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
)
36 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
37 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
38 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
39 struct drm_atomic_state
*state
;
41 int lane_count
, slots
;
42 const struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
43 struct drm_connector
*drm_connector
;
44 struct intel_connector
*connector
, *found
= NULL
;
45 struct drm_connector_state
*connector_state
;
48 pipe_config
->dp_encoder_is_mst
= true;
49 pipe_config
->has_pch_encoder
= false;
50 pipe_config
->has_dp_encoder
= true;
53 * for MST we always configure max link bw - the spec doesn't
54 * seem to suggest we should do otherwise.
56 lane_count
= drm_dp_max_lane_count(intel_dp
->dpcd
);
59 pipe_config
->lane_count
= lane_count
;
61 pipe_config
->pipe_bpp
= 24;
62 pipe_config
->port_clock
= intel_dp_max_link_rate(intel_dp
);
64 state
= pipe_config
->base
.state
;
66 for_each_connector_in_state(state
, drm_connector
, connector_state
, i
) {
67 connector
= to_intel_connector(drm_connector
);
69 if (connector_state
->best_encoder
== &encoder
->base
) {
76 DRM_ERROR("can't find connector\n");
80 if (drm_dp_mst_port_has_audio(&intel_dp
->mst_mgr
, found
->port
))
81 pipe_config
->has_audio
= true;
82 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->crtc_clock
, bpp
);
84 pipe_config
->pbn
= mst_pbn
;
85 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
87 intel_link_compute_m_n(bpp
, lane_count
,
88 adjusted_mode
->crtc_clock
,
89 pipe_config
->port_clock
,
90 &pipe_config
->dp_m_n
);
92 pipe_config
->dp_m_n
.tu
= slots
;
98 static void intel_mst_disable_dp(struct intel_encoder
*encoder
)
100 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
101 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
102 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
103 struct drm_device
*dev
= encoder
->base
.dev
;
104 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
105 struct drm_crtc
*crtc
= encoder
->base
.crtc
;
106 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
110 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
112 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, intel_mst
->port
);
114 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
116 DRM_ERROR("failed to update payload %d\n", ret
);
118 if (intel_crtc
->config
->has_audio
) {
119 intel_audio_codec_disable(encoder
);
120 intel_display_power_put(dev_priv
, POWER_DOMAIN_AUDIO
);
124 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
)
126 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
127 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
128 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
130 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
133 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
134 /* and this can also fail */
135 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
137 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, intel_mst
->port
);
139 intel_dp
->active_mst_links
--;
140 intel_mst
->port
= NULL
;
141 if (intel_dp
->active_mst_links
== 0) {
142 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
);
143 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
147 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
)
149 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
150 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
151 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
152 struct drm_device
*dev
= encoder
->base
.dev
;
153 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
154 enum port port
= intel_dig_port
->port
;
157 struct intel_connector
*found
= NULL
, *connector
;
159 struct drm_crtc
*crtc
= encoder
->base
.crtc
;
160 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
162 for_each_intel_connector(dev
, connector
) {
163 if (connector
->base
.state
->best_encoder
== &encoder
->base
) {
170 DRM_ERROR("can't find connector\n");
174 /* MST encoders are bound to a crtc, not to a connector,
175 * force the mapping here for get_hw_state.
