]> Git Repo - linux.git/blob - drivers/gpu/drm/i915/intel_audio.c
Merge tag 'drm-intel-next-2019-05-24' of git://anongit.freedesktop.org/drm/drm-intel...
[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/component.h>
25 #include <linux/kernel.h>
26
27 #include <drm/drm_edid.h>
28 #include <drm/i915_component.h>
29
30 #include "i915_drv.h"
31 #include "intel_audio.h"
32 #include "intel_drv.h"
33 #include "intel_lpe_audio.h"
34
35 /**
36  * DOC: High Definition Audio over HDMI and Display Port
37  *
38  * The graphics and audio drivers together support High Definition Audio over
39  * HDMI and Display Port. The audio programming sequences are divided into audio
40  * codec and controller enable and disable sequences. The graphics driver
41  * handles the audio codec sequences, while the audio driver handles the audio
42  * controller sequences.
43  *
44  * The disable sequences must be performed before disabling the transcoder or
45  * port. The enable sequences may only be performed after enabling the
46  * transcoder and port, and after completed link training. Therefore the audio
47  * enable/disable sequences are part of the modeset sequence.
48  *
49  * The codec and controller sequences could be done either parallel or serial,
50  * but generally the ELDV/PD change in the codec sequence indicates to the audio
51  * driver that the controller sequence should start. Indeed, most of the
52  * co-operation between the graphics and audio drivers is handled via audio
53  * related registers. (The notable exception is the power management, not
54  * covered here.)
55  *
56  * The struct &i915_audio_component is used to interact between the graphics
57  * and audio drivers. The struct &i915_audio_component_ops @ops in it is
58  * defined in graphics driver and called in audio driver. The
59  * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
60  */
61
62 /* DP N/M table */
63 #define LC_810M 810000
64 #define LC_540M 540000
65 #define LC_270M 270000
66 #define LC_162M 162000
67
68 struct dp_aud_n_m {
69         int sample_rate;
70         int clock;
71         u16 m;
72         u16 n;
73 };
74
75 /* Values according to DP 1.4 Table 2-104 */
76 static const struct dp_aud_n_m dp_aud_n_m[] = {
77         { 32000, LC_162M, 1024, 10125 },
78         { 44100, LC_162M, 784, 5625 },
79         { 48000, LC_162M, 512, 3375 },
80         { 64000, LC_162M, 2048, 10125 },
81         { 88200, LC_162M, 1568, 5625 },
82         { 96000, LC_162M, 1024, 3375 },
83         { 128000, LC_162M, 4096, 10125 },
84         { 176400, LC_162M, 3136, 5625 },
85         { 192000, LC_162M, 2048, 3375 },
86         { 32000, LC_270M, 1024, 16875 },
87         { 44100, LC_270M, 784, 9375 },
88         { 48000, LC_270M, 512, 5625 },
89         { 64000, LC_270M, 2048, 16875 },
90         { 88200, LC_270M, 1568, 9375 },
91         { 96000, LC_270M, 1024, 5625 },
92         { 128000, LC_270M, 4096, 16875 },
93         { 176400, LC_270M, 3136, 9375 },
94         { 192000, LC_270M, 2048, 5625 },
95         { 32000, LC_540M, 1024, 33750 },
96         { 44100, LC_540M, 784, 18750 },
97         { 48000, LC_540M, 512, 11250 },
98         { 64000, LC_540M, 2048, 33750 },
99         { 88200, LC_540M, 1568, 18750 },
100         { 96000, LC_540M, 1024, 11250 },
101         { 128000, LC_540M, 4096, 33750 },
102         { 176400, LC_540M, 3136, 18750 },
103         { 192000, LC_540M, 2048, 11250 },
104         { 32000, LC_810M, 1024, 50625 },
105         { 44100, LC_810M, 784, 28125 },
106         { 48000, LC_810M, 512, 16875 },
107         { 64000, LC_810M, 2048, 50625 },
108         { 88200, LC_810M, 1568, 28125 },
109         { 96000, LC_810M, 1024, 16875 },
110         { 128000, LC_810M, 4096, 50625 },
111         { 176400, LC_810M, 3136, 28125 },
112         { 192000, LC_810M, 2048, 16875 },
113 };
114
115 static const struct dp_aud_n_m *
116 audio_config_dp_get_n_m(const struct intel_crtc_state *crtc_state, int rate)
117 {
118         int i;
119
120         for (i = 0; i < ARRAY_SIZE(dp_aud_n_m); i++) {
121                 if (rate == dp_aud_n_m[i].sample_rate &&
122                     crtc_state->port_clock == dp_aud_n_m[i].clock)
123                         return &dp_aud_n_m[i];
124         }
125
126         return NULL;
127 }
128
129 static const struct {
130         int clock;
131         u32 config;
132 } hdmi_audio_clock[] = {
133         { 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
134         { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
135         { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
136         { 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
137         { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
138         { 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
139         { 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
140         { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
141         { 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
142         { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
143 };
144
145 /* HDMI N/CTS table */
146 #define TMDS_297M 297000
147 #define TMDS_296M 296703
148 #define TMDS_594M 594000
149 #define TMDS_593M 593407
150
151 static const struct {
152         int sample_rate;
153         int clock;
154         int n;
155         int cts;
156 } hdmi_aud_ncts[] = {
157         { 32000, TMDS_296M, 5824, 421875 },
158         { 32000, TMDS_297M, 3072, 222750 },
159         { 32000, TMDS_593M, 5824, 843750 },
160         { 32000, TMDS_594M, 3072, 445500 },
161         { 44100, TMDS_296M, 4459, 234375 },
