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_connector *connector = conn_state->connector;
41 void *port = to_intel_connector(connector)->port;
42 struct drm_atomic_state *state = pipe_config->base.state;
44 int lane_count, slots = 0;
45 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
47 bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
48 DP_DPCD_QUIRK_LIMITED_M_N);
50 pipe_config->has_pch_encoder = false;
52 if (intel_dp->compliance.test_data.bpc) {
53 bpp = intel_dp->compliance.test_data.bpc * 3;
54 DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
58 * for MST we always configure max link bw - the spec doesn't
59 * seem to suggest we should do otherwise.
61 lane_count = intel_dp_max_lane_count(intel_dp);
63 pipe_config->lane_count = lane_count;
65 pipe_config->pipe_bpp = bpp;
67 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
69 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
70 pipe_config->has_audio = true;
72 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
73 pipe_config->pbn = mst_pbn;
75 /* Zombie connectors can't have VCPI slots */
76 if (READ_ONCE(connector->registered)) {
77 slots = drm_dp_atomic_find_vcpi_slots(state,
82 DRM_DEBUG_KMS("failed finding vcpi slots:%d\n",
88 intel_link_compute_m_n(bpp, lane_count,
89 adjusted_mode->crtc_clock,
90 pipe_config->port_clock,
94 pipe_config->dp_m_n.tu = slots;
99 static int intel_dp_mst_atomic_check(struct drm_connector *connector,
100 struct drm_connector_state *new_conn_state)
102 struct drm_atomic_state *state = new_conn_state->state;
103 struct drm_connector_state *old_conn_state;
104 struct drm_crtc *old_crtc;
105 struct drm_crtc_state *crtc_state;
108 old_conn_state = drm_atomic_get_old_connector_state(state, connector);
109 old_crtc = old_conn_state->crtc;
113 crtc_state = drm_atomic_get_new_crtc_state(state, old_crtc);
114 slots = to_intel_crtc_state(crtc_state)->dp_m_n.tu;
115 if (drm_atomic_crtc_needs_modeset(crtc_state) && slots > 0) {
116 struct drm_dp_mst_topology_mgr *mgr;
117 struct drm_encoder *old_encoder;
119 old_encoder = old_conn_state->best_encoder;
120 mgr = &enc_to_mst(old_encoder)->primary->dp.mst_mgr;
122 ret = drm_dp_atomic_release_vcpi_slots(state, mgr, slots);
124 DRM_DEBUG_KMS("failed releasing %d vcpi slots:%d\n", slots, ret);
126 to_intel_crtc_state(crtc_state)->dp_m_n.tu = 0;
131 static void intel_mst_disable_dp(struct intel_encoder *encoder,
132 struct intel_crtc_state *old_crtc_state,
133 struct drm_connector_state *old_conn_state)
135 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
136 struct intel_digital_port *intel_dig_port = intel_mst->primary;
137 struct intel_dp *intel_dp = &intel_dig_port->dp;
138 struct intel_connector *connector =
139 to_intel_connector(old_conn_state->connector);
142 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
144 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
146 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
148 DRM_ERROR("failed to update payload %d\n", ret);
150 if (old_crtc_state->has_audio)
151 intel_audio_codec_disable(encoder);
154 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
155 struct intel_crtc_state *old_crtc_state,
156 struct drm_connector_state *old_conn_state)
158 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
159 struct intel_digital_port *intel_dig_port = intel_mst->primary;
160 struct intel_dp *intel_dp = &intel_dig_port->dp;
161 struct intel_connector *connector =
162 to_intel_connector(old_conn_state->connector);
164 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
167 drm_dp_check_act_status(&intel_dp->mst_mgr);
168 /* and this can also fail */
169 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
171 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
173 intel_dp->active_mst_links--;
175 intel_mst->connector = NULL;
176 if (intel_dp->active_mst_links == 0) {
177 intel_dig_port->base.post_disable(&intel_dig_port->base,
180 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
184 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
185 struct intel_crtc_state *pipe_config,
186 struct drm_connector_state *conn_state)
188 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
189 struct intel_digital_port *intel_dig_port = intel_mst->primary;
190 struct intel_dp *intel_dp = &intel_dig_port->dp;
191 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
192 enum port port = intel_dig_port->port;
193 struct intel_connector *connector =
194 to_intel_connector(conn_state->connector);
198 /* MST encoders are bound to a crtc, not to a connector,
199 * force the mapping here for get_hw_state.
