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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
60static 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
79static 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 */
102static 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
124static 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
137static 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 */
152static 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_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
158 return true;
159 else
160 return false;
161}
162
163static 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 = connector->dev->dev_private;
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
190static void g4x_audio_codec_disable(struct intel_encoder *encoder)
191{
192 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
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
209static 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 = connector->dev->dev_private;
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
248static void hsw_audio_codec_disable(struct intel_encoder *encoder)
249{
250 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
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_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
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
278static 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 = connector->dev->dev_private;
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_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
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
358static void ilk_audio_codec_disable(struct intel_encoder *encoder)
359{
360 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
361 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
362 struct intel_digital_port *intel_dig_port =
363 enc_to_dig_port(&encoder->base);
364 enum port port = intel_dig_port->port;
365 enum pipe pipe = intel_crtc->pipe;
366 uint32_t tmp, eldv;
367 i915_reg_t aud_config, aud_cntrl_st2;
368
369 DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n",
370 port_name(port), pipe_name(pipe));
371
372 if (WARN_ON(port == PORT_A))
373 return;
374
375 if (HAS_PCH_IBX(dev_priv->dev)) {
376 aud_config = IBX_AUD_CFG(pipe);
377 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
378 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
379 aud_config = VLV_AUD_CFG(pipe);
380 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
381 } else {
382 aud_config = CPT_AUD_CFG(pipe);
383 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
384 }
385
386 /* Disable timestamps */
387 tmp = I915_READ(aud_config);
388 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
389 tmp |= AUD_CONFIG_N_PROG_ENABLE;
390 tmp &= ~AUD_CONFIG_UPPER_N_MASK;
391 tmp &= ~AUD_CONFIG_LOWER_N_MASK;
392 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
393 tmp |= AUD_CONFIG_N_VALUE_INDEX;
394 I915_WRITE(aud_config, tmp);
395
396 eldv = IBX_ELD_VALID(port);
397
398 /* Invalidate ELD */
399 tmp = I915_READ(aud_cntrl_st2);
400 tmp &= ~eldv;
401 I915_WRITE(aud_cntrl_st2, tmp);
402}
403
404static void ilk_audio_codec_enable(struct drm_connector *connector,
405 struct intel_encoder *encoder,
406 const struct drm_display_mode *adjusted_mode)
407{
408 struct drm_i915_private *dev_priv = connector->dev->dev_private;
409 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
410 struct intel_digital_port *intel_dig_port =
411 enc_to_dig_port(&encoder->base);
412 enum port port = intel_dig_port->port;
413 enum pipe pipe = intel_crtc->pipe;
414 uint8_t *eld = connector->eld;
415 uint32_t eldv;
416 uint32_t tmp;
417 int len, i;
418 i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
419
420 DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n",
421 port_name(port), pipe_name(pipe), drm_eld_size(eld));
422
423 if (WARN_ON(port == PORT_A))
424 return;
425
426 /*
427 * FIXME: We're supposed to wait for vblank here, but we have vblanks
428 * disabled during the mode set. The proper fix would be to push the
429 * rest of the setup into a vblank work item, queued here, but the
430 * infrastructure is not there yet.
431 */
432
433 if (HAS_PCH_IBX(connector->dev)) {
434 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
435 aud_config = IBX_AUD_CFG(pipe);
436 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
437 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
438 } else if (IS_VALLEYVIEW(connector->dev) ||
439 IS_CHERRYVIEW(connector->dev)) {
440 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
441 aud_config = VLV_AUD_CFG(pipe);
442 aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
443 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
444 } else {
445 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
446 aud_config = CPT_AUD_CFG(pipe);
447 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
448 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
449 }
450
451 eldv = IBX_ELD_VALID(port);
452
453 /* Invalidate ELD */
454 tmp = I915_READ(aud_cntrl_st2);
455 tmp &= ~eldv;
456 I915_WRITE(aud_cntrl_st2, tmp);
457
458 /* Reset ELD write address */
459 tmp = I915_READ(aud_cntl_st);
460 tmp &= ~IBX_ELD_ADDRESS_MASK;
461 I915_WRITE(aud_cntl_st, tmp);
462
463 /* Up to 84 bytes of hw ELD buffer */
464 len = min(drm_eld_size(eld), 84);
465 for (i = 0; i < len / 4; i++)
466 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
467
468 /* ELD valid */
469 tmp = I915_READ(aud_cntrl_st2);
470 tmp |= eldv;
471 I915_WRITE(aud_cntrl_st2, tmp);
472
473 /* Enable timestamps */
474 tmp = I915_READ(aud_config);
475 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
476 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
477 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
478 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT))
479 tmp |= AUD_CONFIG_N_VALUE_INDEX;
480 else
481 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode);
482 I915_WRITE(aud_config, tmp);
483}
484
485/**
486 * intel_audio_codec_enable - Enable the audio codec for HD audio
487 * @intel_encoder: encoder on which to enable audio
488 *
489 * The enable sequences may only be performed after enabling the transcoder and
490 * port, and after completed link training.
