psr;
638 const struct psr_table *psr_table;
640 psr = find_section(bdb, BDB_PSR);
642 DRM_DEBUG_KMS("No PSR BDB found.\n");
646 psr_table = &psr->psr_table[panel_type];
648 dev_priv->vbt.psr.full_link = psr_table->full_link;
649 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
651 /* Allowed VBT values goes from 0 to 15 */
652 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
653 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
655 switch (psr_table->lines_to_wait) {
657 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
660 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
663 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
666 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
669 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
670 psr_table->lines_to_wait);
674 dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
675 dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
678 static u8 *goto_next_sequence(u8 *data, int *size)
686 /* goto first element */
690 case MIPI_SEQ_ELEM_SEND_PKT:
692 * skip by this element payload size
693 * skip elem id, command flag and data type
700 len = *((u16 *)data);
707 data = data + 2 + len;
709 case MIPI_SEQ_ELEM_DELAY:
710 /* skip by elem id, and delay is 4 bytes */
717 case MIPI_SEQ_ELEM_GPIO:
725 DRM_ERROR("Unknown element\n");
729 /* end of sequence ? */
734 /* goto next sequence or end of block byte */
740 /* update amount of data left for the sequence block to be parsed */
746 parse_mipi(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
748 const struct bdb_mipi_config *start;
749 const struct bdb_mipi_sequence *sequence;
750 const struct mipi_config *config;
751 const struct mipi_pps_data *pps;
754 int i, panel_id, seq_size;
757 /* parse MIPI blocks only if LFP type is MIPI */
758 if (!dev_priv->vbt.has_mipi)
761 /* Initialize this to undefined indicating no generic MIPI support */
762 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
764 /* Block #40 is already parsed and panel_fixed_mode is
765 * stored in dev_priv->lfp_lvds_vbt_mode
766 * resuse this when needed
769 /* Parse #52 for panel index used from panel_type already
772 start = find_section(bdb, BDB_MIPI_CONFIG);
774 DRM_DEBUG_KMS("No MIPI config BDB found");
778 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
782 * get hold of the correct configuration block and pps data as per
783 * the panel_type as index
785 config = &start->config[panel_type];
786 pps = &start->pps[panel_type];
788 /* store as of now full data. Trim when we realise all is not needed */
789 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
790 if (!dev_priv->vbt.dsi.config)
793 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
794 if (!dev_priv->vbt.dsi.pps) {
795 kfree(dev_priv->vbt.dsi.config);
799 /* We have mandatory mipi config blocks. Initialize as generic panel */
800 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
802 /* Check if we have sequence block as well */
803 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
805 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
809 /* Fail gracefully for forward incompatible sequence block. */
810 if (sequence->version >= 3) {
811 DRM_ERROR("Unable to parse MIPI Sequence Block v3+\n");
815 DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
817 block_size = get_blocksize(sequence);
820 * parse the sequence block for individual sequences
822 dev_priv->vbt.dsi.seq_version = sequence->version;
824 seq_data = &sequence->data[0];
827 * sequence block is variable length and hence we need to parse and
828 * get the sequence data for specific panel id
830 for (i = 0; i < MAX_MIPI_CONFIGURATIONS; i++) {
831 panel_id = *seq_data;
832 seq_size = *((u16 *) (seq_data + 1));
833 if (panel_id == panel_type)
836 /* skip the sequence including seq header of 3 bytes */
837 seq_data = seq_data + 3 + seq_size;
838 if ((seq_data - &sequence->data[0]) > block_size) {
839 DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
844 if (i == MAX_MIPI_CONFIGURATIONS) {
