Loading...
Note: File does not exist in v4.10.11.
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/drm_eld.h>
29#include <drm/i915_component.h>
30
31#include "i915_drv.h"
32#include "intel_atomic.h"
33#include "intel_audio.h"
34#include "intel_audio_regs.h"
35#include "intel_cdclk.h"
36#include "intel_crtc.h"
37#include "intel_de.h"
38#include "intel_display_types.h"
39#include "intel_lpe_audio.h"
40
41/**
42 * DOC: High Definition Audio over HDMI and Display Port
43 *
44 * The graphics and audio drivers together support High Definition Audio over
45 * HDMI and Display Port. The audio programming sequences are divided into audio
46 * codec and controller enable and disable sequences. The graphics driver
47 * handles the audio codec sequences, while the audio driver handles the audio
48 * controller sequences.
49 *
50 * The disable sequences must be performed before disabling the transcoder or
51 * port. The enable sequences may only be performed after enabling the
52 * transcoder and port, and after completed link training. Therefore the audio
53 * enable/disable sequences are part of the modeset sequence.
54 *
55 * The codec and controller sequences could be done either parallel or serial,
56 * but generally the ELDV/PD change in the codec sequence indicates to the audio
57 * driver that the controller sequence should start. Indeed, most of the
58 * co-operation between the graphics and audio drivers is handled via audio
59 * related registers. (The notable exception is the power management, not
60 * covered here.)
61 *
62 * The struct &i915_audio_component is used to interact between the graphics
63 * and audio drivers. The struct &i915_audio_component_ops @ops in it is
64 * defined in graphics driver and called in audio driver. The
65 * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
66 */
67
68struct intel_audio_funcs {
69 void (*audio_codec_enable)(struct intel_encoder *encoder,
70 const struct intel_crtc_state *crtc_state,
71 const struct drm_connector_state *conn_state);
72 void (*audio_codec_disable)(struct intel_encoder *encoder,
73 const struct intel_crtc_state *old_crtc_state,
74 const struct drm_connector_state *old_conn_state);
75 void (*audio_codec_get_config)(struct intel_encoder *encoder,
76 struct intel_crtc_state *crtc_state);
77};
78
79struct hdmi_aud_ncts {
80 int sample_rate;
81 int clock;
82 int n;
83 int cts;
84};
85
86static const struct {
87 int clock;
88 u32 config;
89} hdmi_audio_clock[] = {
90 { 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 },
91 { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */
92 { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 },
93 { 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 },
94 { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 },
95 { 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 },
96 { 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 },
97 { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 },
98 { 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 },
99 { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 },
100 { 296703, AUD_CONFIG_PIXEL_CLOCK_HDMI_296703 },
101 { 297000, AUD_CONFIG_PIXEL_CLOCK_HDMI_297000 },
102 { 593407, AUD_CONFIG_PIXEL_CLOCK_HDMI_593407 },
103 { 594000, AUD_CONFIG_PIXEL_CLOCK_HDMI_594000 },
104};
105
106/* HDMI N/CTS table */
107#define TMDS_297M 297000
108#define TMDS_296M 296703
109#define TMDS_594M 594000
110#define TMDS_593M 593407
111
112static const struct hdmi_aud_ncts hdmi_aud_ncts_24bpp[] = {
113 { 32000, TMDS_296M, 5824, 421875 },
114 { 32000, TMDS_297M, 3072, 222750 },
115 { 32000, TMDS_593M, 5824, 843750 },
116 { 32000, TMDS_594M, 3072, 445500 },
117 { 44100, TMDS_296M, 4459, 234375 },
118 { 44100, TMDS_297M, 4704, 247500 },
119 { 44100, TMDS_593M, 8918, 937500 },
120 { 44100, TMDS_594M, 9408, 990000 },
121 { 88200, TMDS_296M, 8918, 234375 },
122 { 88200, TMDS_297M, 9408, 247500 },
123 { 88200, TMDS_593M, 17836, 937500 },
124 { 88200, TMDS_594M, 18816, 990000 },
125 { 176400, TMDS_296M, 17836, 234375 },
126 { 176400, TMDS_297M, 18816, 247500 },
127 { 176400, TMDS_593M, 35672, 937500 },
128 { 176400, TMDS_594M, 37632, 990000 },
129 { 48000, TMDS_296M, 5824, 281250 },
130 { 48000, TMDS_297M, 5120, 247500 },
131 { 48000, TMDS_593M, 5824, 562500 },
132 { 48000, TMDS_594M, 6144, 594000 },
133 { 96000, TMDS_296M, 11648, 281250 },
134 { 96000, TMDS_297M, 10240, 247500 },
135 { 96000, TMDS_593M, 11648, 562500 },
136 { 96000, TMDS_594M, 12288, 594000 },
137 { 192000, TMDS_296M, 23296, 281250 },
138 { 192000, TMDS_297M, 20480, 247500 },
139 { 192000, TMDS_593M, 23296, 562500 },
140 { 192000, TMDS_594M, 24576, 594000 },
141};
142
143/* Appendix C - N & CTS values for deep color from HDMI 2.0 spec*/
144/* HDMI N/CTS table for 10 bit deep color(30 bpp)*/
145#define TMDS_371M 371250
146#define TMDS_370M 370878
147
148static const struct hdmi_aud_ncts hdmi_aud_ncts_30bpp[] = {
149 { 32000, TMDS_370M, 5824, 527344 },
150 { 32000, TMDS_371M, 6144, 556875 },
151 { 44100, TMDS_370M, 8918, 585938 },
152 { 44100, TMDS_371M, 4704, 309375 },
153 { 88200, TMDS_370M, 17836, 585938 },
154 { 88200, TMDS_371M, 9408, 309375 },
155 { 176400, TMDS_370M, 35672, 585938 },
156 { 176400, TMDS_371M, 18816, 309375 },
157 { 48000, TMDS_370M, 11648, 703125 },
158 { 48000, TMDS_371M, 5120, 309375 },
159 { 96000, TMDS_370M, 23296, 703125 },
160 { 96000, TMDS_371M, 10240, 309375 },
161 { 192000, TMDS_370M, 46592, 703125 },
162 { 192000, TMDS_371M, 20480, 309375 },
163};
164
165/* HDMI N/CTS table for 12 bit deep color(36 bpp)*/
