forked from ~ljy/RK356X_SDK_RELEASE
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hc
2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/sound/soc/fsl/fsl_asrc_dma.c
....@@ -12,17 +12,15 @@
1212 #include <sound/dmaengine_pcm.h>
1313 #include <sound/pcm_params.h>
1414 
15
-#include "fsl_asrc.h"
15
+#include "fsl_asrc_common.h"
1616 
1717 #define FSL_ASRC_DMABUF_SIZE	(256 * 1024)
1818 
19
-static const struct snd_pcm_hardware snd_imx_hardware = {
19
+static struct snd_pcm_hardware snd_imx_hardware = {
2020 	.info = SNDRV_PCM_INFO_INTERLEAVED |
2121 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
2222 		SNDRV_PCM_INFO_MMAP |
23
-		SNDRV_PCM_INFO_MMAP_VALID |
24
-		SNDRV_PCM_INFO_PAUSE |
25
-		SNDRV_PCM_INFO_RESUME,
23
+		SNDRV_PCM_INFO_MMAP_VALID,
2624 	.buffer_bytes_max = FSL_ASRC_DMABUF_SIZE,
2725 	.period_bytes_min = 128,
2826 	.period_bytes_max = 65535, /* Limited by SDMA engine */
....@@ -54,13 +52,12 @@
5452 	snd_pcm_period_elapsed(substream);
5553 }
5654 
57
-static int fsl_asrc_dma_prepare_and_submit(struct snd_pcm_substream *substream)
55
+static int fsl_asrc_dma_prepare_and_submit(struct snd_pcm_substream *substream,
56
+					   struct snd_soc_component *component)
5857 {
5958 	u8 dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? OUT : IN;
60
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
6159 	struct snd_pcm_runtime *runtime = substream->runtime;
6260 	struct fsl_asrc_pair *pair = runtime->private_data;
63
-	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
6461 	struct device *dev = component->dev;
6562 	unsigned long flags = DMA_CTRL_ACK;
6663 
....@@ -97,7 +94,8 @@
9794 	return 0;
9895 }
9996 
100
-static int fsl_asrc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
97
+static int fsl_asrc_dma_trigger(struct snd_soc_component *component,
98
+				struct snd_pcm_substream *substream, int cmd)
10199 {
102100 	struct snd_pcm_runtime *runtime = substream->runtime;
103101 	struct fsl_asrc_pair *pair = runtime->private_data;
....@@ -107,7 +105,7 @@
107105 	case SNDRV_PCM_TRIGGER_START:
108106 	case SNDRV_PCM_TRIGGER_RESUME:
109107 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
110
-		ret = fsl_asrc_dma_prepare_and_submit(substream);
108
+		ret = fsl_asrc_dma_prepare_and_submit(substream, component);
111109 		if (ret)
112110 			return ret;
113111 		dma_async_issue_pending(pair->dma_chan[IN]);
....@@ -126,35 +124,36 @@
126124 	return 0;
127125 }
128126 
129
-static int fsl_asrc_dma_hw_params(struct snd_pcm_substream *substream,
127
+static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
128
+				  struct snd_pcm_substream *substream,
130129 				  struct snd_pcm_hw_params *params)
131130 {
132131 	enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
133
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
132
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
134133 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
135134 	struct snd_dmaengine_dai_dma_data *dma_params_fe = NULL;
136135 	struct snd_dmaengine_dai_dma_data *dma_params_be = NULL;
137
-	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
138136 	struct snd_pcm_runtime *runtime = substream->runtime;
139137 	struct fsl_asrc_pair *pair = runtime->private_data;
140
-	struct fsl_asrc *asrc_priv = pair->asrc_priv;
