summaryrefslogtreecommitdiff
path: root/sound/soc/qcom/qdsp6/q6apm-dai.c
blob: 00bbd291be5cea4b5f43ee06b85b55dfb8eb91c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2021, Linaro Limited

#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <linux/spinlock.h>
#include <sound/pcm.h>
#include <asm/dma.h>
#include <linux/dma-mapping.h>
#include <sound/pcm_params.h>
#include "q6apm.h"

#define DRV_NAME "q6apm-dai"

#define PLAYBACK_MIN_NUM_PERIODS	2
#define PLAYBACK_MAX_NUM_PERIODS	8
#define PLAYBACK_MAX_PERIOD_SIZE	65536
#define PLAYBACK_MIN_PERIOD_SIZE	128
#define CAPTURE_MIN_NUM_PERIODS		2
#define CAPTURE_MAX_NUM_PERIODS		8
#define CAPTURE_MAX_PERIOD_SIZE		4096
#define CAPTURE_MIN_PERIOD_SIZE		320
#define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
#define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
#define COMPR_PLAYBACK_MAX_FRAGMENT_SIZE (128 * 1024)
#define COMPR_PLAYBACK_MAX_NUM_FRAGMENTS (16 * 4)
#define COMPR_PLAYBACK_MIN_FRAGMENT_SIZE (8 * 1024)
#define COMPR_PLAYBACK_MIN_NUM_FRAGMENTS (4)
#define SID_MASK_DEFAULT	0xF

static const struct snd_compr_codec_caps q6apm_compr_caps = {
	.num_descriptors = 1,
	.descriptor[0].max_ch = 2,
	.descriptor[0].sample_rates = {	8000, 11025, 12000, 16000, 22050,
					24000, 32000, 44100, 48000, 88200,
					96000, 176400, 192000 },
	.descriptor[0].num_sample_rates = 13,
	.descriptor[0].bit_rate[0] = 320,
	.descriptor[0].bit_rate[1] = 128,
	.descriptor[0].num_bitrates = 2,
	.descriptor[0].profiles = 0,
	.descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO,
	.descriptor[0].formats = 0,
};

enum stream_state {
	Q6APM_STREAM_IDLE = 0,
	Q6APM_STREAM_STOPPED,
	Q6APM_STREAM_RUNNING,
};

struct q6apm_dai_rtd {
	struct snd_pcm_substream *substream;
	struct snd_compr_stream *cstream;
	struct snd_codec codec;
	struct snd_compr_params codec_param;
	struct snd_dma_buffer dma_buffer;
	phys_addr_t phys;
	unsigned int pcm_size;
	unsigned int pcm_count;
	unsigned int pos;       /* Buffer position */
	unsigned int periods;
	unsigned int bytes_sent;
	unsigned int bytes_received;
	unsigned int copied_total;
	uint16_t bits_per_sample;
	uint16_t source; /* Encoding source bit mask */
	uint16_t session_id;
	bool next_track;
	enum stream_state state;
	struct q6apm_graph *graph;
	spinlock_t lock;
	uint32_t initial_samples_drop;
	uint32_t trailing_samples_drop;
	bool notify_on_drain;
};

struct q6apm_dai_data {
	long long sid;
};

static struct snd_pcm_hardware q6apm_dai_hardware_capture = {
	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
				 SNDRV_PCM_INFO_BATCH),
	.formats =              (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
	.rates =                SNDRV_PCM_RATE_8000_48000,
	.rate_min =             8000,
	.rate_max =             48000,
	.channels_min =         2,
	.channels_max =         4,
	.buffer_bytes_max =     CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
	.period_bytes_min =	CAPTURE_MIN_PERIOD_SIZE,
	.period_bytes_max =     CAPTURE_MAX_PERIOD_SIZE,
	.periods_min =          CAPTURE_MIN_NUM_PERIODS,
	.periods_max =          CAPTURE_MAX_NUM_PERIODS,
	.fifo_size =            0,
};