162         { 44100, TMDS_297M, 4704, 247500 },
163         { 44100, TMDS_593M, 8918, 937500 },
164         { 44100, TMDS_594M, 9408, 990000 },
165         { 88200, TMDS_296M, 8918, 234375 },
166         { 88200, TMDS_297M, 9408, 247500 },
167         { 88200, TMDS_593M, 17836, 937500 },
168         { 88200, TMDS_594M, 18816, 990000 },
169         { 176400, TMDS_296M, 17836, 234375 },
170         { 176400, TMDS_297M, 18816, 247500 },
171         { 176400, TMDS_593M, 35672, 937500 },
172         { 176400, TMDS_594M, 37632, 990000 },
173         { 48000, TMDS_296M, 5824, 281250 },
174         { 48000, TMDS_297M, 5120, 247500 },
175         { 48000, TMDS_593M, 5824, 562500 },
176         { 48000, TMDS_594M, 6144, 594000 },
177         { 96000, TMDS_296M, 11648, 281250 },
178         { 96000, TMDS_297M, 10240, 247500 },
179         { 96000, TMDS_593M, 11648, 562500 },
180         { 96000, TMDS_594M, 12288, 594000 },
181         { 192000, TMDS_296M, 23296, 281250 },
182         { 192000, TMDS_297M, 20480, 247500 },
183         { 192000, TMDS_593M, 23296, 562500 },
184         { 192000, TMDS_594M, 24576, 594000 },
185 };
186
187 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
188 static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_state)
189 {
190         const struct drm_display_mode *adjusted_mode =
191                 &crtc_state->base.adjusted_mode;
192         int i;
193
194         for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) {
195                 if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock)
196                         break;
197         }
198
199         if (i == ARRAY_SIZE(hdmi_audio_clock)) {
200                 DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
201                               adjusted_mode->crtc_clock);
202                 i = 1;
203         }
204
205         DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n",
206                       hdmi_audio_clock[i].clock,
207                       hdmi_audio_clock[i].config);
208
209         return hdmi_audio_clock[i].config;
210 }
211
212 static int audio_config_hdmi_get_n(const struct intel_crtc_state *crtc_state,
213                                    int rate)
214 {
215         const struct drm_display_mode *adjusted_mode =
216                 &crtc_state->base.adjusted_mode;
217         int i;
218
219         for (i = 0; i < ARRAY_SIZE(hdmi_aud_ncts); i++) {
220                 if (rate == hdmi_aud_ncts[i].sample_rate &&
221                     adjusted_mode->crtc_clock == hdmi_aud_ncts[i].clock) {
222                         return hdmi_aud_ncts[i].n;
223                 }
224         }
225         return 0;
226 }
227
228 static bool intel_eld_uptodate(struct drm_connector *connector,
229                                i915_reg_t reg_eldv, u32 bits_eldv,
230                                i915_reg_t reg_elda, u32 bits_elda,
231                                i915_reg_t reg_edid)
232 {
233         struct drm_i915_private *dev_priv = to_i915(connector->dev);
234         const u8 *eld = connector->eld;
235         u32 tmp;
236         int i;
237
238         tmp = I915_READ(reg_eldv);
239         tmp &= bits_eldv;
240
241         if (!tmp)
242                 return false;
243
244         tmp = I915_READ(reg_elda);
245         tmp &= ~bits_elda;
246         I915_WRITE(reg_elda, tmp);
247
248         for (i = 0; i < drm_eld_size(eld) / 4; i++)
249                 if (I915_READ(reg_edid) != *((const u32 *)eld + i))
250                         return false;
251
252         return true;
253 }
254
255 static void g4x_audio_codec_disable(struct intel_encoder *encoder,
256                                     const struct intel_crtc_state *old_crtc_state,
257                                     const struct drm_connector_state *old_conn_state)
258 {
259         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
260         u32 eldv, tmp;
261
262         DRM_DEBUG_KMS("Disable audio codec\n");
263
264         tmp = I915_READ(G4X_AUD_VID_DID);
265         if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
266                 eldv = G4X_ELDV_DEVCL_DEVBLC;
267         else
268                 eldv = G4X_ELDV_DEVCTG;
269
270         /* Invalidate ELD */
271         tmp = I915_READ(G4X_AUD_CNTL_ST);
272         tmp &= ~eldv;
273         I915_WRITE(G4X_AUD_CNTL_ST, tmp);
274 }
275
276 static void g4x_audio_codec_enable(struct intel_encoder *encoder,
277                                    const struct intel_crtc_state *crtc_state,
278                                    const struct drm_connector_state *conn_state)
279 {
280         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
281         struct drm_connector *connector = conn_state->connector;
282         const u8 *eld = connector->eld;
283         u32 eldv;
284         u32 tmp;
285         int len, i;
286
287         DRM_DEBUG_KMS("Enable audio codec, %u bytes ELD\n", drm_eld_size(eld));
288
289         tmp = I915_READ(G4X_AUD_VID_DID);
290         if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL)
291                 eldv = G4X_ELDV_DEVCL_DEVBLC;
292         else
293                 eldv = G4X_ELDV_DEVCTG;
294
295         if (intel_eld_uptodate(connector,
296                                G4X_AUD_CNTL_ST, eldv,
297                                G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK,
298                                G4X_HDMIW_HDMIEDID))
299                 return;
300
301         tmp = I915_READ(G4X_AUD_CNTL_ST);
302         tmp &= ~(eldv | G4X_ELD_ADDR_MASK);
303         len = (tmp >> 9) & 0x1f;                /* ELD buffer size */
