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
,
35 struct drm_connector_state
*conn_state
)
37 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
38 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
39 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
40 struct drm_atomic_state
*state
;
42 int lane_count
, slots
;
43 const struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
46 pipe_config
->dp_encoder_is_mst
= true;
47 pipe_config
->has_pch_encoder
= false;
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
);
55 pipe_config
->lane_count
= lane_count
;
57 pipe_config
->pipe_bpp
= 24;
58 pipe_config
->port_clock
= intel_dp_max_link_rate(intel_dp
);
60 state
= pipe_config
->base
.state
;
62 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->crtc_clock
, bpp
);
64 pipe_config
->pbn
= mst_pbn
;
65 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
67 intel_link_compute_m_n(bpp
, lane_count
,
68 adjusted_mode
->crtc_clock
,
69 pipe_config
->port_clock
,
70 &pipe_config
->dp_m_n
);
72 pipe_config
->dp_m_n
.tu
= slots
;
78 static void intel_mst_disable_dp(struct intel_encoder
*encoder
,
79 struct intel_crtc_state
*old_crtc_state
,
80 struct drm_connector_state
*old_conn_state
)
82 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
83 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
84 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
85 struct intel_connector
*connector
=
86 to_intel_connector(old_conn_state
->connector
);
89 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
91 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, connector
->port
);
93 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
95 DRM_ERROR("failed to update payload %d\n", ret
);
99 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
,
100 struct intel_crtc_state
*old_crtc_state
,
101 struct drm_connector_state
*old_conn_state
)
103 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
104 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
105 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
106 struct intel_connector
*connector
=
107 to_intel_connector(old_conn_state
->connector
);
109 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
112 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
113 /* and this can also fail */
114 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
116 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, connector
->port
);
118 intel_dp
->active_mst_links
--;
120 intel_mst
->connector
= NULL
;
121 if (intel_dp
->active_mst_links
== 0) {
122 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
,
125 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
129 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
,
130 struct intel_crtc_state
*pipe_config
,
131 struct drm_connector_state
*conn_state
)
133 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
134 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
135 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
136 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
137 enum port port
= intel_dig_port
->port
;
138 struct intel_connector
*connector
=
139 to_intel_connector(conn_state
->connector
);
144 /* MST encoders are bound to a crtc, not to a connector,
145 * force the mapping here for get_hw_state.
147 connector
->encoder
= encoder
;
148 intel_mst
->connector
= connector
;
150 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
152 if (intel_dp
->active_mst_links
== 0) {
153 intel_ddi_clk_select(&intel_dig_port
->base
,
154 pipe_config
->shared_dpll
);
156 intel_prepare_dp_ddi_buffers(&intel_dig_port
->base
);
157 intel_dp_set_link_params(intel_dp
,
158 pipe_config
->port_clock
,
159 pipe_config
->lane_count
,
162 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
164 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
166 intel_dp_start_link_train(intel_dp
);
167 intel_dp_stop_link_train(intel_dp
);
170 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
172 pipe_config
->pbn
, &slots
);
174 DRM_ERROR("failed to allocate vcpi\n");
179 intel_dp
->active_mst_links
++;
180 temp
= I915_READ(DP_TP_STATUS(port
));
181 I915_WRITE(DP_TP_STATUS(port
), temp
);
183 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
186 static void intel_mst_enable_dp(struct intel_encoder
*encoder
,
187 struct intel_crtc_state
*pipe_config
,
188 struct drm_connector_state
*conn_state
)
190 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
191 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
192 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
193 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
194 enum port port
= intel_dig_port
->port
;
197 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
199 if (intel_wait_for_register(dev_priv
,
201 DP_TP_STATUS_ACT_SENT
,
202 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
;
216 if (intel_mst
->connector
)
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(pipe_config
->base
.crtc
);
227 struct drm_i915_private
*dev_priv
= to_i915(encoder
->base
.dev
);
228 enum transcoder cpu_transcoder
= pipe_config
->cpu_transcoder
;
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
->base
.adjusted_mode
.flags
|= flags
;
259 pipe_config
->lane_count
=
260 ((temp
& DDI_PORT_WIDTH_MASK
) >> DDI_PORT_WIDTH_SHIFT
) + 1;
262 intel_dp_get_m_n(crtc
, pipe_config
);
264 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
267 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
269 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
270 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
275 return intel_connector_update_modes(connector
, NULL
);
278 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
279 ret
= intel_connector_update_modes(connector
, edid
);
285 static enum drm_connector_status
286 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
288 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
289 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
292 return connector_status_disconnected
;
293 return drm_dp_mst_detect_port(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
297 intel_dp_mst_set_property(struct drm_connector
*connector
,
298 struct drm_property
*property
,
305 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
307 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
309 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
310 kfree(intel_connector
->edid
);
312 drm_connector_cleanup(connector
);
316 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
317 .dpms
= drm_atomic_helper_connector_dpms
,
318 .detect
= intel_dp_mst_detect
,
319 .fill_modes
= drm_helper_probe_single_connector_modes
,
320 .set_property
= intel_dp_mst_set_property
,
321 .atomic_get_property
= intel_connector_atomic_get_property
,
322 .late_register
= intel_connector_register
,
323 .early_unregister
= intel_connector_unregister
,
324 .destroy
= intel_dp_mst_connector_destroy
,
325 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