166#define TMDS_445_5M 445500
167#define TMDS_445M 445054
168
169static const struct hdmi_aud_ncts hdmi_aud_ncts_36bpp[] = {
170 { 32000, TMDS_445M, 5824, 632813 },
171 { 32000, TMDS_445_5M, 4096, 445500 },
172 { 44100, TMDS_445M, 8918, 703125 },
173 { 44100, TMDS_445_5M, 4704, 371250 },
174 { 88200, TMDS_445M, 17836, 703125 },
175 { 88200, TMDS_445_5M, 9408, 371250 },
176 { 176400, TMDS_445M, 35672, 703125 },
177 { 176400, TMDS_445_5M, 18816, 371250 },
178 { 48000, TMDS_445M, 5824, 421875 },
179 { 48000, TMDS_445_5M, 5120, 371250 },
180 { 96000, TMDS_445M, 11648, 421875 },
181 { 96000, TMDS_445_5M, 10240, 371250 },
182 { 192000, TMDS_445M, 23296, 421875 },
183 { 192000, TMDS_445_5M, 20480, 371250 },
184};
185
186/* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */
187static u32 audio_config_hdmi_pixel_clock(const struct intel_crtc_state *crtc_state)
188{
189 struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
190 const struct drm_display_mode *adjusted_mode =
191 &crtc_state->hw.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 (DISPLAY_VER(i915) < 12 && adjusted_mode->crtc_clock > 148500)
200 i = ARRAY_SIZE(hdmi_audio_clock);
201
202 if (i == ARRAY_SIZE(hdmi_audio_clock)) {
203 drm_dbg_kms(&i915->drm,
204 "HDMI audio pixel clock setting for %d not found, falling back to defaults\n",
205 adjusted_mode->crtc_clock);
206 i = 1;
207 }
208
209 drm_dbg_kms(&i915->drm,
210 "Configuring HDMI audio for pixel clock %d (0x%08x)\n",
211 hdmi_audio_clock[i].clock,
212 hdmi_audio_clock[i].config);
213
214 return hdmi_audio_clock[i].config;
215}
216
217static int audio_config_hdmi_get_n(const struct intel_crtc_state *crtc_state,
218 int rate)
219{
220 const struct hdmi_aud_ncts *hdmi_ncts_table;
221 int i, size;
222
223 if (crtc_state->pipe_bpp == 36) {
224 hdmi_ncts_table = hdmi_aud_ncts_36bpp;
225 size = ARRAY_SIZE(hdmi_aud_ncts_36bpp);
226 } else if (crtc_state->pipe_bpp == 30) {
227 hdmi_ncts_table = hdmi_aud_ncts_30bpp;
228 size = ARRAY_SIZE(hdmi_aud_ncts_30bpp);
229 } else {
230 hdmi_ncts_table = hdmi_aud_ncts_24bpp;
231 size = ARRAY_SIZE(hdmi_aud_ncts_24bpp);
232 }
233
234 for (i = 0; i < size; i++) {
235 if (rate == hdmi_ncts_table[i].sample_rate &&
236 crtc_state->port_clock == hdmi_ncts_table[i].clock) {
237 return hdmi_ncts_table[i].n;
238 }
239 }
240 return 0;
241}
242
243/* ELD buffer size in dwords */
244static int g4x_eld_buffer_size(struct drm_i915_private *i915)
245{
246 u32 tmp;
247
248 tmp = intel_de_read(i915, G4X_AUD_CNTL_ST);
249
250 return REG_FIELD_GET(G4X_ELD_BUFFER_SIZE_MASK, tmp);
251}
252
253static void g4x_audio_codec_get_config(struct intel_encoder *encoder,
254 struct intel_crtc_state *crtc_state)
255{
256 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
257 u32 *eld = (u32 *)crtc_state->eld;
258 int eld_buffer_size, len, i;
259 u32 tmp;
260
261 tmp = intel_de_read(i915, G4X_AUD_CNTL_ST);
262 if ((tmp & G4X_ELD_VALID) == 0)
263 return;
264
265 intel_de_rmw(i915, G4X_AUD_CNTL_ST, G4X_ELD_ADDRESS_MASK, 0);
266
267 eld_buffer_size = g4x_eld_buffer_size(i915);
268 len = min_t(int, sizeof(crtc_state->eld) / 4, eld_buffer_size);
269
270 for (i = 0; i < len; i++)
271 eld[i] = intel_de_read(i915, G4X_HDMIW_HDMIEDID);
272}
273
274static void g4x_audio_codec_disable(struct intel_encoder *encoder,
275 const struct intel_crtc_state *old_crtc_state,
276 const struct drm_connector_state *old_conn_state)
277{
278 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
279 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
280
281 /* Invalidate ELD */
282 intel_de_rmw(i915, G4X_AUD_CNTL_ST,
283 G4X_ELD_VALID, 0);
284
285 intel_crtc_wait_for_next_vblank(crtc);
286 intel_crtc_wait_for_next_vblank(crtc);
287}
288
289static void g4x_audio_codec_enable(struct intel_encoder *encoder,
290 const struct intel_crtc_state *crtc_state,
291 const struct drm_connector_state *conn_state)
292{
293 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
294 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
295 const u32 *eld = (const u32 *)crtc_state->eld;
296 int eld_buffer_size, len, i;
297
298 intel_crtc_wait_for_next_vblank(crtc);
299
300 intel_de_rmw(i915, G4X_AUD_CNTL_ST,
301 G4X_ELD_VALID | G4X_ELD_ADDRESS_MASK, 0);
302
303 eld_buffer_size = g4x_eld_buffer_size(i915);
304 len = min(drm_eld_size(crtc_state->eld) / 4, eld_buffer_size);
305
306 for (i = 0; i < len; i++)
307 intel_de_write(i915, G4X_HDMIW_HDMIEDID, eld[i]);
308 for (; i < eld_buffer_size; i++)
309 intel_de_write(i915, G4X_HDMIW_HDMIEDID, 0);
310
311 drm_WARN_ON(&i915->drm,
312 (intel_de_read(i915, G4X_AUD_CNTL_ST) & G4X_ELD_ADDRESS_MASK) != 0);
313
314 intel_de_rmw(i915, G4X_AUD_CNTL_ST,
315 0, G4X_ELD_VALID);
316}
317
318static void
319hsw_dp_audio_config_update(struct intel_encoder *encoder,
320 const struct intel_crtc_state *crtc_state)
321{
322 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
323 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
324
325 /* Enable time stamps. Let HW calculate Maud/Naud values */
326 intel_de_rmw(i915, HSW_AUD_CFG(cpu_transcoder),
327 AUD_CONFIG_N_VALUE_INDEX |
328 AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK |
329 AUD_CONFIG_UPPER_N_MASK |
330 AUD_CONFIG_LOWER_N_MASK |
331 AUD_CONFIG_N_PROG_ENABLE,
332 AUD_CONFIG_N_VALUE_INDEX);
333
334}
335
336static void
337hsw_hdmi_audio_config_update(struct intel_encoder *encoder,
338 const struct intel_crtc_state *crtc_state)
339{
340 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
341 struct i915_audio_component *acomp = i915->display.audio.component;
342 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
