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Merge remote-tracking branch 'battery/for-next'
[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_audio.c
1 /*
2 * Copyright © 2014 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/component.h>
26 #include <drm/i915_component.h>
27 #include "intel_drv.h"
28
29 #include <drm/drmP.h>
30 #include <drm/drm_edid.h>
31 #include "i915_drv.h"
32
33 /**
34 * DOC: High Definition Audio over HDMI and Display Port
35 *
36 * The graphics and audio drivers together support High Definition Audio over
37 * HDMI and Display Port. The audio programming sequences are divided into audio
38 * codec and controller enable and disable sequences. The graphics driver
39 * handles the audio codec sequences, while the audio driver handles the audio
40 * controller sequences.
41 *
42 * The disable sequences must be performed before disabling the transcoder or
43 * port. The enable sequences may only be performed after enabling the
44 * transcoder and port, and after completed link training. Therefore the audio
45 * enable/disable sequences are part of the modeset sequence.
46 *
47 * The codec and controller sequences could be done either parallel or serial,
48 * but generally the ELDV/PD change in the codec sequence indicates to the audio
49 * driver that the controller sequence should start. Indeed, most of the
50 * co-operation between the graphics and audio drivers is handled via audio
51 * related registers. (The notable exception is the power management, not
52 * covered here.)
53 *
54 * The struct &i915_audio_component is used to interact between the graphics
55 * and audio drivers. The struct &i915_audio_component_ops @ops in it is
56 * defined in graphics driver and called in audio driver. The
57 * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
58 */
59
60 static const struct {
61 int clock;
62 u32 config;
63 } hdmi_audio_clock[] = {
64 { 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
65 { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
66 { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
67 { 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
68 { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
69 { 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
70 { 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
71 { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
72 { 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
73 { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
74 };
75
76 /* HDMI N/CTS table */
77 #define TMDS_297M 297000
78 #define TMDS_296M 296703
79 static const struct {
80 int sample_rate;
81 int clock;
82 int n;
83 int cts;
84 } aud_ncts[] = {
85 { 44100, TMDS_296M, 4459, 234375 },
86 { 44100, TMDS_297M, 4704, 247500 },
87 { 48000, TMDS_296M, 5824, 281250 },
88 { 48000, TMDS_297M, 5120, 247500 },
89 { 32000, TMDS_296M, 5824, 421875 },
90 { 32000, TMDS_297M, 3072, 222750 },
91 { 88200, TMDS_296M, 8918, 234375 },
92 { 88200, TMDS_297M, 9408, 247500 },
93 { 96000, TMDS_296M, 11648, 281250 },
94 { 96000, TMDS_297M, 10240, 247500 },
95 { 176400, TMDS_296M, 17836, 234375 },
96 { 176400, TMDS_297M, 18816, 247500 },
97 { 192000, TMDS_296M, 23296, 281250 },
98 { 192000, TMDS_297M, 20480, 247500 },
99 };
100
101 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
102 static u32 audio_config_hdmi_pixel_clock(const struct drm_display_mode *adjusted_mode)
103 {
104 int i;
105
106 for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
107 if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock)
108 break;
109 }
110
111 if (i == ARRAY_SIZE(hdmi_audio_clock)) {
112 DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
113 adjusted_mode->crtc_clock);
114 i = 1;
115 }
116
117 DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n",
118 hdmi_audio_clock[i].clock,
119 hdmi_audio_clock[i].config);
120
121 return hdmi_audio_clock[i].config;