491 */
492void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
493{
494 struct drm_encoder *encoder = &intel_encoder->base;
495 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc);
496 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
497 struct drm_connector *connector;
498 struct drm_device *dev = encoder->dev;
499 struct drm_i915_private *dev_priv = dev->dev_private;
500 struct i915_audio_component *acomp = dev_priv->audio_component;
501 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
502 enum port port = intel_dig_port->port;
503
504 connector = drm_select_eld(encoder);
505 if (!connector)
506 return;
507
508 DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
509 connector->base.id,
510 connector->name,
511 connector->encoder->base.id,
512 connector->encoder->name);
513
514 /* ELD Conn_Type */
515 connector->eld[5] &= ~(3 << 2);
516 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
517 connector->eld[5] |= (1 << 2);
518
519 connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
520
521 if (dev_priv->display.audio_codec_enable)
522 dev_priv->display.audio_codec_enable(connector, intel_encoder,
523 adjusted_mode);
524
525 mutex_lock(&dev_priv->av_mutex);
526 intel_dig_port->audio_connector = connector;
527 /* referred in audio callbacks */
528 dev_priv->dig_port_map[port] = intel_encoder;
529 mutex_unlock(&dev_priv->av_mutex);
530
531 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
532 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port);
533}
534
535/**
536 * intel_audio_codec_disable - Disable the audio codec for HD audio
537 * @intel_encoder: encoder on which to disable audio
538 *
539 * The disable sequences must be performed before disabling the transcoder or
540 * port.
541 */
542void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
543{
544 struct drm_encoder *encoder = &intel_encoder->base;
545 struct drm_device *dev = encoder->dev;
546 struct drm_i915_private *dev_priv = dev->dev_private;
547 struct i915_audio_component *acomp = dev_priv->audio_component;
548 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
549 enum port port = intel_dig_port->port;
550
551 if (dev_priv->display.audio_codec_disable)
552 dev_priv->display.audio_codec_disable(intel_encoder);
553
554 mutex_lock(&dev_priv->av_mutex);
555 intel_dig_port->audio_connector = NULL;
556 dev_priv->dig_port_map[port] = NULL;
557 mutex_unlock(&dev_priv->av_mutex);
558
559 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
560 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port);
561}
562
563/**
564 * intel_init_audio - Set up chip specific audio functions
565 * @dev: drm device
566 */
567void intel_init_audio(struct drm_device *dev)
568{
569 struct drm_i915_private *dev_priv = dev->dev_private;
570
571 if (IS_G4X(dev)) {
572 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable;
573 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable;
574 } else if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
575 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
576 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
577 } else if (IS_HASWELL(dev) || INTEL_INFO(dev)->gen >= 8) {
578 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable;
579 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable;
580 } else if (HAS_PCH_SPLIT(dev)) {
581 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
582 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
583 }
584}
585
586static void i915_audio_component_get_power(struct device *dev)
587{
588 intel_display_power_get(dev_to_i915(dev), POWER_DOMAIN_AUDIO);
589}
590
591static void i915_audio_component_put_power(struct device *dev)
592{
593 intel_display_power_put(dev_to_i915(dev), POWER_DOMAIN_AUDIO);
594}
595
596static void i915_audio_component_codec_wake_override(struct device *dev,
597 bool enable)
598{
599 struct drm_i915_private *dev_priv = dev_to_i915(dev);
600 u32 tmp;
601
602 if (!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv))
603 return;
604
605 /*
606 * Enable/disable generating the codec wake signal, overriding the
607 * internal logic to generate the codec wake to controller.
