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 intel_connector *connector =
41 to_intel_connector(conn_state->connector);
42 struct drm_atomic_state *state;
44 int lane_count, slots;
45 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
48 pipe_config->has_pch_encoder = false;
51 * for MST we always configure max link bw - the spec doesn't
52 * seem to suggest we should do otherwise.
54 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
56 pipe_config->lane_count = lane_count;
58 pipe_config->pipe_bpp = 24;
59 pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
61 state = pipe_config->base.state;
63 if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
64 pipe_config->has_audio = true;
65 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
67 pipe_config->pbn = mst_pbn;
68 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
70 intel_link_compute_m_n(bpp, lane_count,
71 adjusted_mode->crtc_clock,
72 pipe_config->port_clock,
73 &pipe_config->dp_m_n);
75 pipe_config->dp_m_n.tu = slots;
81 static void intel_mst_disable_dp(struct intel_encoder *encoder,
82 struct intel_crtc_state *old_crtc_state,
83 struct drm_connector_state *old_conn_state)
85 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
86 struct intel_digital_port *intel_dig_port = intel_mst->primary;
87 struct intel_dp *intel_dp = &intel_dig_port->dp;
88 struct intel_connector *connector =
89 to_intel_connector(old_conn_state->connector);
90 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
93 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
95 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, connector->port);
97 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
99 DRM_ERROR("failed to update payload %d\n", ret);
101 if (old_crtc_state->has_audio) {
102 intel_audio_codec_disable(encoder);
103 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
107 static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
108 struct intel_crtc_state *old_crtc_state,
109 struct drm_connector_state *old_conn_state)
111 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
112 struct intel_digital_port *intel_dig_port = intel_mst->primary;
113 struct intel_dp *intel_dp = &intel_dig_port->dp;
114 struct intel_connector *connector =
115 to_intel_connector(old_conn_state->connector);
117 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
120 drm_dp_check_act_status(&intel_dp->mst_mgr);
121 /* and this can also fail */
122 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
124 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, connector->port);
126 intel_dp->active_mst_links--;
128 intel_mst->connector = NULL;
129 if (intel_dp->active_mst_links == 0) {
130 intel_dig_port->base.post_disable(&intel_dig_port->base,
133 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
137 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
138 struct intel_crtc_state *pipe_config,
139 struct drm_connector_state *conn_state)
141 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
142 struct intel_digital_port *intel_dig_port = intel_mst->primary;
143 struct intel_dp *intel_dp = &intel_dig_port->dp;
144 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
145 enum port port = intel_dig_port->port;
146 struct intel_connector *connector =
147 to_intel_connector(conn_state->connector);
152 /* MST encoders are bound to a crtc, not to a connector,
153 * force the mapping here for get_hw_state.
155 connector->encoder = encoder;
156 intel_mst->connector = connector;
158 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
160 if (intel_dp->active_mst_links == 0) {
161 intel_ddi_clk_select(&intel_dig_port->base,
162 pipe_config->shared_dpll);
164 intel_prepare_dp_ddi_buffers(&intel_dig_port->base);
165 intel_dp_set_link_params(intel_dp,
166 pipe_config->port_clock,
167 pipe_config->lane_count,
170 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
172 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
174 intel_dp_start_link_train(intel_dp);
175 intel_dp_stop_link_train(intel_dp);
178 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
180 pipe_config->pbn, &slots);
182 DRM_ERROR("failed to allocate vcpi\n");
187 intel_dp->active_mst_links++;
188 temp = I915_READ(DP_TP_STATUS(port));
189 I915_WRITE(DP_TP_STATUS(port), temp);
191 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
194 static void intel_mst_enable_dp(struct intel_encoder *encoder,
195 struct intel_crtc_state *pipe_config,
196 struct drm_connector_state *conn_state)
198 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
199 struct intel_digital_port *intel_dig_port = intel_mst->primary;
200 struct intel_dp *intel_dp = &intel_dig_port->dp;
201 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
202 enum port port = intel_dig_port->port;
205 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
207 if (intel_wait_for_register(dev_priv,
209 DP_TP_STATUS_ACT_SENT,
210 DP_TP_STATUS_ACT_SENT,
212 DRM_ERROR("Timed out waiting for ACT sent\n");
214 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
216 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
217 if (pipe_config->has_audio) {
218 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
