1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * intel_hdmi_audio.c - Intel HDMI audio driver |
4 | * |
5 | * Copyright (C) 2016 Intel Corp |
6 | * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com> |
7 | * Ramesh Babu K V <ramesh.babu@intel.com> |
8 | * Vaibhav Agarwal <vaibhav.agarwal@intel.com> |
9 | * Jerome Anand <jerome.anand@intel.com> |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
11 | * |
12 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
13 | * ALSA driver for Intel HDMI audio |
14 | */ |
15 | |
16 | #include <linux/types.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/io.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/module.h> |
21 | #include <linux/interrupt.h> |
22 | #include <linux/pm_runtime.h> |
23 | #include <linux/dma-mapping.h> |
24 | #include <linux/delay.h> |
25 | #include <sound/core.h> |
26 | #include <sound/asoundef.h> |
27 | #include <sound/pcm.h> |
28 | #include <sound/pcm_params.h> |
29 | #include <sound/initval.h> |
30 | #include <sound/control.h> |
31 | #include <sound/jack.h> |
32 | #include <drm/drm_edid.h> |
33 | #include <drm/intel_lpe_audio.h> |
34 | #include "intel_hdmi_audio.h" |
35 | |
36 | #define INTEL_HDMI_AUDIO_SUSPEND_DELAY_MS 5000 |
37 | |
38 | #define for_each_pipe(card_ctx, pipe) \ |
39 | for ((pipe) = 0; (pipe) < (card_ctx)->num_pipes; (pipe)++) |
40 | #define for_each_port(card_ctx, port) \ |
41 | for ((port) = 0; (port) < (card_ctx)->num_ports; (port)++) |
42 | |
43 | /*standard module options for ALSA. This module supports only one card*/ |
44 | static int hdmi_card_index = SNDRV_DEFAULT_IDX1; |
45 | static char *hdmi_card_id = SNDRV_DEFAULT_STR1; |
46 | static bool single_port; |
47 | |
48 | module_param_named(index, hdmi_card_index, int, 0444); |
49 | MODULE_PARM_DESC(index, |
50 | "Index value for INTEL Intel HDMI Audio controller." ); |
51 | module_param_named(id, hdmi_card_id, charp, 0444); |
52 | MODULE_PARM_DESC(id, |
53 | "ID string for INTEL Intel HDMI Audio controller." ); |
54 | module_param(single_port, bool, 0444); |
55 | MODULE_PARM_DESC(single_port, |
56 | "Single-port mode (for compatibility)" ); |
57 | |
58 | /* |
59 | * ELD SA bits in the CEA Speaker Allocation data block |
60 | */ |
61 | static const int eld_speaker_allocation_bits[] = { |
62 | [0] = FL | FR, |
63 | [1] = LFE, |
64 | [2] = FC, |
65 | [3] = RL | RR, |
66 | [4] = RC, |
67 | [5] = FLC | FRC, |
68 | [6] = RLC | RRC, |
69 | /* the following are not defined in ELD yet */ |
70 | [7] = 0, |
71 | }; |
72 | |
73 | /* |
74 | * This is an ordered list! |
75 | * |
76 | * The preceding ones have better chances to be selected by |
77 | * hdmi_channel_allocation(). |
78 | */ |
79 | static struct cea_channel_speaker_allocation channel_allocations[] = { |
80 | /* channel: 7 6 5 4 3 2 1 0 */ |
81 | { .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } }, |
82 | /* 2.1 */ |
83 | { .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } }, |
84 | /* Dolby Surround */ |
85 | { .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } }, |
86 | /* surround40 */ |
87 | { .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } }, |
88 | /* surround41 */ |
89 | { .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } }, |
90 | /* surround50 */ |
91 | { .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } }, |
92 | /* surround51 */ |
93 | { .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } }, |
94 | /* 6.1 */ |
95 | { .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } }, |
96 | /* surround71 */ |
97 | { .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } }, |
98 | |
99 | { .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } }, |
100 | { .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } }, |
101 | { .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } }, |
102 | { .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } }, |
103 | { .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } }, |
104 | { .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } }, |
105 | { .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } }, |
106 | { .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } }, |
107 | { .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } }, |
108 | { .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } }, |
109 | { .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } }, |
110 | { .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } }, |
111 | { .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } }, |
112 | { .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } }, |
113 | { .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } }, |
114 | { .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } }, |
115 | { .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } }, |
116 | { .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } }, |
117 | { .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } }, |
118 | { .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } }, |
119 | { .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } }, |
120 | { .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } }, |
121 | { .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } }, |
122 | }; |
123 | |
124 | static const struct channel_map_table map_tables[] = { |
125 | { SNDRV_CHMAP_FL, 0x00, FL }, |
126 | { SNDRV_CHMAP_FR, 0x01, FR }, |
127 | { SNDRV_CHMAP_RL, 0x04, RL }, |
128 | { SNDRV_CHMAP_RR, 0x05, RR }, |
129 | { SNDRV_CHMAP_LFE, 0x02, LFE }, |
130 | { SNDRV_CHMAP_FC, 0x03, FC }, |
131 | { SNDRV_CHMAP_RLC, 0x06, RLC }, |
132 | { SNDRV_CHMAP_RRC, 0x07, RRC }, |
133 | {} /* terminator */ |
134 | }; |
135 | |
136 | /* hardware capability structure */ |
137 | static const struct snd_pcm_hardware had_pcm_hardware = { |
138 | .info = (SNDRV_PCM_INFO_INTERLEAVED | |
139 | SNDRV_PCM_INFO_MMAP | |
140 | SNDRV_PCM_INFO_MMAP_VALID | |
141 | SNDRV_PCM_INFO_NO_PERIOD_WAKEUP), |
142 | .formats = (SNDRV_PCM_FMTBIT_S16_LE | |
143 | SNDRV_PCM_FMTBIT_S24_LE | |
144 | SNDRV_PCM_FMTBIT_S32_LE), |
145 | .rates = SNDRV_PCM_RATE_32000 | |
146 | SNDRV_PCM_RATE_44100 | |
147 | SNDRV_PCM_RATE_48000 | |
148 | SNDRV_PCM_RATE_88200 | |
149 | SNDRV_PCM_RATE_96000 | |
150 | SNDRV_PCM_RATE_176400 | |
151 | SNDRV_PCM_RATE_192000, |
152 | .rate_min = HAD_MIN_RATE, |
153 | .rate_max = HAD_MAX_RATE, |
154 | .channels_min = HAD_MIN_CHANNEL, |
155 | .channels_max = HAD_MAX_CHANNEL, |
156 | .buffer_bytes_max = HAD_MAX_BUFFER, |
157 | .period_bytes_min = HAD_MIN_PERIOD_BYTES, |
158 | .period_bytes_max = HAD_MAX_PERIOD_BYTES, |
159 | .periods_min = HAD_MIN_PERIODS, |
160 | .periods_max = HAD_MAX_PERIODS, |
161 | .fifo_size = HAD_FIFO_SIZE, |
162 | }; |
163 | |
164 | /* Get the active PCM substream; |
165 | * Call had_substream_put() for unreferecing. |
166 | * Don't call this inside had_spinlock, as it takes by itself |
167 | */ |
168 | static struct snd_pcm_substream * |
169 | had_substream_get(struct snd_intelhad *intelhaddata) |
170 | { |
171 | struct snd_pcm_substream *substream; |
172 | unsigned long flags; |
173 | |
174 | spin_lock_irqsave(&intelhaddata->had_spinlock, flags); |
175 | substream = intelhaddata->stream_info.substream; |
176 | if (substream) |
177 | intelhaddata->stream_info.substream_refcount++; |
178 | spin_unlock_irqrestore(lock: &intelhaddata->had_spinlock, flags); |
179 | return substream; |
180 | } |
181 | |
182 | /* Unref the active PCM substream; |
183 | * Don't call this inside had_spinlock, as it takes by itself |
184 | */ |
185 | static void had_substream_put(struct snd_intelhad *intelhaddata) |
186 | { |
187 | unsigned long flags; |
188 | |
189 | spin_lock_irqsave(&intelhaddata->had_spinlock, flags); |
190 | intelhaddata->stream_info.substream_refcount--; |
191 | spin_unlock_irqrestore(lock: &intelhaddata->had_spinlock, flags); |
192 | } |
193 | |
194 | static u32 had_config_offset(int pipe) |
195 | { |
196 | switch (pipe) { |
197 | default: |
198 | case 0: |
199 | return AUDIO_HDMI_CONFIG_A; |
200 | case 1: |
201 | return AUDIO_HDMI_CONFIG_B; |
202 | case 2: |
203 | return AUDIO_HDMI_CONFIG_C; |
204 | } |
205 | } |
206 | |
207 | /* Register access functions */ |
