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;
52 * for MST we always configure max link bw - the spec doesn't
53 * seem to suggest we should do otherwise.
55 lane_count
= drm_dp_max_lane_count(intel_dp
->dpcd
);
58 pipe_config
->lane_count
= lane_count
;
60 pipe_config
->pipe_bpp
= 24;
61 pipe_config
->port_clock
= intel_dp_max_link_rate(intel_dp
);
63 state
= pipe_config
->base
.state
;
65 for_each_connector_in_state(state
, drm_connector
, connector_state
, i
) {
66 connector
= to_intel_connector(drm_connector
);
68 if (connector_state
->best_encoder
== &encoder
->base
) {
75 DRM_ERROR("can't find connector\n");
79 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->crtc_clock
, bpp
);
81 pipe_config
->pbn
= mst_pbn
;
82 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
84 intel_link_compute_m_n(bpp
, lane_count
,
85 adjusted_mode
->crtc_clock
,
86 pipe_config
->port_clock
,
87 &pipe_config
->dp_m_n
);
89 pipe_config
->dp_m_n
.tu
= slots
;
95 static void intel_mst_disable_dp(struct intel_encoder
*encoder
)
97 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
98 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
99 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
102 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
104 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, intel_mst
->connector
->port
);
106 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
108 DRM_ERROR("failed to update payload %d\n", ret
);
112 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
)
114 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
115 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
116 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
118 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
121 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
122 /* and this can also fail */
123 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
125 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, intel_mst
->connector
->port
);
127 intel_dp
->active_mst_links
--;
129 intel_mst
->connector
= NULL
;
130 if (intel_dp
->active_mst_links
== 0) {
131 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
);
132 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
136 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
)
138 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
139 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
140 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
141 struct drm_device
*dev
= encoder
->base
.dev
;
142 struct drm_i915_private
*dev_priv
= to_i915(dev
);
143 enum port port
= intel_dig_port
->port
;
146 struct intel_connector
*found
= NULL
, *connector
;
148 struct drm_crtc
*crtc
= encoder
->base
.crtc
;
149 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
151 for_each_intel_connector(dev
, connector
) {
152 if (connector
->base
.state
->best_encoder
== &encoder
->base
) {
159 DRM_ERROR("can't find connector\n");
163 /* MST encoders are bound to a crtc, not to a connector,
164 * force the mapping here for get_hw_state.
166 found
->encoder
= encoder
;
168 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
170 intel_mst
->connector
= found
;
172 if (intel_dp
->active_mst_links
== 0) {
173 intel_ddi_clk_select(&intel_dig_port
->base
, intel_crtc
->config
);
175 intel_prepare_dp_ddi_buffers(&intel_dig_port
->base
);
177 intel_dp_set_link_params(intel_dp
, intel_crtc
->config
);
179 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
181 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
183 intel_dp_start_link_train(intel_dp
);
184 intel_dp_stop_link_train(intel_dp
);
187 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
188 intel_mst
->connector
->port
,
189 intel_crtc
->config
->pbn
, &slots
);
191 DRM_ERROR("failed to allocate vcpi\n");
196 intel_dp
->active_mst_links
++;
197 temp
= I915_READ(DP_TP_STATUS(port
));
198 I915_WRITE(DP_TP_STATUS(port
), temp
);
200 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
203 static void intel_mst_enable_dp(struct intel_encoder
*encoder
)
205 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
206 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
207 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
208 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
209 struct drm_i915_private
*dev_priv
= to_i915(dev
);
210 enum port port
= intel_dig_port
->port
;
213 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
215 if (intel_wait_for_register(dev_priv
,
217 DP_TP_STATUS_ACT_SENT
,
218 DP_TP_STATUS_ACT_SENT
,
220 DRM_ERROR("Timed out waiting for ACT sent\n");
222 ret
= drm_dp_check_act_status(&intel_dp
->mst_mgr
);
224 ret
= drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
227 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
*encoder
,
230 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
231 *pipe
= intel_mst