122 }
123
124 static int audio_config_get_n(const struct drm_display_mode *mode, int rate)
125 {
126 int i;
127
128 for (i = 0; i < ARRAY_SIZE(aud_ncts); i++) {
129 if ((rate == aud_ncts[i].sample_rate) &&
130 (mode->clock == aud_ncts[i].clock)) {
131 return aud_ncts[i].n;
132 }
133 }
134 return 0;
135 }
136
137 static uint32_t audio_config_setup_n_reg(int n, uint32_t val)
138 {
139 int n_low, n_up;
140 uint32_t tmp = val;
141
142 n_low = n & 0xfff;
143 n_up = (n >> 12) & 0xff;
144 tmp &= ~(AUD_CONFIG_UPPER_N_MASK | AUD_CONFIG_LOWER_N_MASK);
145 tmp |= ((n_up << AUD_CONFIG_UPPER_N_SHIFT) |
146 (n_low << AUD_CONFIG_LOWER_N_SHIFT) |
147 AUD_CONFIG_N_PROG_ENABLE);
148 return tmp;
149 }
150
151 /* check whether N/CTS/M need be set manually */
152 static bool audio_rate_need_prog(struct intel_crtc *crtc,
153 const struct drm_display_mode *mode)
154 {
155 if (((mode->clock == TMDS_297M) ||
156 (mode->clock == TMDS_296M)) &&
157 intel_crtc_has_type(crtc->config, INTEL_OUTPUT_HDMI))
158 return true;
159 else
160 return false;
161 }
162
163 static bool intel_eld_uptodate(struct drm_connector *connector,
164 i915_reg_t reg_eldv, uint32_t bits_eldv,
165 i915_reg_t reg_elda, uint32_t bits_elda,
166 i915_reg_t reg_edid)
167 {
168 struct drm_i915_private *dev_priv = to_i915(connector->dev);
169 uint8_t *eld = connector->eld;
170 uint32_t tmp;
171 int i;
172
173 tmp = I915_READ(reg_eldv);
174 tmp &= bits_eldv;
175
176 if (!tmp)
177 return false;
178
179 tmp = I915_READ(reg_elda);
180 tmp &= ~bits_elda;
181 I915_WRITE(reg_elda, tmp);
182
183 for (i = 0; i < drm_eld_size(eld) / 4; i++)
184 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
185 return false;
186
187 return true;
188 }
189
190 static void g4x_audio_codec_disable(struct intel_encoder *encoder)
191 {
192 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
193 uint32_t eldv, tmp;
194
195 DRM_DEBUG_KMS("Disable audio codec\n");
196
197 tmp = I915_READ(G4X_AUD_VID_DID);
198 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
199 eldv = G4X_ELDV_DEVCL_DEVBLC;
200 else
201 eldv = G4X_ELDV_DEVCTG;
202
203 /* Invalidate ELD */
204 tmp = I915_READ(G4X_AUD_CNTL_ST);
205 tmp &= ~eldv;
206 I915_WRITE(G4X_AUD_CNTL_ST, tmp);
207 }
208
209 static void g4x_audio_codec_enable(struct drm_connector *connector,
210 struct intel_encoder *encoder,
211 const struct drm_display_mode *adjusted_mode)
212 {
213 struct drm_i915_private *dev_priv = to_i915(connector->dev);
214 uint8_t *eld = connector->eld;
215 uint32_t eldv;
216 uint32_t tmp;
217 int len, i;
218
219 DRM_DEBUG_KMS("Enable audio codec, %u bytes ELD\n", eld[2]);
220
221 tmp = I915_READ(G4X_AUD_VID_DID);
222 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
223 eldv = G4X_ELDV_DEVCL_DEVBLC;
224 else
225 eldv = G4X_ELDV_DEVCTG;
226
227 if (intel_eld_uptodate(connector,
228 G4X_AUD_CNTL_ST, eldv,
229 G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK,
230 G4X_HDMIW_HDMIEDID))
231 return;
232
233 tmp = I915_READ(G4X_AUD_CNTL_ST);
234 tmp &= ~(eldv | G4X_ELD_ADDR_MASK);
235 len = (tmp >> 9) & 0x1f; /* ELD buffer size */
236 I915_WRITE(G4X_AUD_CNTL_ST, tmp);
237
238 len = min(drm_eld_size(eld) / 4, len);
239 DRM_DEBUG_DRIVER("ELD size %d\n", len);
240 for (i = 0; i < len; i++)
241 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
242
243 tmp = I915_READ(G4X_AUD_CNTL_ST);
244 tmp |= eldv;
245 I915_WRITE(G4X_AUD_CNTL_ST, tmp);
246 }
247
248 static void hsw_audio_codec_disable(struct intel_encoder *encoder)
249 {
250 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
251 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
252 enum pipe pipe = intel_crtc->pipe;
253 uint32_t tmp;
254
255 DRM_DEBUG_KMS("Disable audio codec on pipe %c\n", pipe_name(pipe));
256
257 mutex_lock(&dev_priv->av_mutex);
258
259 /* Disable timestamps */
260 tmp = I915_READ(HSW_AUD_CFG(pipe));
261 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