343 enum port port = encoder->port;
344 int n, rate;
345 u32 tmp;
346
347 rate = acomp ? acomp->aud_sample_rate[port] : 0;
348
349 tmp = intel_de_read(i915, HSW_AUD_CFG(cpu_transcoder));
350 tmp &= ~AUD_CONFIG_N_VALUE_INDEX;
351 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK;
352 tmp &= ~AUD_CONFIG_N_PROG_ENABLE;
353 tmp |= audio_config_hdmi_pixel_clock(crtc_state);
354
355 n = audio_config_hdmi_get_n(crtc_state, rate);
356 if (n != 0) {
357 drm_dbg_kms(&i915->drm, "using N %d\n", n);
358
359 tmp &= ~AUD_CONFIG_N_MASK;
360 tmp |= AUD_CONFIG_N(n);
361 tmp |= AUD_CONFIG_N_PROG_ENABLE;
362 } else {
363 drm_dbg_kms(&i915->drm, "using automatic N\n");
364 }
365
366 intel_de_write(i915, HSW_AUD_CFG(cpu_transcoder), tmp);
367
368 /*
369 * Let's disable "Enable CTS or M Prog bit"
370 * and let HW calculate the value
371 */
372 tmp = intel_de_read(i915, HSW_AUD_M_CTS_ENABLE(cpu_transcoder));
373 tmp &= ~AUD_M_CTS_M_PROG_ENABLE;
374 tmp &= ~AUD_M_CTS_M_VALUE_INDEX;
375 intel_de_write(i915, HSW_AUD_M_CTS_ENABLE(cpu_transcoder), tmp);
376}
377
378static void
379hsw_audio_config_update(struct intel_encoder *encoder,
380 const struct intel_crtc_state *crtc_state)
381{
382 if (intel_crtc_has_dp_encoder(crtc_state))
383 hsw_dp_audio_config_update(encoder, crtc_state);
384 else
385 hsw_hdmi_audio_config_update(encoder, crtc_state);
386}
387
388static void hsw_audio_codec_disable(struct intel_encoder *encoder,
389 const struct intel_crtc_state *old_crtc_state,
390 const struct drm_connector_state *old_conn_state)
391{
392 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
393 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
394 enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
395
396 mutex_lock(&i915->display.audio.mutex);
397
398 /* Disable timestamps */
399 intel_de_rmw(i915, HSW_AUD_CFG(cpu_transcoder),
400 AUD_CONFIG_N_VALUE_INDEX |
401 AUD_CONFIG_UPPER_N_MASK |
402 AUD_CONFIG_LOWER_N_MASK,
403 AUD_CONFIG_N_PROG_ENABLE |
404 (intel_crtc_has_dp_encoder(old_crtc_state) ?
405 AUD_CONFIG_N_VALUE_INDEX : 0));
406
407 /* Invalidate ELD */
408 intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
409 AUDIO_ELD_VALID(cpu_transcoder), 0);
410
411 intel_crtc_wait_for_next_vblank(crtc);
412 intel_crtc_wait_for_next_vblank(crtc);
413
414 /* Disable audio presence detect */
415 intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
416 AUDIO_OUTPUT_ENABLE(cpu_transcoder), 0);
417
418 mutex_unlock(&i915->display.audio.mutex);
419}
420
421static unsigned int calc_hblank_early_prog(struct intel_encoder *encoder,
422 const struct intel_crtc_state *crtc_state)
423{
424 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
425 unsigned int link_clks_available, link_clks_required;
426 unsigned int tu_data, tu_line, link_clks_active;
427 unsigned int h_active, h_total, hblank_delta, pixel_clk;
428 unsigned int fec_coeff, cdclk, vdsc_bppx16;
429 unsigned int link_clk, lanes;
430 unsigned int hblank_rise;
431
432 h_active = crtc_state->hw.adjusted_mode.crtc_hdisplay;
433 h_total = crtc_state->hw.adjusted_mode.crtc_htotal;
434 pixel_clk = crtc_state->hw.adjusted_mode.crtc_clock;
435 vdsc_bppx16 = crtc_state->dsc.compressed_bpp_x16;
436 cdclk = i915->display.cdclk.hw.cdclk;
437 /* fec= 0.972261, using rounding multiplier of 1000000 */
438 fec_coeff = 972261;
439 link_clk = crtc_state->port_clock;
440 lanes = crtc_state->lane_count;
441
442 drm_dbg_kms(&i915->drm,
443 "h_active = %u link_clk = %u : lanes = %u vdsc_bpp = " BPP_X16_FMT " cdclk = %u\n",
444 h_active, link_clk, lanes, BPP_X16_ARGS(vdsc_bppx16), cdclk);
445
446 if (WARN_ON(!link_clk || !pixel_clk || !lanes || !vdsc_bppx16 || !cdclk))
447 return 0;
448
449 link_clks_available = (h_total - h_active) * link_clk / pixel_clk - 28;
450 link_clks_required = DIV_ROUND_UP(192000 * h_total, 1000 * pixel_clk) * (48 / lanes + 2);
451
452 if (link_clks_available > link_clks_required)
453 hblank_delta = 32;
454 else
455 hblank_delta = DIV64_U64_ROUND_UP(mul_u32_u32(5 * (link_clk + cdclk), pixel_clk),
456 mul_u32_u32(link_clk, cdclk));
457
458 tu_data = div64_u64(mul_u32_u32(pixel_clk * vdsc_bppx16 * 8, 1000000),
459 mul_u32_u32(link_clk * lanes * 16, fec_coeff));
460 tu_line = div64_u64(h_active * mul_u32_u32(link_clk, fec_coeff),
461 mul_u32_u32(64 * pixel_clk, 1000000));
462 link_clks_active = (tu_line - 1) * 64 + tu_data;
463
464 hblank_rise = (link_clks_active + 6 * DIV_ROUND_UP(link_clks_active, 250) + 4) * pixel_clk / link_clk;
465
466 return h_active - hblank_rise + hblank_delta;
467}
468
469static unsigned int calc_samples_room(const struct intel_crtc_state *crtc_state)
470{
471 unsigned int h_active, h_total, pixel_clk;
472 unsigned int link_clk, lanes;
473
474 h_active = crtc_state->hw.adjusted_mode.hdisplay;
475 h_total = crtc_state->hw.adjusted_mode.htotal;
476 pixel_clk = crtc_state->hw.adjusted_mode.clock;
477 link_clk = crtc_state->port_clock;
478 lanes = crtc_state->lane_count;
479
480 return ((h_total - h_active) * link_clk - 12 * pixel_clk) /
481 (pixel_clk * (48 / lanes + 2));
482}
483
484static void enable_audio_dsc_wa(struct intel_encoder *encoder,
485 const struct intel_crtc_state *crtc_state)
486{
487 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
488 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
489 unsigned int hblank_early_prog, samples_room;
490 unsigned int val;
491
492 if (DISPLAY_VER(i915) < 11)
493 return;
494
495 val = intel_de_read(i915, AUD_CONFIG_BE);
496
497 if (DISPLAY_VER(i915) == 11)
498 val |= HBLANK_EARLY_ENABLE_ICL(cpu_transcoder);
