2 * Copyright © 2008 Intel Corporation
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28 #include "intel_drv.h"
29 #include <drm/drm_atomic_helper.h>
30 #include <drm/drm_crtc_helper.h>
31 #include <drm/drm_edid.h>
33 static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
34 struct intel_crtc_state *pipe_config,
35 struct drm_connector_state *conn_state)
37 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
38 struct intel_digital_port *intel_dig_port = intel_mst->primary;
39 struct intel_dp *intel_dp = &intel_dig_port->dp;
40 struct drm_atomic_state *state;
42 int lane_count, slots;
43 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
46 pipe_config->dp_encoder_is_mst = true;
47 pipe_config->has_pch_encoder = false;
50 * for MST we always configure max link bw - the spec doesn't
51 * seem to suggest we should do otherwise.
53 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
55 pipe_config->lane_count = lane_count;
57 pipe_config->pipe_bpp = 24;
58 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
60 state = pipe_config->base.state;
62 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
64 pipe_config->pbn = mst_pbn;
65 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
67 intel_link_compute_m_n(bpp, lane_count,
68 adjusted_mode->crtc_clock,
69 pipe_config->port_clock,
70 &pipe_config->dp_m_n);
72 pipe_config->dp_m_n.tu = slots;
78 static void intel_mst_disable_dp(struct intel_encoder *encoder,
79 struct intel_crtc_state *old_crtc_state,
80 struct drm_connector_state *old_conn_state)
82 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
83 struct intel_digital_port *intel_dig_port = intel_mst->primary;
84 struct intel_dp *intel_dp = &intel_dig_port->dp;
85 struct intel_connector *connector =
86 to_intel_connector(old_conn_state->connector);
89 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
91 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
93 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
95 DRM_ERROR("failed to update payload %d\n", ret);
99 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
100 struct intel_crtc_state *old_crtc_state,
101 struct drm_connector_state *old_conn_state)
103 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
104 struct intel_digital_port *intel_dig_port = intel_mst->primary;
105 struct intel_dp *intel_dp = &intel_dig_port->dp;
106 struct intel_connector *connector =
107 to_intel_connector(old_conn_state->connector);
109 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
112 drm_dp_check_act_status(&intel_dp->mst_mgr);
113 /* and this can also fail */
114 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
116 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
118 intel_dp->active_mst_links--;
120 intel_mst->connector = NULL;
121 if (intel_dp->active_mst_links == 0) {
122 intel_dig_port->base.post_disable(&intel_dig_port->base,
125 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
129 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
130 struct intel_crtc_state *pipe_config,
131 struct drm_connector_state *conn_state)
133 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
134 struct intel_digital_port *intel_dig_port = intel_mst->primary;
135 struct intel_dp *intel_dp = &intel_dig_port->dp;
136 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
137 enum port port = intel_dig_port->port;
138 struct intel_connector *connector =
139 to_intel_connector(conn_state->connector);
144 /* MST encoders are bound to a crtc, not to a connector,
145 * force the mapping here for get_hw_state.