208 | static u32 had_read_register_raw(struct snd_intelhad_card *card_ctx, |
209 | int pipe, u32 reg) |
210 | { |
211 | return ioread32(card_ctx->mmio_start + had_config_offset(pipe) + reg); |
212 | } |
213 | |
214 | static void had_write_register_raw(struct snd_intelhad_card *card_ctx, |
215 | int pipe, u32 reg, u32 val) |
216 | { |
217 | iowrite32(val, card_ctx->mmio_start + had_config_offset(pipe) + reg); |
218 | } |
219 | |
220 | static void had_read_register(struct snd_intelhad *ctx, u32 reg, u32 *val) |
221 | { |
222 | if (!ctx->connected) |
223 | *val = 0; |
224 | else |
225 | *val = had_read_register_raw(card_ctx: ctx->card_ctx, pipe: ctx->pipe, reg); |
226 | } |
227 | |
228 | static void had_write_register(struct snd_intelhad *ctx, u32 reg, u32 val) |
229 | { |
230 | if (ctx->connected) |
231 | had_write_register_raw(card_ctx: ctx->card_ctx, pipe: ctx->pipe, reg, val); |
232 | } |
233 | |
234 | /* |
235 | * enable / disable audio configuration |
236 | * |
237 | * The normal read/modify should not directly be used on VLV2 for |
238 | * updating AUD_CONFIG register. |
239 | * This is because: |
240 | * Bit6 of AUD_CONFIG register is writeonly due to a silicon bug on VLV2 |
241 | * HDMI IP. As a result a read-modify of AUD_CONFIG register will always |
242 | * clear bit6. AUD_CONFIG[6:4] represents the "channels" field of the |
243 | * register. This field should be 1xy binary for configuration with 6 or |
244 | * more channels. Read-modify of AUD_CONFIG (Eg. for enabling audio) |
245 | * causes the "channels" field to be updated as 0xy binary resulting in |
246 | * bad audio. The fix is to always write the AUD_CONFIG[6:4] with |
247 | * appropriate value when doing read-modify of AUD_CONFIG register. |
248 | */ |
249 | static void had_enable_audio(struct snd_intelhad *intelhaddata, |
250 | bool enable) |
251 | { |
252 | /* update the cached value */ |
253 | intelhaddata->aud_config.regx.aud_en = enable; |
254 | had_write_register(ctx: intelhaddata, reg: AUD_CONFIG, |
255 | val: intelhaddata->aud_config.regval); |
256 | } |
257 | |
258 | /* forcibly ACKs to both BUFFER_DONE and BUFFER_UNDERRUN interrupts */ |
259 | static void had_ack_irqs(struct snd_intelhad *ctx) |
260 | { |
261 | u32 status_reg; |
262 | |
263 | if (!ctx->connected) |
264 | return; |
265 | had_read_register(ctx, reg: AUD_HDMI_STATUS, val: &status_reg); |
266 | status_reg |= HDMI_AUDIO_BUFFER_DONE | HDMI_AUDIO_UNDERRUN; |
267 | had_write_register(ctx, reg: AUD_HDMI_STATUS, val: status_reg); |
268 | had_read_register(ctx, reg: AUD_HDMI_STATUS, val: &status_reg); |
269 | } |
270 | |
271 | /* Reset buffer pointers */ |
272 | static void had_reset_audio(struct snd_intelhad *intelhaddata) |
273 | { |
274 | had_write_register(ctx: intelhaddata, reg: AUD_HDMI_STATUS, |
275 | AUD_HDMI_STATUSG_MASK_FUNCRST); |
276 | had_write_register(ctx: intelhaddata, reg: AUD_HDMI_STATUS, val: 0); |
277 | } |
278 | |
279 | /* |
280 | * initialize audio channel status registers |
281 | * This function is called in the prepare callback |
282 | */ |
283 | static int had_prog_status_reg(struct snd_pcm_substream *substream, |
284 | struct snd_intelhad *intelhaddata) |
285 | { |
286 | union aud_ch_status_0 ch_stat0 = {.regval = 0}; |
287 | union aud_ch_status_1 ch_stat1 = {.regval = 0}; |
288 | |
289 | ch_stat0.regx.lpcm_id = (intelhaddata->aes_bits & |
290 | IEC958_AES0_NONAUDIO) >> 1; |
291 | ch_stat0.regx.clk_acc = (intelhaddata->aes_bits & |
292 | IEC958_AES3_CON_CLOCK) >> 4; |
293 | |
294 | switch (substream->runtime->rate) { |
295 | case AUD_SAMPLE_RATE_32: |
296 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_32KHZ; |
297 | break; |
298 | |
299 | case AUD_SAMPLE_RATE_44_1: |
300 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_44KHZ; |
301 | break; |
302 | case AUD_SAMPLE_RATE_48: |
303 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_48KHZ; |
304 | break; |
305 | case AUD_SAMPLE_RATE_88_2: |
306 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_88KHZ; |
307 | break; |
308 | case AUD_SAMPLE_RATE_96: |
309 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_96KHZ; |
310 | break; |
311 | case AUD_SAMPLE_RATE_176_4: |
312 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_176KHZ; |
313 | break; |
314 | case AUD_SAMPLE_RATE_192: |
315 | ch_stat0.regx.samp_freq = CH_STATUS_MAP_192KHZ; |
316 | break; |
317 | |
318 | default: |
319 | /* control should never come here */ |
320 | return -EINVAL; |
321 | } |
322 | |
323 | had_write_register(ctx: intelhaddata, |
324 | reg: AUD_CH_STATUS_0, val: ch_stat0.regval); |
325 | |
326 | switch (substream->runtime->format) { |
327 | case SNDRV_PCM_FORMAT_S16_LE: |
328 | ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_20; |
329 | ch_stat1.regx.wrd_len = SMPL_WIDTH_16BITS; |
330 | break; |
331 | case SNDRV_PCM_FORMAT_S24_LE: |
332 | case SNDRV_PCM_FORMAT_S32_LE: |
333 | ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_24; |
334 | ch_stat1.regx.wrd_len = SMPL_WIDTH_24BITS; |
335 | break; |
336 | default: |
337 | return -EINVAL; |
338 | } |
339 | |
340 | had_write_register(ctx: intelhaddata, |
341 | reg: AUD_CH_STATUS_1, val: ch_stat1.regval); |
342 | return 0; |
343 | } |
344 | |
345 | /* |
346 | * function to initialize audio |
347 | * registers and buffer configuration registers |
348 | * This function is called in the prepare callback |
349 | */ |
350 | static int had_init_audio_ctrl(struct snd_pcm_substream *substream, |
351 | struct snd_intelhad *intelhaddata) |
352 | { |
353 | union aud_cfg cfg_val = {.regval = 0}; |
354 | union aud_buf_config buf_cfg = {.regval = 0}; |
355 | u8 channels; |
356 | |
357 | had_prog_status_reg(substream, intelhaddata); |
358 | |
359 | buf_cfg.regx.audio_fifo_watermark = FIFO_THRESHOLD; |
360 | buf_cfg.regx.dma_fifo_watermark = DMA_FIFO_THRESHOLD; |
361 | buf_cfg.regx.aud_delay = 0; |
362 | had_write_register(ctx: intelhaddata, reg: AUD_BUF_CONFIG, val: buf_cfg.regval); |
363 | |
364 | channels = substream->runtime->channels; |
365 | cfg_val.regx.num_ch = channels - 2; |
366 | if (channels <= 2) |
367 | cfg_val.regx.layout = LAYOUT0; |
368 | else |
369 | cfg_val.regx.layout = LAYOUT1; |
370 | |
371 | if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE) |
372 | cfg_val.regx.packet_mode = 1; |
373 | |
374 | if (substream->runtime->format == SNDRV_PCM_FORMAT_S32_LE) |
375 | cfg_val.regx.left_align = 1; |
376 | |
377 | cfg_val.regx.val_bit = 1; |
378 | |
379 | /* fix up the DP bits */ |
380 | if (intelhaddata->dp_output) { |
381 | cfg_val.regx.dp_modei = 1; |
382 | cfg_val.regx.set = 1; |
383 | } |
384 | |
385 | had_write_register(ctx: intelhaddata, reg: AUD_CONFIG, val: cfg_val.regval); |
386 | intelhaddata->aud_config = cfg_val; |
387 | return 0; |
388 | } |
389 | |
390 | /* |
391 | * Compute derived values in channel_allocations[]. |
392 | */ |
393 | static void init_channel_allocations(void) |
394 | { |
395 | int i, j; |
396 | struct cea_channel_speaker_allocation *p; |
397 | |
398 | for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
399 | p = channel_allocations + i; |
400 | p->channels = 0; |
401 | p->spk_mask = 0; |
402 | for (j = 0; j < ARRAY_SIZE(p->speakers); j++) |
403 | if (p->speakers[j]) { |
404 | p->channels++; |
405 | p->spk_mask |= p->speakers[j]; |
406 | } |
407 | } |
408 | } |
409 | |
410 | /* |
411 | * The transformation takes two steps: |
412 | * |
413 | * eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask |
414 | * spk_mask => (channel_allocations[]) => ai->CA |
415 | * |
416 | * TODO: it could select the wrong CA from multiple candidates. |
417 | */ |
418 | static int had_channel_allocation(struct snd_intelhad *intelhaddata, |
419 | int channels) |
420 | { |
421 | int i; |
422 | int ca = 0; |
423 | int spk_mask = 0; |
424 | |
425 | /* |
426 | * CA defaults to 0 for basic stereo audio |
427 | */ |
428 | if (channels <= 2) |
429 | return 0; |
430 | |
431 | /* |
432 | * expand ELD's speaker allocation mask |
433 | * |
434 | * ELD tells the speaker mask in a compact(paired) form, |
435 | * expand ELD's notions to match the ones used by Audio InfoFrame. |
436 | */ |
437 | |