499 else if (DISPLAY_VER(i915) >= 12)
500 val |= HBLANK_EARLY_ENABLE_TGL(cpu_transcoder);
501
502 if (crtc_state->dsc.compression_enable &&
503 crtc_state->hw.adjusted_mode.hdisplay >= 3840 &&
504 crtc_state->hw.adjusted_mode.vdisplay >= 2160) {
505 /* Get hblank early enable value required */
506 val &= ~HBLANK_START_COUNT_MASK(cpu_transcoder);
507 hblank_early_prog = calc_hblank_early_prog(encoder, crtc_state);
508 if (hblank_early_prog < 32)
509 val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_32);
510 else if (hblank_early_prog < 64)
511 val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_64);
512 else if (hblank_early_prog < 96)
513 val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_96);
514 else
515 val |= HBLANK_START_COUNT(cpu_transcoder, HBLANK_START_COUNT_128);
516
517 /* Get samples room value required */
518 val &= ~NUMBER_SAMPLES_PER_LINE_MASK(cpu_transcoder);
519 samples_room = calc_samples_room(crtc_state);
520 if (samples_room < 3)
521 val |= NUMBER_SAMPLES_PER_LINE(cpu_transcoder, samples_room);
522 else /* Program 0 i.e "All Samples available in buffer" */
523 val |= NUMBER_SAMPLES_PER_LINE(cpu_transcoder, 0x0);
524 }
525
526 intel_de_write(i915, AUD_CONFIG_BE, val);
527}
528
529static void hsw_audio_codec_enable(struct intel_encoder *encoder,
530 const struct intel_crtc_state *crtc_state,
531 const struct drm_connector_state *conn_state)
532{
533 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
534 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
535 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
536
537 mutex_lock(&i915->display.audio.mutex);
538
539 /* Enable Audio WA for 4k DSC usecases */
540 if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP))
541 enable_audio_dsc_wa(encoder, crtc_state);
542
543 /* Enable audio presence detect */
544 intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
545 0, AUDIO_OUTPUT_ENABLE(cpu_transcoder));
546
547 intel_crtc_wait_for_next_vblank(crtc);
548
549 /* Invalidate ELD */
550 intel_de_rmw(i915, HSW_AUD_PIN_ELD_CP_VLD,
551 AUDIO_ELD_VALID(cpu_transcoder), 0);
552
553 /*
554 * The audio componenent is used to convey the ELD
555 * instead using of the hardware ELD buffer.
556 */
557
558 /* Enable timestamps */
559 hsw_audio_config_update(encoder, crtc_state);
560
561 mutex_unlock(&i915->display.audio.mutex);
562}
563
564struct ibx_audio_regs {
565 i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2;
566};
567
568static void ibx_audio_regs_init(struct drm_i915_private *i915,
569 enum pipe pipe,
570 struct ibx_audio_regs *regs)
571{
572 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
573 regs->hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
574 regs->aud_config = VLV_AUD_CFG(pipe);
575 regs->aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
576 regs->aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
577 } else if (HAS_PCH_CPT(i915)) {
578 regs->hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
579 regs->aud_config = CPT_AUD_CFG(pipe);
580 regs->aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
581 regs->aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
582 } else if (HAS_PCH_IBX(i915)) {
583 regs->hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
584 regs->aud_config = IBX_AUD_CFG(pipe);
585 regs->aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
586 regs->aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
587 }
588}
589
590static void ibx_audio_codec_disable(struct intel_encoder *encoder,
591 const struct intel_crtc_state *old_crtc_state,
592 const struct drm_connector_state *old_conn_state)
593{
594 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
595 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
596 enum port port = encoder->port;
597 enum pipe pipe = crtc->pipe;
598 struct ibx_audio_regs regs;
599
600 if (drm_WARN_ON(&i915->drm, port == PORT_A))
601 return;
602
603 ibx_audio_regs_init(i915, pipe, ®s);
604
605 mutex_lock(&i915->display.audio.mutex);
606
607 /* Disable timestamps */
608 intel_de_rmw(i915, regs.aud_config,
609 AUD_CONFIG_N_VALUE_INDEX |
610 AUD_CONFIG_UPPER_N_MASK |
611 AUD_CONFIG_LOWER_N_MASK,
612 AUD_CONFIG_N_PROG_ENABLE |
613 (intel_crtc_has_dp_encoder(old_crtc_state) ?
614 AUD_CONFIG_N_VALUE_INDEX : 0));
615
616 /* Invalidate ELD */
617 intel_de_rmw(i915, regs.aud_cntrl_st2,
618 IBX_ELD_VALID(port), 0);
619
620 mutex_unlock(&i915->display.audio.mutex);
621
622 intel_crtc_wait_for_next_vblank(crtc);
623 intel_crtc_wait_for_next_vblank(crtc);
624}
625
626static void ibx_audio_codec_enable(struct intel_encoder *encoder,
627 const struct intel_crtc_state *crtc_state,
628 const struct drm_connector_state *conn_state)
629{
630 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
631 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
632 enum port port = encoder->port;
633 enum pipe pipe = crtc->pipe;
634 struct ibx_audio_regs regs;
635
636 if (drm_WARN_ON(&i915->drm, port == PORT_A))
637 return;
638
639 intel_crtc_wait_for_next_vblank(crtc);
640
641 ibx_audio_regs_init(i915, pipe, ®s);
642
643 mutex_lock(&i915->display.audio.mutex);
644
645 /* Invalidate ELD */
646 intel_de_rmw(i915, regs.aud_cntrl_st2,
647 IBX_ELD_VALID(port), 0);
648
649 /*
650 * The audio componenent is used to convey the ELD
651 * instead using of the hardware ELD buffer.
652 */
653
654 /* Enable timestamps */
655 intel_de_rmw(i915, regs.aud_config,
656 AUD_CONFIG_N_VALUE_INDEX |
657 AUD_CONFIG_N_PROG_ENABLE |
658 AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK,
659 (intel_crtc_has_dp_encoder(crtc_state) ?
