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_crtc_helper.h>
30 #include <drm/drm_edid.h>
32 static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
33 struct intel_crtc_config *pipe_config)
35 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
36 struct intel_digital_port *intel_dig_port = intel_mst->primary;
37 struct intel_dp *intel_dp = &intel_dig_port->dp;
38 struct drm_device *dev = encoder->base.dev;
40 int lane_count, slots;
41 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
42 struct intel_connector *found = NULL, *intel_connector;
45 pipe_config->dp_encoder_is_mst = true;
46 pipe_config->has_pch_encoder = false;
47 pipe_config->has_dp_encoder = true;
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);
54 intel_dp->link_bw = intel_dp_max_link_bw(intel_dp);
55 intel_dp->lane_count = lane_count;
57 pipe_config->pipe_bpp = 24;
58 pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
60 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
61 if (intel_connector->new_encoder == encoder) {
62 found = intel_connector;
68 DRM_ERROR("can't find connector\n");
72 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
74 pipe_config->pbn = mst_pbn;
75 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
77 intel_link_compute_m_n(bpp, lane_count,
78 adjusted_mode->crtc_clock,
79 pipe_config->port_clock,
80 &pipe_config->dp_m_n);
82 pipe_config->dp_m_n.tu = slots;
87 static void intel_mst_disable_dp(struct intel_encoder *encoder)
89 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
90 struct intel_digital_port *intel_dig_port = intel_mst->primary;
91 struct intel_dp *intel_dp = &intel_dig_port->dp;
94 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
96 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
98 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
100 DRM_ERROR("failed to update payload %d\n", ret);
104 static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
106 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
107 struct intel_digital_port *intel_dig_port = intel_mst->primary;
108 struct intel_dp *intel_dp = &intel_dig_port->dp;
110 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
113 drm_dp_check_act_status(&intel_dp->mst_mgr);
114 /* and this can also fail */
115 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
117 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
119 intel_dp->active_mst_links--;
120 intel_mst->port = NULL;
121 if (intel_dp->active_mst_links == 0) {
122 intel_dig_port->base.post_disable(&intel_dig_port->base);
123 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
127 static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
129 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
130 struct intel_digital_port *intel_dig_port = intel_mst->primary;
131 struct intel_dp *intel_dp = &intel_dig_port->dp;
132 struct drm_device *dev = encoder->base.dev;
133 struct drm_i915_private *dev_priv = dev->dev_private;
134 enum port port = intel_dig_port->port;
137 struct intel_connector *found = NULL, *intel_connector;
139 struct drm_crtc *crtc = encoder->base.crtc;
140 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
142 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
143 if (intel_connector->new_encoder == encoder) {
144 found = intel_connector;
150 DRM_ERROR("can't find connector\n");
154 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
155 intel_mst->port = found->port;
157 if (intel_dp->active_mst_links == 0) {
158 enum port port = intel_ddi_get_encoder_port(encoder);
160 I915_WRITE(PORT_CLK_SEL(port), intel_crtc->config.ddi_pll_sel);
162 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
164 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
167 intel_dp_start_link_train(intel_dp);
168 intel_dp_complete_link_train(intel_dp);
169 intel_dp_stop_link_train(intel_dp);
172 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
173 intel_mst->port, intel_crtc->config.pbn, &slots);
175 DRM_ERROR("failed to allocate vcpi\n");
180 intel_dp->active_mst_links++;
181 temp = I915_READ(DP_TP_STATUS(port));
182 I915_WRITE(DP_TP_STATUS(port), temp);
184 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
187 static void intel_mst_enable_dp(struct intel_encoder *encoder)
189 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
190 struct intel_digital_port *intel_dig_port = intel_mst->primary;
191 struct intel_dp *intel_dp = &intel_dig_port->dp;
192 struct drm_device *dev = intel_dig_port->base.base.dev;
193 struct drm_i915_private *dev_priv = dev->dev_private;
194 enum port port = intel_dig_port->port;
197 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
199 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
201 DRM_ERROR("Timed out waiting for ACT sent\n");
203 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
205 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
208 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
211 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
212 *pipe = intel_mst->pipe;
218 static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
219 struct intel_crtc_config *pipe_config)
221 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
222 struct intel_digital_port *intel_dig_port = intel_mst->primary;
223 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
224 struct drm_device *dev = encoder->base.dev;
225 struct drm_i915_private *dev_priv = dev->dev_private;
226 enum transcoder cpu_transcoder = crtc->config.cpu_transcoder;
229 pipe_config->has_dp_encoder = true;
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->adjusted_mode.flags |= flags;
258 intel_dp_get_m_n(crtc, pipe_config);
260 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
263 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
265 struct intel_connector *intel_connector = to_intel_connector(connector);
266 struct intel_dp *intel_dp = intel_connector->mst_port;
270 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
274 ret = intel_connector_update_modes(connector, edid);
280 static enum drm_connector_status
281 intel_dp_mst_detect(struct drm_connector *connector, bool force)
283 struct intel_connector *intel_connector = to_intel_connector(connector);
284 struct intel_dp *intel_dp = intel_connector->mst_port;
286 return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
290 intel_dp_mst_set_property(struct drm_connector *connector,
291 struct drm_property *property,
298 intel_dp_mst_connector_destroy(struct drm_connector *connector)