262 tmp |= AUD_CONFIG_N_PROG_ENABLE;
263 tmp &= ~AUD_CONFIG_UPPER_N_MASK;
264 tmp &= ~AUD_CONFIG_LOWER_N_MASK;
265 if (intel_crtc_has_dp_encoder(intel_crtc->config))
266 tmp |= AUD_CONFIG_N_VALUE_INDEX;
267 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
268
269 /* Invalidate ELD */
270 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
271 tmp &= ~AUDIO_ELD_VALID(pipe);
272 tmp &= ~AUDIO_OUTPUT_ENABLE(pipe);
273 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
274
275 mutex_unlock(&dev_priv->av_mutex);
276 }
277
278 static void hsw_audio_codec_enable(struct drm_connector *connector,
279 struct intel_encoder *encoder,
280 const struct drm_display_mode *adjusted_mode)
281 {
282 struct drm_i915_private *dev_priv = to_i915(connector->dev);
283 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
284 enum pipe pipe = intel_crtc->pipe;
285 struct i915_audio_component *acomp = dev_priv->audio_component;
286 const uint8_t *eld = connector->eld;
287 struct intel_digital_port *intel_dig_port =
288 enc_to_dig_port(&encoder->base);
289 enum port port = intel_dig_port->port;
290 uint32_t tmp;
291 int len, i;
292 int n, rate;
293
294 DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n",
295 pipe_name(pipe), drm_eld_size(eld));
296
297 mutex_lock(&dev_priv->av_mutex);
298
299 /* Enable audio presence detect, invalidate ELD */
300 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
301 tmp |= AUDIO_OUTPUT_ENABLE(pipe);
302 tmp &= ~AUDIO_ELD_VALID(pipe);
303 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
304
305 /*
306 * FIXME: We're supposed to wait for vblank here, but we have vblanks
307 * disabled during the mode set. The proper fix would be to push the
308 * rest of the setup into a vblank work item, queued here, but the
309 * infrastructure is not there yet.
310 */
311
312 /* Reset ELD write address */
313 tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(pipe));
314 tmp &= ~IBX_ELD_ADDRESS_MASK;
315 I915_WRITE(HSW_AUD_DIP_ELD_CTRL(pipe), tmp);
316
317 /* Up to 84 bytes of hw ELD buffer */
318 len = min(drm_eld_size(eld), 84);
319 for (i = 0; i < len / 4; i++)
320 I915_WRITE(HSW_AUD_EDID_DATA(pipe), *((uint32_t *)eld + i));
321
322 /* ELD valid */
323 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
324 tmp |= AUDIO_ELD_VALID(pipe);
325 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
326
327 /* Enable timestamps */
328 tmp = I915_READ(HSW_AUD_CFG(pipe));
329 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
330 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
331 if (intel_crtc_has_dp_encoder(intel_crtc->config))
332 tmp |= AUD_CONFIG_N_VALUE_INDEX;
333 else
334 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode);
335
336 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
337 if (audio_rate_need_prog(intel_crtc, adjusted_mode)) {
338 if (!acomp)
339 rate = 0;
340 else if (port >= PORT_A && port <= PORT_E)
341 rate = acomp->aud_sample_rate[port];
342 else {
343 DRM_ERROR("invalid port: %d\n", port);
344 rate = 0;
345 }
346 n = audio_config_get_n(adjusted_mode, rate);
347 if (n != 0)
348 tmp = audio_config_setup_n_reg(n, tmp);
349 else
350 DRM_DEBUG_KMS("no suitable N value is found\n");
351 }
352
353 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
354
355 mutex_unlock(&dev_priv->av_mutex);
356 }
357
358 static void ilk_audio_codec_disable(struct intel_encoder *encoder)
359 {
360 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
361 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
362 enum port port = enc_to_dig_port(&encoder->base)->port;
363 enum pipe pipe = intel_crtc->pipe;
364 uint32_t tmp, eldv;
365 i915_reg_t aud_config, aud_cntrl_st2;
366
367 DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n",
368 port_name(port), pipe_name(pipe));
369
370 if (WARN_ON(port == PORT_A))
371 return;
372
373 if (HAS_PCH_IBX(dev_priv)) {
374 aud_config = IBX_AUD_CFG(pipe);