660 AUD_CONFIG_N_VALUE_INDEX :
661 audio_config_hdmi_pixel_clock(crtc_state)));
662
663 mutex_unlock(&i915->display.audio.mutex);
664}
665
666void intel_audio_sdp_split_update(const struct intel_crtc_state *crtc_state)
667{
668 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
669 struct drm_i915_private *i915 = to_i915(crtc->base.dev);
670 enum transcoder trans = crtc_state->cpu_transcoder;
671
672 if (HAS_DP20(i915))
673 intel_de_rmw(i915, AUD_DP_2DOT0_CTRL(trans), AUD_ENABLE_SDP_SPLIT,
674 crtc_state->sdp_split_enable ? AUD_ENABLE_SDP_SPLIT : 0);
675}
676
677bool intel_audio_compute_config(struct intel_encoder *encoder,
678 struct intel_crtc_state *crtc_state,
679 struct drm_connector_state *conn_state)
680{
681 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
682 struct drm_connector *connector = conn_state->connector;
683 const struct drm_display_mode *adjusted_mode =
684 &crtc_state->hw.adjusted_mode;
685
686 if (!connector->eld[0]) {
687 drm_dbg_kms(&i915->drm,
688 "Bogus ELD on [CONNECTOR:%d:%s]\n",
689 connector->base.id, connector->name);
690 return false;
691 }
692
693 BUILD_BUG_ON(sizeof(crtc_state->eld) != sizeof(connector->eld));
694 memcpy(crtc_state->eld, connector->eld, sizeof(crtc_state->eld));
695
696 crtc_state->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
697
698 return true;
699}
700
701/**
702 * intel_audio_codec_enable - Enable the audio codec for HD audio
703 * @encoder: encoder on which to enable audio
704 * @crtc_state: pointer to the current crtc state.
705 * @conn_state: pointer to the current connector state.
706 *
707 * The enable sequences may only be performed after enabling the transcoder and
708 * port, and after completed link training.
709 */
710void intel_audio_codec_enable(struct intel_encoder *encoder,
711 const struct intel_crtc_state *crtc_state,
712 const struct drm_connector_state *conn_state)
713{
714 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
715 struct i915_audio_component *acomp = i915->display.audio.component;
716 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
717 struct intel_connector *connector = to_intel_connector(conn_state->connector);
718 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
719 struct intel_audio_state *audio_state;
720 enum port port = encoder->port;
721
722 if (!crtc_state->has_audio)
723 return;
724
725 drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Enable audio codec on [CRTC:%d:%s], %u bytes ELD\n",
726 connector->base.base.id, connector->base.name,
727 encoder->base.base.id, encoder->base.name,
728 crtc->base.base.id, crtc->base.name,
729 drm_eld_size(crtc_state->eld));
730
731 if (i915->display.funcs.audio)
732 i915->display.funcs.audio->audio_codec_enable(encoder,
733 crtc_state,
734 conn_state);
735
736 mutex_lock(&i915->display.audio.mutex);
737
738 audio_state = &i915->display.audio.state[cpu_transcoder];
739
740 audio_state->encoder = encoder;
741 BUILD_BUG_ON(sizeof(audio_state->eld) != sizeof(crtc_state->eld));
742 memcpy(audio_state->eld, crtc_state->eld, sizeof(audio_state->eld));
743
744 mutex_unlock(&i915->display.audio.mutex);
745
746 if (acomp && acomp->base.audio_ops &&
747 acomp->base.audio_ops->pin_eld_notify) {
748 /* audio drivers expect cpu_transcoder = -1 to indicate Non-MST cases */
749 if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST))
750 cpu_transcoder = -1;
751 acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
752 (int)port, (int)cpu_transcoder);
753 }
754
755 intel_lpe_audio_notify(i915, cpu_transcoder, port, crtc_state->eld,
756 crtc_state->port_clock,
757 intel_crtc_has_dp_encoder(crtc_state));
758}
759
760/**
761 * intel_audio_codec_disable - Disable the audio codec for HD audio
762 * @encoder: encoder on which to disable audio
763 * @old_crtc_state: pointer to the old crtc state.
764 * @old_conn_state: pointer to the old connector state.
765 *
766 * The disable sequences must be performed before disabling the transcoder or
767 * port.
768 */
769void intel_audio_codec_disable(struct intel_encoder *encoder,
770 const struct intel_crtc_state *old_crtc_state,
771 const struct drm_connector_state *old_conn_state)
772{
773 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
774 struct i915_audio_component *acomp = i915->display.audio.component;
775 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
776 struct intel_connector *connector = to_intel_connector(old_conn_state->connector);
777 enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
778 struct intel_audio_state *audio_state;
779 enum port port = encoder->port;
780
781 if (!old_crtc_state->has_audio)
782 return;
783
784 drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Disable audio codec on [CRTC:%d:%s]\n",
785 connector->base.base.id, connector->base.name,
786 encoder->base.base.id, encoder->base.name,
787 crtc->base.base.id, crtc->base.name);
788
789 if (i915->display.funcs.audio)
790 i915->display.funcs.audio->audio_codec_disable(encoder,
791 old_crtc_state,
792 old_conn_state);
793
794 mutex_lock(&i915->display.audio.mutex);
795
796 audio_state = &i915->display.audio.state[cpu_transcoder];
797
798 audio_state->encoder = NULL;
799 memset(audio_state->eld, 0, sizeof(audio_state->eld));
800
801 mutex_unlock(&i915->display.audio.mutex);
802
803 if (acomp && acomp->base.audio_ops &&
804 acomp->base.audio_ops->pin_eld_notify) {
805 /* audio drivers expect cpu_transcoder = -1 to indicate Non-MST cases */
806 if (!intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_DP_MST))
807 cpu_transcoder = -1;
808 acomp->base.audio_ops->pin_eld_notify(acomp->base.audio_ops->audio_ptr,
809 (int)port, (int)cpu_transcoder);
810 }
811
812 intel_lpe_audio_notify(i915, cpu_transcoder, port, NULL, 0, false);
813}
814
815static void intel_acomp_get_config(struct intel_encoder *encoder,
816 struct intel_crtc_state *crtc_state)
817{
818 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
819 enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
820 struct intel_audio_state *audio_state;