304         I915_WRITE(G4X_AUD_CNTL_ST, tmp);
305
306         len = min(drm_eld_size(eld) / 4, len);
307         DRM_DEBUG_DRIVER("ELD size %d\n", len);
308         for (i = 0; i < len; i++)
309                 I915_WRITE(G4X_HDMIW_HDMIEDID, *((const u32 *)eld + i));
310
311         tmp = I915_READ(G4X_AUD_CNTL_ST);
312         tmp |= eldv;
313         I915_WRITE(G4X_AUD_CNTL_ST, tmp);
314 }
315
316 static void
317 hsw_dp_audio_config_update(struct intel_encoder *encoder,
318                            const struct intel_crtc_state *crtc_state)
319 {
320         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
321         struct i915_audio_component *acomp = dev_priv->audio_component;
322         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
323         enum port port = encoder->port;
324         const struct dp_aud_n_m *nm;
325         int rate;
326         u32 tmp;
327
328         rate = acomp ? acomp->aud_sample_rate[port] : 0;
329         nm = audio_config_dp_get_n_m(crtc_state, rate);
330         if (nm)
331                 DRM_DEBUG_KMS("using Maud %u, Naud %u\n", nm->m, nm->n);
332         else
333                 DRM_DEBUG_KMS("using automatic Maud, Naud\n");
334
335         tmp = I915_READ(HSW_AUD_CFG(cpu_transcoder));
336         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
337         tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
338         tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
339         tmp |= AUD_CONFIG_N_VALUE_INDEX;
340
341         if (nm) {
342                 tmp &= ~AUD_CONFIG_N_MASK;
343                 tmp |= AUD_CONFIG_N(nm->n);
344                 tmp |= AUD_CONFIG_N_PROG_ENABLE;
345         }
346
347         I915_WRITE(HSW_AUD_CFG(cpu_transcoder), tmp);
348
349         tmp = I915_READ(HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
350         tmp &= ~AUD_CONFIG_M_MASK;
351         tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
352         tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
353
354         if (nm) {
355                 tmp |= nm->m;
356                 tmp |= AUD_M_CTS_M_VALUE_INDEX;
357                 tmp |= AUD_M_CTS_M_PROG_ENABLE;
358         }
359
360         I915_WRITE(HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
361 }
362
363 static void
364 hsw_hdmi_audio_config_update(struct intel_encoder *encoder,
365                              const struct intel_crtc_state *crtc_state)
366 {
367         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
368         struct i915_audio_component *acomp = dev_priv->audio_component;
369         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
370         enum port port = encoder->port;
371         int n, rate;
372         u32 tmp;
373
374         rate = acomp ? acomp->aud_sample_rate[port] : 0;
375
376         tmp = I915_READ(HSW_AUD_CFG(cpu_transcoder));
377         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
378         tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
379         tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
380         tmp |= audio_config_hdmi_pixel_clock(crtc_state);
381
382         n = audio_config_hdmi_get_n(crtc_state, rate);
383         if (n != 0) {
384                 DRM_DEBUG_KMS("using N %d\n", n);
385
386                 tmp &= ~AUD_CONFIG_N_MASK;
387                 tmp |= AUD_CONFIG_N(n);
388                 tmp |= AUD_CONFIG_N_PROG_ENABLE;
389         } else {
390                 DRM_DEBUG_KMS("using automatic N\n");
391         }
392
393         I915_WRITE(HSW_AUD_CFG(cpu_transcoder), tmp);
394
395         /*
396          * Let's disable "Enable CTS or M Prog bit"
397          * and let HW calculate the value
398          */
399         tmp = I915_READ(HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
400         tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
401         tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
402         I915_WRITE(HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
403 }
404
405 static void
406 hsw_audio_config_update(struct intel_encoder *encoder,
407                         const struct intel_crtc_state *crtc_state)
408 {
409         if (intel_crtc_has_dp_encoder(crtc_state))
410                 hsw_dp_audio_config_update(encoder, crtc_state);
411         else
412                 hsw_hdmi_audio_config_update(encoder, crtc_state);
413 }
414
415 static void hsw_audio_codec_disable(struct intel_encoder *encoder,
416                                     const struct intel_crtc_state *old_crtc_state,
417                                     const struct drm_connector_state *old_conn_state)
418 {
419         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
420         enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
421         u32 tmp;
422
423         DRM_DEBUG_KMS("Disable audio codec on transcoder %s\n",
424                       transcoder_name(cpu_transcoder));
425
426         mutex_lock(&dev_priv->av_mutex);
427
428         /* Disable timestamps */
429         tmp = I915_READ(HSW_AUD_CFG(cpu_transcoder));
430         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
431         tmp |= AUD_CONFIG_N_PROG_ENABLE;
432         tmp &= ~AUD_CONFIG_UPPER_N_MASK;
433         tmp &= ~AUD_CONFIG_LOWER_N_MASK;
434         if (intel_crtc_has_dp_encoder(old_crtc_state))
435                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
436         I915_WRITE(HSW_AUD_CFG(cpu_transcoder), tmp);
437
438         /* Invalidate ELD */
439         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
440         tmp &= ~AUDIO_ELD_VALID(cpu_transcoder);