147 connector->encoder = encoder;
148 intel_mst->connector = connector;
150 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
152 if (intel_dp->active_mst_links == 0) {
153 intel_ddi_clk_select(&intel_dig_port->base,
154 pipe_config->shared_dpll);
156 intel_prepare_dp_ddi_buffers(&intel_dig_port->base);
157 intel_dp_set_link_params(intel_dp,
158 pipe_config->port_clock,
159 pipe_config->lane_count,
162 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
164 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
166 intel_dp_start_link_train(intel_dp);
167 intel_dp_stop_link_train(intel_dp);
170 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
172 pipe_config->pbn, &slots);
174 DRM_ERROR("failed to allocate vcpi\n");
179 intel_dp->active_mst_links++;
180 temp = I915_READ(DP_TP_STATUS(port));
181 I915_WRITE(DP_TP_STATUS(port), temp);
183 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
186 static void intel_mst_enable_dp(struct intel_encoder *encoder,
187 struct intel_crtc_state *pipe_config,
188 struct drm_connector_state *conn_state)
190 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
191 struct intel_digital_port *intel_dig_port = intel_mst->primary;
192 struct intel_dp *intel_dp = &intel_dig_port->dp;
193 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
194 enum port port = intel_dig_port->port;
197 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
199 if (intel_wait_for_register(dev_priv,
201 DP_TP_STATUS_ACT_SENT,
202 DP_TP_STATUS_ACT_SENT,
204 DRM_ERROR("Timed out waiting for ACT sent\n");
206 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
208 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
211 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
214 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
215 *pipe = intel_mst->pipe;
216 if (intel_mst->connector)
221 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
222 struct intel_crtc_state *pipe_config)
224 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
225 struct intel_digital_port *intel_dig_port = intel_mst->primary;
226 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
227 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
228 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
231 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
232 if (temp & TRANS_DDI_PHSYNC)
233 flags |= DRM_MODE_FLAG_PHSYNC;
235 flags |= DRM_MODE_FLAG_NHSYNC;
236 if (temp & TRANS_DDI_PVSYNC)
237 flags |= DRM_MODE_FLAG_PVSYNC;
239 flags |= DRM_MODE_FLAG_NVSYNC;
241 switch (temp & TRANS_DDI_BPC_MASK) {
242 case TRANS_DDI_BPC_6:
243 pipe_config->pipe_bpp = 18;
245 case TRANS_DDI_BPC_8:
246 pipe_config->pipe_bpp = 24;
248 case TRANS_DDI_BPC_10:
249 pipe_config->pipe_bpp = 30;
251 case TRANS_DDI_BPC_12:
252 pipe_config->pipe_bpp = 36;
257 pipe_config->base.adjusted_mode.flags |= flags;
259 pipe_config->lane_count =
260 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
262 intel_dp_get_m_n(crtc, pipe_config);
264 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
267 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
269 struct intel_connector *intel_connector = to_intel_connector(connector);
270 struct intel_dp *intel_dp = intel_connector->mst_port;
275 return intel_connector_update_modes(connector, NULL);
278 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
279 ret = intel_connector_update_modes(connector, edid);
285 static enum drm_connector_status
286 intel_dp_mst_detect(struct drm_connector *connector, bool force)
288 struct intel_connector *intel_connector = to_intel_connector(connector);
289 struct intel_dp *intel_dp = intel_connector->mst_port;
292 return connector_status_disconnected;
293 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
297 intel_dp_mst_set_property(struct drm_connector *connector,
298 struct drm_property *property,
305 intel_dp_mst_connector_destroy(struct drm_connector *connector)
307 struct intel_connector *intel_connector = to_intel_connector(connector);
309 if (!IS_ERR_OR_NULL(intel_connector->edid))
310 kfree(intel_connector->edid);
312 drm_connector_cleanup(connector);
316 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
317 .dpms = drm_atomic_helper_connector_dpms,
318 .detect = intel_dp_mst_detect,
319 .fill_modes = drm_helper_probe_single_connector_modes,
320 .set_property = intel_dp_mst_set_property,
321 .atomic_get_property = intel_connector_atomic_get_property,
322 .late_register = intel_connector_register,
323 .early_unregister = intel_connector_unregister,
324 .destroy = intel_dp_mst_connector_destroy,
325 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
326 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
329 static int intel_dp_mst_get_modes(struct drm_connector *connector)
331 return intel_dp_mst_get_ddc_modes(connector);
334 static enum drm_mode_status
335 intel_dp_mst_mode_valid(struct drm_connector *connector,
336 struct drm_display_mode *mode)
338 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
340 /* TODO - validate mode against available PBN for link */
341 if (mode->clock < 10000)
342 return MODE_CLOCK_LOW;
344 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
345 return MODE_H_ILLEGAL;
347 if (mode->clock > max_dotclk)
348 return MODE_CLOCK_HIGH;
353 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
354 struct drm_connector_state *state)
356 struct intel_connector *intel_connector = to_intel_connector(connector);
357 struct intel_dp *intel_dp = intel_connector->mst_port;
358 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
362 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
365 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
