1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2020 Intel Corporation
4 *
5 * HDMI support for G4x,ILK,SNB,IVB,VLV,CHV (HSW+ handled by the DDI code).
6 */
7
8#include "g4x_hdmi.h"
9#include "i915_reg.h"
10#include "intel_atomic.h"
11#include "intel_audio.h"
12#include "intel_connector.h"
13#include "intel_crtc.h"
14#include "intel_de.h"
15#include "intel_display_power.h"
16#include "intel_display_types.h"
17#include "intel_dp_aux.h"
18#include "intel_dpio_phy.h"
19#include "intel_fdi.h"
20#include "intel_fifo_underrun.h"
21#include "intel_hdmi.h"
22#include "intel_hotplug.h"
23#include "intel_sdvo.h"
24#include "vlv_sideband.h"
25
26static void intel_hdmi_prepare(struct intel_encoder *encoder,
27 const struct intel_crtc_state *crtc_state)
28{
29 struct drm_device *dev = encoder->base.dev;
30 struct drm_i915_private *dev_priv = to_i915(dev);
31 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
32 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
33 const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
34 u32 hdmi_val;
35
36 intel_dp_dual_mode_set_tmds_output(hdmi: intel_hdmi, enable: true);
37
38 hdmi_val = SDVO_ENCODING_HDMI;
39 if (!HAS_PCH_SPLIT(dev_priv) && crtc_state->limited_color_range)
40 hdmi_val |= HDMI_COLOR_RANGE_16_235;
41 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
42 hdmi_val |= SDVO_VSYNC_ACTIVE_HIGH;
43 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
44 hdmi_val |= SDVO_HSYNC_ACTIVE_HIGH;
45
46 if (crtc_state->pipe_bpp > 24)
47 hdmi_val |= HDMI_COLOR_FORMAT_12bpc;
48 else
49 hdmi_val |= SDVO_COLOR_FORMAT_8bpc;
50
51 if (crtc_state->has_hdmi_sink)
52 hdmi_val |= HDMI_MODE_SELECT_HDMI;
53
54 if (HAS_PCH_CPT(dev_priv))
55 hdmi_val |= SDVO_PIPE_SEL_CPT(crtc->pipe);
56 else if (IS_CHERRYVIEW(dev_priv))
57 hdmi_val |= SDVO_PIPE_SEL_CHV(crtc->pipe);
58 else
59 hdmi_val |= SDVO_PIPE_SEL(crtc->pipe);
60
61 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: hdmi_val);
62 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
63}
64
65static bool intel_hdmi_get_hw_state(struct intel_encoder *encoder,
66 enum pipe *pipe)
67{
68 struct drm_i915_private *dev_priv = to_i915(dev: encoder->base.dev);
69 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
70 intel_wakeref_t wakeref;
71 bool ret;
72
73 wakeref = intel_display_power_get_if_enabled(dev_priv,
74 domain: encoder->power_domain);
75 if (!wakeref)
76 return false;
77
78 ret = intel_sdvo_port_enabled(dev_priv, sdvo_reg: intel_hdmi->hdmi_reg, pipe);
79
80 intel_display_power_put(dev_priv, domain: encoder->power_domain, wakeref);
81
82 return ret;
83}
84
85static bool connector_is_hdmi(struct drm_connector *connector)
86{
87 struct intel_encoder *encoder =
88 intel_attached_encoder(to_intel_connector(connector));
89
90 return encoder && encoder->type == INTEL_OUTPUT_HDMI;
91}
92
93static bool g4x_compute_has_hdmi_sink(struct intel_atomic_state *state,
94 struct intel_crtc *this_crtc)
95{
96 const struct drm_connector_state *conn_state;
97 struct drm_connector *connector;
98 int i;
99
100 /*
101 * On g4x only one HDMI port can transmit infoframes/audio at
102 * any given time. Select the first suitable port for this duty.
103 *
104 * See also g4x_hdmi_connector_atomic_check().