441         tmp &= ~AUDIO_OUTPUT_ENABLE(cpu_transcoder);
442         I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
443
444         mutex_unlock(&dev_priv->av_mutex);
445 }
446
447 static void hsw_audio_codec_enable(struct intel_encoder *encoder,
448                                    const struct intel_crtc_state *crtc_state,
449                                    const struct drm_connector_state *conn_state)
450 {
451         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
452         struct drm_connector *connector = conn_state->connector;
453         enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
454         const u8 *eld = connector->eld;
455         u32 tmp;
456         int len, i;
457
458         DRM_DEBUG_KMS("Enable audio codec on transcoder %s, %u bytes ELD\n",
459                       transcoder_name(cpu_transcoder), drm_eld_size(eld));
460
461         mutex_lock(&dev_priv->av_mutex);
462
463         /* Enable audio presence detect, invalidate ELD */
464         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
465         tmp |= AUDIO_OUTPUT_ENABLE(cpu_transcoder);
466         tmp &= ~AUDIO_ELD_VALID(cpu_transcoder);
467         I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
468
469         /*
470          * FIXME: We're supposed to wait for vblank here, but we have vblanks
471          * disabled during the mode set. The proper fix would be to push the
472          * rest of the setup into a vblank work item, queued here, but the
473          * infrastructure is not there yet.
474          */
475
476         /* Reset ELD write address */
477         tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(cpu_transcoder));
478         tmp &= ~IBX_ELD_ADDRESS_MASK;
479         I915_WRITE(HSW_AUD_DIP_ELD_CTRL(cpu_transcoder), tmp);
480
481         /* Up to 84 bytes of hw ELD buffer */
482         len = min(drm_eld_size(eld), 84);
483         for (i = 0; i < len / 4; i++)
484                 I915_WRITE(HSW_AUD_EDID_DATA(cpu_transcoder), *((const u32 *)eld + i));
485
486         /* ELD valid */
487         tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
488         tmp |= AUDIO_ELD_VALID(cpu_transcoder);
489         I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
490
491         /* Enable timestamps */
492         hsw_audio_config_update(encoder, crtc_state);
493
494         mutex_unlock(&dev_priv->av_mutex);
495 }
496
497 static void ilk_audio_codec_disable(struct intel_encoder *encoder,
498                                     const struct intel_crtc_state *old_crtc_state,
499                                     const struct drm_connector_state *old_conn_state)
500 {
501         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
502         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
503         enum pipe pipe = crtc->pipe;
504         enum port port = encoder->port;
505         u32 tmp, eldv;
506         i915_reg_t aud_config, aud_cntrl_st2;
507
508         DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n",
509                       port_name(port), pipe_name(pipe));
510
511         if (WARN_ON(port == PORT_A))
512                 return;
513
514         if (HAS_PCH_IBX(dev_priv)) {
515                 aud_config = IBX_AUD_CFG(pipe);
516                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
517         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
518                 aud_config = VLV_AUD_CFG(pipe);
519                 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
520         } else {
521                 aud_config = CPT_AUD_CFG(pipe);
522                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
523         }
524
525         /* Disable timestamps */
526         tmp = I915_READ(aud_config);
527         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
528         tmp |= AUD_CONFIG_N_PROG_ENABLE;
529         tmp &= ~AUD_CONFIG_UPPER_N_MASK;
530         tmp &= ~AUD_CONFIG_LOWER_N_MASK;
531         if (intel_crtc_has_dp_encoder(old_crtc_state))
532                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
533         I915_WRITE(aud_config, tmp);
534
535         eldv = IBX_ELD_VALID(port);
536
537         /* Invalidate ELD */
538         tmp = I915_READ(aud_cntrl_st2);
539         tmp &= ~eldv;
540         I915_WRITE(aud_cntrl_st2, tmp);
541 }
542
543 static void ilk_audio_codec_enable(struct intel_encoder *encoder,
544                                    const struct intel_crtc_state *crtc_state,
545                                    const struct drm_connector_state *conn_state)
546 {
547         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
548         struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
549         struct drm_connector *connector = conn_state->connector;
550         enum pipe pipe = crtc->pipe;
551         enum port port = encoder->port;
552         const u8 *eld = connector->eld;
553         u32 tmp, eldv;
554         int len, i;
555         i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
556
557         DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n",
558                       port_name(port), pipe_name(pipe), drm_eld_size(eld));
559
560         if (WARN_ON(port == PORT_A))
561                 return;
562
563         /*
564          * FIXME: We're supposed to wait for vblank here, but we have vblanks
565          * disabled during the mode set. The proper fix would be to push the
566          * rest of the setup into a vblank work item, queued here, but the
567          * infrastructure is not there yet.
