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26#include <drm/drmP.h>
27#include "i915_drv.h"
28#include "intel_drv.h"
29#include <drm/drm_crtc_helper.h>
30#include <drm/drm_edid.h>
31
32static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
33 struct intel_crtc_config *pipe_config)
34{
35 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
36 struct intel_digital_port *intel_dig_port = intel_mst->primary;
37 struct intel_dp *intel_dp = &intel_dig_port->dp;
38 struct drm_device *dev = encoder->base.dev;
39 int bpp;
40 int lane_count, slots;
41 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
42 struct intel_connector *found = NULL, *intel_connector;
43 int mst_pbn;
44
45 pipe_config->dp_encoder_is_mst = true;
46 pipe_config->has_pch_encoder = false;
47 pipe_config->has_dp_encoder = true;
48 bpp = 24;
49
50
51
52
53 lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
54 intel_dp->link_bw = intel_dp_max_link_bw(intel_dp);
55 intel_dp->lane_count = lane_count;
56
57 pipe_config->pipe_bpp = 24;
58 pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
59
60 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
61 if (intel_connector->new_encoder == encoder) {
62 found = intel_connector;
63 break;
64 }
65 }
66
67 if (!found) {
68 DRM_ERROR("can't find connector\n");
69 return false;
70 }
71
72 mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
73
74 pipe_config->pbn = mst_pbn;
75 slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
76
77 intel_link_compute_m_n(bpp, lane_count,
78 adjusted_mode->crtc_clock,
79 pipe_config->port_clock,
80 &pipe_config->dp_m_n);
81
82 pipe_config->dp_m_n.tu = slots;
83 return true;
84
85}
86
87static void intel_mst_disable_dp(struct intel_encoder *encoder)
88{
89 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
90 struct intel_digital_port *intel_dig_port = intel_mst->primary;
91 struct intel_dp *intel_dp = &intel_dig_port->dp;
92 int ret;
93
94 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
95
96 drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
97
98 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
99 if (ret) {
100 DRM_ERROR("failed to update payload %d\n", ret);
101 }
102}
103
104static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
105{
106 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
107 struct intel_digital_port *intel_dig_port = intel_mst->primary;
108 struct intel_dp *intel_dp = &intel_dig_port->dp;
109
110 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
111
112
113 drm_dp_check_act_status(&intel_dp->mst_mgr);
114
115 drm_dp_update_payload_part2(&intel_dp->mst_mgr);
116
117 drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
118
119 intel_dp->active_mst_links--;
120 intel_mst->port = NULL;
121 if (intel_dp->active_mst_links == 0) {
122 intel_dig_port->base.post_disable(&intel_dig_port->base);
123 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
124 }
125}
126
127static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
128{
129 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
130 struct intel_digital_port *intel_dig_port = intel_mst->primary;
131 struct intel_dp *intel_dp = &intel_dig_port->dp;
132 struct drm_device *dev = encoder->base.dev;
133 struct drm_i915_private *dev_priv = dev->dev_private;
134 enum port port = intel_dig_port->port;
135 int ret;
136 uint32_t temp;
137 struct intel_connector *found = NULL, *intel_connector;
138 int slots;
139 struct drm_crtc *crtc = encoder->base.crtc;
140 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
141
142 list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
143 if (intel_connector->new_encoder == encoder) {
144 found = intel_connector;
145 break;
146 }
147 }
148
149 if (!found) {
150 DRM_ERROR("can't find connector\n");
151 return;
152 }
153
154 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
155 intel_mst->port = found->port;
156
157 if (intel_dp->active_mst_links == 0) {
158 enum port port = intel_ddi_get_encoder_port(encoder);
159
160 I915_WRITE(PORT_CLK_SEL(port), intel_crtc->config.ddi_pll_sel);
161
162 intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
163
164 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
165
166
167 intel_dp_start_link_train(intel_dp);
168 intel_dp_complete_link_train(intel_dp);
169 intel_dp_stop_link_train(intel_dp);
170 }
171
172 ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
173 intel_mst->port, intel_crtc->config.pbn, &slots);
174 if (ret == false) {
175 DRM_ERROR("failed to allocate vcpi\n");
176 return;
177 }
178
179
180 intel_dp->active_mst_links++;
181 temp = I915_READ(DP_TP_STATUS(port));
182 I915_WRITE(DP_TP_STATUS(port), temp);
183
184 ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
185}
186
187static void intel_mst_enable_dp(struct intel_encoder *encoder)
188{
189 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
190 struct intel_digital_port *intel_dig_port = intel_mst->primary;
191 struct intel_dp *intel_dp = &intel_dig_port->dp;
192 struct drm_device *dev = intel_dig_port->base.base.dev;
193 struct drm_i915_private *dev_priv = dev->dev_private;
194 enum port port = intel_dig_port->port;
195 int ret;
196
197 DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