105 */
106 for_each_new_connector_in_state(&state->base, connector, conn_state, i) {
107 struct intel_encoder *encoder = to_intel_encoder(conn_state->best_encoder);
108 const struct intel_crtc_state *crtc_state;
109 struct intel_crtc *crtc;
110
111 if (!connector_is_hdmi(connector))
112 continue;
113
114 crtc = to_intel_crtc(conn_state->crtc);
115 if (!crtc)
116 continue;
117
118 crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
119
120 if (!intel_hdmi_compute_has_hdmi_sink(encoder, crtc_state, conn_state))
121 continue;
122
123 return crtc == this_crtc;
124 }
125
126 return false;
127}
128
129static int g4x_hdmi_compute_config(struct intel_encoder *encoder,
130 struct intel_crtc_state *crtc_state,
131 struct drm_connector_state *conn_state)
132{
133 struct intel_atomic_state *state = to_intel_atomic_state(crtc_state->uapi.state);
134 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
135 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
136
137 if (HAS_PCH_SPLIT(i915)) {
138 crtc_state->has_pch_encoder = true;
139 if (!intel_fdi_compute_pipe_bpp(crtc_state))
140 return -EINVAL;
141 }
142
143 if (IS_G4X(i915))
144 crtc_state->has_hdmi_sink = g4x_compute_has_hdmi_sink(state, this_crtc: crtc);
145 else
146 crtc_state->has_hdmi_sink =
147 intel_hdmi_compute_has_hdmi_sink(encoder, crtc_state, conn_state);
148
149 return intel_hdmi_compute_config(encoder, pipe_config: crtc_state, conn_state);
150}
151
152static void intel_hdmi_get_config(struct intel_encoder *encoder,
153 struct intel_crtc_state *pipe_config)
154{
155 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
156 struct drm_device *dev = encoder->base.dev;
157 struct drm_i915_private *dev_priv = to_i915(dev);
158 u32 tmp, flags = 0;
159 int dotclock;
160
161 pipe_config->output_types |= BIT(INTEL_OUTPUT_HDMI);
162
163 tmp = intel_de_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
164
165 if (tmp & SDVO_HSYNC_ACTIVE_HIGH)
166 flags |= DRM_MODE_FLAG_PHSYNC;
167 else
168 flags |= DRM_MODE_FLAG_NHSYNC;
169
170 if (tmp & SDVO_VSYNC_ACTIVE_HIGH)
171 flags |= DRM_MODE_FLAG_PVSYNC;
172 else
173 flags |= DRM_MODE_FLAG_NVSYNC;
174
175 if (tmp & HDMI_MODE_SELECT_HDMI)
176 pipe_config->has_hdmi_sink = true;
177
178 pipe_config->infoframes.enable |=
179 intel_hdmi_infoframes_enabled(encoder, crtc_state: pipe_config);
180
181 if (pipe_config->infoframes.enable)
182 pipe_config->has_infoframe = true;
183
184 if (tmp & HDMI_AUDIO_ENABLE)
185 pipe_config->has_audio = true;
186
187 if (!HAS_PCH_SPLIT(dev_priv) &&
188 tmp & HDMI_COLOR_RANGE_16_235)
189 pipe_config->limited_color_range = true;
190
191 pipe_config->hw.adjusted_mode.flags |= flags;
192
193 if ((tmp & SDVO_COLOR_FORMAT_MASK) == HDMI_COLOR_FORMAT_12bpc)
194 dotclock = DIV_ROUND_CLOSEST(pipe_config->port_clock * 2, 3);
195 else
196 dotclock = pipe_config->port_clock;
197
198 if (pipe_config->pixel_multiplier)
199 dotclock /= pipe_config->pixel_multiplier;
200
201 pipe_config->hw.adjusted_mode.crtc_clock = dotclock;
202
203 pipe_config->lane_count = 4;
204
205 intel_hdmi_read_gcp_infoframe(encoder, crtc_state: pipe_config);
206
207 intel_read_infoframe(encoder, crtc_state: pipe_config,
208 type: HDMI_INFOFRAME_TYPE_AVI,
209 frame: &pipe_config->infoframes.avi);
210 intel_read_infoframe(encoder, crtc_state: pipe_config,
211 type: HDMI_INFOFRAME_TYPE_SPD,
212 frame: &pipe_config->infoframes.spd);
213 intel_read_infoframe(encoder, crtc_state: pipe_config,
214 type: HDMI_INFOFRAME_TYPE_VENDOR,