568          */
569
570         if (HAS_PCH_IBX(dev_priv)) {
571                 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
572                 aud_config = IBX_AUD_CFG(pipe);
573                 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
574                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
575         } else if (IS_VALLEYVIEW(dev_priv) ||
576                    IS_CHERRYVIEW(dev_priv)) {
577                 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
578                 aud_config = VLV_AUD_CFG(pipe);
579                 aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
580                 aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
581         } else {
582                 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
583                 aud_config = CPT_AUD_CFG(pipe);
584                 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
585                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
586         }
587
588         eldv = IBX_ELD_VALID(port);
589
590         /* Invalidate ELD */
591         tmp = I915_READ(aud_cntrl_st2);
592         tmp &= ~eldv;
593         I915_WRITE(aud_cntrl_st2, tmp);
594
595         /* Reset ELD write address */
596         tmp = I915_READ(aud_cntl_st);
597         tmp &= ~IBX_ELD_ADDRESS_MASK;
598         I915_WRITE(aud_cntl_st, tmp);
599
600         /* Up to 84 bytes of hw ELD buffer */
601         len = min(drm_eld_size(eld), 84);
602         for (i = 0; i < len / 4; i++)
603                 I915_WRITE(hdmiw_hdmiedid, *((const u32 *)eld + i));
604
605         /* ELD valid */
606         tmp = I915_READ(aud_cntrl_st2);
607         tmp |= eldv;
608         I915_WRITE(aud_cntrl_st2, tmp);
609
610         /* Enable timestamps */
611         tmp = I915_READ(aud_config);
612         tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
613         tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
614         tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
615         if (intel_crtc_has_dp_encoder(crtc_state))
616                 tmp |= AUD_CONFIG_N_VALUE_INDEX;
617         else
618                 tmp |= audio_config_hdmi_pixel_clock(crtc_state);
619         I915_WRITE(aud_config, tmp);
620 }
621
622 /**
623  * intel_audio_codec_enable - Enable the audio codec for HD audio
624  * @encoder: encoder on which to enable audio
625  * @crtc_state: pointer to the current crtc state.
626  * @conn_state: pointer to the current connector state.
627  *
628  * The enable sequences may only be performed after enabling the transcoder and
629  * port, and after completed link training.
630  */
631 void intel_audio_codec_enable(struct intel_encoder *encoder,
632                               const struct intel_crtc_state *crtc_state,
633                               const struct drm_connector_state *conn_state)
634 {
635         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
636         struct i915_audio_component *acomp = dev_priv->audio_component;
637         struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
638         struct drm_connector *connector = conn_state->connector;
639         const struct drm_display_mode *adjusted_mode =
640                 &crtc_state->base.adjusted_mode;
641         enum port port = encoder->port;
642         enum pipe pipe = crtc->pipe;
643
644         /* FIXME precompute the ELD in .compute_config() */
645         if (!connector->eld[0])
646                 DRM_DEBUG_KMS("Bogus ELD on [CONNECTOR:%d:%s]\n",
647                               connector->base.id, connector->name);
648
649         DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
650                          connector->base.id,
651                          connector->name,
652                          connector->encoder->base.id,
653                          connector->encoder->name);
654
655         connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
656
657         if (dev_priv->display.audio_codec_enable)
658                 dev_priv->display.audio_codec_enable(encoder,
659                                                      crtc_state,
660                                                      conn_state);
661
662         mutex_lock(&dev_priv->av_mutex);
663         encoder->audio_connector = connector;
664
665         /* referred in audio callbacks */
666         dev_priv->av_enc_map[pipe] = encoder;
667         mutex_unlock(&dev_priv->av_mutex);
668
669         if (acomp && acomp->base.audio_ops &&
670             acomp->base.audio_ops->pin_eld_notify) {
671                 /* audio drivers expect pipe = -1 to indicate Non-MST cases */
672                 if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST))
673                         pipe = -1;
674                 acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
675                                                  (int) port, (int) pipe);
676         }
677
678         intel_lpe_audio_notify(dev_priv, pipe, port, connector->eld,
679                                crtc_state->port_clock,
680                                intel_crtc_has_dp_encoder(crtc_state));
681 }
682
683 /**
684  * intel_audio_codec_disable - Disable the audio codec for HD audio
685  * @encoder: encoder on which to disable audio
686  * @old_crtc_state: pointer to the old crtc state.