177 found
->encoder
= encoder
;
179 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
180 intel_mst
->port
= found
->port
;
182 if (intel_dp
->active_mst_links
== 0) {
183 intel_prepare_ddi_buffer(&intel_dig_port
->base
);
185 intel_ddi_clk_select(&intel_dig_port
->base
, intel_crtc
->config
);
187 intel_dp_set_link_params(intel_dp
, intel_crtc
->config
);
189 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
191 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
193 intel_dp_start_link_train(intel_dp
);
194 intel_dp_stop_link_train(intel_dp
);
197 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
199 intel_crtc
->config
->pbn
, &slots
);
201 DRM_ERROR("failed to allocate vcpi\n");
206 intel_dp
->active_mst_links
++;
207 temp
= I915_READ(DP_TP_STATUS(port
));
208 I915_WRITE(DP_TP_STATUS(port
), temp
);
210 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
213 static void intel_mst_enable_dp(struct intel_encoder
*encoder
)
215 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
216 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
217 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
218 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
219 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
220 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
221 enum port port
= intel_dig_port
->port
;
224 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
226 if (wait_for((I915_READ(DP_TP_STATUS(port
)) & DP_TP_STATUS_ACT_SENT
),
228 DRM_ERROR("Timed out waiting for ACT sent\n");
230 ret
= drm_dp_check_act_status(&intel_dp
->mst_mgr
);
232 ret
= drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
234 if (crtc
->config
->has_audio
) {
235 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
236 pipe_name(crtc
->pipe
));
237 intel_display_power_get(dev_priv
, POWER_DOMAIN_AUDIO
);
238 intel_audio_codec_enable(encoder
);
242 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
*encoder
,
245 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
246 *pipe
= intel_mst
->pipe
;
252 static void intel_dp_mst_enc_get_config(struct intel_encoder
*encoder
,
253 struct intel_crtc_state
*pipe_config
)
255 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
256 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
257 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
258 struct drm_device
*dev
= encoder
->base
.dev
;
259 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
260 enum transcoder cpu_transcoder
= pipe_config
->cpu_transcoder
;
263 pipe_config
->has_dp_encoder
= true;
265 pipe_config
->has_audio
=
266 intel_ddi_is_audio_enabled(dev_priv
, crtc
);
268 temp
= I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder
));
269 if (temp
& TRANS_DDI_PHSYNC
)
270 flags
|= DRM_MODE_FLAG_PHSYNC
;
272 flags
|= DRM_MODE_FLAG_NHSYNC
;
273 if (temp
& TRANS_DDI_PVSYNC
)
274 flags
|= DRM_MODE_FLAG_PVSYNC
;
276 flags
|= DRM_MODE_FLAG_NVSYNC
;
278 switch (temp
& TRANS_DDI_BPC_MASK
) {
279 case TRANS_DDI_BPC_6
:
280 pipe_config
->pipe_bpp
= 18;
282 case TRANS_DDI_BPC_8
:
283 pipe_config
->pipe_bpp
= 24;
285 case TRANS_DDI_BPC_10
:
286 pipe_config
->pipe_bpp
= 30;
288 case TRANS_DDI_BPC_12
:
289 pipe_config
->pipe_bpp
= 36;
294 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
296 pipe_config
->lane_count
=
297 ((temp
& DDI_PORT_WIDTH_MASK
) >> DDI_PORT_WIDTH_SHIFT
) + 1;
299 intel_dp_get_m_n(crtc
, pipe_config
);
301 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
304 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
306 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
307 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
311 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
315 ret
= intel_connector_update_modes(connector
, edid
);
321 static enum drm_connector_status
322 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
324 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
325 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
327 return drm_dp_mst_detect_port(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
331 intel_dp_mst_set_property(struct drm_connector
*connector
,
332 struct drm_property
*property
,
339 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
341 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
343 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
344 kfree(intel_connector
->edid
);
346 drm_connector_cleanup(connector
);
350 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
351 .dpms
= drm_atomic_helper_connector_dpms
,
352 .detect
= intel_dp_mst_detect
,
353 .fill_modes
= drm_helper_probe_single_connector_modes
,
354 .set_property
= intel_dp_mst_set_property
,
355 .atomic_get_property
= intel_connector_atomic_get_property
,
356 .destroy
= intel_dp_mst_connector_destroy
,
357 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
358 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
361 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
363 return intel_dp_mst_get_ddc_modes(connector
);
366 static enum drm_mode_status
367 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
368 struct drm_display_mode
*mode
)
370 int max_dotclk
= to_i915(connector
->dev
)->max_dotclk_freq
;
372 /* TODO - validate mode against available PBN for link */
373 if (mode
->clock
< 10000)
374 return MODE_CLOCK_LOW
;
376 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
377 return MODE_H_ILLEGAL
;
379 if (mode
->clock
> max_dotclk
)
380 return MODE_CLOCK_HIGH
;
385 static struct drm_encoder
*intel_mst_atomic_best_encoder(struct drm_connector
*connector
,
386 struct drm_connector_state
*state
)
388 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
389 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
390 struct intel_crtc
*crtc
= to_intel_crtc(state
->crtc
);
392 return &intel_dp
->mst_encoders
[crtc
->pipe
]->base
.base
;
395 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
397 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
398 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
399 return &intel_dp