367 struct intel_connector *intel_connector = to_intel_connector(connector);
368 struct intel_dp *intel_dp = intel_connector->mst_port;
371 return &intel_dp->mst_encoders[0]->base.base;
374 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
375 .get_modes = intel_dp_mst_get_modes,
376 .mode_valid = intel_dp_mst_mode_valid,
377 .atomic_best_encoder = intel_mst_atomic_best_encoder,
378 .best_encoder = intel_mst_best_encoder,
381 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
383 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
385 drm_encoder_cleanup(encoder);
389 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
390 .destroy = intel_dp_mst_encoder_destroy,
393 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
395 if (connector->encoder && connector->base.state->crtc) {
397 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
404 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
406 #ifdef CONFIG_DRM_FBDEV_EMULATION
407 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
410 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
415 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
417 #ifdef CONFIG_DRM_FBDEV_EMULATION
418 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
421 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
426 static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
428 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
429 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
430 struct drm_device *dev = intel_dig_port->base.base.dev;
431 struct intel_connector *intel_connector;
432 struct drm_connector *connector;
435 intel_connector = intel_connector_alloc();
436 if (!intel_connector)
439 connector = &intel_connector->base;
440 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
441 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
443 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
444 intel_connector->mst_port = intel_dp;
445 intel_connector->port = port;
447 for (i = PIPE_A; i <= PIPE_C; i++) {
448 drm_mode_connector_attach_encoder(&intel_connector->base,
449 &intel_dp->mst_encoders[i]->base.base);
451 intel_dp_add_properties(intel_dp, connector);
453 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
454 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
456 drm_mode_connector_set_path_property(connector, pathprop);
460 static void intel_dp_register_mst_connector(struct drm_connector *connector)
462 struct intel_connector *intel_connector = to_intel_connector(connector);
463 struct drm_device *dev = connector->dev;
465 drm_modeset_lock_all(dev);
466 intel_connector_add_to_fbdev(intel_connector);
467 drm_modeset_unlock_all(dev);
469 drm_connector_register(&intel_connector->base);
472 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
473 struct drm_connector *connector)
475 struct intel_connector *intel_connector = to_intel_connector(connector);
476 struct drm_device *dev = connector->dev;
478 drm_connector_unregister(connector);
480 /* need to nuke the connector */
481 drm_modeset_lock_all(dev);
482 intel_connector_remove_from_fbdev(intel_connector);
483 intel_connector->mst_port = NULL;
484 drm_modeset_unlock_all(dev);
486 drm_connector_unreference(&intel_connector->base);
490 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
492 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
493 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
494 struct drm_device *dev = intel_dig_port->base.base.dev;
496 drm_kms_helper_hotplug_event(dev);
499 static const struct drm_dp_mst_topology_cbs mst_cbs = {
500 .add_connector = intel_dp_add_mst_connector,
501 .register_connector = intel_dp_register_mst_connector,
502 .destroy_connector = intel_dp_destroy_mst_connector,
503 .hotplug = intel_dp_mst_hotplug,
506 static struct intel_dp_mst_encoder *
507 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
509 struct intel_dp_mst_encoder *intel_mst;
510 struct intel_encoder *intel_encoder;
511 struct drm_device *dev = intel_dig_port->base.base.dev;
513 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
518 intel_mst->pipe = pipe;
519 intel_encoder = &intel_mst->base;
520 intel_mst->primary = intel_dig_port;
522 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
523 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
525 intel_encoder->type = INTEL_OUTPUT_DP_MST;
526 intel_encoder->crtc_mask = 0x7;
527 intel_encoder->cloneable = 0;
529 intel_encoder->compute_config = intel_dp_mst_compute_config;
530 intel_encoder->disable = intel_mst_disable_dp;
531 intel_encoder->post_disable = intel_mst_post_disable_dp;
532 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
533 intel_encoder->enable = intel_mst_enable_dp;
534 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
535 intel_encoder->get_config = intel_dp_mst_enc_get_config;
542 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
545 struct intel_dp *intel_dp = &intel_dig_port->dp;
547 for (i = PIPE_A; i <= PIPE_C; i++)
548 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
553 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
555 struct intel_dp *intel_dp = &intel_dig_port->dp;
556 struct drm_device *dev = intel_dig_port->base.base.dev;
559 intel_dp->can_mst = true;
560 intel_dp->mst_mgr.cbs = &mst_cbs;
562 /* create encoders */
563 intel_dp_create_fake_mst_encoders(intel_dig_port);
564 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
566 intel_dp->can_mst = false;
573 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
575 struct intel_dp *intel_dp = &intel_dig_port->dp;
577 if (!intel_dp->can_mst)
580 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
581 /* encoders will get killed by normal cleanup */