static struct snd_pcm_hardware q6apm_dai_hardware_playback = {
	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
				 SNDRV_PCM_INFO_BATCH),
	.formats =              (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
	.rates =                SNDRV_PCM_RATE_8000_192000,
	.rate_min =             8000,
	.rate_max =             192000,
	.channels_min =         2,
	.channels_max =         8,
	.buffer_bytes_max =     (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
	.period_bytes_min =	PLAYBACK_MIN_PERIOD_SIZE,
	.period_bytes_max =     PLAYBACK_MAX_PERIOD_SIZE,
	.periods_min =          PLAYBACK_MIN_NUM_PERIODS,
	.periods_max =          PLAYBACK_MAX_NUM_PERIODS,
	.fifo_size =            0,
};

static void event_handler(uint32_t opcode, uint32_t token, void *payload, void *priv)
{
	struct q6apm_dai_rtd *prtd = priv;
	struct snd_pcm_substream *substream = prtd->substream;
	unsigned long flags;

	switch (opcode) {
	case APM_CLIENT_EVENT_CMD_EOS_DONE:
		prtd->state = Q6APM_STREAM_STOPPED;
		break;
	case APM_CLIENT_EVENT_DATA_WRITE_DONE:
		spin_lock_irqsave(&prtd->lock, flags);
		prtd->pos += prtd->pcm_count;
		spin_unlock_irqrestore(&prtd->lock, flags);
		snd_pcm_period_elapsed(substream);
		if (prtd->state == Q6APM_STREAM_RUNNING)
			q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);

		break;
	case APM_CLIENT_EVENT_DATA_READ_DONE:
		spin_lock_irqsave(&prtd->lock, flags);
		prtd->pos += prtd->pcm_count;
		spin_unlock_irqrestore(&prtd->lock, flags);
		snd_pcm_period_elapsed(substream);
		if (prtd->state == Q6APM_STREAM_RUNNING)
			q6apm_read(prtd->graph);

		break;
	default:
		break;
	}
}

static void event_handler_compr(uint32_t opcode, uint32_t token,
				void *payload, void *priv)
{
	struct q6apm_dai_rtd *prtd = priv;
	struct snd_compr_stream *substream = prtd->cstream;
	unsigned long flags;
	uint32_t wflags = 0;
	uint64_t avail;
	uint32_t bytes_written, bytes_to_write;
	bool is_last_buffer = false;

	switch (opcode) {
	case APM_CLIENT_EVENT_CMD_EOS_DONE:
		spin_lock_irqsave(&prtd->lock, flags);
		if (prtd->notify_on_drain) {
			snd_compr_drain_notify(prtd->cstream);
			prtd->notify_on_drain = false;
		} else {
			prtd->state = Q6APM_STREAM_STOPPED;
		}
		spin_unlock_irqrestore(&prtd->lock, flags);
		break;
	case APM_CLIENT_EVENT_DATA_WRITE_DONE:
		spin_lock_irqsave(&prtd->lock, flags);
		bytes_written = token >> APM_WRITE_TOKEN_LEN_SHIFT;
		prtd->copied_total += bytes_written;
		snd_compr_fragment_elapsed(substream);

		if (prtd->state != Q6APM_STREAM_RUNNING) {
			spin_unlock_irqrestore(&prtd->lock, flags);
			break;
		}

		avail = prtd->bytes_received - prtd->bytes_sent;

		if (avail > prtd->pcm_count) {
			bytes_to_write = prtd->pcm_count;
		} else {
			if (substream->partial_drain || prtd->notify_on_drain)
				is_last_buffer = true;
			bytes_to_write = avail;
		}

		if (bytes_to_write) {
			if (substream->partial_drain && is_last_buffer)
				wflags |= APM_LAST_BUFFER_FLAG;

			q6apm_write_async(prtd->graph,
						bytes_to_write, 0, 0, wflags);

			prtd->bytes_sent += bytes_to_write;

			if (prtd->notify_on_drain && is_last_buffer)
				audioreach_shared_memory_send_eos(prtd->graph);
		}

		spin_unlock_irqrestore(&prtd->lock, flags);
		break;
	default:
		break;
	}
}

static int q6apm_dai_prepare(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	struct audioreach_module_config cfg;
	struct device *dev = component->dev;
	struct q6apm_dai_data *pdata;
	int ret;

	pdata = snd_soc_component_get_drvdata(component);
	if (!pdata)
		return -EINVAL;

	if (!prtd || !prtd->graph) {
		dev_err(dev, "%s: private data null or audio client freed\n", __func__);
		return -EINVAL;
	}

	cfg.direction = substream->stream;
	cfg.sample_rate = runtime->rate;
	cfg.num_channels = runtime->channels;
	cfg.bit_width = prtd->bits_per_sample;
	cfg.fmt = SND_AUDIOCODEC_PCM;

	if (prtd->state) {
		/* clear the previous setup if any  */
		q6apm_graph_stop(prtd->graph);
		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
	}

	prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
	prtd->pos = 0;
	/* rate and channels are sent to audio driver */
	ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
	if (ret < 0) {
		dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
		return ret;
	}

	ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
	if (ret < 0)
		dev_err(dev, "%s: CMD Format block failed\n", __func__);

	ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
				       (prtd->pcm_size / prtd->periods), prtd->periods);

	if (ret < 0) {
		dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n",	ret);
		return -ENOMEM;
	}

	ret = q6apm_graph_prepare(prtd->graph);
	if (ret) {
		dev_err(dev, "Failed to prepare Graph %d\n", ret);
		return ret;
	}

	ret = q6apm_graph_start(prtd->graph);
	if (ret) {
		dev_err(dev, "Failed to Start Graph %d\n", ret);
		return ret;
	}

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		int i;
		/* Queue the buffers for Capture ONLY after graph is started */
		for (i = 0; i < runtime->periods; i++)
			q6apm_read(prtd->graph);

	}

	/* Now that graph as been prepared and started update the internal state accordingly */
	prtd->state = Q6APM_STREAM_RUNNING;

	return 0;
}

static int q6apm_dai_trigger(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream, int cmd)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		 /* start writing buffers for playback only as we already queued capture buffers */
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		/* TODO support be handled via SoftPause Module */
		prtd->state = Q6APM_STREAM_STOPPED;
		break;
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int q6apm_dai_open(struct snd_soc_component *component,
			  struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(soc_prtd, 0);
	struct device *dev = component->dev;
	struct q6apm_dai_data *pdata;
	struct q6apm_dai_rtd *prtd;
	int graph_id, ret;

	graph_id = cpu_dai->driver->id;

	pdata = snd_soc_component_get_drvdata(component);
	if (!pdata) {
		dev_err(dev, "Drv data not found ..\n");
		return -EINVAL;
	}

	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
	if (prtd == NULL)
		return -ENOMEM;

	spin_lock_init(&prtd->lock);
	prtd->substream = substream;
	prtd->graph = q6apm_graph_open(dev, event_handler, prtd, graph_id);
	if (IS_ERR(prtd->graph)) {
		dev_err(dev, "%s: Could not allocate memory\n", __func__);
		ret = PTR_ERR(prtd->graph);
		goto err;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		runtime->hw = q6apm_dai_hardware_playback;
	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		runtime->hw = q6apm_dai_hardware_capture;

	/* Ensure that buffer size is a multiple of period size */
	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0) {
		dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
		goto err;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
						   BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
		if (ret < 0) {
			dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
			goto err;
		}
	}

	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	if (ret < 0) {
		dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
		goto err;
	}

	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
	if (ret < 0) {
		dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
		goto err;
	}

	runtime->private_data = prtd;
	runtime->dma_bytes = BUFFER_BYTES_MAX;
	if (pdata->sid < 0)
		prtd->phys = substream->dma_buffer.addr;
	else
		prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);

	return 0;
err:
	kfree(prtd);

	return ret;
}

static int q6apm_dai_close(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;

	if (prtd->state) { /* only stop graph that is started */
		q6apm_graph_stop(prtd->graph);
		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
	}

	q6apm_graph_close(prtd->graph);
	prtd->graph = NULL;
	kfree(prtd);
	runtime->private_data = NULL;

	return 0;
}

static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
					   struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	snd_pcm_uframes_t ptr;
	unsigned long flags;

	spin_lock_irqsave(&prtd->lock, flags);
	if (prtd->pos == prtd->pcm_size)
		prtd->pos = 0;

	ptr =  bytes_to_frames(runtime, prtd->pos);
	spin_unlock_irqrestore(&prtd->lock, flags);

	return ptr;
}

static int q6apm_dai_hw_params(struct snd_soc_component *component,
			       struct snd_pcm_substream *substream,
			       struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;

	prtd->pcm_size = params_buffer_bytes(params);
	prtd->periods = params_periods(params);