608 */
609 tmp = I915_READ(HSW_AUD_CHICKENBIT);
610 tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL;
611 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
612 usleep_range(1000, 1500);
613
614 if (enable) {
615 tmp = I915_READ(HSW_AUD_CHICKENBIT);
616 tmp |= SKL_AUD_CODEC_WAKE_SIGNAL;
617 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
618 usleep_range(1000, 1500);
619 }
620}
621
622/* Get CDCLK in kHz */
623static int i915_audio_component_get_cdclk_freq(struct device *dev)
624{
625 struct drm_i915_private *dev_priv = dev_to_i915(dev);
626 int ret;
627
628 if (WARN_ON_ONCE(!HAS_DDI(dev_priv)))
629 return -ENODEV;
630
631 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
632 ret = dev_priv->display.get_display_clock_speed(dev_priv->dev);
633
634 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
635
636 return ret;
637}
638
639static int i915_audio_component_sync_audio_rate(struct device *dev,
640 int port, int rate)
641{
642 struct drm_i915_private *dev_priv = dev_to_i915(dev);
643 struct intel_encoder *intel_encoder;
644 struct intel_crtc *crtc;
645 struct drm_display_mode *mode;
646 struct i915_audio_component *acomp = dev_priv->audio_component;
647 enum pipe pipe = INVALID_PIPE;
648 u32 tmp;
649 int n;
650 int err = 0;
651
652 /* HSW, BDW, SKL, KBL need this fix */
653 if (!IS_SKYLAKE(dev_priv) &&
654 !IS_KABYLAKE(dev_priv) &&
655 !IS_BROADWELL(dev_priv) &&
656 !IS_HASWELL(dev_priv))
657 return 0;
658
659 mutex_lock(&dev_priv->av_mutex);
660 /* 1. get the pipe */
661 intel_encoder = dev_priv->dig_port_map[port];
662 /* intel_encoder might be NULL for DP MST */
663 if (!intel_encoder || !intel_encoder->base.crtc ||
664 intel_encoder->type != INTEL_OUTPUT_HDMI) {
665 DRM_DEBUG_KMS("no valid port %c\n", port_name(port));
666 err = -ENODEV;
667 goto unlock;
668 }
669 crtc = to_intel_crtc(intel_encoder->base.crtc);
670 pipe = crtc->pipe;
671 if (pipe == INVALID_PIPE) {
672 DRM_DEBUG_KMS("no pipe for the port %c\n", port_name(port));
673 err = -ENODEV;
674 goto unlock;
675 }
676
677 DRM_DEBUG_KMS("pipe %c connects port %c\n",
678 pipe_name(pipe), port_name(port));
679 mode = &crtc->config->base.adjusted_mode;
680
681 /* port must be valid now, otherwise the pipe will be invalid */
682 acomp->aud_sample_rate[port] = rate;
683
684 /* 2. check whether to set the N/CTS/M manually or not */
685 if (!audio_rate_need_prog(crtc, mode)) {
686 tmp = I915_READ(HSW_AUD_CFG(pipe));
687 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
688 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
689 goto unlock;
690 }
691
692 n = audio_config_get_n(mode, rate);
693 if (n == 0) {
694 DRM_DEBUG_KMS("Using automatic mode for N value on port %c\n",
695 port_name(port));
696 tmp = I915_READ(HSW_AUD_CFG(pipe));
697 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
698 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
699 goto unlock;
700 }
701
702 /* 3. set the N/CTS/M */
703 tmp = I915_READ(HSW_AUD_CFG(pipe));
704 tmp = audio_config_setup_n_reg(n, tmp);
705 I915_WRITE(HSW_AUD_CFG(pipe), tmp);
706
707 unlock:
708 mutex_unlock(&dev_priv->av_mutex);
709 return err;
710}
711
712static int i915_audio_component_get_eld(struct device *dev, int port,
713 bool *enabled,
714 unsigned char *buf, int max_bytes)
715{
716 struct drm_i915_private *dev_priv = dev_to_i915(dev);
717 struct intel_encoder *intel_encoder;
718 struct intel_digital_port *intel_dig_port;
719 const u8 *eld;
720 int ret = -EINVAL;
721
722 mutex_lock(&dev_priv->av_mutex);
723 intel_encoder = dev_priv->dig_port_map[port];
724 /* intel_encoder might be NULL for DP MST */
725 if (intel_encoder) {
726 ret = 0;
727 intel_dig_port = enc_to_dig_port(&intel_encoder->base);