438 | for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { |
439 | if (intelhaddata->eld[DRM_ELD_SPEAKER] & (1 << i)) |
440 | spk_mask |= eld_speaker_allocation_bits[i]; |
441 | } |
442 | |
443 | /* search for the first working match in the CA table */ |
444 | for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
445 | if (channels == channel_allocations[i].channels && |
446 | (spk_mask & channel_allocations[i].spk_mask) == |
447 | channel_allocations[i].spk_mask) { |
448 | ca = channel_allocations[i].ca_index; |
449 | break; |
450 | } |
451 | } |
452 | |
453 | dev_dbg(intelhaddata->dev, "select CA 0x%x for %d\n" , ca, channels); |
454 | |
455 | return ca; |
456 | } |
457 | |
458 | /* from speaker bit mask to ALSA API channel position */ |
459 | static int spk_to_chmap(int spk) |
460 | { |
461 | const struct channel_map_table *t = map_tables; |
462 | |
463 | for (; t->map; t++) { |
464 | if (t->spk_mask == spk) |
465 | return t->map; |
466 | } |
467 | return 0; |
468 | } |
469 | |
470 | static void had_build_channel_allocation_map(struct snd_intelhad *intelhaddata) |
471 | { |
472 | int i, c; |
473 | int spk_mask = 0; |
474 | struct snd_pcm_chmap_elem *chmap; |
475 | u8 eld_high, eld_high_mask = 0xF0; |
476 | u8 high_msb; |
477 | |
478 | kfree(objp: intelhaddata->chmap->chmap); |
479 | intelhaddata->chmap->chmap = NULL; |
480 | |
481 | chmap = kzalloc(size: sizeof(*chmap), GFP_KERNEL); |
482 | if (!chmap) |
483 | return; |
484 | |
485 | dev_dbg(intelhaddata->dev, "eld speaker = %x\n" , |
486 | intelhaddata->eld[DRM_ELD_SPEAKER]); |
487 | |
488 | /* WA: Fix the max channel supported to 8 */ |
489 | |
490 | /* |
491 | * Sink may support more than 8 channels, if eld_high has more than |
492 | * one bit set. SOC supports max 8 channels. |
493 | * Refer eld_speaker_allocation_bits, for sink speaker allocation |
494 | */ |
495 | |
496 | /* if 0x2F < eld < 0x4F fall back to 0x2f, else fall back to 0x4F */ |
497 | eld_high = intelhaddata->eld[DRM_ELD_SPEAKER] & eld_high_mask; |
498 | if ((eld_high & (eld_high-1)) && (eld_high > 0x1F)) { |
499 | /* eld_high & (eld_high-1): if more than 1 bit set */ |
500 | /* 0x1F: 7 channels */ |
501 | for (i = 1; i < 4; i++) { |
502 | high_msb = eld_high & (0x80 >> i); |
503 | if (high_msb) { |
504 | intelhaddata->eld[DRM_ELD_SPEAKER] &= |
505 | high_msb | 0xF; |
506 | break; |
507 | } |
508 | } |
509 | } |
510 | |
511 | for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { |
512 | if (intelhaddata->eld[DRM_ELD_SPEAKER] & (1 << i)) |
513 | spk_mask |= eld_speaker_allocation_bits[i]; |
514 | } |
515 | |
516 | for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
517 | if (spk_mask == channel_allocations[i].spk_mask) { |
518 | for (c = 0; c < channel_allocations[i].channels; c++) { |
519 | chmap->map[c] = spk_to_chmap( |
520 | spk: channel_allocations[i].speakers[ |
521 | (MAX_SPEAKERS - 1) - c]); |
522 | } |
523 | chmap->channels = channel_allocations[i].channels; |
524 | intelhaddata->chmap->chmap = chmap; |
525 | break; |
526 | } |
527 | } |
528 | if (i >= ARRAY_SIZE(channel_allocations)) |
529 | kfree(objp: chmap); |
530 | } |
531 | |
532 | /* |
533 | * ALSA API channel-map control callbacks |
534 | */ |
535 | static int had_chmap_ctl_info(struct snd_kcontrol *kcontrol, |
536 | struct snd_ctl_elem_info *uinfo) |
537 | { |
538 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
539 | uinfo->count = HAD_MAX_CHANNEL; |
540 | uinfo->value.integer.min = 0; |
541 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; |
542 | return 0; |
543 | } |
544 | |
545 | static int had_chmap_ctl_get(struct snd_kcontrol *kcontrol, |
546 | struct snd_ctl_elem_value *ucontrol) |
547 | { |
548 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
549 | struct snd_intelhad *intelhaddata = info->private_data; |
550 | int i; |
551 | const struct snd_pcm_chmap_elem *chmap; |
552 | |
553 | memset(ucontrol->value.integer.value, 0, |
554 | sizeof(long) * HAD_MAX_CHANNEL); |
555 | mutex_lock(&intelhaddata->mutex); |
556 | if (!intelhaddata->chmap->chmap) { |
557 | mutex_unlock(lock: &intelhaddata->mutex); |
558 | return 0; |
559 | } |
560 | |
561 | chmap = intelhaddata->chmap->chmap; |
562 | for (i = 0; i < chmap->channels; i++) |
563 | ucontrol->value.integer.value[i] = chmap->map[i]; |
564 | mutex_unlock(lock: &intelhaddata->mutex); |
565 | |
566 | return 0; |
567 | } |
568 | |
569 | static int had_register_chmap_ctls(struct snd_intelhad *intelhaddata, |
570 | struct snd_pcm *pcm) |
571 | { |
572 | int err; |
573 | |
574 | err = snd_pcm_add_chmap_ctls(pcm, stream: SNDRV_PCM_STREAM_PLAYBACK, |
575 | NULL, max_channels: 0, private_value: (unsigned long)intelhaddata, |
576 | info_ret: &intelhaddata->chmap); |
577 | if (err < 0) |
578 | return err; |
579 | |
580 | intelhaddata->chmap->private_data = intelhaddata; |
581 | intelhaddata->chmap->kctl->info = had_chmap_ctl_info; |
582 | intelhaddata->chmap->kctl->get = had_chmap_ctl_get; |
583 | intelhaddata->chmap->chmap = NULL; |
584 | return 0; |
585 | } |
586 | |
587 | /* |
588 | * Initialize Data Island Packets registers |
589 | * This function is called in the prepare callback |
590 | */ |
591 | static void had_prog_dip(struct snd_pcm_substream *substream, |
592 | struct snd_intelhad *intelhaddata) |
593 | { |
594 | int i; |
595 | union aud_ctrl_st ctrl_state = {.regval = 0}; |
596 | union aud_info_frame2 frame2 = {.regval = 0}; |
597 | union aud_info_frame3 frame3 = {.regval = 0}; |
598 | u8 checksum = 0; |
599 | u32 info_frame; |
600 | int channels; |
601 | int ca; |
602 | |
603 | channels = substream->runtime->channels; |
604 | |
605 | had_write_register(ctx: intelhaddata, reg: AUD_CNTL_ST, val: ctrl_state.regval); |
606 | |
607 | ca = had_channel_allocation(intelhaddata, channels); |
608 | if (intelhaddata->dp_output) { |
609 | info_frame = DP_INFO_FRAME_WORD1; |
610 | frame2.regval = (substream->runtime->channels - 1) | (ca << 24); |
611 | } else { |
612 | info_frame = HDMI_INFO_FRAME_WORD1; |
613 | frame2.regx.chnl_cnt = substream->runtime->channels - 1; |
614 | frame3.regx.chnl_alloc = ca; |
615 | |
616 | /* Calculte the byte wide checksum for all valid DIP words */ |
617 | for (i = 0; i < BYTES_PER_WORD; i++) |
618 | checksum += (info_frame >> (i * 8)) & 0xff; |
619 | for (i = 0; i < BYTES_PER_WORD; i++) |
620 | checksum += (frame2.regval >> (i * 8)) & 0xff; |
621 | for (i = 0; i < BYTES_PER_WORD; i++) |
622 | checksum += (frame3.regval >> (i * 8)) & 0xff; |
623 | |
624 | frame2.regx.chksum = -(checksum); |
625 | } |
626 | |
627 | had_write_register(ctx: intelhaddata, reg: AUD_HDMIW_INFOFR, val: info_frame); |
628 | had_write_register(ctx: intelhaddata, reg: AUD_HDMIW_INFOFR, val: frame2.regval); |
629 | had_write_register(ctx: intelhaddata, reg: AUD_HDMIW_INFOFR, val: frame3.regval); |
630 | |
631 | /* program remaining DIP words with zero */ |
632 | for (i = 0; i < HAD_MAX_DIP_WORDS-VALID_DIP_WORDS; i++) |
633 | had_write_register(ctx: intelhaddata, reg: AUD_HDMIW_INFOFR, val: 0x0); |
634 | |
635 | ctrl_state.regx.dip_freq = 1; |
636 | ctrl_state.regx.dip_en_sta = 1; |
637 | had_write_register(ctx: intelhaddata, reg: AUD_CNTL_ST, val: ctrl_state.regval); |
638 | } |
639 | |
640 | static int had_calculate_maud_value(u32 aud_samp_freq, u32 link_rate) |
641 | { |
642 | u32 maud_val; |
643 | |
644 | /* Select maud according to DP 1.2 spec */ |
645 | if (link_rate == DP_2_7_GHZ) { |
646 | switch (aud_samp_freq) { |
647 | case AUD_SAMPLE_RATE_32: |
648 | maud_val = AUD_SAMPLE_RATE_32_DP_2_7_MAUD_VAL; |
649 | break; |
650 | |
651 | case AUD_SAMPLE_RATE_44_1: |
652 | maud_val = AUD_SAMPLE_RATE_44_1_DP_2_7_MAUD_VAL; |
653 | break; |
654 | |
655 | case AUD_SAMPLE_RATE_48: |
656 | maud_val = AUD_SAMPLE_RATE_48_DP_2_7_MAUD_VAL; |
657 | break; |
658 | |
659 | case AUD_SAMPLE_RATE_88_2: |
660 | maud_val = AUD_SAMPLE_RATE_88_2_DP_2_7_MAUD_VAL; |
661 | break; |
662 | |
663 | case AUD_SAMPLE_RATE_96: |
664 | maud_val = AUD_SAMPLE_RATE_96_DP_2_7_MAUD_VAL; |
665 | break; |
666 | |
667 | case AUD_SAMPLE_RATE_176_4: |
668 | maud_val = AUD_SAMPLE_RATE_176_4_DP_2_7_MAUD_VAL; |
669 | break; |
670 | |
671 | case HAD_MAX_RATE: |