138
+	struct dma_chan *tmp_chan = NULL, *be_chan = NULL;
139
+	struct snd_soc_component *component_be = NULL;
140
+	struct fsl_asrc *asrc = pair->asrc;
141141 	struct dma_slave_config config_fe, config_be;
142142 	enum asrc_pair_index index = pair->index;
143143 	struct device *dev = component->dev;
144144 	int stream = substream->stream;
145145 	struct imx_dma_data *tmp_data;
146146 	struct snd_soc_dpcm *dpcm;
147
-	struct dma_chan *tmp_chan;
148147 	struct device *dev_be;
149148 	u8 dir = tx ? OUT : IN;
150149 	dma_cap_mask_t mask;
151
-	int ret;
150
+	int ret, width;
152151 
153152 	/* Fetch the Back-End dma_data from DPCM */
154
-	list_for_each_entry(dpcm, &rtd->dpcm[stream].be_clients, list_be) {
153
+	for_each_dpcm_be(rtd, stream, dpcm) {
155154 		struct snd_soc_pcm_runtime *be = dpcm->be;
156155 		struct snd_pcm_substream *substream_be;
157
-		struct snd_soc_dai *dai = be->cpu_dai;
156
+		struct snd_soc_dai *dai = asoc_rtd_to_cpu(be, 0);
158157 
159158 		if (dpcm->fe != rtd)
160159 			continue;
....@@ -171,11 +170,11 @@
171170 	}
172171 
173172 	/* Override dma_data of the Front-End and config its dmaengine */
174
-	dma_params_fe = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
175
-	dma_params_fe->addr = asrc_priv->paddr + REG_ASRDx(!dir, index);
173
+	dma_params_fe = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
174
+	dma_params_fe->addr = asrc->paddr + asrc->get_fifo_addr(!dir, index);
176175 	dma_params_fe->maxburst = dma_params_be->maxburst;
177176 
178
-	pair->dma_chan[!dir] = fsl_asrc_get_dma_channel(pair, !dir);
177
+	pair->dma_chan[!dir] = asrc->get_dma_channel(pair, !dir);
179178 	if (!pair->dma_chan[!dir]) {
180179 		dev_err(dev, "failed to request DMA channel\n");
181180 		return -EINVAL;
....@@ -199,30 +198,66 @@
199198 	dma_cap_set(DMA_SLAVE, mask);
200199 	dma_cap_set(DMA_CYCLIC, mask);
201200 
202
-	/* Get DMA request of Back-End */
203
-	tmp_chan = dma_request_slave_channel(dev_be, tx ? "tx" : "rx");
204
-	tmp_data = tmp_chan->private;
205
-	pair->dma_data.dma_request = tmp_data->dma_request;
206
-	dma_release_channel(tmp_chan);
201
+	/*
202
+	 * The Back-End device might have already requested a DMA channel,
203
+	 * so try to reuse it first, and then request a new one upon NULL.
204
+	 */
205
+	component_be = snd_soc_lookup_component_nolocked(dev_be, SND_DMAENGINE_PCM_DRV_NAME);
206
+	if (component_be) {
207
+		be_chan = soc_component_to_pcm(component_be)->chan[substream->stream];
208
+		tmp_chan = be_chan;
209
+	}
210
+	if (!tmp_chan)
211
+		tmp_chan = dma_request_slave_channel(dev_be, tx ? "tx" : "rx");
207212 
208
-	/* Get DMA request of Front-End */
209
-	tmp_chan = fsl_asrc_get_dma_channel(pair, dir);
210
-	tmp_data = tmp_chan->private;
211
-	pair->dma_data.dma_request2 = tmp_data->dma_request;
212
-	pair->dma_data.peripheral_type = tmp_data->peripheral_type;
213
-	pair->dma_data.priority = tmp_data->priority;
214
-	dma_release_channel(tmp_chan);
213
+	/*
214
+	 * An EDMA DEV_TO_DEV channel is fixed and bound with DMA event of each
215
+	 * peripheral, unlike SDMA channel that is allocated dynamically. So no
216
+	 * need to configure dma_request and dma_request2, but get dma_chan of
217
+	 * Back-End device directly via dma_request_slave_channel.
