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_device
*dev
= encoder
->base
.dev
;
41 int lane_count
, slots
, rate
;
42 struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
43 struct intel_connector
*found
= NULL
, *intel_connector
;
46 pipe_config
->dp_encoder_is_mst
= true;
47 pipe_config
->has_pch_encoder
= false;
48 pipe_config
->has_dp_encoder
= true;
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 rate
= intel_dp_max_link_rate(intel_dp
);
58 if (intel_dp
->num_supported_rates
) {
59 intel_dp
->link_bw
= 0;
60 intel_dp
->rate_select
= intel_dp_rate_select(intel_dp
, rate
);
62 intel_dp
->link_bw
= drm_dp_link_rate_to_bw_code(rate
);
63 intel_dp
->rate_select
= 0;
66 intel_dp
->lane_count
= lane_count
;
68 pipe_config
->pipe_bpp
= 24;
69 pipe_config
->port_clock
= rate
;
71 for_each_intel_connector(dev
, intel_connector
) {
72 if (intel_connector
->new_encoder
== encoder
) {
73 found
= intel_connector
;
79 DRM_ERROR("can't find connector\n");
83 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->clock
, bpp
);
85 pipe_config
->pbn
= mst_pbn
;
86 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
88 intel_link_compute_m_n(bpp
, lane_count
,
89 adjusted_mode
->crtc_clock
,
90 pipe_config
->port_clock
,
91 &pipe_config
->dp_m_n
);
93 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
;
105 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
107 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, intel_mst
->port
);
109 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
111 DRM_ERROR("failed to update payload %d\n", ret
);
115 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
)
117 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
118 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
119 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
121 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
124 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
125 /* and this can also fail */
126 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
128 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, intel_mst
->port
);
130 intel_dp
->active_mst_links
--;
131 intel_mst
->port
= NULL
;
132 if (intel_dp
->active_mst_links
== 0) {
133 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
);
134 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
138 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
)
140 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
141 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
142 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
143 struct drm_device
*dev
= encoder
->base
.dev
;
144 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
145 enum port port
= intel_dig_port
->port
;
148 struct intel_connector
*found
= NULL
, *intel_connector
;
150 struct drm_crtc
*crtc
= encoder
->base
.crtc
;
151 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
153 for_each_intel_connector(dev
, intel_connector
) {
154 if (intel_connector
->new_encoder
== encoder
) {
155 found
= intel_connector
;
161 DRM_ERROR("can't find connector\n");
165 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
166 intel_mst
->port
= found
->port
;
168 if (intel_dp
->active_mst_links
== 0) {
169 enum port port
= intel_ddi_get_encoder_port(encoder
);
171 I915_WRITE(PORT_CLK_SEL(port
),
172 intel_crtc
->config
->ddi_pll_sel
);
174 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
176 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
179 intel_dp_start_link_train(intel_dp
);
180 intel_dp_complete_link_train(intel_dp
);
181 intel_dp_stop_link_train(intel_dp
);
184 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
186 intel_crtc
->config
->pbn
, &slots
);
188 DRM_ERROR("failed to allocate vcpi\n");
193 intel_dp
->active_mst_links
++;
194 temp
= I915_READ(DP_TP_STATUS(port
));
195 I915_WRITE(DP_TP_STATUS(port
), temp
);
197 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
200 static void intel_mst_enable_dp(struct intel_encoder
*encoder
)
202 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
203 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
204 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
205 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
206 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
207 enum port port
= intel_dig_port
->port
;
210 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
212 if (wait_for((I915_READ(DP_TP_STATUS(port
)) & DP_TP_STATUS_ACT_SENT
),
214 DRM_ERROR("Timed out waiting for ACT sent\n");
216 ret
= drm_dp_check_act_status(&intel_dp
->mst_mgr
);
218 ret
= drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
221 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
*encoder
,
224 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
225 *pipe
= intel_mst
->pipe
;
231 static void intel_dp_mst_enc_get_config(struct intel_encoder
*encoder
,
232 struct intel_crtc_state
*pipe_config
)
234 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
235 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
236 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
237 struct drm_device
*dev
= encoder
->base
.dev
;
238 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
239 enum transcoder cpu_transcoder
= pipe_config
->cpu_transcoder
;
242 pipe_config
->has_dp_encoder
= true;
244 temp
= I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder
));
245 if (temp
& TRANS_DDI_PHSYNC
)
246 flags
|= DRM_MODE_FLAG_PHSYNC
;
248 flags
|= DRM_MODE_FLAG_NHSYNC
;
249 if (temp
& TRANS_DDI_PVSYNC
)
250 flags
|= DRM_MODE_FLAG_PVSYNC
;
252 flags
|= DRM_MODE_FLAG_NVSYNC
;
254 switch (temp
& TRANS_DDI_BPC_MASK
) {
255 case TRANS_DDI_BPC_6
:
256 pipe_config
->pipe_bpp
= 18;
258 case TRANS_DDI_BPC_8
:
259 pipe_config
->pipe_bpp
= 24;
261 case TRANS_DDI_BPC_10
:
262 pipe_config
->pipe_bpp
= 30;
264 case TRANS_DDI_BPC_12
:
265 pipe_config
->pipe_bpp
= 36;
270 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
271 intel_dp_get_m_n(crtc
, pipe_config
);
273 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
276 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
278 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
279 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
283 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
287 ret
= intel_connector_update_modes(connector
, edid
);
293 static enum drm_connector_status
294 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
296 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
297 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
299 return drm_dp_mst_detect_port(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
303 intel_dp_mst_set_property(struct drm_connector
*connector
,
304 struct drm_property
*property
,
311 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
313 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
315 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