219 intel_audio_codec_enable(encoder, pipe_config, conn_state);
223 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
226 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
227 *pipe = intel_mst->pipe;
228 if (intel_mst->connector)
233 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
234 struct intel_crtc_state *pipe_config)
236 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
237 struct intel_digital_port *intel_dig_port = intel_mst->primary;
238 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
239 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
240 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
243 pipe_config->has_audio =
244 intel_ddi_is_audio_enabled(dev_priv, crtc);
246 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
247 if (temp & TRANS_DDI_PHSYNC)
248 flags |= DRM_MODE_FLAG_PHSYNC;
250 flags |= DRM_MODE_FLAG_NHSYNC;
251 if (temp & TRANS_DDI_PVSYNC)
252 flags |= DRM_MODE_FLAG_PVSYNC;
254 flags |= DRM_MODE_FLAG_NVSYNC;
256 switch (temp & TRANS_DDI_BPC_MASK) {
257 case TRANS_DDI_BPC_6:
258 pipe_config->pipe_bpp = 18;
260 case TRANS_DDI_BPC_8:
261 pipe_config->pipe_bpp = 24;
263 case TRANS_DDI_BPC_10:
264 pipe_config->pipe_bpp = 30;
266 case TRANS_DDI_BPC_12:
267 pipe_config->pipe_bpp = 36;
272 pipe_config->base.adjusted_mode.flags |= flags;
274 pipe_config->lane_count =
275 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
277 intel_dp_get_m_n(crtc, pipe_config);
279 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
282 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
284 struct intel_connector *intel_connector = to_intel_connector(connector);
285 struct intel_dp *intel_dp = intel_connector->mst_port;
290 return intel_connector_update_modes(connector, NULL);
293 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
294 ret = intel_connector_update_modes(connector, edid);
300 static enum drm_connector_status
301 intel_dp_mst_detect(struct drm_connector *connector, bool force)
303 struct intel_connector *intel_connector = to_intel_connector(connector);
304 struct intel_dp *intel_dp = intel_connector->mst_port;
307 return connector_status_disconnected;
308 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
312 intel_dp_mst_set_property(struct drm_connector *connector,
313 struct drm_property *property,
320 intel_dp_mst_connector_destroy(struct drm_connector *connector)
322 struct intel_connector *intel_connector = to_intel_connector(connector);
324 if (!IS_ERR_OR_NULL(intel_connector->edid))
325 kfree(intel_connector->edid);
327 drm_connector_cleanup(connector);
331 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
332 .dpms = drm_atomic_helper_connector_dpms,
333 .detect = intel_dp_mst_detect,
334 .fill_modes = drm_helper_probe_single_connector_modes,
335 .set_property = intel_dp_mst_set_property,
336 .atomic_get_property = intel_connector_atomic_get_property,
337 .late_register = intel_connector_register,
338 .early_unregister = intel_connector_unregister,
339 .destroy = intel_dp_mst_connector_destroy,
340 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
341 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
344 static int intel_dp_mst_get_modes(struct drm_connector *connector)
346 return intel_dp_mst_get_ddc_modes(connector);
349 static enum drm_mode_status
350 intel_dp_mst_mode_valid(struct drm_connector *connector,
351 struct drm_display_mode *mode)
353 struct intel_connector *intel_connector = to_intel_connector(connector);
354 struct intel_dp *intel_dp = intel_connector->mst_port;
355 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
356 int bpp = 24; /* MST uses fixed bpp */
357 int max_rate, mode_rate, max_lanes, max_link_clock;
359 max_link_clock = intel_dp_max_link_rate(intel_dp);
360 max_lanes = drm_dp_max_lane_count(intel_dp->dpcd);
362 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
363 mode_rate = intel_dp_link_required(mode->clock, bpp);
365 /* TODO - validate mode against available PBN for link */
366 if (mode->clock < 10000)
367 return MODE_CLOCK_LOW;
369 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
370 return MODE_H_ILLEGAL;
372 if (mode_rate > max_rate || mode->clock > max_dotclk)
373 return MODE_CLOCK_HIGH;
378 static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
379 struct drm_connector_state *state)
381 struct intel_connector *intel_connector = to_intel_connector(connector);
382 struct intel_dp *intel_dp = intel_connector->mst_port;
383 struct intel_crtc *crtc = to_intel_crtc(state->crtc);
387 return &intel_dp->mst_encoders[crtc->pipe]->base.base;
390 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
392 struct intel_connector *intel_connector = to_intel_connector(connector);
393 struct intel_dp *intel_dp = intel_connector->mst_port;
396 return &intel_dp->mst_encoders[0]->base.base;
399 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
400 .get_modes = intel_dp_mst_get_modes,
401 .mode_valid = intel_dp_mst_mode_valid,
402 .atomic_best_encoder = intel_mst_atomic_best_encoder,
403 .best_encoder = intel_mst_best_encoder,
406 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
408 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
410 drm_encoder_cleanup(encoder);