218
+	 */
219
+	if (!asrc->use_edma) {
220
+		/* Get DMA request of Back-End */
221
+		tmp_data = tmp_chan->private;
222
+		pair->dma_data.dma_request = tmp_data->dma_request;
223
+		if (!be_chan)
224
+			dma_release_channel(tmp_chan);
215225 
216
-	pair->dma_chan[dir] = dma_request_channel(mask, filter, &pair->dma_data);
226
+		/* Get DMA request of Front-End */
227
+		tmp_chan = asrc->get_dma_channel(pair, dir);
228
+		tmp_data = tmp_chan->private;
229
+		pair->dma_data.dma_request2 = tmp_data->dma_request;
230
+		pair->dma_data.peripheral_type = tmp_data->peripheral_type;
231
+		pair->dma_data.priority = tmp_data->priority;
232
+		dma_release_channel(tmp_chan);
233
+
234
+		pair->dma_chan[dir] =
235
+			dma_request_channel(mask, filter, &pair->dma_data);
236
+		pair->req_dma_chan = true;
237
+	} else {
238
+		pair->dma_chan[dir] = tmp_chan;
239
+		/* Do not flag to release if we are reusing the Back-End one */
240
+		pair->req_dma_chan = !be_chan;
241
+	}
242
+
217243 	if (!pair->dma_chan[dir]) {
218244 		dev_err(dev, "failed to request DMA channel for Back-End\n");
219245 		return -EINVAL;
220246 	}
221247 
222
-	if (asrc_priv->asrc_width == 16)
248
+	width = snd_pcm_format_physical_width(asrc->asrc_format);
249
+	if (width < 8 || width > 64)
250
+		return -EINVAL;
251
+	else if (width == 8)
252
+		buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
253
+	else if (width == 16)
223254 		buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
224
-	else
255
+	else if (width == 24)
256
+		buswidth = DMA_SLAVE_BUSWIDTH_3_BYTES;
257
+	else if (width <= 32)
225258 		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
259
+	else
260
+		buswidth = DMA_SLAVE_BUSWIDTH_8_BYTES;
226261 
227262 	config_be.direction = DMA_DEV_TO_DEV;
228263 	config_be.src_addr_width = buswidth;
....@@ -231,17 +266,18 @@
231266 	config_be.dst_maxburst = dma_params_be->maxburst;
232267 
233268 	if (tx) {
234
-		config_be.src_addr = asrc_priv->paddr + REG_ASRDO(index);
269
+		config_be.src_addr = asrc->paddr + asrc->get_fifo_addr(OUT, index);
235270 		config_be.dst_addr = dma_params_be->addr;
236271 	} else {
237
-		config_be.dst_addr = asrc_priv->paddr + REG_ASRDI(index);
272
+		config_be.dst_addr = asrc->paddr + asrc->get_fifo_addr(IN, index);
238273 		config_be.src_addr = dma_params_be->addr;
239274 	}
240275 
241276 	ret = dmaengine_slave_config(pair->dma_chan[dir], &config_be);
242277 	if (ret) {
243278 		dev_err(dev, "failed to config DMA channel for Back-End\n");
244
-		dma_release_channel(pair->dma_chan[dir]);
279
+		if (pair->req_dma_chan)
280
+			dma_release_channel(pair->dma_chan[dir]);
245281 		return ret;
246282 	}
247283 
....@@ -250,69 +286,129 @@
250286 	return 0;
251287 }
252288 
253
-static int fsl_asrc_dma_hw_free(struct snd_pcm_substream *substream)
289
+static int fsl_asrc_dma_hw_free(struct snd_soc_component *component,
290
+				struct snd_pcm_substream *substream)
254291 {
292
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
255293 	struct snd_pcm_runtime *runtime = substream->runtime;
256294 	struct fsl_asrc_pair *pair = runtime->private_data;
295
+	u8 dir = tx ? OUT : IN;
257296 
258297 	snd_pcm_set_runtime_buffer(substream, NULL);
259298 
260
-	if (pair->dma_chan[IN])
261
-		dma_release_channel(pair->dma_chan[IN]);
299
+	if (pair->dma_chan[!dir])
300