316 kfree(intel_connector
->edid
);
318 drm_connector_cleanup(connector
);
322 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
323 .dpms
= intel_connector_dpms
,
324 .detect
= intel_dp_mst_detect
,
325 .fill_modes
= drm_helper_probe_single_connector_modes
,
326 .set_property
= intel_dp_mst_set_property
,
327 .atomic_get_property
= intel_connector_atomic_get_property
,
328 .destroy
= intel_dp_mst_connector_destroy
,
329 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
332 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
334 return intel_dp_mst_get_ddc_modes(connector
);
337 static enum drm_mode_status
338 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
339 struct drm_display_mode
*mode
)
341 /* TODO - validate mode against available PBN for link */
342 if (mode
->clock
< 10000)
343 return MODE_CLOCK_LOW
;
345 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
346 return MODE_H_ILLEGAL
;
351 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
353 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
354 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
355 return &intel_dp
->mst_encoders
[0]->base
.base
;
358 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
359 .get_modes
= intel_dp_mst_get_modes
,
360 .mode_valid
= intel_dp_mst_mode_valid
,
361 .best_encoder
= intel_mst_best_encoder
,
364 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
366 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
368 drm_encoder_cleanup(encoder
);
372 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
373 .destroy
= intel_dp_mst_encoder_destroy
,
376 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
378 if (connector
->encoder
) {
380 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
387 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
389 #ifdef CONFIG_DRM_I915_FBDEV
390 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
391 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
, &connector
->base
);
395 static void intel_connector_remove_from_fbdev(struct intel_connector
*connector
)
397 #ifdef CONFIG_DRM_I915_FBDEV
398 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
399 drm_fb_helper_remove_one_connector(&dev_priv
->fbdev
->helper
, &connector
->base
);
403 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
)
405 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
406 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
407 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
408 struct intel_connector
*intel_connector
;
409 struct drm_connector
*connector
;
412 intel_connector
= kzalloc(sizeof(*intel_connector
), GFP_KERNEL
);
413 if (!intel_connector
)
416 connector
= &intel_connector
->base
;
417 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
418 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
420 intel_connector
->unregister
= intel_connector_unregister
;
421 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
422 intel_connector
->mst_port
= intel_dp
;
423 intel_connector
->port
= port
;
425 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
426 drm_mode_connector_attach_encoder(&intel_connector
->base
,
427 &intel_dp
->mst_encoders
[i
]->base
.base
);
429 intel_dp_add_properties(intel_dp
, connector
);
431 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
432 drm_object_attach_property(&connector
->base
, dev
->mode_config
.tile_property
, 0);
434 drm_mode_connector_set_path_property(connector
, pathprop
);
435 drm_reinit_primary_mode_group(dev
);
436 mutex_lock(&dev
->mode_config
.mutex
);
437 intel_connector_add_to_fbdev(intel_connector
);
438 mutex_unlock(&dev
->mode_config
.mutex
);
439 drm_connector_register(&intel_connector
->base
);
443 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
444 struct drm_connector
*connector
)
446 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
447 struct drm_device
*dev
= connector
->dev
;
448 /* need to nuke the connector */
449 mutex_lock(&dev
->mode_config
.mutex
);
450 intel_connector_dpms(connector
, DRM_MODE_DPMS_OFF
);
451 mutex_unlock(&dev
->mode_config
.mutex
);
453 intel_connector
->unregister(intel_connector
);
455 mutex_lock(&dev
->mode_config
.mutex
);
456 intel_connector_remove_from_fbdev(intel_connector
);
457 drm_connector_cleanup(connector
);
458 mutex_unlock(&dev
->mode_config
.mutex
);
460 drm_reinit_primary_mode_group(dev
);
462 kfree(intel_connector
);
466 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
468 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
469 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
470 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
472 drm_kms_helper_hotplug_event(dev
);
475 static struct drm_dp_mst_topology_cbs mst_cbs
= {
476 .add_connector
= intel_dp_add_mst_connector
,
477 .destroy_connector
= intel_dp_destroy_mst_connector
,
478 .hotplug
= intel_dp_mst_hotplug
,
481 static struct intel_dp_mst_encoder
*
482 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
484 struct intel_dp_mst_encoder
*intel_mst
;
485 struct intel_encoder
*intel_encoder
;
486 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
488 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
493 intel_mst
->pipe
= pipe
;
494 intel_encoder
= &intel_mst
->base
;
495 intel_mst
->primary
= intel_dig_port
;
497 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
498 DRM_MODE_ENCODER_DPMST
);
500 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
501 intel_encoder
->crtc_mask
= 0x7;
502 intel_encoder
->cloneable
= 0;
504 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
505 intel_encoder
->disable
= intel_mst_disable_dp
;
506 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
507 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
508 intel_encoder
->enable
= intel_mst_enable_dp
;
509 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
510 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
517 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
520 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
522 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
523 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
528 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
530 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
531 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
534 intel_dp
->can_mst
= true;
535 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
537 /* create encoders */
538 intel_dp_create_fake_mst_encoders(intel_dig_port
);
539 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
->dev
, &intel_dp
->aux
, 16, 3, conn_base_id
);
541 intel_dp
->can_mst
= false;
548 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
550 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
552 if (!intel_dp
->can_mst
)
555 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
556 /* encoders will get killed by normal cleanup */