845 DRM_ERROR("Sequence block detected but no valid configuration\n");
849 /* check if found sequence is completely within the sequence block
850 * just being paranoid */
851 if (seq_size > block_size) {
852 DRM_ERROR("Corrupted sequence/size, bailing out\n");
856 /* skip the panel id(1 byte) and seq size(2 bytes) */
857 dev_priv->vbt.dsi.data = kmemdup(seq_data + 3, seq_size, GFP_KERNEL);
858 if (!dev_priv->vbt.dsi.data)
862 * loop into the sequence data and split into multiple sequneces
863 * There are only 5 types of sequences as of now
865 data = dev_priv->vbt.dsi.data;
866 dev_priv->vbt.dsi.size = seq_size;
868 /* two consecutive 0x00 indicate end of all sequences */
871 if (MIPI_SEQ_MAX > seq_id && seq_id > MIPI_SEQ_UNDEFINED) {
872 dev_priv->vbt.dsi.sequence[seq_id] = data;
873 DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id);
875 DRM_ERROR("undefined sequence\n");
879 /* partial parsing to skip elements */
880 data = goto_next_sequence(data, &seq_size);
883 DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
888 break; /* end of sequence reached */
891 DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
894 kfree(dev_priv->vbt.dsi.data);
895 dev_priv->vbt.dsi.data = NULL;
897 /* error during parsing so set all pointers to null
898 * because of partial parsing */
899 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
902 static u8 translate_iboost(u8 val)
904 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
906 if (val >= ARRAY_SIZE(mapping)) {
907 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
913 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
914 const struct bdb_header *bdb)
916 union child_device_config *it, *child = NULL;
917 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
918 uint8_t hdmi_level_shift;
920 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
921 uint8_t aux_channel, ddc_pin;
922 /* Each DDI port can have more than one value on the "DVO Port" field,
923 * so look for all the possible values for each port and abort if more
924 * than one is found. */
925 int dvo_ports[][3] = {
926 {DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
927 {DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
928 {DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
929 {DVO_PORT_HDMID, DVO_PORT_DPD, -1},
930 {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
933 /* Find the child device to use, abort if more than one found. */
934 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
935 it = dev_priv->vbt.child_dev + i;
937 for (j = 0; j < 3; j++) {
938 if (dvo_ports[port][j] == -1)
941 if (it->common.dvo_port == dvo_ports[port][j]) {
943 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
954 aux_channel = child->raw[25];
955 ddc_pin = child->common.ddc_pin;
957 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
958 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
959 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
960 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
961 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
963 info->supports_dvi = is_dvi;
964 info->supports_hdmi = is_hdmi;
965 info->supports_dp = is_dp;
967 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
968 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
970 if (is_edp && is_dvi)
971 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
973 if (is_crt && port != PORT_E)
974 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
975 if (is_crt && (is_dvi || is_dp))
976 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
978 if (is_dvi && (port == PORT_A || port == PORT_E))
979 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
980 if (!is_dvi && !is_dp && !is_crt)
981 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
983 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
984 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
987 if (port == PORT_E) {
988 info->alternate_ddc_pin = ddc_pin;
989 /* if DDIE share ddc pin with other port, then
990 * dvi/hdmi couldn't exist on the shared port.