+		dma_release_channel(pair->dma_chan[!dir]);
262301 
263
-	if (pair->dma_chan[OUT])
264
-		dma_release_channel(pair->dma_chan[OUT]);
302
+	/* release dev_to_dev chan if we aren't reusing the Back-End one */
303
+	if (pair->dma_chan[dir] && pair->req_dma_chan)
304
+		dma_release_channel(pair->dma_chan[dir]);
265305 
266
-	pair->dma_chan[IN] = NULL;
267
-	pair->dma_chan[OUT] = NULL;
306
+	pair->dma_chan[!dir] = NULL;
307
+	pair->dma_chan[dir] = NULL;
268308 
269309 	return 0;
270310 }
271311 
272
-static int fsl_asrc_dma_startup(struct snd_pcm_substream *substream)
312
+static int fsl_asrc_dma_startup(struct snd_soc_component *component,
313
+				struct snd_pcm_substream *substream)
273314 {
274
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
315
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
316
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
275317 	struct snd_pcm_runtime *runtime = substream->runtime;
276
-	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
318
+	struct snd_dmaengine_dai_dma_data *dma_data;
277319 	struct device *dev = component->dev;
278
-	struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
320
+	struct fsl_asrc *asrc = dev_get_drvdata(dev);
279321 	struct fsl_asrc_pair *pair;
322
+	struct dma_chan *tmp_chan = NULL;
323
+	u8 dir = tx ? OUT : IN;
324
+	bool release_pair = true;
325
+	int ret = 0;
280326 
281
-	pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);
327
+	ret = snd_pcm_hw_constraint_integer(substream->runtime,
328
+					    SNDRV_PCM_HW_PARAM_PERIODS);
329
+	if (ret < 0) {
330
+		dev_err(dev, "failed to set pcm hw params periods\n");
331
+		return ret;
332
+	}
333
+
334
+	pair = kzalloc(sizeof(*pair) + asrc->pair_priv_size, GFP_KERNEL);
282335 	if (!pair)
283336 		return -ENOMEM;
284337 
285
-	pair->asrc_priv = asrc_priv;
338
+	pair->asrc = asrc;
339
+	pair->private = (void *)pair + sizeof(struct fsl_asrc_pair);
286340 
287341 	runtime->private_data = pair;
288342 
289
-	snd_pcm_hw_constraint_integer(substream->runtime,
290
-				      SNDRV_PCM_HW_PARAM_PERIODS);
343
+	/* Request a dummy pair, which will be released later.
344
+	 * Request pair function needs channel num as input, for this
345
+	 * dummy pair, we just request "1" channel temporarily.
346
+	 */
347
+	ret = asrc->request_pair(1, pair);
348
+	if (ret < 0) {
349
+		dev_err(dev, "failed to request asrc pair\n");
350
+		goto req_pair_err;
351
+	}
352
+
353
+	/* Request a dummy dma channel, which will be released later. */
354
+	tmp_chan = asrc->get_dma_channel(pair, dir);
355
+	if (!tmp_chan) {
356
+		dev_err(dev, "failed to get dma channel\n");
357
+		ret = -EINVAL;
358
+		goto dma_chan_err;
359
+	}
360
+
361
+	dma_data = snd_soc_dai_get_dma_data(asoc_rtd_to_cpu(rtd, 0), substream);
362
+
363
+	/* Refine the snd_imx_hardware according to caps of DMA. */
364
+	ret = snd_dmaengine_pcm_refine_runtime_hwparams(substream,
365
+							dma_data,
366
+							&snd_imx_hardware,
367
+							tmp_chan);
368
+	if (ret < 0) {
369
+		dev_err(dev, "failed to refine runtime hwparams\n");
370
+		goto out;
371
+	}
372
+
373
+	release_pair = false;
291374 	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
292375 
293
-	return 0;
376
+out:
377
+	dma_release_channel(tmp_chan);
378
+
379
+dma_chan_err:
380
+	asrc->release_pair(pair);
381
+
382
+req_pair_err:
383