821
822 mutex_lock(&i915->display.audio.mutex);
823
824 audio_state = &i915->display.audio.state[cpu_transcoder];
825
826 if (audio_state->encoder)
827 memcpy(crtc_state->eld, audio_state->eld, sizeof(audio_state->eld));
828
829 mutex_unlock(&i915->display.audio.mutex);
830}
831
832void intel_audio_codec_get_config(struct intel_encoder *encoder,
833 struct intel_crtc_state *crtc_state)
834{
835 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
836
837 if (!crtc_state->has_audio)
838 return;
839
840 if (i915->display.funcs.audio)
841 i915->display.funcs.audio->audio_codec_get_config(encoder, crtc_state);
842}
843
844static const struct intel_audio_funcs g4x_audio_funcs = {
845 .audio_codec_enable = g4x_audio_codec_enable,
846 .audio_codec_disable = g4x_audio_codec_disable,
847 .audio_codec_get_config = g4x_audio_codec_get_config,
848};
849
850static const struct intel_audio_funcs ibx_audio_funcs = {
851 .audio_codec_enable = ibx_audio_codec_enable,
852 .audio_codec_disable = ibx_audio_codec_disable,
853 .audio_codec_get_config = intel_acomp_get_config,
854};
855
856static const struct intel_audio_funcs hsw_audio_funcs = {
857 .audio_codec_enable = hsw_audio_codec_enable,
858 .audio_codec_disable = hsw_audio_codec_disable,
859 .audio_codec_get_config = intel_acomp_get_config,
860};
861
862/**
863 * intel_audio_hooks_init - Set up chip specific audio hooks
864 * @i915: device private
865 */
866void intel_audio_hooks_init(struct drm_i915_private *i915)
867{
868 if (IS_G4X(i915))
869 i915->display.funcs.audio = &g4x_audio_funcs;
870 else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915) ||
871 HAS_PCH_CPT(i915) || HAS_PCH_IBX(i915))
872 i915->display.funcs.audio = &ibx_audio_funcs;
873 else if (IS_HASWELL(i915) || DISPLAY_VER(i915) >= 8)
874 i915->display.funcs.audio = &hsw_audio_funcs;
875}
876
877struct aud_ts_cdclk_m_n {
878 u8 m;
879 u16 n;
880};
881
882void intel_audio_cdclk_change_pre(struct drm_i915_private *i915)
883{
884 if (DISPLAY_VER(i915) >= 13)
885 intel_de_rmw(i915, AUD_TS_CDCLK_M, AUD_TS_CDCLK_M_EN, 0);
886}
887
888static void get_aud_ts_cdclk_m_n(int refclk, int cdclk, struct aud_ts_cdclk_m_n *aud_ts)
889{
890 aud_ts->m = 60;
891 aud_ts->n = cdclk * aud_ts->m / 24000;
892}
893
894void intel_audio_cdclk_change_post(struct drm_i915_private *i915)
895{
896 struct aud_ts_cdclk_m_n aud_ts;
897
898 if (DISPLAY_VER(i915) >= 13) {
899 get_aud_ts_cdclk_m_n(i915->display.cdclk.hw.ref, i915->display.cdclk.hw.cdclk, &aud_ts);
900
901 intel_de_write(i915, AUD_TS_CDCLK_N, aud_ts.n);
902 intel_de_write(i915, AUD_TS_CDCLK_M, aud_ts.m | AUD_TS_CDCLK_M_EN);
903 drm_dbg_kms(&i915->drm, "aud_ts_cdclk set to M=%u, N=%u\n", aud_ts.m, aud_ts.n);
904 }
905}
906
907static int glk_force_audio_cdclk_commit(struct intel_atomic_state *state,
908 struct intel_crtc *crtc,
909 bool enable)
910{
911 struct intel_cdclk_state *cdclk_state;
912 int ret;
913
914 /* need to hold at least one crtc lock for the global state */
915 ret = drm_modeset_lock(&crtc->base.mutex, state->base.acquire_ctx);
916 if (ret)
917 return ret;
918
919 cdclk_state = intel_atomic_get_cdclk_state(state);
920 if (IS_ERR(cdclk_state))
921 return PTR_ERR(cdclk_state);
922
923 cdclk_state->force_min_cdclk = enable ? 2 * 96000 : 0;
924
925 return drm_atomic_commit(&state->base);
926}
927
928static void glk_force_audio_cdclk(struct drm_i915_private *i915,
929 bool enable)
930{
931 struct drm_modeset_acquire_ctx ctx;
932 struct drm_atomic_state *state;
933 struct intel_crtc *crtc;
934 int ret;
935
936 crtc = intel_first_crtc(i915);
937 if (!crtc)
938 return;
939
940 drm_modeset_acquire_init(&ctx, 0);
941 state = drm_atomic_state_alloc(&i915->drm);
942 if (drm_WARN_ON(&i915->drm, !state))
943 return;
944
945 state->acquire_ctx = &ctx;
946 to_intel_atomic_state(state)->internal = true;
947
948retry:
949 ret = glk_force_audio_cdclk_commit(to_intel_atomic_state(state), crtc,
950 enable);
951 if (ret == -EDEADLK) {
952 drm_atomic_state_clear(state);
953 drm_modeset_backoff(&ctx);
954 goto retry;
955 }
956
957 drm_WARN_ON(&i915->drm, ret);
958
959 drm_atomic_state_put(state);
960
961 drm_modeset_drop_locks(&ctx);
962 drm_modeset_acquire_fini(&ctx);
963}
964
965static unsigned long i915_audio_component_get_power(struct device *kdev)
966{
967 struct drm_i915_private *i915 = kdev_to_i915(kdev);
968 intel_wakeref_t ret;
969
970 /* Catch potential impedance mismatches before they occur! */
971 BUILD_BUG_ON(sizeof(intel_wakeref_t) > sizeof(unsigned long));
972
973 ret = intel_display_power_get(i915, POWER_DOMAIN_AUDIO_PLAYBACK);
974
975 if (i915->display.audio.power_refcount++ == 0) {
976 if (DISPLAY_VER(i915) >= 9) {
977 intel_de_write(i915, AUD_FREQ_CNTRL,
978 i915->display.audio.freq_cntrl);
979 drm_dbg_kms(&i915->drm,
980 "restored AUD_FREQ_CNTRL to 0x%x\n",
981 i915->display.audio.freq_cntrl);
982 }
983
984 /* Force CDCLK to 2*BCLK as long as we need audio powered. */
985 if (IS_GEMINILAKE(i915))
986 glk_force_audio_cdclk(i915, true);
987
988 if (DISPLAY_VER(i915) >= 10)
989 intel_de_rmw(i915, AUD_PIN_BUF_CTL,
990 0, AUD_PIN_BUF_ENABLE);
991 }
992
993 return ret;
994}
995
996static void i915_audio_component_put_power(struct device *kdev,
997 unsigned long cookie)
998{
999 struct drm_i915_private *i915 = kdev_to_i915(kdev);
1000
1001 /* Stop forcing CDCLK to 2*BCLK if no need for audio to be powered. */
1002 if (--i915->display.audio.power_refcount == 0)
1003 if (IS_GEMINILAKE(i915))
1004 glk_force_audio_cdclk(i915, false);
1005
1006 intel_display_power_put(i915, POWER_DOMAIN_AUDIO_PLAYBACK, cookie);
1007}
1008
1009static void i915_audio_component_codec_wake_override(struct device *kdev,
1010 bool enable)
1011{
1012 struct drm_i915_private *i915 = kdev_to_i915(kdev);
1013 unsigned long cookie;
1014
1015 if (DISPLAY_VER(i915) < 9)
1016 return;
1017
1018 cookie = i915_audio_component_get_power(kdev);
1019
1020 /*
1021 * Enable/disable generating the codec wake signal, overriding the
1022 * internal logic to generate the codec wake to controller.