215 frame: &pipe_config->infoframes.hdmi);
216
217 intel_audio_codec_get_config(encoder, crtc_state: pipe_config);
218}
219
220static void g4x_hdmi_enable_port(struct intel_encoder *encoder,
221 const struct intel_crtc_state *pipe_config)
222{
223 struct drm_device *dev = encoder->base.dev;
224 struct drm_i915_private *dev_priv = to_i915(dev);
225 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
226 u32 temp;
227
228 temp = intel_de_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
229
230 temp |= SDVO_ENABLE;
231
232 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
233 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
234}
235
236static void g4x_hdmi_audio_enable(struct intel_encoder *encoder,
237 const struct intel_crtc_state *crtc_state,
238 const struct drm_connector_state *conn_state)
239{
240 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
241 struct intel_hdmi *hdmi = enc_to_intel_hdmi(encoder);
242
243 if (!crtc_state->has_audio)
244 return;
245
246 drm_WARN_ON(&i915->drm, !crtc_state->has_hdmi_sink);
247
248 /* Enable audio presence detect */
249 intel_de_rmw(i915, reg: hdmi->hdmi_reg, clear: 0, HDMI_AUDIO_ENABLE);
250
251 intel_audio_codec_enable(encoder, crtc_state, conn_state);
252}
253
254static void g4x_hdmi_audio_disable(struct intel_encoder *encoder,
255 const struct intel_crtc_state *old_crtc_state,
256 const struct drm_connector_state *old_conn_state)
257{
258 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
259 struct intel_hdmi *hdmi = enc_to_intel_hdmi(encoder);
260
261 if (!old_crtc_state->has_audio)
262 return;
263
264 intel_audio_codec_disable(encoder, old_crtc_state, old_conn_state);
265
266 /* Disable audio presence detect */
267 intel_de_rmw(i915, reg: hdmi->hdmi_reg, HDMI_AUDIO_ENABLE, set: 0);
268}
269
270static void g4x_enable_hdmi(struct intel_atomic_state *state,
271 struct intel_encoder *encoder,
272 const struct intel_crtc_state *pipe_config,
273 const struct drm_connector_state *conn_state)
274{
275 g4x_hdmi_enable_port(encoder, pipe_config);
276}
277
278static void ibx_enable_hdmi(struct intel_atomic_state *state,
279 struct intel_encoder *encoder,
280 const struct intel_crtc_state *pipe_config,
281 const struct drm_connector_state *conn_state)
282{
283 struct drm_device *dev = encoder->base.dev;
284 struct drm_i915_private *dev_priv = to_i915(dev);
285 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
286 u32 temp;
287
288 temp = intel_de_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
289
290 temp |= SDVO_ENABLE;
291
292 /*
293 * HW workaround, need to write this twice for issue
294 * that may result in first write getting masked.
295 */
296 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
297 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
298 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
299 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
300
301 /*
302 * HW workaround, need to toggle enable bit off and on
303 * for 12bpc with pixel repeat.
304 *
305 * FIXME: BSpec says this should be done at the end of
306 * the modeset sequence, so not sure if this isn't too soon.
307 */
308 if (pipe_config->pipe_bpp > 24 &&
309 pipe_config->pixel_multiplier > 1) {
310 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg,
311 val: temp & ~SDVO_ENABLE);
312 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
313
314 /*
315 * HW workaround, need to write this twice for issue
316 * that may result in first write getting masked.