672 | maud_val = HAD_MAX_RATE_DP_2_7_MAUD_VAL; |
673 | break; |
674 | |
675 | default: |
676 | maud_val = -EINVAL; |
677 | break; |
678 | } |
679 | } else if (link_rate == DP_1_62_GHZ) { |
680 | switch (aud_samp_freq) { |
681 | case AUD_SAMPLE_RATE_32: |
682 | maud_val = AUD_SAMPLE_RATE_32_DP_1_62_MAUD_VAL; |
683 | break; |
684 | |
685 | case AUD_SAMPLE_RATE_44_1: |
686 | maud_val = AUD_SAMPLE_RATE_44_1_DP_1_62_MAUD_VAL; |
687 | break; |
688 | |
689 | case AUD_SAMPLE_RATE_48: |
690 | maud_val = AUD_SAMPLE_RATE_48_DP_1_62_MAUD_VAL; |
691 | break; |
692 | |
693 | case AUD_SAMPLE_RATE_88_2: |
694 | maud_val = AUD_SAMPLE_RATE_88_2_DP_1_62_MAUD_VAL; |
695 | break; |
696 | |
697 | case AUD_SAMPLE_RATE_96: |
698 | maud_val = AUD_SAMPLE_RATE_96_DP_1_62_MAUD_VAL; |
699 | break; |
700 | |
701 | case AUD_SAMPLE_RATE_176_4: |
702 | maud_val = AUD_SAMPLE_RATE_176_4_DP_1_62_MAUD_VAL; |
703 | break; |
704 | |
705 | case HAD_MAX_RATE: |
706 | maud_val = HAD_MAX_RATE_DP_1_62_MAUD_VAL; |
707 | break; |
708 | |
709 | default: |
710 | maud_val = -EINVAL; |
711 | break; |
712 | } |
713 | } else |
714 | maud_val = -EINVAL; |
715 | |
716 | return maud_val; |
717 | } |
718 | |
719 | /* |
720 | * Program HDMI audio CTS value |
721 | * |
722 | * @aud_samp_freq: sampling frequency of audio data |
723 | * @tmds: sampling frequency of the display data |
724 | * @link_rate: DP link rate |
725 | * @n_param: N value, depends on aud_samp_freq |
726 | * @intelhaddata: substream private data |
727 | * |
728 | * Program CTS register based on the audio and display sampling frequency |
729 | */ |
730 | static void had_prog_cts(u32 aud_samp_freq, u32 tmds, u32 link_rate, |
731 | u32 n_param, struct snd_intelhad *intelhaddata) |
732 | { |
733 | u32 cts_val; |
734 | u64 dividend, divisor; |
735 | |
736 | if (intelhaddata->dp_output) { |
737 | /* Substitute cts_val with Maud according to DP 1.2 spec*/ |
738 | cts_val = had_calculate_maud_value(aud_samp_freq, link_rate); |
739 | } else { |
740 | /* Calculate CTS according to HDMI 1.3a spec*/ |
741 | dividend = (u64)tmds * n_param*1000; |
742 | divisor = 128 * aud_samp_freq; |
743 | cts_val = div64_u64(dividend, divisor); |
744 | } |
745 | dev_dbg(intelhaddata->dev, "TMDS value=%d, N value=%d, CTS Value=%d\n" , |
746 | tmds, n_param, cts_val); |
747 | had_write_register(ctx: intelhaddata, reg: AUD_HDMI_CTS, val: (BIT(24) | cts_val)); |
748 | } |
749 | |
750 | static int had_calculate_n_value(u32 aud_samp_freq) |
751 | { |
752 | int n_val; |
753 | |
754 | /* Select N according to HDMI 1.3a spec*/ |
755 | switch (aud_samp_freq) { |
756 | case AUD_SAMPLE_RATE_32: |
757 | n_val = 4096; |
758 | break; |
759 | |
760 | case AUD_SAMPLE_RATE_44_1: |
761 | n_val = 6272; |
762 | break; |
763 | |
764 | case AUD_SAMPLE_RATE_48: |
765 | n_val = 6144; |
766 | break; |
767 | |
768 | case AUD_SAMPLE_RATE_88_2: |
769 | n_val = 12544; |
770 | break; |
771 | |
772 | case AUD_SAMPLE_RATE_96: |
773 | n_val = 12288; |
774 | break; |
775 | |
776 | case AUD_SAMPLE_RATE_176_4: |
777 | n_val = 25088; |
778 | break; |
779 | |
780 | case HAD_MAX_RATE: |
781 | n_val = 24576; |
782 | break; |
783 | |
784 | default: |
785 | n_val = -EINVAL; |
786 | break; |
787 | } |
788 | return n_val; |
789 | } |
790 | |
791 | /* |
792 | * Program HDMI audio N value |
793 | * |
794 | * @aud_samp_freq: sampling frequency of audio data |
795 | * @n_param: N value, depends on aud_samp_freq |
796 | * @intelhaddata: substream private data |
797 | * |
798 | * This function is called in the prepare callback. |
799 | * It programs based on the audio and display sampling frequency |
800 | */ |
801 | static int had_prog_n(u32 aud_samp_freq, u32 *n_param, |
802 | struct snd_intelhad *intelhaddata) |
803 | { |
804 | int n_val; |
805 | |
806 | if (intelhaddata->dp_output) { |
807 | /* |
808 | * According to DP specs, Maud and Naud values hold |
809 | * a relationship, which is stated as: |
810 | * Maud/Naud = 512 * fs / f_LS_Clk |
811 | * where, fs is the sampling frequency of the audio stream |
812 | * and Naud is 32768 for Async clock. |
813 | */ |
814 | |
815 | n_val = DP_NAUD_VAL; |
816 | } else |
817 | n_val = had_calculate_n_value(aud_samp_freq); |
818 | |
819 | if (n_val < 0) |
820 | return n_val; |
821 | |
822 | had_write_register(ctx: intelhaddata, reg: AUD_N_ENABLE, val: (BIT(24) | n_val)); |
823 | *n_param = n_val; |
824 | return 0; |
825 | } |
826 | |
827 | /* |
828 | * PCM ring buffer handling |
829 | * |
830 | * The hardware provides a ring buffer with the fixed 4 buffer descriptors |
831 | * (BDs). The driver maps these 4 BDs onto the PCM ring buffer. The mapping |
832 | * moves at each period elapsed. The below illustrates how it works: |
833 | * |
834 | * At time=0 |
835 | * PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1| |
836 | * BD | 0 | 1 | 2 | 3 | |
837 | * |
838 | * At time=1 (period elapsed) |
839 | * PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1| |
840 | * BD | 1 | 2 | 3 | 0 | |
841 | * |
842 | * At time=2 (second period elapsed) |
843 | * PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1| |
844 | * BD | 2 | 3 | 0 | 1 | |
845 | * |
846 | * The bd_head field points to the index of the BD to be read. It's also the |
847 | * position to be filled at next. The pcm_head and the pcm_filled fields |
848 | * point to the indices of the current position and of the next position to |
849 | * be filled, respectively. For PCM buffer there are both _head and _filled |
850 | * because they may be difference when nperiods > 4. For example, in the |
851 | * example above at t=1, bd_head=1 and pcm_head=1 while pcm_filled=5: |
852 | * |
853 | * pcm_head (=1) --v v-- pcm_filled (=5) |
854 | * PCM | 0 | 1 | 2 | 3 | 4 | 5 | .... |n-1| |
855 | * BD | 1 | 2 | 3 | 0 | |
856 | * bd_head (=1) --^ ^-- next to fill (= bd_head) |
857 | * |
858 | * For nperiods < 4, the remaining BDs out of 4 are marked as invalid, so that |
859 | * the hardware skips those BDs in the loop. |
860 | * |
861 | * An exceptional setup is the case with nperiods=1. Since we have to update |
862 | * BDs after finishing one BD processing, we'd need at least two BDs, where |
863 | * both BDs point to the same content, the same address, the same size of the |
864 | * whole PCM buffer. |
865 | */ |
866 | |
867 | #define AUD_BUF_ADDR(x) (AUD_BUF_A_ADDR + (x) * HAD_REG_WIDTH) |
868 | #define AUD_BUF_LEN(x) (AUD_BUF_A_LENGTH + (x) * HAD_REG_WIDTH) |
869 | |
870 | /* Set up a buffer descriptor at the "filled" position */ |
871 | static void had_prog_bd(struct snd_pcm_substream *substream, |
872 | struct snd_intelhad *intelhaddata) |
873 | { |
874 | int idx = intelhaddata->bd_head; |
875 | int ofs = intelhaddata->pcmbuf_filled * intelhaddata->period_bytes; |
876 | u32 addr = substream->runtime->dma_addr + ofs; |
877 | |
878 | addr |= AUD_BUF_VALID; |
879 | if (!substream->runtime->no_period_wakeup) |
880 | addr |= AUD_BUF_INTR_EN; |
881 | had_write_register(ctx: intelhaddata, AUD_BUF_ADDR(idx), val: addr); |
882 | had_write_register(ctx: intelhaddata, AUD_BUF_LEN(idx), |
883 | val: intelhaddata->period_bytes); |
884 | |
885 | /* advance the indices to the next */ |
886 | intelhaddata->bd_head++; |
887 | intelhaddata->bd_head %= intelhaddata->num_bds; |
888 | intelhaddata->pcmbuf_filled++; |
889 | intelhaddata->pcmbuf_filled %= substream->runtime->periods; |
890 | } |
891 | |
892 | /* invalidate a buffer descriptor with the given index */ |
893 | static void had_invalidate_bd(struct snd_intelhad *intelhaddata, |
894 | int idx) |
895 | { |
896 | had_write_register(ctx: intelhaddata, AUD_BUF_ADDR(idx), val: 0); |
897 | had_write_register(ctx: intelhaddata, AUD_BUF_LEN(idx), val: 0); |
898 | } |
899 | |
900 | /* Initial programming of ring buffer */ |
901 | static void had_init_ringbuf(struct snd_pcm_substream *substream, |
902 | struct snd_intelhad *intelhaddata) |
903 | { |
904 | struct snd_pcm_runtime *runtime = substream->runtime; |
905 | int i, num_periods; |
906 | |
907 | num_periods = runtime->periods; |
908 | intelhaddata->num_bds = min(num_periods, HAD_NUM_OF_RING_BUFS); |
909 | /* set the minimum 2 BDs for num_periods=1 */ |