375 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
376 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
377 aud_config = VLV_AUD_CFG(pipe);
378 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
379 } else {
380 aud_config = CPT_AUD_CFG(pipe);
381 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
382 }
383
384 /* Disable timestamps */
385 tmp = I915_READ(aud_config);
386 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
387 tmp |= AUD_CONFIG_N_PROG_ENABLE;
388 tmp &= ~AUD_CONFIG_UPPER_N_MASK;
389 tmp &= ~AUD_CONFIG_LOWER_N_MASK;
390 if (intel_crtc_has_dp_encoder(intel_crtc->config))
391 tmp |= AUD_CONFIG_N_VALUE_INDEX;
392 I915_WRITE(aud_config, tmp);
393
394 eldv = IBX_ELD_VALID(port);
395
396 /* Invalidate ELD */
397 tmp = I915_READ(aud_cntrl_st2);
398 tmp &= ~eldv;
399 I915_WRITE(aud_cntrl_st2, tmp);
400 }
401
402 static void ilk_audio_codec_enable(struct drm_connector *connector,
403 struct intel_encoder *encoder,
404 const struct drm_display_mode *adjusted_mode)
405 {
406 struct drm_i915_private *dev_priv = to_i915(connector->dev);
407 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
408 enum port port = enc_to_dig_port(&encoder->base)->port;
409 enum pipe pipe = intel_crtc->pipe;
410 uint8_t *eld = connector->eld;
411 uint32_t tmp, eldv;
412 int len, i;
413 i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
414
415 DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n",
416 port_name(port), pipe_name(pipe), drm_eld_size(eld));
417
418 if (WARN_ON(port == PORT_A))
419 return;
420
421 /*
422 * FIXME: We're supposed to wait for vblank here, but we have vblanks
423 * disabled during the mode set. The proper fix would be to push the
424 * rest of the setup into a vblank work item, queued here, but the
425 * infrastructure is not there yet.
426 */
427
428 if (HAS_PCH_IBX(connector->dev)) {
429 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
430 aud_config = IBX_AUD_CFG(pipe);
431 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
432 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
433 } else if (IS_VALLEYVIEW(connector->dev) ||
434 IS_CHERRYVIEW(connector->dev)) {
435 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
436 aud_config = VLV_AUD_CFG(pipe);
437 aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
438 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
439 } else {
440 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
441 aud_config = CPT_AUD_CFG(pipe);
442 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
443 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
444 }
445
446 eldv = IBX_ELD_VALID(port);
447
448 /* Invalidate ELD */
449 tmp = I915_READ(aud_cntrl_st2);
450 tmp &= ~eldv;
451 I915_WRITE(aud_cntrl_st2, tmp);
452
453 /* Reset ELD write address */
454 tmp = I915_READ(aud_cntl_st);
455 tmp &= ~IBX_ELD_ADDRESS_MASK;
456 I915_WRITE(aud_cntl_st, tmp);
457
458 /* Up to 84 bytes of hw ELD buffer */
459 len = min(drm_eld_size(eld), 84);
460 for (i = 0; i < len / 4; i++)
461 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
462
463 /* ELD valid */
464 tmp = I915_READ(aud_cntrl_st2);
465 tmp |= eldv;
466 I915_WRITE(aud_cntrl_st2, tmp);
467
468 /* Enable timestamps */
469 tmp = I915_READ(aud_config);
470 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
471 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
472 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
473 if (intel_crtc_has_dp_encoder(intel_crtc->config))
474 tmp |= AUD_CONFIG_N_VALUE_INDEX;
475 else
476 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode);
477 I915_WRITE(aud_config, tmp);
478 }
479
480 /**
481 * intel_audio_codec_enable - Enable the audio codec for HD audio
482 * @intel_encoder: encoder on which to enable audio
483 *
484 * The enable sequences may only be performed after enabling the transcoder and
485 * port, and after completed link training.