->mst_encoders
[0]->base
.base
;
402 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
403 .get_modes
= intel_dp_mst_get_modes
,
404 .mode_valid
= intel_dp_mst_mode_valid
,
405 .atomic_best_encoder
= intel_mst_atomic_best_encoder
,
406 .best_encoder
= intel_mst_best_encoder
,
409 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
411 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
413 drm_encoder_cleanup(encoder
);
417 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
418 .destroy
= intel_dp_mst_encoder_destroy
,
421 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
423 if (connector
->encoder
&& connector
->base
.state
->crtc
) {
425 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
432 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
434 #ifdef CONFIG_DRM_FBDEV_EMULATION
435 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
438 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
,
443 static void intel_connector_remove_from_fbdev(struct intel_connector
*connector
)
445 #ifdef CONFIG_DRM_FBDEV_EMULATION
446 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
449 drm_fb_helper_remove_one_connector(&dev_priv
->fbdev
->helper
,
454 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
)
456 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
457 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
458 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
459 struct intel_connector
*intel_connector
;
460 struct drm_connector
*connector
;
463 intel_connector
= intel_connector_alloc();
464 if (!intel_connector
)
467 connector
= &intel_connector
->base
;
468 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
469 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
471 intel_connector
->unregister
= intel_connector_unregister
;
472 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
473 intel_connector
->mst_port
= intel_dp
;
474 intel_connector
->port
= port
;
476 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
477 drm_mode_connector_attach_encoder(&intel_connector
->base
,
478 &intel_dp
->mst_encoders
[i
]->base
.base
);
480 intel_dp_add_properties(intel_dp
, connector
);
482 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
483 drm_object_attach_property(&connector
->base
, dev
->mode_config
.tile_property
, 0);
485 drm_mode_connector_set_path_property(connector
, pathprop
);
489 static void intel_dp_register_mst_connector(struct drm_connector
*connector
)
491 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
492 struct drm_device
*dev
= connector
->dev
;
493 drm_modeset_lock_all(dev
);
494 intel_connector_add_to_fbdev(intel_connector
);
495 drm_modeset_unlock_all(dev
);
496 drm_connector_register(&intel_connector
->base
);
499 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
500 struct drm_connector
*connector
)
502 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
503 struct drm_device
*dev
= connector
->dev
;
505 intel_connector
->unregister(intel_connector
);
507 /* need to nuke the connector */
508 drm_modeset_lock_all(dev
);
509 if (connector
->state
->crtc
) {
510 struct drm_mode_set set
;
513 memset(&set
, 0, sizeof(set
));
514 set
.crtc
= connector
->state
->crtc
,
516 ret
= drm_atomic_helper_set_config(&set
);
518 WARN(ret
, "Disabling mst crtc failed with %i\n", ret
);
521 intel_connector_remove_from_fbdev(intel_connector
);
522 drm_connector_cleanup(connector
);
523 drm_modeset_unlock_all(dev
);
525 kfree(intel_connector
);
529 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
531 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
532 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
533 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
535 drm_kms_helper_hotplug_event(dev
);
538 static const struct drm_dp_mst_topology_cbs mst_cbs
= {
539 .add_connector
= intel_dp_add_mst_connector
,
540 .register_connector
= intel_dp_register_mst_connector
,
541 .destroy_connector
= intel_dp_destroy_mst_connector
,
542 .hotplug
= intel_dp_mst_hotplug
,
545 static struct intel_dp_mst_encoder
*
546 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
548 struct intel_dp_mst_encoder
*intel_mst
;
549 struct intel_encoder
*intel_encoder
;
550 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
552 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
557 intel_mst
->pipe
= pipe
;
558 intel_encoder
= &intel_mst
->base
;
559 intel_mst
->primary
= intel_dig_port
;
561 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
562 DRM_MODE_ENCODER_DPMST
, NULL
);
564 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
565 intel_encoder
->crtc_mask
= 0x7;
566 intel_encoder
->cloneable
= 0;
568 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
569 intel_encoder
->disable
= intel_mst_disable_dp
;
570 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
571 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
572 intel_encoder
->enable
= intel_mst_enable_dp
;
573 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
574 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
581 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
584 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
586 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
587 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
592 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
594 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
595 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
598 intel_dp
->can_mst
= true;
599 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
601 /* create encoders */
602 intel_dp_create_fake_mst_encoders(intel_dig_port
);
603 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
->dev
, &intel_dp
->aux
, 16, 3, conn_base_id
);
605 intel_dp
->can_mst
= false;
612 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
614 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
616 if (!intel_dp
->can_mst
)
619 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
620 /* encoders will get killed by normal cleanup */