728 *enabled = intel_dig_port->audio_connector != NULL;
729 if (*enabled) {
730 eld = intel_dig_port->audio_connector->eld;
731 ret = drm_eld_size(eld);
732 memcpy(buf, eld, min(max_bytes, ret));
733 }
734 }
735
736 mutex_unlock(&dev_priv->av_mutex);
737 return ret;
738}
739
740static const struct i915_audio_component_ops i915_audio_component_ops = {
741 .owner = THIS_MODULE,
742 .get_power = i915_audio_component_get_power,
743 .put_power = i915_audio_component_put_power,
744 .codec_wake_override = i915_audio_component_codec_wake_override,
745 .get_cdclk_freq = i915_audio_component_get_cdclk_freq,
746 .sync_audio_rate = i915_audio_component_sync_audio_rate,
747 .get_eld = i915_audio_component_get_eld,
748};
749
750static int i915_audio_component_bind(struct device *i915_dev,
751 struct device *hda_dev, void *data)
752{
753 struct i915_audio_component *acomp = data;
754 struct drm_i915_private *dev_priv = dev_to_i915(i915_dev);
755 int i;
756
757 if (WARN_ON(acomp->ops || acomp->dev))
758 return -EEXIST;
759
760 drm_modeset_lock_all(dev_priv->dev);
761 acomp->ops = &i915_audio_component_ops;
762 acomp->dev = i915_dev;
763 BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
764 for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
765 acomp->aud_sample_rate[i] = 0;
766 dev_priv->audio_component = acomp;
767 drm_modeset_unlock_all(dev_priv->dev);
768
769 return 0;
770}
771
772static void i915_audio_component_unbind(struct device *i915_dev,
773 struct device *hda_dev, void *data)
774{
775 struct i915_audio_component *acomp = data;
776 struct drm_i915_private *dev_priv = dev_to_i915(i915_dev);
777
778 drm_modeset_lock_all(dev_priv->dev);
779 acomp->ops = NULL;
780 acomp->dev = NULL;
781 dev_priv->audio_component = NULL;
782 drm_modeset_unlock_all(dev_priv->dev);
783}
784
785static const struct component_ops i915_audio_component_bind_ops = {
786 .bind = i915_audio_component_bind,
787 .unbind = i915_audio_component_unbind,
788};
789
790/**
791 * i915_audio_component_init - initialize and register the audio component
792 * @dev_priv: i915 device instance
793 *
794 * This will register with the component framework a child component which
795 * will bind dynamically to the snd_hda_intel driver's corresponding master
796 * component when the latter is registered. During binding the child
797 * initializes an instance of struct i915_audio_component which it receives
798 * from the master. The master can then start to use the interface defined by
799 * this struct. Each side can break the binding at any point by deregistering
800 * its own component after which each side's component unbind callback is
801 * called.
802 *
803 * We ignore any error during registration and continue with reduced
804 * functionality (i.e. without HDMI audio).
805 */
806void i915_audio_component_init(struct drm_i915_private *dev_priv)
807{
808 int ret;
809
810 ret = component_add(dev_priv->dev->dev, &i915_audio_component_bind_ops);
811 if (ret < 0) {
812 DRM_ERROR("failed to add audio component (%d)\n", ret);
813 /* continue with reduced functionality */
814 return;
815 }
816
817 dev_priv->audio_component_registered = true;
818}
819
820/**
821 * i915_audio_component_cleanup - deregister the audio component
822 * @dev_priv: i915 device instance
823 *
824 * Deregisters the audio component, breaking any existing binding to the
825 * corresponding snd_hda_intel driver's master component.
826 */
827void i915_audio_component_cleanup(struct drm_i915_private *dev_priv)
828{
829 if (!dev_priv->audio_component_registered)
830 return;
831
832 component_del(dev_priv->dev->dev, &i915_audio_component_bind_ops);
833 dev_priv->audio_component_registered = false;
834}