ALSA: pxa2xx: Use managed PCM buffer allocation

Now with the recent addition of WC buffer allocation support, we can
use the standard PCM buffer allocation helpers for pxa2xx drivers.
This allows us to remove lots of superfluous code.

Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210802072815.13551-6-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/pxa2xx-lib.h

@@ -14,18 +14,12 @@ struct snd_soc_component;
 
 extern int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params);
-extern int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream);
 extern int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd);
 extern snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream);
 extern int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream);
 extern int pxa2xx_pcm_open(struct snd_pcm_substream *substream);
 extern int pxa2xx_pcm_close(struct snd_pcm_substream *substream);
-extern int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
-	struct vm_area_struct *vma);
-extern int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream);
-extern void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm);
-extern void pxa2xx_soc_pcm_free(struct snd_soc_component *component,
-				struct snd_pcm *pcm);
+extern int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm);
 extern int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
 			      struct snd_soc_pcm_runtime *rtd);
 extern int pxa2xx_soc_pcm_open(struct snd_soc_component *component,
@@ -35,8 +29,6 @@ extern int pxa2xx_soc_pcm_close(struct snd_soc_component *component,
 extern int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
 				    struct snd_pcm_substream *substream,
 				    struct snd_pcm_hw_params *params);
-extern int pxa2xx_soc_pcm_hw_free(struct snd_soc_component *component,
-				  struct snd_pcm_substream *substream);
 extern int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
 				  struct snd_pcm_substream *substream);
 extern int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
@@ -44,9 +36,6 @@ extern int pxa2xx_soc_pcm_trigger(struct snd_soc_component *component,
 extern snd_pcm_uframes_t
 pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
 		       struct snd_pcm_substream *substream);
-extern int pxa2xx_soc_pcm_mmap(struct snd_soc_component *component,
-			       struct snd_pcm_substream *substream,
-			       struct vm_area_struct *vma);
 
 /* AC97 */
 

sound/arm/pxa2xx-ac97.c

@@ -172,38 +172,28 @@ static const struct snd_pcm_ops pxa2xx_ac97_pcm_ops = {
 	.open		= pxa2xx_ac97_pcm_open,
 	.close		= pxa2xx_ac97_pcm_close,
 	.hw_params	= pxa2xx_pcm_hw_params,
-	.hw_free	= pxa2xx_pcm_hw_free,
 	.prepare	= pxa2xx_ac97_pcm_prepare,
 	.trigger	= pxa2xx_pcm_trigger,
 	.pointer	= pxa2xx_pcm_pointer,
-	.mmap		= pxa2xx_pcm_mmap,
 };
 
 
 static int pxa2xx_ac97_pcm_new(struct snd_card *card)
 {
 	struct snd_pcm *pcm;
-	int stream, ret;
+	int ret;
 
 	ret = snd_pcm_new(card, "PXA2xx-PCM", 0, 1, 1, &pcm);
 	if (ret)
 		goto out;
 
-	pcm->private_free = pxa2xx_pcm_free_dma_buffers;
-
 	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
 	if (ret)
 		goto out;
 
-	stream = SNDRV_PCM_STREAM_PLAYBACK;
-	snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
-	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
-	if (ret)
-		goto out;
-
-	stream = SNDRV_PCM_STREAM_CAPTURE;
-	snd_pcm_set_ops(pcm, stream, &pxa2xx_ac97_pcm_ops);
-	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pxa2xx_ac97_pcm_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pxa2xx_ac97_pcm_ops);
+	ret = pxa2xx_pcm_preallocate_dma_buffer(pcm);
 	if (ret)
 		goto out;
 

sound/arm/pxa2xx-pcm-lib.c

@@ -54,19 +54,10 @@ int pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
 	if (ret)
 		return ret;
 
-	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-
 	return 0;
 }
 EXPORT_SYMBOL(pxa2xx_pcm_hw_params);
 
-int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
-{
-	snd_pcm_set_runtime_buffer(substream, NULL);
-	return 0;
-}
-EXPORT_SYMBOL(pxa2xx_pcm_hw_free);
-
 int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
 	return snd_dmaengine_pcm_trigger(substream, cmd);
@@ -131,57 +122,15 @@ int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
 }
 EXPORT_SYMBOL(pxa2xx_pcm_close);
 