486 */
487 void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
488 {
489 struct drm_encoder *encoder = &intel_encoder->base;
490 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc);
491 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
492 struct drm_connector *connector;
493 struct drm_device *dev = encoder->dev;
494 struct drm_i915_private *dev_priv = to_i915(dev);
495 struct i915_audio_component *acomp = dev_priv->audio_component;
496 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
497 enum port port = intel_dig_port->port;
498
499 connector = drm_select_eld(encoder);
500 if (!connector)
501 return;
502
503 DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
504 connector->base.id,
505 connector->name,
506 connector->encoder->base.id,
507 connector->encoder->name);
508
509 /* ELD Conn_Type */
510 connector->eld[5] &= ~(3 << 2);
511 if (intel_crtc_has_dp_encoder(crtc->config))
512 connector->eld[5] |= (1 << 2);
513
514 connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
515
516 if (dev_priv->display.audio_codec_enable)
517 dev_priv->display.audio_codec_enable(connector, intel_encoder,
518 adjusted_mode);
519
520 mutex_lock(&dev_priv->av_mutex);
521 intel_dig_port->audio_connector = connector;
522 /* referred in audio callbacks */
523 dev_priv->dig_port_map[port] = intel_encoder;
524 mutex_unlock(&dev_priv->av_mutex);
525
526 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
527 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port);
528 }
529
530 /**
531 * intel_audio_codec_disable - Disable the audio codec for HD audio
532 * @intel_encoder: encoder on which to disable audio
533 *
534 * The disable sequences must be performed before disabling the transcoder or
535 * port.
536 */
537 void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
538 {
539 struct drm_encoder *encoder = &intel_encoder->base;
540 struct drm_device *dev = encoder->dev;
541 struct drm_i915_private *dev_priv = to_i915(dev);
542 struct i915_audio_component *acomp = dev_priv->audio_component;
543 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
544 enum port port = intel_dig_port->port;
545
546 if (dev_priv->display.audio_codec_disable)
547 dev_priv->display.audio_codec_disable(intel_encoder);
548
549 mutex_lock(&dev_priv->av_mutex);
550 intel_dig_port->audio_connector = NULL;
551 dev_priv->dig_port_map[port] = NULL;
552 mutex_unlock(&dev_priv->av_mutex);
553
554 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
555 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port);
556 }
557
558 /**
559 * intel_init_audio_hooks - Set up chip specific audio hooks
560 * @dev_priv: device private
561 */
562 void intel_init_audio_hooks(struct drm_i915_private *dev_priv)
563 {
564 if (IS_G4X(dev_priv)) {
565 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable;
566 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable;
567 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
568 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
569 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
570 } else if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8) {
571 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable;
572 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable;
573 } else if (HAS_PCH_SPLIT(dev_priv)) {
574 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
575 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
576 }
577 }
578
579 static void i915_audio_component_get_power(struct device *kdev)
580 {
581 intel_display_power_get(kdev_to_i915(kdev), POWER_DOMAIN_AUDIO);
582 }
583
584 static void i915_audio_component_put_power(struct device *kdev)
585 {
586 intel_display_power_put(kdev_to_i915(kdev), POWER_DOMAIN_AUDIO);
587 }
588
589 static void i915_audio_component_codec_wake_override(struct device *kdev,
590 bool enable)
591 {
592 struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
593 u32 tmp;
594
595 if (!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv))
596 return;
597
598 i915_audio_component_get_power(kdev);
599
600 /*
601 * Enable/disable generating the codec wake signal, overriding the
602 * internal logic to generate the codec wake to controller.