326 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
329 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
331 return intel_dp_mst_get_ddc_modes(connector
);
334 static enum drm_mode_status
335 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
336 struct drm_display_mode
*mode
)
338 int max_dotclk
= to_i915(connector
->dev
)->max_dotclk_freq
;
340 /* TODO - validate mode against available PBN for link */
341 if (mode
->clock
< 10000)
342 return MODE_CLOCK_LOW
;
344 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
345 return MODE_H_ILLEGAL
;
347 if (mode
->clock
> max_dotclk
)
348 return MODE_CLOCK_HIGH
;
353 static struct drm_encoder
*intel_mst_atomic_best_encoder(struct drm_connector
*connector
,
354 struct drm_connector_state
*state
)
356 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
357 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
358 struct intel_crtc
*crtc
= to_intel_crtc(state
->crtc
);
362 return &intel_dp
->mst_encoders
[crtc
->pipe
]->base
.base
;
365 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
367 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
368 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
371 return &intel_dp
->mst_encoders
[0]->base
.base
;
374 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
375 .get_modes
= intel_dp_mst_get_modes
,
376 .mode_valid
= intel_dp_mst_mode_valid
,
377 .atomic_best_encoder
= intel_mst_atomic_best_encoder
,
378 .best_encoder
= intel_mst_best_encoder
,
381 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
383 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
385 drm_encoder_cleanup(encoder
);
389 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
390 .destroy
= intel_dp_mst_encoder_destroy
,
393 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
395 if (connector
->encoder
&& connector
->base
.state
->crtc
) {
397 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
404 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
406 #ifdef CONFIG_DRM_FBDEV_EMULATION
407 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
410 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
,
415 static void intel_connector_remove_from_fbdev(struct intel_connector
*connector
)
417 #ifdef CONFIG_DRM_FBDEV_EMULATION
418 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
421 drm_fb_helper_remove_one_connector(&dev_priv
->fbdev
->helper
,
426 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
)
428 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
429 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
430 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
431 struct intel_connector
*intel_connector
;
432 struct drm_connector
*connector
;
435 intel_connector
= intel_connector_alloc();
436 if (!intel_connector
)
439 connector
= &intel_connector
->base
;
440 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
441 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
443 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
444 intel_connector
->mst_port
= intel_dp
;
445 intel_connector
->port
= port
;
447 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
448 drm_mode_connector_attach_encoder(&intel_connector
->base
,
449 &intel_dp
->mst_encoders
[i
]->base
.base
);
451 intel_dp_add_properties(intel_dp
, connector
);
453 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
454 drm_object_attach_property(&connector
->base
, dev
->mode_config
.tile_property
, 0);
456 drm_mode_connector_set_path_property(connector
, pathprop
);
460 static void intel_dp_register_mst_connector(struct drm_connector
*connector
)
462 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
463 struct drm_device
*dev
= connector
->dev
;
465 drm_modeset_lock_all(dev
);
466 intel_connector_add_to_fbdev(intel_connector
);
467 drm_modeset_unlock_all(dev
);
469 drm_connector_register(&intel_connector
->base
);
472 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
473 struct drm_connector
*connector
)
475 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
476 struct drm_device
*dev
= connector
->dev
;
478 drm_connector_unregister(connector
);
480 /* need to nuke the connector */
481 drm_modeset_lock_all(dev
);
482 intel_connector_remove_from_fbdev(intel_connector
);
483 intel_connector
->mst_port
= NULL
;
484 drm_modeset_unlock_all(dev
);
486 drm_connector_unreference(&intel_connector
->base
);
490 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
492 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
493 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
494 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
496 drm_kms_helper_hotplug_event(dev
);
499 static const struct drm_dp_mst_topology_cbs mst_cbs
= {
500 .add_connector
= intel_dp_add_mst_connector
,
501 .register_connector
= intel_dp_register_mst_connector
,
502 .destroy_connector
= intel_dp_destroy_mst_connector
,
503 .hotplug
= intel_dp_mst_hotplug
,
506 static struct intel_dp_mst_encoder
*
507 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
509 struct intel_dp_mst_encoder
*intel_mst
;
510 struct intel_encoder
*intel_encoder
;
511 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
513 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
518 intel_mst
->pipe
= pipe
;
519 intel_encoder
= &intel_mst
->base
;
520 intel_mst
->primary
= intel_dig_port
;
522 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
523 DRM_MODE_ENCODER_DPMST
, "DP-MST %c", pipe_name(pipe
));
525 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
526 intel_encoder
->crtc_mask
= 0x7;
527 intel_encoder
->cloneable
= 0;
529 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
530 intel_encoder
->disable
= intel_mst_disable_dp
;
531 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
532 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
533 intel_encoder
->enable
= intel_mst_enable_dp
;
534 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
535 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
542 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
545 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
547 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
548 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
553 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
555 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
556 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
559 intel_dp
->can_mst
= true;
560 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
562 /* create encoders */
563 intel_dp_create_fake_mst_encoders(intel_dig_port
);
564 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
->dev
, &intel_dp
->aux
, 16, 3, conn_base_id
);
566 intel_dp
->can_mst
= false;
573 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
575 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
577 if (!intel_dp
->can_mst
)
580 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
581 /* encoders will get killed by normal cleanup */