910 | intelhaddata->num_bds = max(intelhaddata->num_bds, 2U); |
911 | intelhaddata->period_bytes = |
912 | frames_to_bytes(runtime, size: runtime->period_size); |
913 | WARN_ON(intelhaddata->period_bytes & 0x3f); |
914 | |
915 | intelhaddata->bd_head = 0; |
916 | intelhaddata->pcmbuf_head = 0; |
917 | intelhaddata->pcmbuf_filled = 0; |
918 | |
919 | for (i = 0; i < HAD_NUM_OF_RING_BUFS; i++) { |
920 | if (i < intelhaddata->num_bds) |
921 | had_prog_bd(substream, intelhaddata); |
922 | else /* invalidate the rest */ |
923 | had_invalidate_bd(intelhaddata, idx: i); |
924 | } |
925 | |
926 | intelhaddata->bd_head = 0; /* reset at head again before starting */ |
927 | } |
928 | |
929 | /* process a bd, advance to the next */ |
930 | static void had_advance_ringbuf(struct snd_pcm_substream *substream, |
931 | struct snd_intelhad *intelhaddata) |
932 | { |
933 | int num_periods = substream->runtime->periods; |
934 | |
935 | /* reprogram the next buffer */ |
936 | had_prog_bd(substream, intelhaddata); |
937 | |
938 | /* proceed to next */ |
939 | intelhaddata->pcmbuf_head++; |
940 | intelhaddata->pcmbuf_head %= num_periods; |
941 | } |
942 | |
943 | /* process the current BD(s); |
944 | * returns the current PCM buffer byte position, or -EPIPE for underrun. |
945 | */ |
946 | static int had_process_ringbuf(struct snd_pcm_substream *substream, |
947 | struct snd_intelhad *intelhaddata) |
948 | { |
949 | int len, processed; |
950 | unsigned long flags; |
951 | |
952 | processed = 0; |
953 | spin_lock_irqsave(&intelhaddata->had_spinlock, flags); |
954 | for (;;) { |
955 | /* get the remaining bytes on the buffer */ |
956 | had_read_register(ctx: intelhaddata, |
957 | AUD_BUF_LEN(intelhaddata->bd_head), |
958 | val: &len); |
959 | if (len < 0 || len > intelhaddata->period_bytes) { |
960 | dev_dbg(intelhaddata->dev, "Invalid buf length %d\n" , |
961 | len); |
962 | len = -EPIPE; |
963 | goto out; |
964 | } |
965 | |
966 | if (len > 0) /* OK, this is the current buffer */ |
967 | break; |
968 | |
969 | /* len=0 => already empty, check the next buffer */ |
970 | if (++processed >= intelhaddata->num_bds) { |
971 | len = -EPIPE; /* all empty? - report underrun */ |
972 | goto out; |
973 | } |
974 | had_advance_ringbuf(substream, intelhaddata); |
975 | } |
976 | |
977 | len = intelhaddata->period_bytes - len; |
978 | len += intelhaddata->period_bytes * intelhaddata->pcmbuf_head; |
979 | out: |
980 | spin_unlock_irqrestore(lock: &intelhaddata->had_spinlock, flags); |
981 | return len; |
982 | } |
983 | |
984 | /* called from irq handler */ |
985 | static void had_process_buffer_done(struct snd_intelhad *intelhaddata) |
986 | { |
987 | struct snd_pcm_substream *substream; |
988 | |
989 | substream = had_substream_get(intelhaddata); |
990 | if (!substream) |
991 | return; /* no stream? - bail out */ |
992 | |
993 | if (!intelhaddata->connected) { |
994 | snd_pcm_stop_xrun(substream); |
995 | goto out; /* disconnected? - bail out */ |
996 | } |
997 | |
998 | /* process or stop the stream */ |
999 | if (had_process_ringbuf(substream, intelhaddata) < 0) |
1000 | snd_pcm_stop_xrun(substream); |
1001 | else |
1002 | snd_pcm_period_elapsed(substream); |
1003 | |
1004 | out: |
1005 | had_substream_put(intelhaddata); |
1006 | } |
1007 | |
1008 | /* |
1009 | * The interrupt status 'sticky' bits might not be cleared by |
1010 | * setting '1' to that bit once... |
1011 | */ |
1012 | static void wait_clear_underrun_bit(struct snd_intelhad *intelhaddata) |
1013 | { |
1014 | int i; |
1015 | u32 val; |
1016 | |
1017 | for (i = 0; i < 100; i++) { |
1018 | /* clear bit30, 31 AUD_HDMI_STATUS */ |
1019 | had_read_register(ctx: intelhaddata, reg: AUD_HDMI_STATUS, val: &val); |
1020 | if (!(val & AUD_HDMI_STATUS_MASK_UNDERRUN)) |
1021 | return; |
1022 | udelay(100); |
1023 | cond_resched(); |
1024 | had_write_register(ctx: intelhaddata, reg: AUD_HDMI_STATUS, val); |
1025 | } |
1026 | dev_err(intelhaddata->dev, "Unable to clear UNDERRUN bits\n" ); |
1027 | } |
1028 | |
1029 | /* Perform some reset procedure after stopping the stream; |
1030 | * this is called from prepare or hw_free callbacks once after trigger STOP |
1031 | * or underrun has been processed in order to settle down the h/w state. |
1032 | */ |
1033 | static int had_pcm_sync_stop(struct snd_pcm_substream *substream) |
1034 | { |
1035 | struct snd_intelhad *intelhaddata = snd_pcm_substream_chip(substream); |
1036 | |
1037 | if (!intelhaddata->connected) |
1038 | return 0; |
1039 | |
1040 | /* Reset buffer pointers */ |
1041 | had_reset_audio(intelhaddata); |
1042 | wait_clear_underrun_bit(intelhaddata); |
1043 | return 0; |
1044 | } |
1045 | |
1046 | /* called from irq handler */ |
1047 | static void had_process_buffer_underrun(struct snd_intelhad *intelhaddata) |
1048 | { |
1049 | struct snd_pcm_substream *substream; |
1050 | |
1051 | /* Report UNDERRUN error to above layers */ |
1052 | substream = had_substream_get(intelhaddata); |
1053 | if (substream) { |
1054 | snd_pcm_stop_xrun(substream); |
1055 | had_substream_put(intelhaddata); |
1056 | } |
1057 | } |
1058 | |
1059 | /* |
1060 | * ALSA PCM open callback |
1061 | */ |
1062 | static int had_pcm_open(struct snd_pcm_substream *substream) |
1063 | { |
1064 | struct snd_intelhad *intelhaddata; |
1065 | struct snd_pcm_runtime *runtime; |
1066 | int retval; |
1067 | |
1068 | intelhaddata = snd_pcm_substream_chip(substream); |
1069 | runtime = substream->runtime; |
1070 | |
1071 | retval = pm_runtime_resume_and_get(dev: intelhaddata->dev); |
1072 | if (retval < 0) |
1073 | return retval; |
1074 | |
1075 | /* set the runtime hw parameter with local snd_pcm_hardware struct */ |
1076 | runtime->hw = had_pcm_hardware; |
1077 | |
1078 | retval = snd_pcm_hw_constraint_integer(runtime, |
1079 | SNDRV_PCM_HW_PARAM_PERIODS); |
1080 | if (retval < 0) |
1081 | goto error; |
1082 | |
1083 | /* Make sure, that the period size is always aligned |
1084 | * 64byte boundary |
1085 | */ |
1086 | retval = snd_pcm_hw_constraint_step(runtime: substream->runtime, cond: 0, |
1087 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, step: 64); |
1088 | if (retval < 0) |
1089 | goto error; |
1090 | |
1091 | retval = snd_pcm_hw_constraint_msbits(runtime, cond: 0, width: 32, msbits: 24); |
1092 | if (retval < 0) |
1093 | goto error; |
1094 | |
1095 | /* expose PCM substream */ |
1096 | spin_lock_irq(lock: &intelhaddata->had_spinlock); |
1097 | intelhaddata->stream_info.substream = substream; |
1098 | intelhaddata->stream_info.substream_refcount++; |
1099 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1100 | |
1101 | return retval; |
1102 | error: |
1103 | pm_runtime_mark_last_busy(dev: intelhaddata->dev); |
1104 | pm_runtime_put_autosuspend(dev: intelhaddata->dev); |
1105 | return retval; |
1106 | } |
1107 | |
1108 | /* |
1109 | * ALSA PCM close callback |
1110 | */ |
1111 | static int had_pcm_close(struct snd_pcm_substream *substream) |
1112 | { |
1113 | struct snd_intelhad *intelhaddata; |
1114 | |
1115 | intelhaddata = snd_pcm_substream_chip(substream); |
1116 | |
1117 | /* unreference and sync with the pending PCM accesses */ |
1118 | spin_lock_irq(lock: &intelhaddata->had_spinlock); |
1119 | intelhaddata->stream_info.substream = NULL; |
1120 | intelhaddata->stream_info.substream_refcount--; |
1121 | while (intelhaddata->stream_info.substream_refcount > 0) { |
1122 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1123 | cpu_relax(); |
1124 | spin_lock_irq(lock: &intelhaddata->had_spinlock); |
1125 | } |
1126 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1127 | |
1128 | pm_runtime_mark_last_busy(dev: intelhaddata->dev); |
1129 | pm_runtime_put_autosuspend(dev: intelhaddata->dev); |
1130 | return 0; |
1131 | } |
1132 | |
1133 | /* |
1134 | * ALSA PCM hw_params callback |
1135 | */ |
1136 | static int had_pcm_hw_params(struct snd_pcm_substream *substream, |
1137 | struct snd_pcm_hw_params *hw_params) |
1138 | { |
1139 | struct snd_intelhad *intelhaddata; |
1140 | int buf_size; |
1141 | |
1142 | intelhaddata = snd_pcm_substream_chip(substream); |
1143 | buf_size = params_buffer_bytes(p: hw_params); |