->pipe
;
232 if (intel_mst
->connector
)
237 static void intel_dp_mst_enc_get_config(struct intel_encoder
*encoder
,
238 struct intel_crtc_state
*pipe_config
)
240 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
241 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
242 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
243 struct drm_device
*dev
= encoder
->base
.dev
;
244 struct drm_i915_private
*dev_priv
= to_i915(dev
);
245 enum transcoder cpu_transcoder
= pipe_config
->cpu_transcoder
;
248 temp
= I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder
));
249 if (temp
& TRANS_DDI_PHSYNC
)
250 flags
|= DRM_MODE_FLAG_PHSYNC
;
252 flags
|= DRM_MODE_FLAG_NHSYNC
;
253 if (temp
& TRANS_DDI_PVSYNC
)
254 flags
|= DRM_MODE_FLAG_PVSYNC
;
256 flags
|= DRM_MODE_FLAG_NVSYNC
;
258 switch (temp
& TRANS_DDI_BPC_MASK
) {
259 case TRANS_DDI_BPC_6
:
260 pipe_config
->pipe_bpp
= 18;
262 case TRANS_DDI_BPC_8
:
263 pipe_config
->pipe_bpp
= 24;
265 case TRANS_DDI_BPC_10
:
266 pipe_config
->pipe_bpp
= 30;
268 case TRANS_DDI_BPC_12
:
269 pipe_config
->pipe_bpp
= 36;
274 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
276 pipe_config
->lane_count
=
277 ((temp
& DDI_PORT_WIDTH_MASK
) >> DDI_PORT_WIDTH_SHIFT
) + 1;
279 intel_dp_get_m_n(crtc
, pipe_config
);
281 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
284 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
286 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
287 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
292 return intel_connector_update_modes(connector
, NULL
);
295 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
296 ret
= intel_connector_update_modes(connector
, edid
);
302 static enum drm_connector_status
303 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
305 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
306 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
309 return connector_status_disconnected
;
310 return drm_dp_mst_detect_port(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
314 intel_dp_mst_set_property(struct drm_connector
*connector
,
315 struct drm_property
*property
,
322 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
324 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
326 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
327 kfree(intel_connector
->edid
);
329 drm_connector_cleanup(connector
);
333 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
334 .dpms
= drm_atomic_helper_connector_dpms
,
335 .detect
= intel_dp_mst_detect
,
336 .fill_modes
= drm_helper_probe_single_connector_modes
,
337 .set_property
= intel_dp_mst_set_property
,
338 .atomic_get_property
= intel_connector_atomic_get_property
,
339 .late_register
= intel_connector_register
,
340 .early_unregister
= intel_connector_unregister
,
341 .destroy
= intel_dp_mst_connector_destroy
,
342 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
343 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
346 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
348 return intel_dp_mst_get_ddc_modes(connector
);
351 static enum drm_mode_status
352 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
353 struct drm_display_mode
*mode
)
355 int max_dotclk
= to_i915(connector
->dev
)->max_dotclk_freq
;
357 /* TODO - validate mode against available PBN for link */
358 if (mode
->clock
< 10000)
359 return MODE_CLOCK_LOW
;
361 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
362 return MODE_H_ILLEGAL
;
364 if (mode
->clock
> max_dotclk
)
365 return MODE_CLOCK_HIGH
;
370 static struct drm_encoder
*intel_mst_atomic_best_encoder(struct drm_connector
*connector
,
371 struct drm_connector_state
*state
)
373 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
374 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
375 struct intel_crtc
*crtc
= to_intel_crtc(state
->crtc
);
379 return &intel_dp
->mst_encoders
[crtc
->pipe
]->base
.base
;
382 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
384 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
385 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
388 return &intel_dp
->mst_encoders
[0]->base
.base
;
391 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
392 .get_modes
= intel_dp_mst_get_modes
,
393 .mode_valid
= intel_dp_mst_mode_valid
,
394 .atomic_best_encoder
= intel_mst_atomic_best_encoder
,
395 .best_encoder
= intel_mst_best_encoder
,
398 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
400 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
402 drm_encoder_cleanup(encoder
);
406 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
407 .destroy
= intel_dp_mst_encoder_destroy
,
410 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
412 if (connector
->encoder
&& connector
->base
.state
->crtc
) {
414 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
421 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
