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
;
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
);
55 intel_dp
->link_bw
= intel_dp_max_link_bw(intel_dp
);
56 intel_dp
->lane_count
= lane_count
;
58 pipe_config
->pipe_bpp
= 24;
59 pipe_config
->port_clock
= drm_dp_bw_code_to_link_rate(intel_dp
->link_bw
);
61 list_for_each_entry(intel_connector
, &dev
->mode_config
.connector_list
, base
.head
) {
62 if (intel_connector
->new_encoder
== encoder
) {
63 found
= intel_connector
;
69 DRM_ERROR("can't find connector\n");
73 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->clock
, bpp
);
75 pipe_config
->pbn
= mst_pbn
;
76 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
78 intel_link_compute_m_n(bpp
, lane_count
,
79 adjusted_mode
->crtc_clock
,
80 pipe_config
->port_clock
,
81 &pipe_config
->dp_m_n
);
83 pipe_config
->dp_m_n
.tu
= slots
;
88 static void intel_mst_disable_dp(struct intel_encoder
*encoder
)
90 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
91 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
92 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
95 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
97 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, intel_mst
->port
);
99 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
101 DRM_ERROR("failed to update payload %d\n", ret
);
105 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
)
107 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
108 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
109 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
111 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
114 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
115 /* and this can also fail */
116 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
118 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, intel_mst
->port
);
120 intel_dp
->active_mst_links
--;
121 intel_mst
->port
= NULL
;
122 if (intel_dp
->active_mst_links
== 0) {
123 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
);
124 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
128 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
)
130 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
131 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
132 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
133 struct drm_device
*dev
= encoder
->base
.dev
;
134 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
135 enum port port
= intel_dig_port
->port
;
138 struct intel_connector
*found
= NULL
, *intel_connector
;
140 struct drm_crtc
*crtc
= encoder
->base
.crtc
;
141 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
143 list_for_each_entry(intel_connector
, &dev
->mode_config
.connector_list
, base
.head
) {
144 if (intel_connector
->new_encoder
== encoder
) {
145 found
= intel_connector
;
151 DRM_ERROR("can't find connector\n");
155 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
156 intel_mst
->port
= found
->port
;
158 if (intel_dp
->active_mst_links
== 0) {
159 enum port port
= intel_ddi_get_encoder_port(encoder
);
161 I915_WRITE(PORT_CLK_SEL(port
),
162 intel_crtc
->config
->ddi_pll_sel
);
164 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
166 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
169 intel_dp_start_link_train(intel_dp
);
170 intel_dp_complete_link_train(intel_dp
);
171 intel_dp_stop_link_train(intel_dp
);
174 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
176 intel_crtc
->config
->pbn
, &slots
);
178 DRM_ERROR("failed to allocate vcpi\n");
183 intel_dp
->active_mst_links
++;
184 temp
= I915_READ(DP_TP_STATUS(port
));
185 I915_WRITE(DP_TP_STATUS(port
), temp
);
187 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
190 static void intel_mst_enable_dp(struct intel_encoder
*encoder
)
192 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
193 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
194 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
195 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
196 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
197 enum port port
= intel_dig_port
->port
;
200 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
202 if (wait_for((I915_READ(DP_TP_STATUS(port
)) & DP_TP_STATUS_ACT_SENT
),
204 DRM_ERROR("Timed out waiting for ACT sent\n");
206 ret
= drm_dp_check_act_status(&intel_dp
->mst_mgr
);
208 ret
= drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
211 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
*encoder
,
214 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
215 *pipe
= intel_mst
->pipe
;
221 static void intel_dp_mst_enc_get_config(struct intel_encoder
*encoder
,
222 struct intel_crtc_state
*pipe_config
)
224 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
225 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
226 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
227 struct drm_device
*dev
= encoder
->base
.dev
;
228 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
229 enum transcoder cpu_transcoder
= pipe_config
->cpu_transcoder
;
232 pipe_config
->has_dp_encoder
= true;
234 temp
= I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder
));
235 if (temp
& TRANS_DDI_PHSYNC
)
236 flags
|= DRM_MODE_FLAG_PHSYNC
;
238 flags
|= DRM_MODE_FLAG_NHSYNC
;
239 if (temp
& TRANS_DDI_PVSYNC
)
240 flags
|= DRM_MODE_FLAG_PVSYNC
;
242 flags
|= DRM_MODE_FLAG_NVSYNC
;
244 switch (temp
& TRANS_DDI_BPC_MASK
) {
245 case TRANS_DDI_BPC_6
:
246 pipe_config
->pipe_bpp
= 18;
248 case TRANS_DDI_BPC_8
:
249 pipe_config
->pipe_bpp
= 24;
251 case TRANS_DDI_BPC_10
:
252 pipe_config
->pipe_bpp
= 30;
254 case TRANS_DDI_BPC_12
:
255 pipe_config
->pipe_bpp
= 36;
260 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
261 intel_dp_get_m_n(crtc
, pipe_config
);
263 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
266 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
268 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
269 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
273 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
277 ret
= intel_connector_update_modes(connector
, edid
);
283 static enum drm_connector_status
284 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
286 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
287 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
289 return drm_dp_mst_detect_port(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
293 intel_dp_mst_set_property(struct drm_connector
*connector
,
294 struct drm_property
*property
,
301 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
303 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
305 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
306 kfree(intel_connector
->edid
);
308 drm_connector_cleanup(connector
);