1144 | dev_dbg(intelhaddata->dev, "%s:allocated memory = %d\n" , |
1145 | __func__, buf_size); |
1146 | return 0; |
1147 | } |
1148 | |
1149 | /* |
1150 | * ALSA PCM trigger callback |
1151 | */ |
1152 | static int had_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
1153 | { |
1154 | int retval = 0; |
1155 | struct snd_intelhad *intelhaddata; |
1156 | |
1157 | intelhaddata = snd_pcm_substream_chip(substream); |
1158 | |
1159 | spin_lock(lock: &intelhaddata->had_spinlock); |
1160 | switch (cmd) { |
1161 | case SNDRV_PCM_TRIGGER_START: |
1162 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
1163 | case SNDRV_PCM_TRIGGER_RESUME: |
1164 | /* Enable Audio */ |
1165 | had_ack_irqs(ctx: intelhaddata); /* FIXME: do we need this? */ |
1166 | had_enable_audio(intelhaddata, enable: true); |
1167 | break; |
1168 | |
1169 | case SNDRV_PCM_TRIGGER_STOP: |
1170 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
1171 | /* Disable Audio */ |
1172 | had_enable_audio(intelhaddata, enable: false); |
1173 | break; |
1174 | |
1175 | default: |
1176 | retval = -EINVAL; |
1177 | } |
1178 | spin_unlock(lock: &intelhaddata->had_spinlock); |
1179 | return retval; |
1180 | } |
1181 | |
1182 | /* |
1183 | * ALSA PCM prepare callback |
1184 | */ |
1185 | static int had_pcm_prepare(struct snd_pcm_substream *substream) |
1186 | { |
1187 | int retval; |
1188 | u32 disp_samp_freq, n_param; |
1189 | u32 link_rate = 0; |
1190 | struct snd_intelhad *intelhaddata; |
1191 | struct snd_pcm_runtime *runtime; |
1192 | |
1193 | intelhaddata = snd_pcm_substream_chip(substream); |
1194 | runtime = substream->runtime; |
1195 | |
1196 | dev_dbg(intelhaddata->dev, "period_size=%d\n" , |
1197 | (int)frames_to_bytes(runtime, runtime->period_size)); |
1198 | dev_dbg(intelhaddata->dev, "periods=%d\n" , runtime->periods); |
1199 | dev_dbg(intelhaddata->dev, "buffer_size=%d\n" , |
1200 | (int)snd_pcm_lib_buffer_bytes(substream)); |
1201 | dev_dbg(intelhaddata->dev, "rate=%d\n" , runtime->rate); |
1202 | dev_dbg(intelhaddata->dev, "channels=%d\n" , runtime->channels); |
1203 | |
1204 | /* Get N value in KHz */ |
1205 | disp_samp_freq = intelhaddata->tmds_clock_speed; |
1206 | |
1207 | retval = had_prog_n(aud_samp_freq: substream->runtime->rate, n_param: &n_param, intelhaddata); |
1208 | if (retval) { |
1209 | dev_err(intelhaddata->dev, |
1210 | "programming N value failed %#x\n" , retval); |
1211 | goto prep_end; |
1212 | } |
1213 | |
1214 | if (intelhaddata->dp_output) |
1215 | link_rate = intelhaddata->link_rate; |
1216 | |
1217 | had_prog_cts(aud_samp_freq: substream->runtime->rate, tmds: disp_samp_freq, link_rate, |
1218 | n_param, intelhaddata); |
1219 | |
1220 | had_prog_dip(substream, intelhaddata); |
1221 | |
1222 | retval = had_init_audio_ctrl(substream, intelhaddata); |
1223 | |
1224 | /* Prog buffer address */ |
1225 | had_init_ringbuf(substream, intelhaddata); |
1226 | |
1227 | /* |
1228 | * Program channel mapping in following order: |
1229 | * FL, FR, C, LFE, RL, RR |
1230 | */ |
1231 | |
1232 | had_write_register(ctx: intelhaddata, reg: AUD_BUF_CH_SWAP, SWAP_LFE_CENTER); |
1233 | |
1234 | prep_end: |
1235 | return retval; |
1236 | } |
1237 | |
1238 | /* |
1239 | * ALSA PCM pointer callback |
1240 | */ |
1241 | static snd_pcm_uframes_t had_pcm_pointer(struct snd_pcm_substream *substream) |
1242 | { |
1243 | struct snd_intelhad *intelhaddata; |
1244 | int len; |
1245 | |
1246 | intelhaddata = snd_pcm_substream_chip(substream); |
1247 | |
1248 | if (!intelhaddata->connected) |
1249 | return SNDRV_PCM_POS_XRUN; |
1250 | |
1251 | len = had_process_ringbuf(substream, intelhaddata); |
1252 | if (len < 0) |
1253 | return SNDRV_PCM_POS_XRUN; |
1254 | len = bytes_to_frames(runtime: substream->runtime, size: len); |
1255 | /* wrapping may happen when periods=1 */ |
1256 | len %= substream->runtime->buffer_size; |
1257 | return len; |
1258 | } |
1259 | |
1260 | /* |
1261 | * ALSA PCM ops |
1262 | */ |
1263 | static const struct snd_pcm_ops had_pcm_ops = { |
1264 | .open = had_pcm_open, |
1265 | .close = had_pcm_close, |
1266 | .hw_params = had_pcm_hw_params, |
1267 | .prepare = had_pcm_prepare, |
1268 | .trigger = had_pcm_trigger, |
1269 | .sync_stop = had_pcm_sync_stop, |
1270 | .pointer = had_pcm_pointer, |
1271 | }; |
1272 | |
1273 | /* process mode change of the running stream; called in mutex */ |
1274 | static int had_process_mode_change(struct snd_intelhad *intelhaddata) |
1275 | { |
1276 | struct snd_pcm_substream *substream; |
1277 | int retval = 0; |
1278 | u32 disp_samp_freq, n_param; |
1279 | u32 link_rate = 0; |
1280 | |
1281 | substream = had_substream_get(intelhaddata); |
1282 | if (!substream) |
1283 | return 0; |
1284 | |
1285 | /* Disable Audio */ |
1286 | had_enable_audio(intelhaddata, enable: false); |
1287 | |
1288 | /* Update CTS value */ |
1289 | disp_samp_freq = intelhaddata->tmds_clock_speed; |
1290 | |
1291 | retval = had_prog_n(aud_samp_freq: substream->runtime->rate, n_param: &n_param, intelhaddata); |
1292 | if (retval) { |
1293 | dev_err(intelhaddata->dev, |
1294 | "programming N value failed %#x\n" , retval); |
1295 | goto out; |
1296 | } |
1297 | |
1298 | if (intelhaddata->dp_output) |
1299 | link_rate = intelhaddata->link_rate; |
1300 | |
1301 | had_prog_cts(aud_samp_freq: substream->runtime->rate, tmds: disp_samp_freq, link_rate, |
1302 | n_param, intelhaddata); |
1303 | |
1304 | /* Enable Audio */ |
1305 | had_enable_audio(intelhaddata, enable: true); |
1306 | |
1307 | out: |
1308 | had_substream_put(intelhaddata); |
1309 | return retval; |
1310 | } |
1311 | |
1312 | /* process hot plug, called from wq with mutex locked */ |
1313 | static void had_process_hot_plug(struct snd_intelhad *intelhaddata) |
1314 | { |
1315 | struct snd_pcm_substream *substream; |
1316 | |
1317 | spin_lock_irq(lock: &intelhaddata->had_spinlock); |
1318 | if (intelhaddata->connected) { |
1319 | dev_dbg(intelhaddata->dev, "Device already connected\n" ); |
1320 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1321 | return; |
1322 | } |
1323 | |
1324 | /* Disable Audio */ |
1325 | had_enable_audio(intelhaddata, enable: false); |
1326 | |
1327 | intelhaddata->connected = true; |
1328 | dev_dbg(intelhaddata->dev, |
1329 | "%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_CONNECTED\n" , |
1330 | __func__, __LINE__); |
1331 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1332 | |
1333 | had_build_channel_allocation_map(intelhaddata); |
1334 | |
1335 | /* Report to above ALSA layer */ |
1336 | substream = had_substream_get(intelhaddata); |
1337 | if (substream) { |
1338 | snd_pcm_stop_xrun(substream); |
1339 | had_substream_put(intelhaddata); |
1340 | } |
1341 | |
1342 | snd_jack_report(jack: intelhaddata->jack, status: SND_JACK_AVOUT); |
1343 | } |
1344 | |
1345 | /* process hot unplug, called from wq with mutex locked */ |
1346 | static void had_process_hot_unplug(struct snd_intelhad *intelhaddata) |
1347 | { |
1348 | struct snd_pcm_substream *substream; |
1349 | |
1350 | spin_lock_irq(lock: &intelhaddata->had_spinlock); |
1351 | if (!intelhaddata->connected) { |
1352 | dev_dbg(intelhaddata->dev, "Device already disconnected\n" ); |
1353 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1354 | return; |
1355 | |
1356 | } |
1357 | |
1358 | /* Disable Audio */ |
1359 | had_enable_audio(intelhaddata, enable: false); |
1360 | |
1361 | intelhaddata->connected = false; |
1362 | dev_dbg(intelhaddata->dev, |
1363 | "%s @ %d:DEBUG PLUG/UNPLUG : HAD_DRV_DISCONNECTED\n" , |
1364 | __func__, __LINE__); |
1365 | spin_unlock_irq(lock: &intelhaddata->had_spinlock); |
1366 | |
1367 | kfree(objp: intelhaddata->chmap->chmap); |
1368 | intelhaddata->chmap->chmap = NULL; |
1369 | |
1370 | /* Report to above ALSA layer */ |
1371 | substream = had_substream_get(intelhaddata); |
1372 | if (substream) { |
1373 | snd_pcm_stop_xrun(substream); |
1374 | had_substream_put(intelhaddata); |
1375 | } |
1376 | |
1377 | snd_jack_report(jack: intelhaddata->jack, status: 0); |
1378 | } |
1379 | |
1380 | /* |
1381 | * ALSA iec958 and ELD controls |
1382 | */ |
1383 | |
1384 | static int had_iec958_info(struct snd_kcontrol *kcontrol, |