423 #ifdef CONFIG_DRM_FBDEV_EMULATION
424 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
427 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
,
432 static void intel_connector_remove_from_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_remove_one_connector(&dev_priv
->fbdev
->helper
,
443 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
)
445 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
446 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
447 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
448 struct intel_connector
*intel_connector
;
449 struct drm_connector
*connector
;
452 intel_connector
= intel_connector_alloc();
453 if (!intel_connector
)
456 connector
= &intel_connector
->base
;
457 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
458 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
460 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
461 intel_connector
->mst_port
= intel_dp
;
462 intel_connector
->port
= port
;
464 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
465 drm_mode_connector_attach_encoder(&intel_connector
->base
,
466 &intel_dp
->mst_encoders
[i
]->base
.base
);
468 intel_dp_add_properties(intel_dp
, connector
);
470 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
471 drm_object_attach_property(&connector
->base
, dev
->mode_config
.tile_property
, 0);
473 drm_mode_connector_set_path_property(connector
, pathprop
);
477 static void intel_dp_register_mst_connector(struct drm_connector
*connector
)
479 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
480 struct drm_device
*dev
= connector
->dev
;
482 drm_modeset_lock_all(dev
);
483 intel_connector_add_to_fbdev(intel_connector
);
484 drm_modeset_unlock_all(dev
);
486 drm_connector_register(&intel_connector
->base
);
489 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
490 struct drm_connector
*connector
)
492 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
493 struct drm_device
*dev
= connector
->dev
;
495 drm_connector_unregister(connector
);
497 /* need to nuke the connector */
498 drm_modeset_lock_all(dev
);
499 intel_connector_remove_from_fbdev(intel_connector
);
500 intel_connector
->mst_port
= NULL
;
501 drm_modeset_unlock_all(dev
);
503 drm_connector_unreference(&intel_connector
->base
);
507 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
509 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
510 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
511 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
513 drm_kms_helper_hotplug_event(dev
);
516 static const struct drm_dp_mst_topology_cbs mst_cbs
= {
517 .add_connector
= intel_dp_add_mst_connector
,
518 .register_connector
= intel_dp_register_mst_connector
,
519 .destroy_connector
= intel_dp_destroy_mst_connector
,
520 .hotplug
= intel_dp_mst_hotplug
,
523 static struct intel_dp_mst_encoder
*
524 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
526 struct intel_dp_mst_encoder
*intel_mst
;
527 struct intel_encoder
*intel_encoder
;
528 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
530 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
535 intel_mst
->pipe
= pipe
;
536 intel_encoder
= &intel_mst
->base
;
537 intel_mst
->primary
= intel_dig_port
;
539 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
540 DRM_MODE_ENCODER_DPMST
, "DP-MST %c", pipe_name(pipe
));
542 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
543 intel_encoder
->crtc_mask
= 0x7;
544 intel_encoder
->cloneable
= 0;
546 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
547 intel_encoder
->disable
= intel_mst_disable_dp
;
548 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
549 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
550 intel_encoder
->enable
= intel_mst_enable_dp
;
551 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
552 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
559 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
562 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
564 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
565 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
570 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
572 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
573 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
576 intel_dp
->can_mst
= true;
577 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
579 /* create encoders */
580 intel_dp_create_fake_mst_encoders(intel_dig_port
);
581 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
->dev
, &intel_dp
->aux
, 16, 3, conn_base_id
);
583 intel_dp
->can_mst
= false;
590 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
592 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
594 if (!intel_dp
->can_mst
)
597 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
598 /* encoders will get killed by normal cleanup */