603 */
604 tmp = I915_READ(HSW_AUD_CHICKENBIT);
605 tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL;
606 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
607 usleep_range(1000, 1500);
608
609 if (enable) {
610 tmp = I915_READ(HSW_AUD_CHICKENBIT);
611 tmp |= SKL_AUD_CODEC_WAKE_SIGNAL;
612 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
613 usleep_range(1000, 1500);
614 }
615
616 i915_audio_component_put_power(kdev);
617 }
618
619 /* Get CDCLK in kHz */
620 static int i915_audio_component_get_cdclk_freq(struct device *kdev)
621 {
622 struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
623
624 if (WARN_ON_ONCE(!HAS_DDI(dev_priv)))
625 return -ENODEV;
626
627 return dev_priv->cdclk_freq;
628 }
629
630 static int i915_audio_component_sync_audio_rate(struct device *kdev,
631 int port, int rate)
632 {
633 struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
634 struct intel_encoder *intel_encoder;
635 struct intel_crtc *crtc;
636 struct drm_display_mode *mode;
637 struct i915_audio_component *acomp = dev_priv->audio_component;
638 enum pipe pipe = INVALID_PIPE;
639 u32 tmp;
640 int n;
641 int err = 0;
642
643 /* HSW, BDW, SKL, KBL need this fix */
644 if (!IS_SKYLAKE(dev_priv) &&
645 !IS_KABYLAKE(dev_priv) &&
646 !IS_BROADWELL(dev_priv) &&
647 !IS_HASWELL(dev_priv))
648 return 0;
649
650 i915_audio_component_get_power(kdev);
651 mutex_lock(&dev_priv->av_mutex);
652 /* 1. get the pipe */
653 intel_encoder = dev_priv->dig_port_map[port];
654 /* intel_encoder might be NULL for DP MST */
655 if (!intel_encoder || !intel_encoder->base.crtc ||
656 intel_encoder->type != INTEL_OUTPUT_HDMI) {
657 DRM_DEBUG_KMS("no valid port %c\n", port_name(port));
658 err = -ENODEV;
659 goto unlock;
660 }
661 crtc = to_intel_crtc(intel_encoder->base.crtc);
662 pipe = crtc->pipe;
663 if (pipe == INVALID_PIPE) {
664 DRM_DEBUG_KMS("no pipe for the port %c\n", port_name(port));
665 err = -ENODEV;
666 goto unlock;
667 }
668
669 DRM_DEBUG_KMS("pipe %c connects port %c\n",
670 pipe_name(pipe), port_name(port));
671 mode = &crtc->config->base.adjusted_mode;
672
673 /* port must be valid now, otherwise the pipe will be invalid */
674 acomp->aud_sample_rate[port] = rate;
675
676 /* 2. check whether to set the N/CTS/M manually or not */
677 if (!audio_rate_need_prog(crtc, mode)) {
678 tmp = I915_READ(HSW_AUD_CFG(pipe));
679 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
680 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
681 goto unlock;
682 }
683
684 n = audio_config_get_n(mode, rate);
685 if (n == 0) {
686 DRM_DEBUG_KMS("Using automatic mode for N value on port %c\n",
687 port_name(port));
688 tmp = I915_READ(HSW_AUD_CFG(pipe));
689 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
690 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
691 goto unlock;
692 }
693
694 /* 3. set the N/CTS/M */
695 tmp = I915_READ(HSW_AUD_CFG(pipe));
696 tmp = audio_config_setup_n_reg(n, tmp);
697 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
698
699 unlock:
700 mutex_unlock(&dev_priv->av_mutex);
701 i915_audio_component_put_power(kdev);
702 return err;
703 }
704
705 static int i915_audio_component_get_eld(struct device *kdev, int port,
706 bool *enabled,
707 unsigned char *buf, int max_bytes)
708 {
709 struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
710 struct intel_encoder *intel_encoder;
711 struct intel_digital_port *intel_dig_port;
712 const u8 *eld;
713 int ret = -EINVAL;
714
715 mutex_lock(&dev_priv->av_mutex);
716 intel_encoder = dev_priv->dig_port_map[port];
717 /* intel_encoder might be NULL for DP MST */
718 if (intel_encoder) {
719 ret = 0;
720 intel_dig_port = enc_to_dig_port(&intel_encoder->base);
721 *enabled = intel_dig_port->audio_connector != NULL;