687  * @old_conn_state: pointer to the old connector state.
688  *
689  * The disable sequences must be performed before disabling the transcoder or
690  * port.
691  */
692 void intel_audio_codec_disable(struct intel_encoder *encoder,
693                                const struct intel_crtc_state *old_crtc_state,
694                                const struct drm_connector_state *old_conn_state)
695 {
696         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
697         struct i915_audio_component *acomp = dev_priv->audio_component;
698         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
699         enum port port = encoder->port;
700         enum pipe pipe = crtc->pipe;
701
702         if (dev_priv->display.audio_codec_disable)
703                 dev_priv->display.audio_codec_disable(encoder,
704                                                       old_crtc_state,
705                                                       old_conn_state);
706
707         mutex_lock(&dev_priv->av_mutex);
708         encoder->audio_connector = NULL;
709         dev_priv->av_enc_map[pipe] = NULL;
710         mutex_unlock(&dev_priv->av_mutex);
711
712         if (acomp && acomp->base.audio_ops &&
713             acomp->base.audio_ops->pin_eld_notify) {
714                 /* audio drivers expect pipe = -1 to indicate Non-MST cases */
715                 if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
716                         pipe = -1;
717                 acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
718                                                  (int) port, (int) pipe);
719         }
720
721         intel_lpe_audio_notify(dev_priv, pipe, port, NULL, 0, false);
722 }
723
724 /**
725  * intel_init_audio_hooks - Set up chip specific audio hooks
726  * @dev_priv: device private
727  */
728 void intel_init_audio_hooks(struct drm_i915_private *dev_priv)
729 {
730         if (IS_G4X(dev_priv)) {
731                 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable;
732                 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable;
733         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
734                 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
735                 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
736         } else if (IS_HASWELL(dev_priv) || INTEL_GEN(dev_priv) >= 8) {
737                 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable;
738                 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable;
739         } else if (HAS_PCH_SPLIT(dev_priv)) {
740                 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable;
741                 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable;
742         }
743 }
744
745 static void glk_force_audio_cdclk(struct drm_i915_private *dev_priv,
746                                   bool enable)
747 {
748         struct drm_modeset_acquire_ctx ctx;
749         struct drm_atomic_state *state;
750         int ret;
751
752         drm_modeset_acquire_init(&ctx, 0);
753         state = drm_atomic_state_alloc(&dev_priv->drm);
754         if (WARN_ON(!state))
755                 return;
756
757         state->acquire_ctx = &ctx;
758
759 retry:
760         to_intel_atomic_state(state)->cdclk.force_min_cdclk_changed = true;
761         to_intel_atomic_state(state)->cdclk.force_min_cdclk =
762                 enable ? 2 * 96000 : 0;
763
764         /*
765          * Protects dev_priv->cdclk.force_min_cdclk
766          * Need to lock this here in case we have no active pipes
767          * and thus wouldn't lock it during the commit otherwise.
768          */
769         ret = drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex,
770                                &ctx);
771         if (!ret)
772                 ret = drm_atomic_commit(state);
773
774         if (ret == -EDEADLK) {
775                 drm_atomic_state_clear(state);
776                 drm_modeset_backoff(&ctx);
777                 goto retry;
778         }
779
780         WARN_ON(ret);
781
782         drm_atomic_state_put(state);
783
784         drm_modeset_drop_locks(&ctx);
785         drm_modeset_acquire_fini(&ctx);
786 }
787
788 static unsigned long i915_audio_component_get_power(struct device *kdev)
789 {
790         struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
791         intel_wakeref_t ret;
792
793         /* Catch potential impedance mismatches before they occur! */
794         BUILD_BUG_ON(sizeof(intel_wakeref_t) > sizeof(unsigned long));
795
796         ret = intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
797
798         /* Force CDCLK to 2*BCLK as long as we need audio to be powered. */
799         if (dev_priv->audio_power_refcount++ == 0)
800                 if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
801                         glk_force_audio_cdclk(dev_priv, true);
802
803         return ret;
804 }
805
806 static void i915_audio_component_put_power(struct device *kdev,
807                                            unsigned long cookie)
808 {
809         struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
810
811         /* Stop forcing CDCLK to 2*BCLK if no need for audio to be powered. */
812         if (--dev_priv->audio_power_refcount == 0)
813                 if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
814                         glk_force_audio_cdclk(dev_priv, false);
815
816         intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO, cookie);
817 }
818
819 static void i915_audio_component_codec_wake_override(struct device *kdev,
820                                                      bool enable)
821 {
822         struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
823         unsigned long cookie;
824         u32 tmp;
825
826         if (!IS_GEN(dev_priv, 9))
827                 return;
828
829         cookie = i915_audio_component_get_power(kdev);
830
831         /*
832          * Enable/disable generating the codec wake signal, overriding the
833          * internal logic to generate the codec wake to controller.