300 struct intel_connector *intel_connector = to_intel_connector(connector);
302 if (!IS_ERR_OR_NULL(intel_connector->edid))
303 kfree(intel_connector->edid);
305 drm_connector_cleanup(connector);
309 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
310 .dpms = intel_connector_dpms,
311 .detect = intel_dp_mst_detect,
312 .fill_modes = drm_helper_probe_single_connector_modes,
313 .set_property = intel_dp_mst_set_property,
314 .destroy = intel_dp_mst_connector_destroy,
317 static int intel_dp_mst_get_modes(struct drm_connector *connector)
319 return intel_dp_mst_get_ddc_modes(connector);
322 static enum drm_mode_status
323 intel_dp_mst_mode_valid(struct drm_connector *connector,
324 struct drm_display_mode *mode)
326 /* TODO - validate mode against available PBN for link */
327 if (mode->clock < 10000)
328 return MODE_CLOCK_LOW;
330 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
331 return MODE_H_ILLEGAL;
336 static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
338 struct intel_connector *intel_connector = to_intel_connector(connector);
339 struct intel_dp *intel_dp = intel_connector->mst_port;
340 return &intel_dp->mst_encoders[0]->base.base;
343 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
344 .get_modes = intel_dp_mst_get_modes,
345 .mode_valid = intel_dp_mst_mode_valid,
346 .best_encoder = intel_mst_best_encoder,
349 static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
351 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
353 drm_encoder_cleanup(encoder);
357 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
358 .destroy = intel_dp_mst_encoder_destroy,
361 static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
363 if (connector->encoder) {
365 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
372 static void intel_connector_add_to_fbdev(struct intel_connector *connector)
374 #ifdef CONFIG_DRM_I915_FBDEV
375 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
376 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
380 static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
382 #ifdef CONFIG_DRM_I915_FBDEV
383 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
384 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
388 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)
390 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
391 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
392 struct drm_device *dev = intel_dig_port->base.base.dev;
393 struct intel_connector *intel_connector;
394 struct drm_connector *connector;
397 intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
398 if (!intel_connector)
401 connector = &intel_connector->base;
402 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
403 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
405 intel_connector->unregister = intel_connector_unregister;
406 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
407 intel_connector->mst_port = intel_dp;
408 intel_connector->port = port;
410 for (i = PIPE_A; i <= PIPE_C; i++) {
411 drm_mode_connector_attach_encoder(&intel_connector->base,
412 &intel_dp->mst_encoders[i]->base.base);
414 intel_dp_add_properties(intel_dp, connector);
416 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
417 drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
419 drm_mode_connector_set_path_property(connector, pathprop);
420 drm_reinit_primary_mode_group(dev);
421 mutex_lock(&dev->mode_config.mutex);
422 intel_connector_add_to_fbdev(intel_connector);
423 mutex_unlock(&dev->mode_config.mutex);
424 drm_connector_register(&intel_connector->base);
428 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
429 struct drm_connector *connector)
431 struct intel_connector *intel_connector = to_intel_connector(connector);
432 struct drm_device *dev = connector->dev;
433 /* need to nuke the connector */
434 mutex_lock(&dev->mode_config.mutex);
435 intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
436 mutex_unlock(&dev->mode_config.mutex);
438 intel_connector->unregister(intel_connector);
440 mutex_lock(&dev->mode_config.mutex);
441 intel_connector_remove_from_fbdev(intel_connector);
442 drm_connector_cleanup(connector);
443 mutex_unlock(&dev->mode_config.mutex);
445 drm_reinit_primary_mode_group(dev);
447 kfree(intel_connector);
451 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
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;
457 drm_kms_helper_hotplug_event(dev);
460 static struct drm_dp_mst_topology_cbs mst_cbs = {
461 .add_connector = intel_dp_add_mst_connector,
462 .destroy_connector = intel_dp_destroy_mst_connector,
463 .hotplug = intel_dp_mst_hotplug,
466 static struct intel_dp_mst_encoder *
467 intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
469 struct intel_dp_mst_encoder *intel_mst;
470 struct intel_encoder *intel_encoder;
471 struct drm_device *dev = intel_dig_port->base.base.dev;
473 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
478 intel_mst->pipe = pipe;
479 intel_encoder = &intel_mst->base;
480 intel_mst->primary = intel_dig_port;
482 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
483 DRM_MODE_ENCODER_DPMST);
485 intel_encoder->type = INTEL_OUTPUT_DP_MST;
486 intel_encoder->crtc_mask = 0x7;
487 intel_encoder->cloneable = 0;
489 intel_encoder->compute_config = intel_dp_mst_compute_config;
490 intel_encoder->disable = intel_mst_disable_dp;
491 intel_encoder->post_disable = intel_mst_post_disable_dp;
492 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
493 intel_encoder->enable = intel_mst_enable_dp;
494 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
495 intel_encoder->get_config = intel_dp_mst_enc_get_config;
502 intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
505 struct intel_dp *intel_dp = &intel_dig_port->dp;
507 for (i = PIPE_A; i <= PIPE_C; i++)
508 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
513 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
515 struct intel_dp *intel_dp = &intel_dig_port->dp;
516 struct drm_device *dev = intel_dig_port->base.base.dev;
519 intel_dp->can_mst = true;
520 intel_dp->mst_mgr.cbs = &mst_cbs;
522 /* create encoders */
523 intel_dp_create_fake_mst_encoders(intel_dig_port);
524 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
526 intel_dp->can_mst = false;
533 intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
535 struct intel_dp *intel_dp = &intel_dig_port->dp;
537 if (!intel_dp->can_mst)
540 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
541 /* encoders will get killed by normal cleanup */