201 connector->encoder = encoder;
202 intel_mst->connector = connector;
204 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
206 if (intel_dp->active_mst_links == 0)
207 intel_dig_port->base.pre_enable(&intel_dig_port->base,
210 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
213 pipe_config->dp_m_n.tu);
215 DRM_ERROR("failed to allocate vcpi\n");
220 intel_dp->active_mst_links++;
221 temp = I915_READ(DP_TP_STATUS(port));
222 I915_WRITE(DP_TP_STATUS(port), temp);
224 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
227 static void intel_mst_enable_dp(struct intel_encoder *encoder,
228 struct intel_crtc_state *pipe_config,
229 struct drm_connector_state *conn_state)
231 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
232 struct intel_digital_port *intel_dig_port = intel_mst->primary;
233 struct intel_dp *intel_dp = &intel_dig_port->dp;
234 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
235 enum port port = intel_dig_port->port;
238 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
240 if (intel_wait_for_register(dev_priv,
242 DP_TP_STATUS_ACT_SENT,
243 DP_TP_STATUS_ACT_SENT,
245 DRM_ERROR("Timed out waiting for ACT sent\n");
247 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
249 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
250 if (pipe_config->has_audio)
251 intel_audio_codec_enable(encoder, pipe_config, conn_state);
254 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
257 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
258 *pipe = intel_mst->pipe;
259 if (intel_mst->connector)
264 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
265 struct intel_crtc_state *pipe_config)
267 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
268 struct intel_digital_port *intel_dig_port = intel_mst->primary;
269 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
270 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
271 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
274 pipe_config->has_audio =
275 intel_ddi_is_audio_enabled(dev_priv, crtc);
277 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
278 if (temp & TRANS_DDI_PHSYNC)
279 flags |= DRM_MODE_FLAG_PHSYNC;
281 flags |= DRM_MODE_FLAG_NHSYNC;
282 if (temp & TRANS_DDI_PVSYNC)
283 flags |= DRM_MODE_FLAG_PVSYNC;
285 flags |= DRM_MODE_FLAG_NVSYNC;
287 switch (temp & TRANS_DDI_BPC_MASK) {
288 case TRANS_DDI_BPC_6:
289 pipe_config->pipe_bpp = 18;
291 case TRANS_DDI_BPC_8:
292 pipe_config->pipe_bpp = 24;
294 case TRANS_DDI_BPC_10:
295 pipe_config->pipe_bpp = 30;
297 case TRANS_DDI_BPC_12:
298 pipe_config->pipe_bpp = 36;
303 pipe_config->base.adjusted_mode.flags |= flags;
305 pipe_config->lane_count =
306 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
308 intel_dp_get_m_n(crtc, pipe_config);
310 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
313 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
315 struct intel_connector *intel_connector = to_intel_connector(connector);
316 struct intel_dp *intel_dp = intel_connector->mst_port;
320 if (!READ_ONCE(connector->registered))
321 return intel_connector_update_modes(connector, NULL);
323 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
324 ret = intel_connector_update_modes(connector, edid);
330 static enum drm_connector_status
331 intel_dp_mst_detect(struct drm_connector *connector, bool force)
333 struct intel_connector *intel_connector = to_intel_connector(connector);
334 struct intel_dp *intel_dp = intel_connector->mst_port;
336 if (!READ_ONCE(connector->registered))
337 return connector_status_disconnected;
338 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr,
339 intel_connector->port);
343 intel_dp_mst_connector_destroy(struct drm_connector *connector)
345 struct intel_connector *intel_connector = to_intel_connector(connector);
347 if (!IS_ERR_OR_NULL(intel_connector->edid))
348 kfree(intel_connector->edid);
350 drm_connector_cleanup(connector);
354 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
355 .detect = intel_dp_mst_detect,
356 .fill_modes = drm_helper_probe_single_connector_modes,
357 .late_register = intel_connector_register,
358 .early_unregister = intel_connector_unregister,
359 .destroy = intel_dp_mst_connector_destroy,
360 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
361 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
364 static int intel_dp_mst_get_modes(struct drm_connector *connector)
366 return intel_dp_mst_get_ddc_modes(connector);
369 static enum drm_mode_status
370 intel_dp_mst_mode_valid(struct drm_connector *connector,
371 struct drm_display_mode *mode)
373 struct intel_connector *intel_connector = to_intel_connector(connector);
374 struct intel_dp *intel_dp = intel_connector->mst_port;
375 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
376 int bpp = 24; /* MST uses fixed bpp */
377 int max_rate, mode_rate, max_lanes, max_link_clock;
379 if (!READ_ONCE(connector->registered))
382 max_link_clock = intel_dp_max_link_rate(intel_dp);
383 max_lanes = intel_dp_max_lane_count(intel_dp);
385 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
386 mode_rate = intel_dp_link_required(mode->clock, bpp);
388 /* TODO - validate mode against available PBN for link */
389 if (mode->clock < 10000)
390 return MODE_CLOCK_LOW;
392 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
393 return MODE_H_ILLEGAL;
395 if (mode_rate > max_rate || mode->clock > max_dotclk)
396 return MODE_CLOCK_HIGH;
401 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