991 * Otherwise they share the same ddc bin and system
992 * couldn't communicate with them seperately. */
993 if (ddc_pin == DDC_PIN_B) {
994 dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
995 dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
996 } else if (ddc_pin == DDC_PIN_C) {
997 dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
998 dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
999 } else if (ddc_pin == DDC_PIN_D) {
1000 dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
1001 dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
1003 } else if (ddc_pin == DDC_PIN_B && port != PORT_B)
1004 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
1005 else if (ddc_pin == DDC_PIN_C && port != PORT_C)
1006 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
1007 else if (ddc_pin == DDC_PIN_D && port != PORT_D)
1008 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
1012 if (port == PORT_E) {
1013 info->alternate_aux_channel = aux_channel;
1014 /* if DDIE share aux channel with other port, then
1015 * DP couldn't exist on the shared port. Otherwise
1016 * they share the same aux channel and system
1017 * couldn't communicate with them seperately. */
1018 if (aux_channel == DP_AUX_A)
1019 dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0;
1020 else if (aux_channel == DP_AUX_B)
1021 dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0;
1022 else if (aux_channel == DP_AUX_C)
1023 dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0;
1024 else if (aux_channel == DP_AUX_D)
1025 dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0;
1027 else if (aux_channel == DP_AUX_A && port != PORT_A)
1028 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
1029 else if (aux_channel == DP_AUX_B && port != PORT_B)
1030 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
1031 else if (aux_channel == DP_AUX_C && port != PORT_C)
1032 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
1033 else if (aux_channel == DP_AUX_D && port != PORT_D)
1034 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
1037 if (bdb->version >= 158) {
1038 /* The VBT HDMI level shift values match the table we have. */
1039 hdmi_level_shift = child->raw[7] & 0xF;
1040 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1043 info->hdmi_level_shift = hdmi_level_shift;
1046 /* Parse the I_boost config for SKL and above */
1047 if (bdb->version >= 196 && (child->common.flags_1 & IBOOST_ENABLE)) {
1048 info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
1049 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1050 port_name(port), info->dp_boost_level);
1051 info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
1052 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1053 port_name(port), info->hdmi_boost_level);
1057 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
1058 const struct bdb_header *bdb)
1060 struct drm_device *dev = dev_priv->dev;
1066 if (!dev_priv->vbt.child_dev_num)
1069 if (bdb->version < 155)
1072 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1073 parse_ddi_port(dev_priv, port, bdb);
1077 parse_device_mapping(struct drm_i915_private *dev_priv,
1078 const struct bdb_header *bdb)
1080 const struct bdb_general_definitions *p_defs;
1081 const union child_device_config *p_child;
1082 union child_device_config *child_dev_ptr;
1083 int i, child_device_num, count;
1087 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1089 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1092 if (bdb->version < 195) {
1093 expected_size = sizeof(struct old_child_dev_config);
1094 } else if (bdb->version == 195) {
1096 } else if (bdb->version <= 197) {
1100 BUILD_BUG_ON(sizeof(*p_child) < 38);
1101 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1102 bdb->version, expected_size);
1105 /* The legacy sized child device config is the minimum we need. */
1106 if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
1107 DRM_ERROR("Child device config size %u is too small.\n",
1108 p_defs->child_dev_size);
1112 /* Flag an error for unexpected size, but continue anyway. */
1113 if (p_defs->child_dev_size != expected_size)
1114 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1115 p_defs->child_dev_size, expected_size, bdb->version);
1117 /* get the block size of general definitions */
1118 block_size = get_blocksize(p_defs);
1119 /* get the number of child device */
1120 child_device_num = (block_size - sizeof(*p_defs)) /
1121 p_defs->child_dev_size;
1123 /* get the number of child device that is present */
1124 for (i = 0; i < child_device_num; i++) {
1125 p_child = child_device_ptr(p_defs, i);
1126 if (!p_child->common.device_type) {
1127 /* skip the device block if device type is invalid */
1133 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1136 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
1137 if (!dev_priv->vbt.child_dev) {
1138 DRM_DEBUG_KMS("No memory space for child device\n");
1142 dev_priv->vbt.child_dev_num = count;
1144 for (i = 0; i < child_device_num; i++) {
1145 p_child = child_device_ptr(p_defs, i);
1146 if (!p_child->common.device_type) {
1147 /* skip the device block if device type is invalid */
1151 if (p_child->common.dvo_port >= DVO_PORT_MIPIA
1152 && p_child->common.dvo_port <= DVO_PORT_MIPID
1153 &&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
1154 DRM_DEBUG_KMS("Found MIPI as LFP\n");
1155 dev_priv->vbt.has_mipi = 1;
1156 dev_priv->vbt.dsi.port = p_child->common.dvo_port;
1159 child_dev_ptr = dev_priv->vbt.child_dev + count;
1163 * Copy as much as we know (sizeof) and is available
1164 * (child_dev_size) of the child device. Accessing the data must
1165 * depend on VBT version.