317 */
318 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
319 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
320 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
321 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
322 }
323}
324
325static void cpt_enable_hdmi(struct intel_atomic_state *state,
326 struct intel_encoder *encoder,
327 const struct intel_crtc_state *pipe_config,
328 const struct drm_connector_state *conn_state)
329{
330 struct drm_device *dev = encoder->base.dev;
331 struct drm_i915_private *dev_priv = to_i915(dev);
332 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
333 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
334 enum pipe pipe = crtc->pipe;
335 u32 temp;
336
337 temp = intel_de_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
338
339 temp |= SDVO_ENABLE;
340
341 /*
342 * WaEnableHDMI8bpcBefore12bpc:snb,ivb
343 *
344 * The procedure for 12bpc is as follows:
345 * 1. disable HDMI clock gating
346 * 2. enable HDMI with 8bpc
347 * 3. enable HDMI with 12bpc
348 * 4. enable HDMI clock gating
349 */
350
351 if (pipe_config->pipe_bpp > 24) {
352 intel_de_rmw(i915: dev_priv, TRANS_CHICKEN1(pipe),
353 clear: 0, TRANS_CHICKEN1_HDMIUNIT_GC_DISABLE);
354
355 temp &= ~SDVO_COLOR_FORMAT_MASK;
356 temp |= SDVO_COLOR_FORMAT_8bpc;
357 }
358
359 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
360 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
361
362 if (pipe_config->pipe_bpp > 24) {
363 temp &= ~SDVO_COLOR_FORMAT_MASK;
364 temp |= HDMI_COLOR_FORMAT_12bpc;
365
366 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
367 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
368
369 intel_de_rmw(i915: dev_priv, TRANS_CHICKEN1(pipe),
370 TRANS_CHICKEN1_HDMIUNIT_GC_DISABLE, set: 0);
371 }
372}
373
374static void vlv_enable_hdmi(struct intel_atomic_state *state,
375 struct intel_encoder *encoder,
376 const struct intel_crtc_state *pipe_config,
377 const struct drm_connector_state *conn_state)
378{
379}
380
381static void intel_disable_hdmi(struct intel_atomic_state *state,
382 struct intel_encoder *encoder,
383 const struct intel_crtc_state *old_crtc_state,
384 const struct drm_connector_state *old_conn_state)
385{
386 struct drm_device *dev = encoder->base.dev;
387 struct drm_i915_private *dev_priv = to_i915(dev);
388 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
389 struct intel_digital_port *dig_port =
390 hdmi_to_dig_port(intel_hdmi);
391 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
392 u32 temp;
393
394 temp = intel_de_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
395
396 temp &= ~SDVO_ENABLE;
397 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
398 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
399
400 /*
401 * HW workaround for IBX, we need to move the port
402 * to transcoder A after disabling it to allow the
403 * matching DP port to be enabled on transcoder A.
404 */
405 if (HAS_PCH_IBX(dev_priv) && crtc->pipe == PIPE_B) {
406 /*
407 * We get CPU/PCH FIFO underruns on the other pipe when
408 * doing the workaround. Sweep them under the rug.
409 */
410 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe: PIPE_A, enable: false);
411 intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder: PIPE_A, enable: false);
412
413 temp &= ~SDVO_PIPE_SEL_MASK;
414 temp |= SDVO_ENABLE | SDVO_PIPE_SEL(PIPE_A);
415 /*
416 * HW workaround, need to write this twice for issue
417 * that may result in first write getting masked.
418 */
419 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
420 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
421 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
422 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
423
424 temp &= ~SDVO_ENABLE;
425 intel_de_write(i915: dev_priv, reg: intel_hdmi->hdmi_reg, val: temp);
426 intel_de_posting_read(i915: dev_priv, reg: intel_hdmi->hdmi_reg);
427
428 intel_wait_for_vblank_if_active(i915: dev_priv, pipe: PIPE_A);
429 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe: PIPE_A, enable: true);
430 intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder: PIPE_A, enable: true);
431 }
432
433 dig_port->set_infoframes(encoder,
434 false,
435 old_crtc_state, old_conn_state);
436
437 intel_dp_dual_mode_set_tmds_output(hdmi: intel_hdmi, enable: false);
438}
439
440static void g4x_disable_hdmi(struct intel_atomic_state *state,
441 struct intel_encoder *encoder,
442 const struct intel_crtc_state *old_crtc_state,
443 const struct drm_connector_state *old_conn_state)
444{
445 intel_disable_hdmi(state, encoder, old_crtc_state, old_conn_state);
446}
447
448static void pch_disable_hdmi(struct intel_atomic_state *state,
449 struct intel_encoder *encoder,
450 const struct intel_crtc_state *old_crtc_state,
451 const struct drm_connector_state *old_conn_state)
452{
453}
454
455static void pch_post_disable_hdmi(struct intel_atomic_state *state,
456 struct intel_encoder *encoder,
457 const struct intel_crtc_state *old_crtc_state,
458 const struct drm_connector_state *old_conn_state)
459{
460 intel_disable_hdmi(state, encoder, old_crtc_state, old_conn_state);
461}
462