402 struct drm_connector_state *state)
404 struct intel_connector *intel_connector = to_intel_connector(connector);
405 struct intel_dp *intel_dp = intel_connector->mst_port;
406 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
408 if (!READ_ONCE(connector->registered))
410 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
413 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
415 struct intel_connector *intel_connector = to_intel_connector(connector);
416 struct intel_dp *intel_dp = intel_connector->mst_port;
419 return &intel_dp->mst_encoders[0]->base.base;
422 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
423 .get_modes = intel_dp_mst_get_modes,
424 .mode_valid = intel_dp_mst_mode_valid,
425 .atomic_best_encoder = intel_mst_atomic_best_encoder,
426 .best_encoder = intel_mst_best_encoder,
427 .atomic_check = intel_dp_mst_atomic_check,
430 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
432 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
434 drm_encoder_cleanup(encoder);
438 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
439 .destroy = intel_dp_mst_encoder_destroy,
442 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
444 if (connector->encoder && connector->base.state->crtc) {
446 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
453 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)
455 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
456 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
457 struct drm_device *dev = intel_dig_port->base.base.dev;
458 struct intel_connector *intel_connector;
459 struct drm_connector *connector;
462 intel_connector = intel_connector_alloc();
463 if (!intel_connector)
466 connector = &intel_connector->base;
467 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
468 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
470 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
471 intel_connector->mst_port = intel_dp;
472 intel_connector->port = port;
474 for (i = PIPE_A; i <= PIPE_C; i++) {
475 drm_mode_connector_attach_encoder(&intel_connector->base,
476 &intel_dp->mst_encoders[i]->base.base);
479 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
480 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
482 drm_mode_connector_set_path_property(connector, pathprop);
486 static void intel_dp_register_mst_connector(struct drm_connector *connector)
488 struct drm_i915_private *dev_priv = to_i915(connector->dev);
491 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
494 drm_connector_register(connector);
497 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
498 struct drm_connector *connector)
500 struct drm_i915_private *dev_priv = to_i915(connector->dev);
502 drm_connector_unregister(connector);
505 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
508 drm_connector_unreference(connector);
512 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
514 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
515 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
516 struct drm_device *dev = intel_dig_port->base.base.dev;
518 drm_kms_helper_hotplug_event(dev);
521 static const struct drm_dp_mst_topology_cbs mst_cbs = {
522 .add_connector = intel_dp_add_mst_connector,
523 .register_connector = intel_dp_register_mst_connector,
524 .destroy_connector = intel_dp_destroy_mst_connector,
525 .hotplug = intel_dp_mst_hotplug,
528 static struct intel_dp_mst_encoder *
529 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
531 struct intel_dp_mst_encoder *intel_mst;
532 struct intel_encoder *intel_encoder;
533 struct drm_device *dev = intel_dig_port->base.base.dev;
535 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
540 intel_mst->pipe = pipe;
541 intel_encoder = &intel_mst->base;
542 intel_mst->primary = intel_dig_port;
544 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
545 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
547 intel_encoder->type = INTEL_OUTPUT_DP_MST;
548 intel_encoder->power_domain = intel_dig_port->base.power_domain;
549 intel_encoder->port = intel_dig_port->port;
550 intel_encoder->crtc_mask = 0x7;
551 intel_encoder->cloneable = 0;
553 intel_encoder->compute_config = intel_dp_mst_compute_config;
554 intel_encoder->disable = intel_mst_disable_dp;
555 intel_encoder->post_disable = intel_mst_post_disable_dp;
556 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
557 intel_encoder->enable = intel_mst_enable_dp;
558 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
559 intel_encoder->get_config = intel_dp_mst_enc_get_config;
566 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
569 struct intel_dp *intel_dp = &intel_dig_port->dp;
571 for (i = PIPE_A; i <= PIPE_C; i++)
572 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
577 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
579 struct intel_dp *intel_dp = &intel_dig_port->dp;
580 struct drm_device *dev = intel_dig_port->base.base.dev;
583 intel_dp->can_mst = true;
584 intel_dp->mst_mgr.cbs = &mst_cbs;
586 /* create encoders */
587 intel_dp_create_fake_mst_encoders(intel_dig_port);
588 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
589 &intel_dp->aux, 16, 3, conn_base_id);
591 intel_dp->can_mst = false;
598 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
600 struct intel_dp *intel_dp = &intel_dig_port->dp;
602 if (!intel_dp->can_mst)
605 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
606 /* encoders will get killed by normal cleanup */