1167 memcpy(child_dev_ptr, p_child,
1168 min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
1174 init_vbt_defaults(struct drm_i915_private *dev_priv)
1176 struct drm_device *dev = dev_priv->dev;
1179 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1181 /* Default to having backlight */
1182 dev_priv->vbt.backlight.present = true;
1184 /* LFP panel data */
1185 dev_priv->vbt.lvds_dither = 1;
1186 dev_priv->vbt.lvds_vbt = 0;
1188 /* SDVO panel data */
1189 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1191 /* general features */
1192 dev_priv->vbt.int_tv_support = 1;
1193 dev_priv->vbt.int_crt_support = 1;
1195 /* Default to using SSC */
1196 dev_priv->vbt.lvds_use_ssc = 1;
1198 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1201 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
1202 !HAS_PCH_SPLIT(dev));
1203 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1205 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1206 struct ddi_vbt_port_info *info =
1207 &dev_priv->vbt.ddi_port_info[port];
1209 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1211 info->supports_dvi = (port != PORT_A && port != PORT_E);
1212 info->supports_hdmi = info->supports_dvi;
1213 info->supports_dp = (port != PORT_E);
1217 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1219 const void *_vbt = vbt;
1221 return _vbt + vbt->bdb_offset;
1225 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1226 * @buf: pointer to a buffer to validate
1227 * @size: size of the buffer
1229 * Returns true on valid VBT.
1231 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1233 const struct vbt_header *vbt = buf;
1234 const struct bdb_header *bdb;
1239 if (sizeof(struct vbt_header) > size) {
1240 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1244 if (memcmp(vbt->signature, "$VBT", 4)) {
1245 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1249 if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
1250 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1254 bdb = get_bdb_header(vbt);
1255 if (vbt->bdb_offset + bdb->bdb_size > size) {
1256 DRM_DEBUG_DRIVER("BDB incomplete\n");
1263 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1267 /* Scour memory looking for the VBT signature. */
1268 for (i = 0; i + 4 < size; i++) {
1271 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1275 * This is the one place where we explicitly discard the address
1276 * space (__iomem) of the BIOS/VBT.
1278 vbt = (void __force *) bios + i;
1279 if (intel_bios_is_valid_vbt(vbt, size - i))
1289 * intel_bios_init - find VBT and initialize settings from the BIOS
1292 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1293 * to appropriate values.
1295 * Returns 0 on success, nonzero on failure.
1298 intel_bios_init(struct drm_device *dev)
1300 struct drm_i915_private *dev_priv = dev->dev_private;
1301 struct pci_dev *pdev = dev->pdev;
1302 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1303 const struct bdb_header *bdb;
1304 u8 __iomem *bios = NULL;
1306 if (HAS_PCH_NOP(dev))
1309 init_vbt_defaults(dev_priv);
1314 bios = pci_map_rom(pdev, &size);
1318 vbt = find_vbt(bios, size);
1320 pci_unmap_rom(pdev, bios);
1324 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1327 bdb = get_bdb_header(vbt);
1329 DRM_DEBUG_KMS("VBT signature \"%20s\", BDB version %d\n",
1330 vbt->signature, bdb->version);
1332 /* Grab useful general definitions */
1333 parse_general_features(dev_priv, bdb);
1334 parse_general_definitions(dev_priv, bdb);
1335 parse_lfp_panel_data(dev_priv, bdb);
1336 parse_lfp_backlight(dev_priv, bdb);
1337 parse_sdvo_panel_data(dev_priv, bdb);
1338 parse_sdvo_device_mapping(dev_priv, bdb);
1339 parse_device_mapping(dev_priv, bdb);
1340 parse_driver_features(dev_priv, bdb);
1341 parse_edp(dev_priv, bdb);
1342 parse_psr(dev_priv, bdb);
1343 parse_mipi(dev_priv, bdb);
1344 parse_ddi_ports(dev_priv, bdb);
1347 pci_unmap_rom(pdev, bios);