1023 */
1024 intel_de_rmw(i915, HSW_AUD_CHICKENBIT,
1025 SKL_AUD_CODEC_WAKE_SIGNAL, 0);
1026 usleep_range(1000, 1500);
1027
1028 if (enable) {
1029 intel_de_rmw(i915, HSW_AUD_CHICKENBIT,
1030 0, SKL_AUD_CODEC_WAKE_SIGNAL);
1031 usleep_range(1000, 1500);
1032 }
1033
1034 i915_audio_component_put_power(kdev, cookie);
1035}
1036
1037/* Get CDCLK in kHz */
1038static int i915_audio_component_get_cdclk_freq(struct device *kdev)
1039{
1040 struct drm_i915_private *i915 = kdev_to_i915(kdev);
1041
1042 if (drm_WARN_ON_ONCE(&i915->drm, !HAS_DDI(i915)))
1043 return -ENODEV;
1044
1045 return i915->display.cdclk.hw.cdclk;
1046}
1047
1048/*
1049 * get the intel audio state according to the parameter port and cpu_transcoder
1050 * MST & (cpu_transcoder >= 0): return the audio.state[cpu_transcoder].encoder],
1051 * when port is matched
1052 * MST & (cpu_transcoder < 0): this is invalid
1053 * Non-MST & (cpu_transcoder >= 0): only cpu_transcoder = 0 (the first device entry)
1054 * will get the right intel_encoder with port matched
1055 * Non-MST & (cpu_transcoder < 0): get the right intel_encoder with port matched
1056 */
1057static struct intel_audio_state *find_audio_state(struct drm_i915_private *i915,
1058 int port, int cpu_transcoder)
1059{
1060 /* MST */
1061 if (cpu_transcoder >= 0) {
1062 struct intel_audio_state *audio_state;
1063 struct intel_encoder *encoder;
1064
1065 if (drm_WARN_ON(&i915->drm,
1066 cpu_transcoder >= ARRAY_SIZE(i915->display.audio.state)))
1067 return NULL;
1068
1069 audio_state = &i915->display.audio.state[cpu_transcoder];
1070 encoder = audio_state->encoder;
1071
1072 if (encoder && encoder->port == port &&
1073 encoder->type == INTEL_OUTPUT_DP_MST)
1074 return audio_state;
1075 }
1076
1077 /* Non-MST */
1078 if (cpu_transcoder > 0)
1079 return NULL;
1080
1081 for_each_cpu_transcoder(i915, cpu_transcoder) {
1082 struct intel_audio_state *audio_state;
1083 struct intel_encoder *encoder;
1084
1085 audio_state = &i915->display.audio.state[cpu_transcoder];
1086 encoder = audio_state->encoder;
1087
1088 if (encoder && encoder->port == port &&
1089 encoder->type != INTEL_OUTPUT_DP_MST)
1090 return audio_state;
1091 }
1092
1093 return NULL;
1094}
1095
1096static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
1097 int cpu_transcoder, int rate)
1098{
1099 struct drm_i915_private *i915 = kdev_to_i915(kdev);
1100 struct i915_audio_component *acomp = i915->display.audio.component;
1101 const struct intel_audio_state *audio_state;
1102 struct intel_encoder *encoder;
1103 struct intel_crtc *crtc;
1104 unsigned long cookie;
1105 int err = 0;
1106
1107 if (!HAS_DDI(i915))
1108 return 0;
1109
1110 cookie = i915_audio_component_get_power(kdev);
1111 mutex_lock(&i915->display.audio.mutex);
1112
1113 audio_state = find_audio_state(i915, port, cpu_transcoder);
1114 if (!audio_state) {
1115 drm_dbg_kms(&i915->drm, "Not valid for port %c\n", port_name(port));
1116 err = -ENODEV;
1117 goto unlock;
1118 }
1119
1120 encoder = audio_state->encoder;
1121
1122 /* FIXME stop using the legacy crtc pointer */
1123 crtc = to_intel_crtc(encoder->base.crtc);
1124
1125 /* port must be valid now, otherwise the cpu_transcoder will be invalid */
1126 acomp->aud_sample_rate[port] = rate;
1127
1128 /* FIXME get rid of the crtc->config stuff */
1129 hsw_audio_config_update(encoder, crtc->config);
1130
1131 unlock:
1132 mutex_unlock(&i915->display.audio.mutex);
1133 i915_audio_component_put_power(kdev, cookie);
1134 return err;
1135}
1136
1137static int i915_audio_component_get_eld(struct device *kdev, int port,
1138 int cpu_transcoder, bool *enabled,
1139 unsigned char *buf, int max_bytes)
1140{
1141 struct drm_i915_private *i915 = kdev_to_i915(kdev);
1142 const struct intel_audio_state *audio_state;
1143 int ret = 0;
1144
1145 mutex_lock(&i915->display.audio.mutex);
1146
1147 audio_state = find_audio_state(i915, port, cpu_transcoder);
1148 if (!audio_state) {
1149 drm_dbg_kms(&i915->drm, "Not valid for port %c\n", port_name(port));
1150 mutex_unlock(&i915->display.audio.mutex);
1151 return -EINVAL;
1152 }
1153
1154 *enabled = audio_state->encoder != NULL;
1155 if (*enabled) {
1156 const u8 *eld = audio_state->eld;
1157
1158 ret = drm_eld_size(eld);
1159 memcpy(buf, eld, min(max_bytes, ret));
1160 }
1161
1162 mutex_unlock(&i915->display.audio.mutex);
1163 return ret;
1164}
1165
1166static const struct drm_audio_component_ops i915_audio_component_ops = {
1167 .owner = THIS_MODULE,
1168 .get_power = i915_audio_component_get_power,
1169 .put_power = i915_audio_component_put_power,
1170 .codec_wake_override = i915_audio_component_codec_wake_override,
1171 .get_cdclk_freq = i915_audio_component_get_cdclk_freq,
1172 .sync_audio_rate = i915_audio_component_sync_audio_rate,
1173 .get_eld = i915_audio_component_get_eld,
1174};
1175
1176static int i915_audio_component_bind(struct device *i915_kdev,
1177 struct device *hda_kdev, void *data)
1178{
1179 struct i915_audio_component *acomp = data;
1180 struct drm_i915_private *i915 = kdev_to_i915(i915_kdev);
1181 int i;
1182