463static void intel_hdmi_pre_enable(struct intel_atomic_state *state,
464 struct intel_encoder *encoder,
465 const struct intel_crtc_state *pipe_config,
466 const struct drm_connector_state *conn_state)
467{
468 struct intel_digital_port *dig_port =
469 enc_to_dig_port(encoder);
470
471 intel_hdmi_prepare(encoder, crtc_state: pipe_config);
472
473 dig_port->set_infoframes(encoder,
474 pipe_config->has_infoframe,
475 pipe_config, conn_state);
476}
477
478static void vlv_hdmi_pre_enable(struct intel_atomic_state *state,
479 struct intel_encoder *encoder,
480 const struct intel_crtc_state *pipe_config,
481 const struct drm_connector_state *conn_state)
482{
483 struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
484 struct drm_i915_private *dev_priv = to_i915(dev: encoder->base.dev);
485
486 vlv_phy_pre_encoder_enable(encoder, crtc_state: pipe_config);
487
488 /* HDMI 1.0V-2dB */
489 vlv_set_phy_signal_level(encoder, crtc_state: pipe_config,
490 demph_reg_value: 0x2b245f5f, preemph_reg_value: 0x00002000,
491 uniqtranscale_reg_value: 0x5578b83a, tx3_demph: 0x2b247878);
492
493 dig_port->set_infoframes(encoder,
494 pipe_config->has_infoframe,
495 pipe_config, conn_state);
496
497 g4x_hdmi_enable_port(encoder, pipe_config);
498
499 vlv_wait_port_ready(dev_priv, dig_port, expected_mask: 0x0);
500}
501
502static void vlv_hdmi_pre_pll_enable(struct intel_atomic_state *state,
503 struct intel_encoder *encoder,
504 const struct intel_crtc_state *pipe_config,
505 const struct drm_connector_state *conn_state)
506{
507 intel_hdmi_prepare(encoder, crtc_state: pipe_config);
508
509 vlv_phy_pre_pll_enable(encoder, crtc_state: pipe_config);
510}
511
512static void chv_hdmi_pre_pll_enable(struct intel_atomic_state *state,
513 struct intel_encoder *encoder,
514 const struct intel_crtc_state *pipe_config,
515 const struct drm_connector_state *conn_state)
516{
517 intel_hdmi_prepare(encoder, crtc_state: pipe_config);
518
519 chv_phy_pre_pll_enable(encoder, crtc_state: pipe_config);
520}
521
522static void chv_hdmi_post_pll_disable(struct intel_atomic_state *state,
523 struct intel_encoder *encoder,
524 const struct intel_crtc_state *old_crtc_state,
525 const struct drm_connector_state *old_conn_state)
526{
527 chv_phy_post_pll_disable(encoder, old_crtc_state);
528}
529
530static void vlv_hdmi_post_disable(struct intel_atomic_state *state,
531 struct intel_encoder *encoder,
532 const struct intel_crtc_state *old_crtc_state,
533 const struct drm_connector_state *old_conn_state)
534{
535 /* Reset lanes to avoid HDMI flicker (VLV w/a) */
536 vlv_phy_reset_lanes(encoder, old_crtc_state);
537}
538
539static void chv_hdmi_post_disable(struct intel_atomic_state *state,
540 struct intel_encoder *encoder,
541 const struct intel_crtc_state *old_crtc_state,
542 const struct drm_connector_state *old_conn_state)
543{
544 struct drm_device *dev = encoder->base.dev;
545 struct drm_i915_private *dev_priv = to_i915(dev);
546
547 vlv_dpio_get(i915: dev_priv);
548
549 /* Assert data lane reset */
550 chv_data_lane_soft_reset(encoder, crtc_state: old_crtc_state, reset: true);
551
552 vlv_dpio_put(i915: dev_priv);
553}
554
555static void chv_hdmi_pre_enable(struct intel_atomic_state *state,
556 struct intel_encoder *encoder,
557 const struct intel_crtc_state *pipe_config,
558 const struct drm_connector_state *conn_state)
559{
560 struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
561 struct drm_device *dev = encoder->base.dev;
562 struct drm_i915_private *dev_priv = to_i915(dev);
563
564 chv_phy_pre_encoder_enable(encoder, crtc_state: pipe_config);
565
566 /* FIXME: Program the support xxx V-dB */
567 /* Use 800mV-0dB */
568 chv_set_phy_signal_level(encoder, crtc_state: pipe_config, deemph_reg_value: 128, margin_reg_value: 102, uniq_trans_scale: false);
569
570 dig_port->set_infoframes(encoder,
571 pipe_config->has_infoframe,
572 pipe_config, conn_state);
573
574 g4x_hdmi_enable_port(encoder, pipe_config);
575
576 vlv_wait_port_ready(dev_priv, dig_port, expected_mask: 0x0);
577
578 /* Second common lane will stay alive on its own now */
579 chv_phy_release_cl2_override(encoder);
580}
581
582static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
583 .destroy = intel_encoder_destroy,
584};
585
586static enum intel_hotplug_state
587intel_hdmi_hotplug(struct intel_encoder *encoder,
588 struct intel_connector *connector)
589{
590 enum intel_hotplug_state state;
591
592 state = intel_encoder_hotplug(encoder, connector);
593
594 /*
595 * On many platforms the HDMI live state signal is known to be
596 * unreliable, so we can't use it to detect if a sink is connected or
597 * not. Instead we detect if it's connected based on whether we can
598 * read the EDID or not. That in turn has a problem during disconnect,
599 * since the HPD interrupt may be raised before the DDC lines get
600 * disconnected (due to how the required length of DDC vs. HPD
601 * connector pins are specified) and so we'll still be able to get a
602 * valid EDID. To solve this schedule another detection cycle if this
603 * time around we didn't detect any change in the sink's connection
604 * status.