312 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
313 .dpms
= intel_connector_dpms
,
314 .detect
= intel_dp_mst_detect
,
315 .fill_modes
= drm_helper_probe_single_connector_modes
,
316 .set_property
= intel_dp_mst_set_property
,
317 .atomic_get_property
= intel_connector_atomic_get_property
,
318 .destroy
= intel_dp_mst_connector_destroy
,
319 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
322 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
324 return intel_dp_mst_get_ddc_modes(connector
);
327 static enum drm_mode_status
328 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
329 struct drm_display_mode
*mode
)
331 /* TODO - validate mode against available PBN for link */
332 if (mode
->clock
< 10000)
333 return MODE_CLOCK_LOW
;
335 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
336 return MODE_H_ILLEGAL
;
341 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
343 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
344 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
345 return &intel_dp
->mst_encoders
[0]->base
.base
;
348 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
349 .get_modes
= intel_dp_mst_get_modes
,
350 .mode_valid
= intel_dp_mst_mode_valid
,
351 .best_encoder
= intel_mst_best_encoder
,
354 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
356 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
358 drm_encoder_cleanup(encoder
);
362 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
363 .destroy
= intel_dp_mst_encoder_destroy
,
366 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
368 if (connector
->encoder
) {
370 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
377 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
379 #ifdef CONFIG_DRM_I915_FBDEV
380 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
381 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
, &connector
->base
);
385 static void intel_connector_remove_from_fbdev(struct intel_connector
*connector
)
387 #ifdef CONFIG_DRM_I915_FBDEV
388 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
389 drm_fb_helper_remove_one_connector(&dev_priv
->fbdev
->helper
, &connector
->base
);
393 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
)
395 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
396 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
397 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
398 struct intel_connector
*intel_connector
;
399 struct drm_connector
*connector
;
402 intel_connector
= kzalloc(sizeof(*intel_connector
), GFP_KERNEL
);
403 if (!intel_connector
)
406 connector
= &intel_connector
->base
;
407 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
408 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
410 intel_connector
->unregister
= intel_connector_unregister
;
411 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
412 intel_connector
->mst_port
= intel_dp
;
413 intel_connector
->port
= port
;
415 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
416 drm_mode_connector_attach_encoder(&intel_connector
->base
,
417 &intel_dp
->mst_encoders
[i
]->base
.base
);
419 intel_dp_add_properties(intel_dp
, connector
);
421 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
422 drm_object_attach_property(&connector
->base
, dev
->mode_config
.tile_property
, 0);
424 drm_mode_connector_set_path_property(connector
, pathprop
);
425 drm_reinit_primary_mode_group(dev
);
426 mutex_lock(&dev
->mode_config
.mutex
);
427 intel_connector_add_to_fbdev(intel_connector
);
428 mutex_unlock(&dev
->mode_config
.mutex
);
429 drm_connector_register(&intel_connector
->base
);
433 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
434 struct drm_connector
*connector
)
436 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
437 struct drm_device
*dev
= connector
->dev
;
438 /* need to nuke the connector */
439 mutex_lock(&dev
->mode_config
.mutex
);
440 intel_connector_dpms(connector
, DRM_MODE_DPMS_OFF
);
441 mutex_unlock(&dev
->mode_config
.mutex
);
443 intel_connector
->unregister(intel_connector
);
445 mutex_lock(&dev
->mode_config
.mutex
);
446 intel_connector_remove_from_fbdev(intel_connector
);
447 drm_connector_cleanup(connector
);
448 mutex_unlock(&dev
->mode_config
.mutex
);
450 drm_reinit_primary_mode_group(dev
);
452 kfree(intel_connector
);
456 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
458 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
459 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
460 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
462 drm_kms_helper_hotplug_event(dev
);
465 static struct drm_dp_mst_topology_cbs mst_cbs
= {
466 .add_connector
= intel_dp_add_mst_connector
,
467 .destroy_connector
= intel_dp_destroy_mst_connector
,
468 .hotplug
= intel_dp_mst_hotplug
,
471 static struct intel_dp_mst_encoder
*
472 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
474 struct intel_dp_mst_encoder
*intel_mst
;
475 struct intel_encoder
*intel_encoder
;
476 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
478 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
483 intel_mst
->pipe
= pipe
;
484 intel_encoder
= &intel_mst
->base
;
485 intel_mst
->primary
= intel_dig_port
;
487 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
488 DRM_MODE_ENCODER_DPMST
);
490 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
491 intel_encoder
->crtc_mask
= 0x7;
492 intel_encoder
->cloneable
= 0;
494 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
495 intel_encoder
->disable
= intel_mst_disable_dp
;
496 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
497 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
498 intel_encoder
->enable
= intel_mst_enable_dp
;
499 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
500 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
507 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
510 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
512 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
513 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
518 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
520 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
521 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
524 intel_dp
->can_mst
= true;
525 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
527 /* create encoders */
528 intel_dp_create_fake_mst_encoders(intel_dig_port
);
529 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
->dev
, &intel_dp
->aux
, 16, 3, conn_base_id
);
531 intel_dp
->can_mst
= false;
538 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
540 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
542 if (!intel_dp
->can_mst
)
545 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
546 /* encoders will get killed by normal cleanup */