198
199 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
200 1))
201 DRM_ERROR("Timed out waiting for ACT sent\n");
202
203 ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
204
205 ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
206}
207
208static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
209 enum pipe *pipe)
210{
211 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
212 *pipe = intel_mst->pipe;
213 if (intel_mst->port)
214 return true;
215 return false;
216}
217
218static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
219 struct intel_crtc_config *pipe_config)
220{
221 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
222 struct intel_digital_port *intel_dig_port = intel_mst->primary;
223 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
224 struct drm_device *dev = encoder->base.dev;
225 struct drm_i915_private *dev_priv = dev->dev_private;
226 enum transcoder cpu_transcoder = crtc->config.cpu_transcoder;
227 u32 temp, flags = 0;
228
229 pipe_config->has_dp_encoder = true;
230
231 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
232 if (temp & TRANS_DDI_PHSYNC)
233 flags |= DRM_MODE_FLAG_PHSYNC;
234 else
235 flags |= DRM_MODE_FLAG_NHSYNC;
236 if (temp & TRANS_DDI_PVSYNC)
237 flags |= DRM_MODE_FLAG_PVSYNC;
238 else
239 flags |= DRM_MODE_FLAG_NVSYNC;
240
241 switch (temp & TRANS_DDI_BPC_MASK) {
242 case TRANS_DDI_BPC_6:
243 pipe_config->pipe_bpp = 18;
244 break;
245 case TRANS_DDI_BPC_8:
246 pipe_config->pipe_bpp = 24;
247 break;
248 case TRANS_DDI_BPC_10:
249 pipe_config->pipe_bpp = 30;
250 break;
251 case TRANS_DDI_BPC_12:
252 pipe_config->pipe_bpp = 36;
253 break;
254 default:
255 break;
256 }
257 pipe_config->adjusted_mode.flags |= flags;
258 intel_dp_get_m_n(crtc, pipe_config);
259
260 intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
261}
262
263static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
264{
265 struct intel_connector *intel_connector = to_intel_connector(connector);
266 struct intel_dp *intel_dp = intel_connector->mst_port;
267 struct edid *edid;
268 int ret;
269
270 edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
271 if (!edid)
272 return 0;
273
274 ret = intel_connector_update_modes(connector, edid);
275 kfree(edid);
276
277 return ret;
278}
279
280static enum drm_connector_status
281intel_mst_port_dp_detect(struct drm_connector *connector)
282{
283 struct intel_connector *intel_connector = to_intel_connector(connector);
284 struct intel_dp *intel_dp = intel_connector->mst_port;
285
286 return drm_dp_mst_detect_port(&intel_dp->mst_mgr, intel_connector->port);
287}
288
289static enum drm_connector_status
290intel_dp_mst_detect(struct drm_connector *connector, bool force)
291{
292 enum drm_connector_status status;
293 status = intel_mst_port_dp_detect(connector);
294 return status;
295}
296
297static int
298intel_dp_mst_set_property(struct drm_connector *connector,
299 struct drm_property *property,
300 uint64_t val)
301{
302 return 0;
303}
304
305static void
306intel_dp_mst_connector_destroy(struct drm_connector *connector)
307{
308 struct intel_connector *intel_connector = to_intel_connector(connector);
309
310 if (!IS_ERR_OR_NULL(intel_connector->edid))
311 kfree(intel_connector->edid);
312
313 drm_connector_cleanup(connector);
314 kfree(connector);
315}
316
317static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
318 .dpms = intel_connector_dpms,
319 .detect = intel_dp_mst_detect,
320 .fill_modes = drm_helper_probe_single_connector_modes,
321 .set_property = intel_dp_mst_set_property,
322 .destroy = intel_dp_mst_connector_destroy,
323};
324
325static int intel_dp_mst_get_modes(struct drm_connector *connector)
326{
327 return intel_dp_mst_get_ddc_modes(connector);
328}
329
330static enum drm_mode_status
331intel_dp_mst_mode_valid(struct drm_connector *connector,
332 struct drm_display_mode *mode)
333{
334
335 if (mode->clock < 10000)
336 return MODE_CLOCK_LOW;
337
338 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
339 return MODE_H_ILLEGAL;
340
341 return MODE_OK;
342}
343
344static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
345{
346 struct intel_connector *intel_connector = to_intel_connector(connector);
347 struct intel_dp *intel_dp = intel_connector->mst_port;
348 return &intel_dp->mst_encoders[0]->base.base;
349}
350
351static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
352 .get_modes = intel_dp_mst_get_modes,
353 .mode_valid = intel_dp_mst_mode_valid,
354 .best_encoder = intel_mst_best_encoder,
355};
356
357static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
358{
359 struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
360
361 drm_encoder_cleanup(encoder);
362 kfree(intel_mst);
363}
364
365static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
366 .destroy = intel_dp_mst_encoder_destroy,
367};
368
369static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
370{
371 if (connector->encoder) {
372 enum pipe pipe;
373 if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
374 return false;
375 return true;
376 }
377 return false;
378}
379
380static void intel_connector_add_to_fbdev(struct intel_connector *connector)
381{