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		prtd->bits_per_sample = 16;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		prtd->bits_per_sample = 24;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd)
{
	int size = BUFFER_BYTES_MAX;

	return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size);
}

static int q6apm_dai_compr_open(struct snd_soc_component *component,
				struct snd_compr_stream *stream)
{
	struct snd_soc_pcm_runtime *rtd = stream->private_data;
	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd;
	struct q6apm_dai_data *pdata;
	struct device *dev = component->dev;
	int ret, size;
	int graph_id;

	graph_id = cpu_dai->driver->id;
	pdata = snd_soc_component_get_drvdata(component);
	if (!pdata)
		return -EINVAL;

	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
	if (prtd == NULL)
		return -ENOMEM;

	prtd->cstream = stream;
	prtd->graph = q6apm_graph_open(dev, event_handler_compr, prtd, graph_id);
	if (IS_ERR(prtd->graph)) {
		ret = PTR_ERR(prtd->graph);
		kfree(prtd);
		return ret;
	}

	runtime->private_data = prtd;
	runtime->dma_bytes = BUFFER_BYTES_MAX;
	size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE * COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
	ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size, &prtd->dma_buffer);
	if (ret)
		return ret;

	if (pdata->sid < 0)
		prtd->phys = prtd->dma_buffer.addr;
	else
		prtd->phys = prtd->dma_buffer.addr | (pdata->sid << 32);

	snd_compr_set_runtime_buffer(stream, &prtd->dma_buffer);
	spin_lock_init(&prtd->lock);

	q6apm_enable_compress_module(dev, prtd->graph, true);
	return 0;
}

static int q6apm_dai_compr_free(struct snd_soc_component *component,
				struct snd_compr_stream *stream)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;

	q6apm_graph_stop(prtd->graph);
	q6apm_unmap_memory_regions(prtd->graph, SNDRV_PCM_STREAM_PLAYBACK);
	q6apm_graph_close(prtd->graph);
	snd_dma_free_pages(&prtd->dma_buffer);
	prtd->graph = NULL;
	kfree(prtd);
	runtime->private_data = NULL;

	return 0;
}

static int q6apm_dai_compr_get_caps(struct snd_soc_component *component,
				    struct snd_compr_stream *stream,
				    struct snd_compr_caps *caps)
{
	caps->direction = SND_COMPRESS_PLAYBACK;
	caps->min_fragment_size = COMPR_PLAYBACK_MIN_FRAGMENT_SIZE;
	caps->max_fragment_size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE;
	caps->min_fragments = COMPR_PLAYBACK_MIN_NUM_FRAGMENTS;
	caps->max_fragments = COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
	caps->num_codecs = 3;
	caps->codecs[0] = SND_AUDIOCODEC_MP3;
	caps->codecs[1] = SND_AUDIOCODEC_AAC;
	caps->codecs[2] = SND_AUDIOCODEC_FLAC;

	return 0;
}

static int q6apm_dai_compr_get_codec_caps(struct snd_soc_component *component,
					  struct snd_compr_stream *stream,
					  struct snd_compr_codec_caps *codec)
{
	switch (codec->codec) {
	case SND_AUDIOCODEC_MP3:
		*codec = q6apm_compr_caps;
		break;
	default:
		break;
	}

	return 0;
}

static int q6apm_dai_compr_pointer(struct snd_soc_component *component,
				   struct snd_compr_stream *stream,
				   struct snd_compr_tstamp *tstamp)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	unsigned long flags;

	spin_lock_irqsave(&prtd->lock, flags);
	tstamp->copied_total = prtd->copied_total;
	tstamp->byte_offset = prtd->copied_total % prtd->pcm_size;
	spin_unlock_irqrestore(&prtd->lock, flags);

	return 0;
}

static int q6apm_dai_compr_trigger(struct snd_soc_component *component,
			    struct snd_compr_stream *stream, int cmd)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, NO_TIMESTAMP);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		break;
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		break;
	case SND_COMPR_TRIGGER_NEXT_TRACK:
		prtd->next_track = true;
		break;
	case SND_COMPR_TRIGGER_DRAIN:
	case SND_COMPR_TRIGGER_PARTIAL_DRAIN:
		prtd->notify_on_drain = true;
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int q6apm_dai_compr_ack(struct snd_soc_component *component, struct snd_compr_stream *stream,
			size_t count)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	unsigned long flags;