605 */
606 if (state == INTEL_HOTPLUG_UNCHANGED && !connector->hotplug_retries)
607 state = INTEL_HOTPLUG_RETRY;
608
609 return state;
610}
611
612int g4x_hdmi_connector_atomic_check(struct drm_connector *connector,
613 struct drm_atomic_state *state)
614{
615 struct drm_i915_private *i915 = to_i915(dev: state->dev);
616 struct drm_connector_list_iter conn_iter;
617 struct drm_connector *conn;
618 int ret;
619
620 ret = intel_digital_connector_atomic_check(conn: connector, state);
621 if (ret)
622 return ret;
623
624 if (!IS_G4X(i915))
625 return 0;
626
627 if (!intel_connector_needs_modeset(to_intel_atomic_state(state), connector))
628 return 0;
629
630 /*
631 * On g4x only one HDMI port can transmit infoframes/audio
632 * at any given time. Make sure all enabled HDMI ports are
633 * included in the state so that it's possible to select
634 * one of them for this duty.
635 *
636 * See also g4x_compute_has_hdmi_sink().
637 */
638 drm_connector_list_iter_begin(dev: &i915->drm, iter: &conn_iter);
639 drm_for_each_connector_iter(conn, &conn_iter) {
640 struct drm_connector_state *conn_state;
641 struct drm_crtc_state *crtc_state;
642 struct drm_crtc *crtc;
643
644 if (!connector_is_hdmi(connector: conn))
645 continue;
646
647 drm_dbg_kms(&i915->drm, "Adding [CONNECTOR:%d:%s]\n",
648 conn->base.id, conn->name);
649
650 conn_state = drm_atomic_get_connector_state(state, connector: conn);
651 if (IS_ERR(ptr: conn_state)) {
652 ret = PTR_ERR(ptr: conn_state);
653 break;
654 }
655
656 crtc = conn_state->crtc;
657 if (!crtc)
658 continue;
659
660 crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
661 crtc_state->mode_changed = true;
662
663 ret = drm_atomic_add_affected_planes(state, crtc);
664 if (ret)
665 break;
666 }
667 drm_connector_list_iter_end(iter: &conn_iter);
668
669 return ret;
670}
671
672static bool is_hdmi_port_valid(struct drm_i915_private *i915, enum port port)
673{
674 if (IS_G4X(i915) || IS_VALLEYVIEW(i915))
675 return port == PORT_B || port == PORT_C;
676 else
677 return port == PORT_B || port == PORT_C || port == PORT_D;
678}
679
680static bool assert_hdmi_port_valid(struct drm_i915_private *i915, enum port port)
681{
682 return !drm_WARN(&i915->drm, !is_hdmi_port_valid(i915, port),
683 "Platform does not support HDMI %c\n", port_name(port));
684}
685
686void g4x_hdmi_init(struct drm_i915_private *dev_priv,
687 i915_reg_t hdmi_reg, enum port port)
688{
689 const struct intel_bios_encoder_data *devdata;
690 struct intel_digital_port *dig_port;
691 struct intel_encoder *intel_encoder;
692 struct intel_connector *intel_connector;
693
694 if (!assert_port_valid(i915: dev_priv, port))
695 return;
696
697 if (!assert_hdmi_port_valid(i915: dev_priv, port))
698 return;
699
700 devdata = intel_bios_encoder_data_lookup(i915: dev_priv, port);
701
702 /* FIXME bail? */
703 if (!devdata)
704 drm_dbg_kms(&dev_priv->drm, "No VBT child device for HDMI-%c\n",
705 port_name(port));
706
707 dig_port = kzalloc(size: sizeof(*dig_port), GFP_KERNEL);
708 if (!dig_port)
709 return;
710