414 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
415 .destroy = intel_dp_mst_encoder_destroy,
418 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
420 if (connector->encoder && connector->base.state->crtc) {
422 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
429 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
431 #ifdef CONFIG_DRM_FBDEV_EMULATION
432 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
435 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
440 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
442 #ifdef CONFIG_DRM_FBDEV_EMULATION
443 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
446 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
451 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)
453 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
454 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
455 struct drm_device *dev = intel_dig_port->base.base.dev;
456 struct intel_connector *intel_connector;
457 struct drm_connector *connector;
460 intel_connector = intel_connector_alloc();
461 if (!intel_connector)
464 connector = &intel_connector->base;
465 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
466 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
468 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
469 intel_connector->mst_port = intel_dp;
470 intel_connector->port = port;
472 for (i = PIPE_A; i <= PIPE_C; i++) {
473 drm_mode_connector_attach_encoder(&intel_connector->base,
474 &intel_dp->mst_encoders[i]->base.base);
476 intel_dp_add_properties(intel_dp, connector);
478 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
479 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
481 drm_mode_connector_set_path_property(connector, pathprop);
485 static void intel_dp_register_mst_connector(struct drm_connector *connector)
487 struct intel_connector *intel_connector = to_intel_connector(connector);
488 struct drm_device *dev = connector->dev;
490 drm_modeset_lock_all(dev);
491 intel_connector_add_to_fbdev(intel_connector);
492 drm_modeset_unlock_all(dev);
494 drm_connector_register(&intel_connector->base);
497 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
498 struct drm_connector *connector)
500 struct intel_connector *intel_connector = to_intel_connector(connector);
501 struct drm_device *dev = connector->dev;
503 drm_connector_unregister(connector);
505 /* need to nuke the connector */
506 drm_modeset_lock_all(dev);
507 intel_connector_remove_from_fbdev(intel_connector);
508 intel_connector->mst_port = NULL;
509 drm_modeset_unlock_all(dev);
511 drm_connector_unreference(&intel_connector->base);
515 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
517 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
518 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
519 struct drm_device *dev = intel_dig_port->base.base.dev;
521 drm_kms_helper_hotplug_event(dev);
524 static const struct drm_dp_mst_topology_cbs mst_cbs = {
525 .add_connector = intel_dp_add_mst_connector,
526 .register_connector = intel_dp_register_mst_connector,
527 .destroy_connector = intel_dp_destroy_mst_connector,
528 .hotplug = intel_dp_mst_hotplug,
531 static struct intel_dp_mst_encoder *
532 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
534 struct intel_dp_mst_encoder *intel_mst;
535 struct intel_encoder *intel_encoder;
536 struct drm_device *dev = intel_dig_port->base.base.dev;
538 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
543 intel_mst->pipe = pipe;
544 intel_encoder = &intel_mst->base;
545 intel_mst->primary = intel_dig_port;
547 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
548 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
550 intel_encoder->type = INTEL_OUTPUT_DP_MST;
551 intel_encoder->port = intel_dig_port->port;
552 intel_encoder->crtc_mask = 0x7;
553 intel_encoder->cloneable = 0;
555 intel_encoder->compute_config = intel_dp_mst_compute_config;
556 intel_encoder->disable = intel_mst_disable_dp;
557 intel_encoder->post_disable = intel_mst_post_disable_dp;
558 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
559 intel_encoder->enable = intel_mst_enable_dp;
560 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
561 intel_encoder->get_config = intel_dp_mst_enc_get_config;
568 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
571 struct intel_dp *intel_dp = &intel_dig_port->dp;
573 for (i = PIPE_A; i <= PIPE_C; i++)
574 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
579 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
581 struct intel_dp *intel_dp = &intel_dig_port->dp;
582 struct drm_device *dev = intel_dig_port->base.base.dev;
585 intel_dp->can_mst = true;
586 intel_dp->mst_mgr.cbs = &mst_cbs;
588 /* create encoders */
589 intel_dp_create_fake_mst_encoders(intel_dig_port);
590 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
591 &intel_dp->aux, 16, 3, conn_base_id);
593 intel_dp->can_mst = false;
600 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
602 struct intel_dp *intel_dp = &intel_dig_port->dp;
604 if (!intel_dp->can_mst)
607 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
608 /* encoders will get killed by normal cleanup */