722 if (*enabled) {
723 eld = intel_dig_port->audio_connector->eld;
724 ret = drm_eld_size(eld);
725 memcpy(buf, eld, min(max_bytes, ret));
726 }
727 }
728
729 mutex_unlock(&dev_priv->av_mutex);
730 return ret;
731 }
732
733 static const struct i915_audio_component_ops i915_audio_component_ops = {
734 .owner = THIS_MODULE,
735 .get_power = i915_audio_component_get_power,
736 .put_power = i915_audio_component_put_power,
737 .codec_wake_override = i915_audio_component_codec_wake_override,
738 .get_cdclk_freq = i915_audio_component_get_cdclk_freq,
739 .sync_audio_rate = i915_audio_component_sync_audio_rate,
740 .get_eld = i915_audio_component_get_eld,
741 };
742
743 static int i915_audio_component_bind(struct device *i915_kdev,
744 struct device *hda_kdev, void *data)
745 {
746 struct i915_audio_component *acomp = data;
747 struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
748 int i;
749
750 if (WARN_ON(acomp->ops || acomp->dev))
751 return -EEXIST;
752
753 drm_modeset_lock_all(&dev_priv->drm);
754 acomp->ops = &i915_audio_component_ops;
755 acomp->dev = i915_kdev;
756 BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
757 for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
758 acomp->aud_sample_rate[i] = 0;
759 dev_priv->audio_component = acomp;
760 drm_modeset_unlock_all(&dev_priv->drm);
761
762 return 0;
763 }
764
765 static void i915_audio_component_unbind(struct device *i915_kdev,
766 struct device *hda_kdev, void *data)
767 {
768 struct i915_audio_component *acomp = data;
769 struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
770
771 drm_modeset_lock_all(&dev_priv->drm);
772 acomp->ops = NULL;
773 acomp->dev = NULL;
774 dev_priv->audio_component = NULL;
775 drm_modeset_unlock_all(&dev_priv->drm);
776 }
777
778 static const struct component_ops i915_audio_component_bind_ops = {
779 .bind = i915_audio_component_bind,
780 .unbind = i915_audio_component_unbind,
781 };
782
783 /**
784 * i915_audio_component_init - initialize and register the audio component
785 * @dev_priv: i915 device instance
786 *
787 * This will register with the component framework a child component which
788 * will bind dynamically to the snd_hda_intel driver's corresponding master
789 * component when the latter is registered. During binding the child
790 * initializes an instance of struct i915_audio_component which it receives
791 * from the master. The master can then start to use the interface defined by
792 * this struct. Each side can break the binding at any point by deregistering
793 * its own component after which each side's component unbind callback is
794 * called.
795 *
796 * We ignore any error during registration and continue with reduced
797 * functionality (i.e. without HDMI audio).
798 */
799 void i915_audio_component_init(struct drm_i915_private *dev_priv)
800 {
801 int ret;
802
803 ret = component_add(dev_priv->drm.dev, &i915_audio_component_bind_ops);
804 if (ret < 0) {
805 DRM_ERROR("failed to add audio component (%d)\n", ret);
806 /* continue with reduced functionality */
807 return;
808 }
809
810 dev_priv->audio_component_registered = true;
811 }
812
813 /**
814 * i915_audio_component_cleanup - deregister the audio component
815 * @dev_priv: i915 device instance
816 *
817 * Deregisters the audio component, breaking any existing binding to the
818 * corresponding snd_hda_intel driver's master component.
819 */
820 void i915_audio_component_cleanup(struct drm_i915_private *dev_priv)
821 {
822 if (!dev_priv->audio_component_registered)
823 return;
824
825 component_del(dev_priv->drm.dev, &i915_audio_component_bind_ops);
826 dev_priv->audio_component_registered = false;
827 }
Linux kernel - Deliverables
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