1385 | struct snd_ctl_elem_info *uinfo) |
1386 | { |
1387 | uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958; |
1388 | uinfo->count = 1; |
1389 | return 0; |
1390 | } |
1391 | |
1392 | static int had_iec958_get(struct snd_kcontrol *kcontrol, |
1393 | struct snd_ctl_elem_value *ucontrol) |
1394 | { |
1395 | struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol); |
1396 | |
1397 | mutex_lock(&intelhaddata->mutex); |
1398 | ucontrol->value.iec958.status[0] = (intelhaddata->aes_bits >> 0) & 0xff; |
1399 | ucontrol->value.iec958.status[1] = (intelhaddata->aes_bits >> 8) & 0xff; |
1400 | ucontrol->value.iec958.status[2] = |
1401 | (intelhaddata->aes_bits >> 16) & 0xff; |
1402 | ucontrol->value.iec958.status[3] = |
1403 | (intelhaddata->aes_bits >> 24) & 0xff; |
1404 | mutex_unlock(lock: &intelhaddata->mutex); |
1405 | return 0; |
1406 | } |
1407 | |
1408 | static int had_iec958_mask_get(struct snd_kcontrol *kcontrol, |
1409 | struct snd_ctl_elem_value *ucontrol) |
1410 | { |
1411 | ucontrol->value.iec958.status[0] = 0xff; |
1412 | ucontrol->value.iec958.status[1] = 0xff; |
1413 | ucontrol->value.iec958.status[2] = 0xff; |
1414 | ucontrol->value.iec958.status[3] = 0xff; |
1415 | return 0; |
1416 | } |
1417 | |
1418 | static int had_iec958_put(struct snd_kcontrol *kcontrol, |
1419 | struct snd_ctl_elem_value *ucontrol) |
1420 | { |
1421 | unsigned int val; |
1422 | struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol); |
1423 | int changed = 0; |
1424 | |
1425 | val = (ucontrol->value.iec958.status[0] << 0) | |
1426 | (ucontrol->value.iec958.status[1] << 8) | |
1427 | (ucontrol->value.iec958.status[2] << 16) | |
1428 | (ucontrol->value.iec958.status[3] << 24); |
1429 | mutex_lock(&intelhaddata->mutex); |
1430 | if (intelhaddata->aes_bits != val) { |
1431 | intelhaddata->aes_bits = val; |
1432 | changed = 1; |
1433 | } |
1434 | mutex_unlock(lock: &intelhaddata->mutex); |
1435 | return changed; |
1436 | } |
1437 | |
1438 | static int had_ctl_eld_info(struct snd_kcontrol *kcontrol, |
1439 | struct snd_ctl_elem_info *uinfo) |
1440 | { |
1441 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES; |
1442 | uinfo->count = HDMI_MAX_ELD_BYTES; |
1443 | return 0; |
1444 | } |
1445 | |
1446 | static int had_ctl_eld_get(struct snd_kcontrol *kcontrol, |
1447 | struct snd_ctl_elem_value *ucontrol) |
1448 | { |
1449 | struct snd_intelhad *intelhaddata = snd_kcontrol_chip(kcontrol); |
1450 | |
1451 | mutex_lock(&intelhaddata->mutex); |
1452 | memcpy(ucontrol->value.bytes.data, intelhaddata->eld, |
1453 | HDMI_MAX_ELD_BYTES); |
1454 | mutex_unlock(lock: &intelhaddata->mutex); |
1455 | return 0; |
1456 | } |
1457 | |
1458 | static const struct snd_kcontrol_new had_controls[] = { |
1459 | { |
1460 | .access = SNDRV_CTL_ELEM_ACCESS_READ, |
1461 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
1462 | .name = SNDRV_CTL_NAME_IEC958("" , PLAYBACK, MASK), |
1463 | .info = had_iec958_info, /* shared */ |
1464 | .get = had_iec958_mask_get, |
1465 | }, |
1466 | { |
1467 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
1468 | .name = SNDRV_CTL_NAME_IEC958("" , PLAYBACK, DEFAULT), |
1469 | .info = had_iec958_info, |
1470 | .get = had_iec958_get, |
1471 | .put = had_iec958_put, |
1472 | }, |
1473 | { |
1474 | .access = (SNDRV_CTL_ELEM_ACCESS_READ | |
1475 | SNDRV_CTL_ELEM_ACCESS_VOLATILE), |
1476 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, |
1477 | .name = "ELD" , |
1478 | .info = had_ctl_eld_info, |
1479 | .get = had_ctl_eld_get, |
1480 | }, |
1481 | }; |
1482 | |
1483 | /* |
1484 | * audio interrupt handler |
1485 | */ |
1486 | static irqreturn_t display_pipe_interrupt_handler(int irq, void *dev_id) |
1487 | { |
1488 | struct snd_intelhad_card *card_ctx = dev_id; |
1489 | u32 audio_stat[3] = {}; |
1490 | int pipe, port; |
1491 | |
1492 | for_each_pipe(card_ctx, pipe) { |
1493 | /* use raw register access to ack IRQs even while disconnected */ |
1494 | audio_stat[pipe] = had_read_register_raw(card_ctx, pipe, |
1495 | reg: AUD_HDMI_STATUS) & |
1496 | (HDMI_AUDIO_UNDERRUN | HDMI_AUDIO_BUFFER_DONE); |
1497 | |
1498 | if (audio_stat[pipe]) |
1499 | had_write_register_raw(card_ctx, pipe, |
1500 | reg: AUD_HDMI_STATUS, val: audio_stat[pipe]); |
1501 | } |
1502 | |
1503 | for_each_port(card_ctx, port) { |
1504 | struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port]; |
1505 | int pipe = ctx->pipe; |
1506 | |
1507 | if (pipe < 0) |
1508 | continue; |
1509 | |
1510 | if (audio_stat[pipe] & HDMI_AUDIO_BUFFER_DONE) |
1511 | had_process_buffer_done(intelhaddata: ctx); |
1512 | if (audio_stat[pipe] & HDMI_AUDIO_UNDERRUN) |
1513 | had_process_buffer_underrun(intelhaddata: ctx); |
1514 | } |
1515 | |
1516 | return IRQ_HANDLED; |
1517 | } |
1518 | |
1519 | /* |
1520 | * monitor plug/unplug notification from i915; just kick off the work |
1521 | */ |
1522 | static void notify_audio_lpe(struct platform_device *pdev, int port) |
1523 | { |
1524 | struct snd_intelhad_card *card_ctx = platform_get_drvdata(pdev); |
1525 | struct snd_intelhad *ctx; |
1526 | |
1527 | ctx = &card_ctx->pcm_ctx[single_port ? 0 : port]; |
1528 | if (single_port) |
1529 | ctx->port = port; |
1530 | |
1531 | schedule_work(work: &ctx->hdmi_audio_wq); |
1532 | } |
1533 | |
1534 | /* the work to handle monitor hot plug/unplug */ |
1535 | static void had_audio_wq(struct work_struct *work) |
1536 | { |
1537 | struct snd_intelhad *ctx = |
1538 | container_of(work, struct snd_intelhad, hdmi_audio_wq); |
1539 | struct intel_hdmi_lpe_audio_pdata *pdata = ctx->dev->platform_data; |
1540 | struct intel_hdmi_lpe_audio_port_pdata *ppdata = &pdata->port[ctx->port]; |
1541 | int ret; |
1542 | |
1543 | ret = pm_runtime_resume_and_get(dev: ctx->dev); |
1544 | if (ret < 0) |
1545 | return; |
1546 | |
1547 | mutex_lock(&ctx->mutex); |
1548 | if (ppdata->pipe < 0) { |
1549 | dev_dbg(ctx->dev, "%s: Event: HAD_NOTIFY_HOT_UNPLUG : port = %d\n" , |
1550 | __func__, ctx->port); |
1551 | |
1552 | memset(ctx->eld, 0, sizeof(ctx->eld)); /* clear the old ELD */ |
1553 | |
1554 | ctx->dp_output = false; |
1555 | ctx->tmds_clock_speed = 0; |
1556 | ctx->link_rate = 0; |
1557 | |
1558 | /* Shut down the stream */ |
1559 | had_process_hot_unplug(intelhaddata: ctx); |
1560 | |
1561 | ctx->pipe = -1; |
1562 | } else { |
1563 | dev_dbg(ctx->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n" , |
1564 | __func__, ctx->port, ppdata->ls_clock); |
1565 | |
1566 | memcpy(ctx->eld, ppdata->eld, sizeof(ctx->eld)); |
1567 | |
1568 | ctx->dp_output = ppdata->dp_output; |
1569 | if (ctx->dp_output) { |
1570 | ctx->tmds_clock_speed = 0; |
1571 | ctx->link_rate = ppdata->ls_clock; |
1572 | } else { |
1573 | ctx->tmds_clock_speed = ppdata->ls_clock; |
1574 | ctx->link_rate = 0; |
1575 | } |
1576 | |
1577 | /* |
1578 | * Shut down the stream before we change |
1579 | * the pipe assignment for this pcm device |
1580 | */ |
1581 | had_process_hot_plug(intelhaddata: ctx); |
1582 | |
1583 | ctx->pipe = ppdata->pipe; |
1584 | |
1585 | /* Restart the stream if necessary */ |
1586 | had_process_mode_change(intelhaddata: ctx); |
1587 | } |
1588 | |
1589 | mutex_unlock(lock: &ctx->mutex); |
1590 | pm_runtime_mark_last_busy(dev: ctx->dev); |
1591 | pm_runtime_put_autosuspend(dev: ctx->dev); |
1592 | } |
1593 | |
1594 | /* |
1595 | * Jack interface |
1596 | */ |
1597 | static int had_create_jack(struct snd_intelhad *ctx, |
1598 | struct snd_pcm *pcm) |
1599 | { |
1600 | char hdmi_str[32]; |
1601 | int err; |
1602 | |
1603 | snprintf(buf: hdmi_str, size: sizeof(hdmi_str), |
1604 | fmt: "HDMI/DP,pcm=%d" , pcm->device); |
1605 | |
1606 | err = snd_jack_new(card: ctx->card_ctx->card, id: hdmi_str, |
1607 | type: SND_JACK_AVOUT, jack: &ctx->jack, |
1608 | initial_kctl: true, phantom_jack: false); |
1609 | if (err < 0) |
1610 | return err; |
1611 | ctx->jack->private_data = ctx; |
1612 | return 0; |
1613 | } |
1614 | |
1615 | /* |
1616 | * PM callbacks |
1617 | */ |
1618 | |
1619 | static int __maybe_unused hdmi_lpe_audio_suspend(struct device *dev) |
1620 | { |
1621 | struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev); |
1622 | |