834          */
835         tmp = I915_READ(HSW_AUD_CHICKENBIT);
836         tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL;
837         I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
838         usleep_range(1000, 1500);
839
840         if (enable) {
841                 tmp = I915_READ(HSW_AUD_CHICKENBIT);
842                 tmp |= SKL_AUD_CODEC_WAKE_SIGNAL;
843                 I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
844                 usleep_range(1000, 1500);
845         }
846
847         i915_audio_component_put_power(kdev, cookie);
848 }
849
850 /* Get CDCLK in kHz  */
851 static int i915_audio_component_get_cdclk_freq(struct device *kdev)
852 {
853         struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
854
855         if (WARN_ON_ONCE(!HAS_DDI(dev_priv)))
856                 return -ENODEV;
857
858         return dev_priv->cdclk.hw.cdclk;
859 }
860
861 /*
862  * get the intel_encoder according to the parameter port and pipe
863  * intel_encoder is saved by the index of pipe
864  * MST & (pipe >= 0): return the av_enc_map[pipe],
865  *   when port is matched
866  * MST & (pipe < 0): this is invalid
867  * Non-MST & (pipe >= 0): only pipe = 0 (the first device entry)
868  *   will get the right intel_encoder with port matched
869  * Non-MST & (pipe < 0): get the right intel_encoder with port matched
870  */
871 static struct intel_encoder *get_saved_enc(struct drm_i915_private *dev_priv,
872                                                int port, int pipe)
873 {
874         struct intel_encoder *encoder;
875
876         /* MST */
877         if (pipe >= 0) {
878                 if (WARN_ON(pipe >= ARRAY_SIZE(dev_priv->av_enc_map)))
879                         return NULL;
880
881                 encoder = dev_priv->av_enc_map[pipe];
882                 /*
883                  * when bootup, audio driver may not know it is
884                  * MST or not. So it will poll all the port & pipe
885                  * combinations
886                  */
887                 if (encoder != NULL && encoder->port == port &&
888                     encoder->type == INTEL_OUTPUT_DP_MST)
889                         return encoder;
890         }
891
892         /* Non-MST */
893         if (pipe > 0)
894                 return NULL;
895
896         for_each_pipe(dev_priv, pipe) {
897                 encoder = dev_priv->av_enc_map[pipe];
898                 if (encoder == NULL)
899                         continue;
900
901                 if (encoder->type == INTEL_OUTPUT_DP_MST)
902                         continue;
903
904                 if (port == encoder->port)
905                         return encoder;
906         }
907
908         return NULL;
909 }
910
911 static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
912                                                 int pipe, int rate)
913 {
914         struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
915         struct i915_audio_component *acomp = dev_priv->audio_component;
916         struct intel_encoder *encoder;
917         struct intel_crtc *crtc;
918         unsigned long cookie;
919         int err = 0;
920
921         if (!HAS_DDI(dev_priv))
922                 return 0;
923
924         cookie = i915_audio_component_get_power(kdev);
925         mutex_lock(&dev_priv->av_mutex);
926
927         /* 1. get the pipe */
928         encoder = get_saved_enc(dev_priv, port, pipe);
929         if (!encoder || !encoder->base.crtc) {
930                 DRM_DEBUG_KMS("Not valid for port %c\n", port_name(port));
931                 err = -ENODEV;
932                 goto unlock;
933         }
934
935         crtc = to_intel_crtc(encoder->base.crtc);
936
937         /* port must be valid now, otherwise the pipe will be invalid */
938         acomp->aud_sample_rate[port] = rate;
939
940         hsw_audio_config_update(encoder, crtc->config);
941
942  unlock:
943         mutex_unlock(&dev_priv->av_mutex);
944         i915_audio_component_put_power(kdev, cookie);
945         return err;
946 }
947
948 static int i915_audio_component_get_eld(struct device *kdev, int port,
949                                         int pipe, bool *enabled,
950                                         unsigned char *buf, int max_bytes)
951 {
952         struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
953         struct intel_encoder *intel_encoder;
954         const u8 *eld;
955         int ret = -EINVAL;
956
957         mutex_lock(&dev_priv->av_mutex);
958
959         intel_encoder = get_saved_enc(dev_priv, port, pipe);
960         if (!intel_encoder) {
961                 DRM_DEBUG_KMS("Not valid for port %c\n", port_name(port));
962                 mutex_unlock(&dev_priv->av_mutex);
963                 return ret;
964         }
965
966         ret = 0;
967         *enabled = intel_encoder->audio_connector != NULL;
968         if (*enabled) {
969                 eld = intel_encoder->audio_connector->eld;
970                 ret = drm_eld_size(eld);
971                 memcpy(buf, eld, min(max_bytes, ret));
972         }
973
974         mutex_unlock(&dev_priv->av_mutex);
975         return ret;
976 }
977