382#ifdef CONFIG_DRM_I915_FBDEV
383 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
384 drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
385#endif
386}
387
388static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
389{
390#ifdef CONFIG_DRM_I915_FBDEV
391 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
392 drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
393#endif
394}
395
396static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, char *pathprop)
397{
398 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
399 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
400 struct drm_device *dev = intel_dig_port->base.base.dev;
401 struct intel_connector *intel_connector;
402 struct drm_connector *connector;
403 int i;
404
405 intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
406 if (!intel_connector)
407 return NULL;
408
409 connector = &intel_connector->base;
410 drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
411 drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
412
413 intel_connector->unregister = intel_connector_unregister;
414 intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
415 intel_connector->mst_port = intel_dp;
416 intel_connector->port = port;
417
418 for (i = PIPE_A; i <= PIPE_C; i++) {
419 drm_mode_connector_attach_encoder(&intel_connector->base,
420 &intel_dp->mst_encoders[i]->base.base);
421 }
422 intel_dp_add_properties(intel_dp, connector);
423
424 drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
425 drm_mode_connector_set_path_property(connector, pathprop);
426 drm_reinit_primary_mode_group(dev);
427 mutex_lock(&dev->mode_config.mutex);
428 intel_connector_add_to_fbdev(intel_connector);
429 mutex_unlock(&dev->mode_config.mutex);
430 drm_connector_register(&intel_connector->base);
431 return connector;
432}
433
434static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
435 struct drm_connector *connector)
436{
437 struct intel_connector *intel_connector = to_intel_connector(connector);
438 struct drm_device *dev = connector->dev;
439
440 mutex_lock(&dev->mode_config.mutex);
441 intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
442 mutex_unlock(&dev->mode_config.mutex);
443
444 intel_connector->unregister(intel_connector);
445
446 mutex_lock(&dev->mode_config.mutex);
447 intel_connector_remove_from_fbdev(intel_connector);
448 drm_connector_cleanup(connector);
449 mutex_unlock(&dev->mode_config.mutex);
450
451 drm_reinit_primary_mode_group(dev);
452
453 kfree(intel_connector);
454 DRM_DEBUG_KMS("\n");
455}
456
457static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
458{
459 struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
460 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
461 struct drm_device *dev = intel_dig_port->base.base.dev;
462
463 drm_kms_helper_hotplug_event(dev);
464}
465
466static struct drm_dp_mst_topology_cbs mst_cbs = {
467 .add_connector = intel_dp_add_mst_connector,
468 .destroy_connector = intel_dp_destroy_mst_connector,
469 .hotplug = intel_dp_mst_hotplug,
470};
471
472static struct intel_dp_mst_encoder *
473intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
474{
475 struct intel_dp_mst_encoder *intel_mst;
476 struct intel_encoder *intel_encoder;
477 struct drm_device *dev = intel_dig_port->base.base.dev;
478
479 intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
480
481 if (!intel_mst)
482 return NULL;
483
484 intel_mst->pipe = pipe;
485 intel_encoder = &intel_mst->base;
486 intel_mst->primary = intel_dig_port;
487
488 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
489 DRM_MODE_ENCODER_DPMST);
490
491 intel_encoder->type = INTEL_OUTPUT_DP_MST;
492 intel_encoder->crtc_mask = 0x7;
493 intel_encoder->cloneable = 0;
494
495 intel_encoder->compute_config = intel_dp_mst_compute_config;
496 intel_encoder->disable = intel_mst_disable_dp;
497 intel_encoder->post_disable = intel_mst_post_disable_dp;
498 intel_encoder->pre_enable = intel_mst_pre_enable_dp;
499 intel_encoder->enable = intel_mst_enable_dp;
500 intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
501 intel_encoder->get_config = intel_dp_mst_enc_get_config;
502
503 return intel_mst;
504
505}
506
507static bool
508intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
509{
510 int i;
511 struct intel_dp *intel_dp = &intel_dig_port->dp;
512
513 for (i = PIPE_A; i <= PIPE_C; i++)
514 intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
515 return true;
516}
517
518int
519intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
520{
521 struct intel_dp *intel_dp = &intel_dig_port->dp;
522 struct drm_device *dev = intel_dig_port->base.base.dev;
523 int ret;
524
525 intel_dp->can_mst = true;
526 intel_dp->mst_mgr.cbs = &mst_cbs;
527
528
529 intel_dp_create_fake_mst_encoders(intel_dig_port);
530 ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
531 if (ret) {
532 intel_dp->can_mst = false;
533 return ret;
534 }
535 return 0;
536}
537
538void
539intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
540{
541 struct intel_dp *intel_dp = &intel_dig_port->dp;
542
543 if (!intel_dp->can_mst)
544 return;
545
546 drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
547
548}
549