	spin_lock_irqsave(&prtd->lock, flags);
	prtd->bytes_received += count;
	spin_unlock_irqrestore(&prtd->lock, flags);

	return count;
}

static int q6apm_dai_compr_set_params(struct snd_soc_component *component,
				      struct snd_compr_stream *stream,
				      struct snd_compr_params *params)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	struct q6apm_dai_data *pdata;
	struct audioreach_module_config cfg;
	struct snd_codec *codec = &params->codec;
	int dir = stream->direction;
	int ret;

	pdata = snd_soc_component_get_drvdata(component);
	if (!pdata)
		return -EINVAL;

	prtd->periods = runtime->fragments;
	prtd->pcm_count = runtime->fragment_size;
	prtd->pcm_size = runtime->fragments * runtime->fragment_size;
	prtd->bits_per_sample = 16;

	prtd->pos = 0;

	if (prtd->next_track != true) {
		memcpy(&prtd->codec, codec, sizeof(*codec));

		ret = q6apm_set_real_module_id(component->dev, prtd->graph, codec->id);
		if (ret)
			return ret;

		cfg.direction = dir;
		cfg.sample_rate = codec->sample_rate;
		cfg.num_channels = 2;
		cfg.bit_width = prtd->bits_per_sample;
		cfg.fmt = codec->id;
		memcpy(&cfg.codec, codec, sizeof(*codec));

		ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
		if (ret < 0)
			return ret;

		ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
		if (ret)
			return ret;

		ret = q6apm_map_memory_regions(prtd->graph, SNDRV_PCM_STREAM_PLAYBACK,
					       prtd->phys, (prtd->pcm_size / prtd->periods),
					       prtd->periods);
		if (ret < 0)
			return -ENOMEM;

		ret = q6apm_graph_prepare(prtd->graph);
		if (ret)
			return ret;

		ret = q6apm_graph_start(prtd->graph);
		if (ret)
			return ret;

	} else {
		cfg.direction = dir;
		cfg.sample_rate = codec->sample_rate;
		cfg.num_channels = 2;
		cfg.bit_width = prtd->bits_per_sample;
		cfg.fmt = codec->id;
		memcpy(&cfg.codec, codec, sizeof(*codec));

		ret = audioreach_compr_set_param(prtd->graph,  &cfg);
		if (ret < 0)
			return ret;
	}
	prtd->state = Q6APM_STREAM_RUNNING;

	return 0;
}

static int q6apm_dai_compr_set_metadata(struct snd_soc_component *component,
					struct snd_compr_stream *stream,
					struct snd_compr_metadata *metadata)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	int ret = 0;

	switch (metadata->key) {
	case SNDRV_COMPRESS_ENCODER_PADDING:
		prtd->trailing_samples_drop = metadata->value[0];
		q6apm_remove_trailing_silence(component->dev, prtd->graph,
					      prtd->trailing_samples_drop);
		break;
	case SNDRV_COMPRESS_ENCODER_DELAY:
		prtd->initial_samples_drop = metadata->value[0];
		q6apm_remove_initial_silence(component->dev, prtd->graph,
					     prtd->initial_samples_drop);
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int q6apm_dai_compr_mmap(struct snd_soc_component *component,
				struct snd_compr_stream *stream,
				struct vm_area_struct *vma)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	struct device *dev = component->dev;

	return dma_mmap_coherent(dev, vma, prtd->dma_buffer.area, prtd->dma_buffer.addr,
				 prtd->dma_buffer.bytes);
}

static int q6apm_compr_copy(struct snd_soc_component *component,
			    struct snd_compr_stream *stream, char __user *buf,
			    size_t count)
{
	struct snd_compr_runtime *runtime = stream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	void *dstn;
	unsigned long flags;
	size_t copy;
	u32 wflags = 0;
	u32 app_pointer;
	u32 bytes_received;
	uint32_t bytes_to_write;
	int avail, bytes_in_flight = 0;

	bytes_received = prtd->bytes_received;