711 dig_port->aux_ch = AUX_CH_NONE;
712
713 intel_connector = intel_connector_alloc();
714 if (!intel_connector) {
715 kfree(objp: dig_port);
716 return;
717 }
718
719 intel_encoder = &dig_port->base;
720
721 intel_encoder->devdata = devdata;
722
723 mutex_init(&dig_port->hdcp_mutex);
724
725 drm_encoder_init(dev: &dev_priv->drm, encoder: &intel_encoder->base,
726 funcs: &intel_hdmi_enc_funcs, DRM_MODE_ENCODER_TMDS,
727 name: "HDMI %c", port_name(port));
728
729 intel_encoder->hotplug = intel_hdmi_hotplug;
730 intel_encoder->compute_config = g4x_hdmi_compute_config;
731 if (HAS_PCH_SPLIT(dev_priv)) {
732 intel_encoder->disable = pch_disable_hdmi;
733 intel_encoder->post_disable = pch_post_disable_hdmi;
734 } else {
735 intel_encoder->disable = g4x_disable_hdmi;
736 }
737 intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
738 intel_encoder->get_config = intel_hdmi_get_config;
739 if (IS_CHERRYVIEW(dev_priv)) {
740 intel_encoder->pre_pll_enable = chv_hdmi_pre_pll_enable;
741 intel_encoder->pre_enable = chv_hdmi_pre_enable;
742 intel_encoder->enable = vlv_enable_hdmi;
743 intel_encoder->post_disable = chv_hdmi_post_disable;
744 intel_encoder->post_pll_disable = chv_hdmi_post_pll_disable;
745 } else if (IS_VALLEYVIEW(dev_priv)) {
746 intel_encoder->pre_pll_enable = vlv_hdmi_pre_pll_enable;
747 intel_encoder->pre_enable = vlv_hdmi_pre_enable;
748 intel_encoder->enable = vlv_enable_hdmi;
749 intel_encoder->post_disable = vlv_hdmi_post_disable;
750 } else {
751 intel_encoder->pre_enable = intel_hdmi_pre_enable;
752 if (HAS_PCH_CPT(dev_priv))
753 intel_encoder->enable = cpt_enable_hdmi;
754 else if (HAS_PCH_IBX(dev_priv))
755 intel_encoder->enable = ibx_enable_hdmi;
756 else
757 intel_encoder->enable = g4x_enable_hdmi;
758 }
759 intel_encoder->audio_enable = g4x_hdmi_audio_enable;
760 intel_encoder->audio_disable = g4x_hdmi_audio_disable;
761 intel_encoder->shutdown = intel_hdmi_encoder_shutdown;
762
763 intel_encoder->type = INTEL_OUTPUT_HDMI;
764 intel_encoder->power_domain = intel_display_power_ddi_lanes_domain(i915: dev_priv, port);
765 intel_encoder->port = port;
766 if (IS_CHERRYVIEW(dev_priv)) {
767 if (port == PORT_D)
768 intel_encoder->pipe_mask = BIT(PIPE_C);
769 else
770 intel_encoder->pipe_mask = BIT(PIPE_A) | BIT(PIPE_B);
771 } else {
772 intel_encoder->pipe_mask = ~0;
773 }
774 intel_encoder->cloneable = BIT(INTEL_OUTPUT_ANALOG);
775 intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
776 /*
777 * BSpec is unclear about HDMI+HDMI cloning on g4x, but it seems
778 * to work on real hardware. And since g4x can send infoframes to
779 * only one port anyway, nothing is lost by allowing it.
780 */
781 if (IS_G4X(dev_priv))
782 intel_encoder->cloneable |= BIT(INTEL_OUTPUT_HDMI);
783
784 dig_port->hdmi.hdmi_reg = hdmi_reg;
785 dig_port->dp.output_reg = INVALID_MMIO_REG;
786 dig_port->max_lanes = 4;
787
788 intel_infoframe_init(dig_port);
789
790 intel_hdmi_init_connector(dig_port, intel_connector);
791}
792

source code of linux/drivers/gpu/drm/i915/display/g4x_hdmi.c