+	if (release_pair)
384
+		kfree(pair);
385
+
386
+	return ret;
294387 }
295388 
296
-static int fsl_asrc_dma_shutdown(struct snd_pcm_substream *substream)
389
+static int fsl_asrc_dma_shutdown(struct snd_soc_component *component,
390
+				 struct snd_pcm_substream *substream)
297391 {
298392 	struct snd_pcm_runtime *runtime = substream->runtime;
299393 	struct fsl_asrc_pair *pair = runtime->private_data;
300
-	struct fsl_asrc *asrc_priv;
394
+	struct fsl_asrc *asrc;
301395 
302396 	if (!pair)
303397 		return 0;
304398 
305
-	asrc_priv = pair->asrc_priv;
399
+	asrc = pair->asrc;
306400 
307
-	if (asrc_priv->pair[pair->index] == pair)
308
-		asrc_priv->pair[pair->index] = NULL;
401
+	if (asrc->pair[pair->index] == pair)
402
+		asrc->pair[pair->index] = NULL;
309403 
310404 	kfree(pair);
311405 
312406 	return 0;
313407 }
314408 
315
-static snd_pcm_uframes_t fsl_asrc_dma_pcm_pointer(struct snd_pcm_substream *substream)
409
+static snd_pcm_uframes_t
410
+fsl_asrc_dma_pcm_pointer(struct snd_soc_component *component,
411
+			 struct snd_pcm_substream *substream)
316412 {
317413 	struct snd_pcm_runtime *runtime = substream->runtime;
318414 	struct fsl_asrc_pair *pair = runtime->private_data;
....@@ -320,17 +416,8 @@
320416 	return bytes_to_frames(substream->runtime, pair->pos);
321417 }
322418 
323
-static const struct snd_pcm_ops fsl_asrc_dma_pcm_ops = {
324
-	.ioctl		= snd_pcm_lib_ioctl,
325
-	.hw_params	= fsl_asrc_dma_hw_params,
326
-	.hw_free	= fsl_asrc_dma_hw_free,
327
-	.trigger	= fsl_asrc_dma_trigger,
328
-	.open		= fsl_asrc_dma_startup,
329
-	.close		= fsl_asrc_dma_shutdown,
330
-	.pointer	= fsl_asrc_dma_pcm_pointer,
331
-};
332
-
333
-static int fsl_asrc_dma_pcm_new(struct snd_soc_pcm_runtime *rtd)
419
+static int fsl_asrc_dma_pcm_new(struct snd_soc_component *component,
420
+				struct snd_soc_pcm_runtime *rtd)
334421 {
335422 	struct snd_card *card = rtd->card->snd_card;
336423 	struct snd_pcm_substream *substream;
....@@ -343,7 +430,7 @@
343430 		return ret;
344431 	}
345432 
346
-	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) {
433
+	for_each_pcm_streams(i) {
347434 		substream = pcm->streams[i].substream;
348435 		if (!substream)
349436 			continue;
....@@ -365,12 +452,13 @@
365452 	return ret;
366453 }
367454 
368
-static void fsl_asrc_dma_pcm_free(struct snd_pcm *pcm)
455
+static void fsl_asrc_dma_pcm_free(struct snd_soc_component *component,
456
+				  struct snd_pcm *pcm)
369457 {
370458 	struct snd_pcm_substream *substream;
371459 	int i;
372460 
373
-	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_LAST; i++) {
461
+	for_each_pcm_streams(i) {
374462 		substream = pcm->streams[i].substream;
375463 		if (!substream)
376464 			continue;
....@@ -383,8 +471,13 @@
383471 
384472 struct snd_soc_component_driver fsl_asrc_component = {
385473 	.name		= DRV_NAME,
386
-	.ops		= &fsl_asrc_dma_pcm_ops,
387
-	.pcm_new	= fsl_asrc_dma_pcm_new,
388
-	.pcm_free	= fsl_asrc_dma_pcm_free,
474
+	.hw_params	= fsl_asrc_dma_hw_params,
475
+	.hw_free	= fsl_asrc_dma_hw_free,
476
+	.trigger	= fsl_asrc_dma_trigger,
477
+	.open		= fsl_asrc_dma_startup,
478
+	.close		= fsl_asrc_dma_shutdown,
479
+	.pointer	= fsl_asrc_dma_pcm_pointer,
480
+	.pcm_construct	= fsl_asrc_dma_pcm_new,
481
+	.pcm_destruct	= fsl_asrc_dma_pcm_free,
389482 };
390483 EXPORT_SYMBOL_GPL(fsl_asrc_component);