	/**
	 * Make sure that next track data pointer is aligned at 32 bit boundary
	 * This is a Mandatory requirement from DSP data buffers alignment
	 */
	if (prtd->next_track)
		bytes_received = ALIGN(prtd->bytes_received, prtd->pcm_count);

	app_pointer = bytes_received/prtd->pcm_size;
	app_pointer = bytes_received -  (app_pointer * prtd->pcm_size);
	dstn = prtd->dma_buffer.area + app_pointer;

	if (count < prtd->pcm_size - app_pointer) {
		if (copy_from_user(dstn, buf, count))
			return -EFAULT;
	} else {
		copy = prtd->pcm_size - app_pointer;
		if (copy_from_user(dstn, buf, copy))
			return -EFAULT;
		if (copy_from_user(prtd->dma_buffer.area, buf + copy, count - copy))
			return -EFAULT;
	}

	spin_lock_irqsave(&prtd->lock, flags);
	bytes_in_flight = prtd->bytes_received - prtd->copied_total;

	if (prtd->next_track) {
		prtd->next_track = false;
		prtd->copied_total = ALIGN(prtd->copied_total, prtd->pcm_count);
		prtd->bytes_sent = ALIGN(prtd->bytes_sent, prtd->pcm_count);
	}

	prtd->bytes_received = bytes_received + count;

	/* Kick off the data to dsp if its starving!! */
	if (prtd->state == Q6APM_STREAM_RUNNING && (bytes_in_flight == 0)) {
		bytes_to_write = prtd->pcm_count;
		avail = prtd->bytes_received - prtd->bytes_sent;

		if (avail < prtd->pcm_count)
			bytes_to_write = avail;

		q6apm_write_async(prtd->graph, bytes_to_write, 0, 0, wflags);
		prtd->bytes_sent += bytes_to_write;
	}

	spin_unlock_irqrestore(&prtd->lock, flags);

	return count;
}

static const struct snd_compress_ops q6apm_dai_compress_ops = {
	.open		= q6apm_dai_compr_open,
	.free		= q6apm_dai_compr_free,
	.get_caps	= q6apm_dai_compr_get_caps,
	.get_codec_caps	= q6apm_dai_compr_get_codec_caps,
	.pointer	= q6apm_dai_compr_pointer,
	.trigger	= q6apm_dai_compr_trigger,
	.ack		= q6apm_dai_compr_ack,
	.set_params	= q6apm_dai_compr_set_params,
	.set_metadata	= q6apm_dai_compr_set_metadata,
	.mmap		= q6apm_dai_compr_mmap,
	.copy		= q6apm_compr_copy,
};

static const struct snd_soc_component_driver q6apm_fe_dai_component = {
	.name		= DRV_NAME,
	.open		= q6apm_dai_open,
	.close		= q6apm_dai_close,
	.prepare	= q6apm_dai_prepare,
	.pcm_construct	= q6apm_dai_pcm_new,
	.hw_params	= q6apm_dai_hw_params,
	.pointer	= q6apm_dai_pointer,
	.trigger	= q6apm_dai_trigger,
	.compress_ops	= &q6apm_dai_compress_ops,
	.use_dai_pcm_id = true,
};

static int q6apm_dai_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct q6apm_dai_data *pdata;
	struct of_phandle_args args;
	int rc;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
	if (rc < 0)
		pdata->sid = -1;
	else
		pdata->sid = args.args[0] & SID_MASK_DEFAULT;

	dev_set_drvdata(dev, pdata);

	return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0);
}

#ifdef CONFIG_OF
static const struct of_device_id q6apm_dai_device_id[] = {
	{ .compatible = "qcom,q6apm-dais" },
	{},
};
MODULE_DEVICE_TABLE(of, q6apm_dai_device_id);
#endif

static struct platform_driver q6apm_dai_platform_driver = {
	.driver = {
		.name = "q6apm-dai",
		.of_match_table = of_match_ptr(q6apm_dai_device_id),
	},
	.probe = q6apm_dai_probe,
};
module_platform_driver(q6apm_dai_platform_driver);

MODULE_DESCRIPTION("Q6APM dai driver");
MODULE_LICENSE("GPL");