978 static const struct drm_audio_component_ops i915_audio_component_ops = {
979         .owner          = THIS_MODULE,
980         .get_power      = i915_audio_component_get_power,
981         .put_power      = i915_audio_component_put_power,
982         .codec_wake_override = i915_audio_component_codec_wake_override,
983         .get_cdclk_freq = i915_audio_component_get_cdclk_freq,
984         .sync_audio_rate = i915_audio_component_sync_audio_rate,
985         .get_eld        = i915_audio_component_get_eld,
986 };
987
988 static int i915_audio_component_bind(struct device *i915_kdev,
989                                      struct device *hda_kdev, void *data)
990 {
991         struct i915_audio_component *acomp = data;
992         struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
993         int i;
994
995         if (WARN_ON(acomp->base.ops || acomp->base.dev))
996                 return -EEXIST;
997
998         if (WARN_ON(!device_link_add(hda_kdev, i915_kdev, DL_FLAG_STATELESS)))
999                 return -ENOMEM;
1000
1001         drm_modeset_lock_all(&dev_priv->drm);
1002         acomp->base.ops = &i915_audio_component_ops;
1003         acomp->base.dev = i915_kdev;
1004         BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
1005         for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
1006                 acomp->aud_sample_rate[i] = 0;
1007         dev_priv->audio_component = acomp;
1008         drm_modeset_unlock_all(&dev_priv->drm);
1009
1010         return 0;
1011 }
1012
1013 static void i915_audio_component_unbind(struct device *i915_kdev,
1014                                         struct device *hda_kdev, void *data)
1015 {
1016         struct i915_audio_component *acomp = data;
1017         struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
1018
1019         drm_modeset_lock_all(&dev_priv->drm);
1020         acomp->base.ops = NULL;
1021         acomp->base.dev = NULL;
1022         dev_priv->audio_component = NULL;
1023         drm_modeset_unlock_all(&dev_priv->drm);
1024
1025         device_link_remove(hda_kdev, i915_kdev);
1026 }
1027
1028 static const struct component_ops i915_audio_component_bind_ops = {
1029         .bind   = i915_audio_component_bind,
1030         .unbind = i915_audio_component_unbind,
1031 };
1032
1033 /**
1034  * i915_audio_component_init - initialize and register the audio component
1035  * @dev_priv: i915 device instance
1036  *
1037  * This will register with the component framework a child component which
1038  * will bind dynamically to the snd_hda_intel driver's corresponding master
1039  * component when the latter is registered. During binding the child
1040  * initializes an instance of struct i915_audio_component which it receives
1041  * from the master. The master can then start to use the interface defined by
1042  * this struct. Each side can break the binding at any point by deregistering
1043  * its own component after which each side's component unbind callback is
1044  * called.
1045  *
1046  * We ignore any error during registration and continue with reduced
1047  * functionality (i.e. without HDMI audio).
1048  */
1049 static void i915_audio_component_init(struct drm_i915_private *dev_priv)
1050 {
1051         int ret;
1052
1053         ret = component_add_typed(dev_priv->drm.dev,
1054                                   &i915_audio_component_bind_ops,
1055                                   I915_COMPONENT_AUDIO);
1056         if (ret < 0) {
1057                 DRM_ERROR("failed to add audio component (%d)\n", ret);
1058                 /* continue with reduced functionality */
1059                 return;
1060         }
1061
1062         dev_priv->audio_component_registered = true;
1063 }
1064
1065 /**
1066  * i915_audio_component_cleanup - deregister the audio component
1067  * @dev_priv: i915 device instance
1068  *
1069  * Deregisters the audio component, breaking any existing binding to the
1070  * corresponding snd_hda_intel driver's master component.
1071  */
1072 static void i915_audio_component_cleanup(struct drm_i915_private *dev_priv)
1073 {
1074         if (!dev_priv->audio_component_registered)
1075                 return;
1076
1077         component_del(dev_priv->drm.dev, &i915_audio_component_bind_ops);
1078         dev_priv->audio_component_registered = false;
1079 }
1080
1081 /**
1082  * intel_audio_init() - Initialize the audio driver either using
1083  * component framework or using lpe audio bridge
1084  * @dev_priv: the i915 drm device private data
1085  *
1086  */
1087 void intel_audio_init(struct drm_i915_private *dev_priv)
1088 {
1089         if (intel_lpe_audio_init(dev_priv) < 0)
1090                 i915_audio_component_init(dev_priv);
1091 }
1092
1093 /**
1094  * intel_audio_deinit() - deinitialize the audio driver
1095  * @dev_priv: the i915 drm device private data
1096  *
1097  */
1098 void intel_audio_deinit(struct drm_i915_private *dev_priv)
1099 {
1100         if ((dev_priv)->lpe_audio.platdev != NULL)
1101                 intel_lpe_audio_teardown(dev_priv);
1102         else
1103                 i915_audio_component_cleanup(dev_priv);
1104 }
This page took 0.098892 seconds and 4 git commands to generate.