1623 | snd_power_change_state(card: card_ctx->card, SNDRV_CTL_POWER_D3hot); |
1624 | |
1625 | return 0; |
1626 | } |
1627 | |
1628 | static int __maybe_unused hdmi_lpe_audio_resume(struct device *dev) |
1629 | { |
1630 | struct snd_intelhad_card *card_ctx = dev_get_drvdata(dev); |
1631 | |
1632 | pm_runtime_mark_last_busy(dev); |
1633 | |
1634 | snd_power_change_state(card: card_ctx->card, SNDRV_CTL_POWER_D0); |
1635 | |
1636 | return 0; |
1637 | } |
1638 | |
1639 | /* release resources */ |
1640 | static void hdmi_lpe_audio_free(struct snd_card *card) |
1641 | { |
1642 | struct snd_intelhad_card *card_ctx = card->private_data; |
1643 | struct intel_hdmi_lpe_audio_pdata *pdata = card_ctx->dev->platform_data; |
1644 | int port; |
1645 | |
1646 | spin_lock_irq(lock: &pdata->lpe_audio_slock); |
1647 | pdata->notify_audio_lpe = NULL; |
1648 | spin_unlock_irq(lock: &pdata->lpe_audio_slock); |
1649 | |
1650 | for_each_port(card_ctx, port) { |
1651 | struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port]; |
1652 | |
1653 | cancel_work_sync(work: &ctx->hdmi_audio_wq); |
1654 | } |
1655 | } |
1656 | |
1657 | /* |
1658 | * hdmi_lpe_audio_probe - start bridge with i915 |
1659 | * |
1660 | * This function is called when the i915 driver creates the |
1661 | * hdmi-lpe-audio platform device. |
1662 | */ |
1663 | static int __hdmi_lpe_audio_probe(struct platform_device *pdev) |
1664 | { |
1665 | struct snd_card *card; |
1666 | struct snd_intelhad_card *card_ctx; |
1667 | struct snd_intelhad *ctx; |
1668 | struct snd_pcm *pcm; |
1669 | struct intel_hdmi_lpe_audio_pdata *pdata; |
1670 | int irq; |
1671 | struct resource *res_mmio; |
1672 | int port, ret; |
1673 | |
1674 | pdata = pdev->dev.platform_data; |
1675 | if (!pdata) { |
1676 | dev_err(&pdev->dev, "%s: quit: pdata not allocated by i915!!\n" , __func__); |
1677 | return -EINVAL; |
1678 | } |
1679 | |
1680 | /* get resources */ |
1681 | irq = platform_get_irq(pdev, 0); |
1682 | if (irq < 0) |
1683 | return irq; |
1684 | |
1685 | res_mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1686 | if (!res_mmio) { |
1687 | dev_err(&pdev->dev, "Could not get IO_MEM resources\n" ); |
1688 | return -ENXIO; |
1689 | } |
1690 | |
1691 | /* create a card instance with ALSA framework */ |
1692 | ret = snd_devm_card_new(parent: &pdev->dev, idx: hdmi_card_index, xid: hdmi_card_id, |
1693 | THIS_MODULE, extra_size: sizeof(*card_ctx), card_ret: &card); |
1694 | if (ret) |
1695 | return ret; |
1696 | |
1697 | card_ctx = card->private_data; |
1698 | card_ctx->dev = &pdev->dev; |
1699 | card_ctx->card = card; |
1700 | strcpy(p: card->driver, INTEL_HAD); |
1701 | strcpy(p: card->shortname, q: "Intel HDMI/DP LPE Audio" ); |
1702 | strcpy(p: card->longname, q: "Intel HDMI/DP LPE Audio" ); |
1703 | |
1704 | card_ctx->irq = -1; |
1705 | |
1706 | card->private_free = hdmi_lpe_audio_free; |
1707 | |
1708 | platform_set_drvdata(pdev, data: card_ctx); |
1709 | |
1710 | card_ctx->num_pipes = pdata->num_pipes; |
1711 | card_ctx->num_ports = single_port ? 1 : pdata->num_ports; |
1712 | |
1713 | for_each_port(card_ctx, port) { |
1714 | ctx = &card_ctx->pcm_ctx[port]; |
1715 | ctx->card_ctx = card_ctx; |
1716 | ctx->dev = card_ctx->dev; |
1717 | ctx->port = single_port ? -1 : port; |
1718 | ctx->pipe = -1; |
1719 | |
1720 | spin_lock_init(&ctx->had_spinlock); |
1721 | mutex_init(&ctx->mutex); |
1722 | INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq); |
1723 | } |
1724 | |
1725 | dev_dbg(&pdev->dev, "%s: mmio_start = 0x%x, mmio_end = 0x%x\n" , |
1726 | __func__, (unsigned int)res_mmio->start, |
1727 | (unsigned int)res_mmio->end); |
1728 | |
1729 | card_ctx->mmio_start = |
1730 | devm_ioremap(dev: &pdev->dev, offset: res_mmio->start, |
1731 | size: (size_t)(resource_size(res: res_mmio))); |
1732 | if (!card_ctx->mmio_start) { |
1733 | dev_err(&pdev->dev, "Could not get ioremap\n" ); |
1734 | return -EACCES; |
1735 | } |
1736 | |
1737 | /* setup interrupt handler */ |
1738 | ret = devm_request_irq(dev: &pdev->dev, irq, handler: display_pipe_interrupt_handler, |
1739 | irqflags: 0, devname: pdev->name, dev_id: card_ctx); |
1740 | if (ret < 0) { |
1741 | dev_err(&pdev->dev, "request_irq failed\n" ); |
1742 | return ret; |
1743 | } |
1744 | |
1745 | card_ctx->irq = irq; |
1746 | |
1747 | /* only 32bit addressable */ |
1748 | ret = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(32)); |
1749 | if (ret) |
1750 | return ret; |
1751 | |
1752 | init_channel_allocations(); |
1753 | |
1754 | card_ctx->num_pipes = pdata->num_pipes; |
1755 | card_ctx->num_ports = single_port ? 1 : pdata->num_ports; |
1756 | |
1757 | for_each_port(card_ctx, port) { |
1758 | int i; |
1759 | |
1760 | ctx = &card_ctx->pcm_ctx[port]; |
1761 | ret = snd_pcm_new(card, INTEL_HAD, device: port, MAX_PB_STREAMS, |
1762 | MAX_CAP_STREAMS, rpcm: &pcm); |
1763 | if (ret) |
1764 | return ret; |
1765 | |
1766 | /* setup private data which can be retrieved when required */ |
1767 | pcm->private_data = ctx; |
1768 | pcm->info_flags = 0; |
1769 | strscpy(p: pcm->name, q: card->shortname, strlen(card->shortname)); |
1770 | /* setup the ops for playback */ |
1771 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &had_pcm_ops); |
1772 | |
1773 | /* allocate dma pages; |
1774 | * try to allocate 600k buffer as default which is large enough |
1775 | */ |
1776 | snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC, |
1777 | data: card->dev, HAD_DEFAULT_BUFFER, |
1778 | HAD_MAX_BUFFER); |
1779 | |
1780 | /* create controls */ |
1781 | for (i = 0; i < ARRAY_SIZE(had_controls); i++) { |
1782 | struct snd_kcontrol *kctl; |
1783 | |
1784 | kctl = snd_ctl_new1(kcontrolnew: &had_controls[i], private_data: ctx); |
1785 | if (!kctl) |
1786 | return -ENOMEM; |
1787 | |
1788 | kctl->id.device = pcm->device; |
1789 | |
1790 | ret = snd_ctl_add(card, kcontrol: kctl); |
1791 | if (ret < 0) |
1792 | return ret; |
1793 | } |
1794 | |
1795 | /* Register channel map controls */ |
1796 | ret = had_register_chmap_ctls(intelhaddata: ctx, pcm); |
1797 | if (ret < 0) |
1798 | return ret; |
1799 | |
1800 | ret = had_create_jack(ctx, pcm); |
1801 | if (ret < 0) |
1802 | return ret; |
1803 | } |
1804 | |
1805 | ret = snd_card_register(card); |
1806 | if (ret) |
1807 | return ret; |
1808 | |
1809 | spin_lock_irq(lock: &pdata->lpe_audio_slock); |
1810 | pdata->notify_audio_lpe = notify_audio_lpe; |
1811 | spin_unlock_irq(lock: &pdata->lpe_audio_slock); |
1812 | |
1813 | pm_runtime_set_autosuspend_delay(dev: &pdev->dev, INTEL_HDMI_AUDIO_SUSPEND_DELAY_MS); |
1814 | pm_runtime_use_autosuspend(dev: &pdev->dev); |
1815 | pm_runtime_enable(dev: &pdev->dev); |
1816 | pm_runtime_mark_last_busy(dev: &pdev->dev); |
1817 | pm_runtime_idle(dev: &pdev->dev); |
1818 | |
1819 | dev_dbg(&pdev->dev, "%s: handle pending notification\n" , __func__); |
1820 | for_each_port(card_ctx, port) { |
1821 | struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port]; |
1822 | |
1823 | schedule_work(work: &ctx->hdmi_audio_wq); |
1824 | } |
1825 | |
1826 | return 0; |
1827 | } |
1828 | |
1829 | static int hdmi_lpe_audio_probe(struct platform_device *pdev) |
1830 | { |
1831 | return snd_card_free_on_error(dev: &pdev->dev, ret: __hdmi_lpe_audio_probe(pdev)); |
1832 | } |
1833 | |
1834 | static const struct dev_pm_ops hdmi_lpe_audio_pm = { |
1835 | SET_SYSTEM_SLEEP_PM_OPS(hdmi_lpe_audio_suspend, hdmi_lpe_audio_resume) |
1836 | }; |
1837 | |
1838 | static struct platform_driver hdmi_lpe_audio_driver = { |
1839 | .driver = { |
1840 | .name = "hdmi-lpe-audio" , |
1841 | .pm = &hdmi_lpe_audio_pm, |
1842 | }, |
1843 | .probe = hdmi_lpe_audio_probe, |
1844 | }; |
1845 | |
1846 | module_platform_driver(hdmi_lpe_audio_driver); |
1847 | MODULE_ALIAS("platform:hdmi_lpe_audio" ); |
1848 | |
1849 | MODULE_AUTHOR("Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>" ); |
1850 | MODULE_AUTHOR("Ramesh Babu K V <ramesh.babu@intel.com>" ); |
1851 | MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@intel.com>" ); |
1852 | MODULE_AUTHOR("Jerome Anand <jerome.anand@intel.com>" ); |
1853 | MODULE_DESCRIPTION("Intel HDMI Audio driver" ); |
1854 | MODULE_LICENSE("GPL v2" ); |
1855 | |