1183 if (drm_WARN_ON(&i915->drm, acomp->base.ops || acomp->base.dev))
1184 return -EEXIST;
1185
1186 if (drm_WARN_ON(&i915->drm,
1187 !device_link_add(hda_kdev, i915_kdev,
1188 DL_FLAG_STATELESS)))
1189 return -ENOMEM;
1190
1191 drm_modeset_lock_all(&i915->drm);
1192 acomp->base.ops = &i915_audio_component_ops;
1193 acomp->base.dev = i915_kdev;
1194 BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
1195 for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
1196 acomp->aud_sample_rate[i] = 0;
1197 i915->display.audio.component = acomp;
1198 drm_modeset_unlock_all(&i915->drm);
1199
1200 return 0;
1201}
1202
1203static void i915_audio_component_unbind(struct device *i915_kdev,
1204 struct device *hda_kdev, void *data)
1205{
1206 struct i915_audio_component *acomp = data;
1207 struct drm_i915_private *i915 = kdev_to_i915(i915_kdev);
1208
1209 drm_modeset_lock_all(&i915->drm);
1210 acomp->base.ops = NULL;
1211 acomp->base.dev = NULL;
1212 i915->display.audio.component = NULL;
1213 drm_modeset_unlock_all(&i915->drm);
1214
1215 device_link_remove(hda_kdev, i915_kdev);
1216
1217 if (i915->display.audio.power_refcount)
1218 drm_err(&i915->drm, "audio power refcount %d after unbind\n",
1219 i915->display.audio.power_refcount);
1220}
1221
1222static const struct component_ops i915_audio_component_bind_ops = {
1223 .bind = i915_audio_component_bind,
1224 .unbind = i915_audio_component_unbind,
1225};
1226
1227#define AUD_FREQ_TMODE_SHIFT 14
1228#define AUD_FREQ_4T 0
1229#define AUD_FREQ_8T (2 << AUD_FREQ_TMODE_SHIFT)
1230#define AUD_FREQ_PULLCLKS(x) (((x) & 0x3) << 11)
1231#define AUD_FREQ_BCLK_96M BIT(4)
1232
1233#define AUD_FREQ_GEN12 (AUD_FREQ_8T | AUD_FREQ_PULLCLKS(0) | AUD_FREQ_BCLK_96M)
1234#define AUD_FREQ_TGL_BROKEN (AUD_FREQ_8T | AUD_FREQ_PULLCLKS(2) | AUD_FREQ_BCLK_96M)
1235
1236/**
1237 * i915_audio_component_init - initialize and register the audio component
1238 * @i915: i915 device instance
1239 *
1240 * This will register with the component framework a child component which
1241 * will bind dynamically to the snd_hda_intel driver's corresponding master
1242 * component when the latter is registered. During binding the child
1243 * initializes an instance of struct i915_audio_component which it receives
1244 * from the master. The master can then start to use the interface defined by
1245 * this struct. Each side can break the binding at any point by deregistering
1246 * its own component after which each side's component unbind callback is
1247 * called.
1248 *
1249 * We ignore any error during registration and continue with reduced
1250 * functionality (i.e. without HDMI audio).
1251 */
1252static void i915_audio_component_init(struct drm_i915_private *i915)
1253{
1254 u32 aud_freq, aud_freq_init;
1255 int ret;
1256
1257 ret = component_add_typed(i915->drm.dev,
1258 &i915_audio_component_bind_ops,
1259 I915_COMPONENT_AUDIO);
1260 if (ret < 0) {
1261 drm_err(&i915->drm,
1262 "failed to add audio component (%d)\n", ret);
1263 /* continue with reduced functionality */
1264 return;
1265 }
1266
1267 if (DISPLAY_VER(i915) >= 9) {
1268 aud_freq_init = intel_de_read(i915, AUD_FREQ_CNTRL);
1269
1270 if (DISPLAY_VER(i915) >= 12)
1271 aud_freq = AUD_FREQ_GEN12;
1272 else
1273 aud_freq = aud_freq_init;
1274
1275 /* use BIOS provided value for TGL and RKL unless it is a known bad value */
1276 if ((IS_TIGERLAKE(i915) || IS_ROCKETLAKE(i915)) &&
1277 aud_freq_init != AUD_FREQ_TGL_BROKEN)
1278 aud_freq = aud_freq_init;
1279
1280 drm_dbg_kms(&i915->drm, "use AUD_FREQ_CNTRL of 0x%x (init value 0x%x)\n",
1281 aud_freq, aud_freq_init);
1282
1283 i915->display.audio.freq_cntrl = aud_freq;
1284 }
1285
1286 /* init with current cdclk */
1287 intel_audio_cdclk_change_post(i915);
1288
1289 i915->display.audio.component_registered = true;
1290}
1291
1292/**
1293 * i915_audio_component_cleanup - deregister the audio component
1294 * @i915: i915 device instance
1295 *
1296 * Deregisters the audio component, breaking any existing binding to the
1297 * corresponding snd_hda_intel driver's master component.
1298 */
1299static void i915_audio_component_cleanup(struct drm_i915_private *i915)
1300{
1301 if (!i915->display.audio.component_registered)
1302 return;
1303
1304 component_del(i915->drm.dev, &i915_audio_component_bind_ops);
1305 i915->display.audio.component_registered = false;
1306}
1307
1308/**
1309 * intel_audio_init() - Initialize the audio driver either using
1310 * component framework or using lpe audio bridge
1311 * @i915: the i915 drm device private data
1312 *
1313 */
1314void intel_audio_init(struct drm_i915_private *i915)
1315{
1316 if (intel_lpe_audio_init(i915) < 0)
1317 i915_audio_component_init(i915);
1318}
1319
1320/**
1321 * intel_audio_deinit() - deinitialize the audio driver
1322 * @i915: the i915 drm device private data
1323 *
1324 */
1325void intel_audio_deinit(struct drm_i915_private *i915)
1326{
1327 if (i915->display.audio.lpe.platdev != NULL)
1328 intel_lpe_audio_teardown(i915);
1329 else
1330 i915_audio_component_cleanup(i915);
1331}