-int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
-	struct vm_area_struct *vma)
+int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	return dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area,
-			   runtime->dma_addr, runtime->dma_bytes);
-}
-EXPORT_SYMBOL(pxa2xx_pcm_mmap);
-
-int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
-	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
-	struct snd_dma_buffer *buf = &substream->dma_buffer;
 	size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
-	buf->dev.type = SNDRV_DMA_TYPE_DEV;
-	buf->dev.dev = pcm->card->dev;
-	buf->private_data = NULL;
-	buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL);
-	if (!buf->area)
-		return -ENOMEM;
-	buf->bytes = size;
-	return 0;
+
+	return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
+					    pcm->card->dev, size);
 }
 EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
 
-void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
-{
-	struct snd_pcm_substream *substream;
-	struct snd_dma_buffer *buf;
-	int stream;
-
-	for (stream = 0; stream < 2; stream++) {
-		substream = pcm->streams[stream].substream;
-		if (!substream)
-			continue;
-		buf = &substream->dma_buffer;
-		if (!buf->area)
-			continue;
-		dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr);
-		buf->area = NULL;
-	}
-}
-EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers);
-
-void pxa2xx_soc_pcm_free(struct snd_soc_component *component,
-			 struct snd_pcm *pcm)
-{
-	pxa2xx_pcm_free_dma_buffers(pcm);
-}
-EXPORT_SYMBOL(pxa2xx_soc_pcm_free);
-
 int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
 		       struct snd_soc_pcm_runtime *rtd)
 {
@@ -193,21 +142,7 @@ int pxa2xx_soc_pcm_new(struct snd_soc_component *component,
 	if (ret)
 		return ret;
 
-	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
-		ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
-			SNDRV_PCM_STREAM_PLAYBACK);
-		if (ret)
-			goto out;
-	}
-
-	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
-		ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
-			SNDRV_PCM_STREAM_CAPTURE);
-		if (ret)
-			goto out;
-	}
- out:
-	return ret;
+	return pxa2xx_pcm_preallocate_dma_buffer(pcm);
 }
 EXPORT_SYMBOL(pxa2xx_soc_pcm_new);
 
@@ -233,13 +168,6 @@ int pxa2xx_soc_pcm_hw_params(struct snd_soc_component *component,
 }
 EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_params);
 
-int pxa2xx_soc_pcm_hw_free(struct snd_soc_component *component,
-			   struct snd_pcm_substream *substream)
-{
-	return pxa2xx_pcm_hw_free(substream);
-}
-EXPORT_SYMBOL(pxa2xx_soc_pcm_hw_free);
-
 int pxa2xx_soc_pcm_prepare(struct snd_soc_component *component,
 			   struct snd_pcm_substream *substream)
 {
@@ -262,14 +190,6 @@ pxa2xx_soc_pcm_pointer(struct snd_soc_component *component,
 }
 EXPORT_SYMBOL(pxa2xx_soc_pcm_pointer);
 
-int pxa2xx_soc_pcm_mmap(struct snd_soc_component *component,
-			struct snd_pcm_substream *substream,
-			struct vm_area_struct *vma)
-{
-	return pxa2xx_pcm_mmap(substream, vma);
-}
-EXPORT_SYMBOL(pxa2xx_soc_pcm_mmap);
-
 MODULE_AUTHOR("Nicolas Pitre");
 MODULE_DESCRIPTION("Intel PXA2xx sound library");
 MODULE_LICENSE("GPL");

sound/soc/pxa/pxa-ssp.c

@@ -850,15 +850,12 @@ static struct snd_soc_dai_driver pxa_ssp_dai = {
 static const struct snd_soc_component_driver pxa_ssp_component = {
 	.name		= "pxa-ssp",
 	.pcm_construct	= pxa2xx_soc_pcm_new,
-	.pcm_destruct	= pxa2xx_soc_pcm_free,
 	.open		= pxa2xx_soc_pcm_open,
 	.close		= pxa2xx_soc_pcm_close,
 	.hw_params	= pxa2xx_soc_pcm_hw_params,
-	.hw_free	= pxa2xx_soc_pcm_hw_free,
 	.prepare	= pxa2xx_soc_pcm_prepare,
 	.trigger	= pxa2xx_soc_pcm_trigger,
 	.pointer	= pxa2xx_soc_pcm_pointer,
-	.mmap		= pxa2xx_soc_pcm_mmap,
 	.suspend	= pxa_ssp_suspend,
 	.resume		= pxa_ssp_resume,
 };

sound/soc/pxa/pxa2xx-ac97.c

@@ -202,15 +202,12 @@ static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
 static const struct snd_soc_component_driver pxa_ac97_component = {
 	.name		= "pxa-ac97",
 	.pcm_construct	= pxa2xx_soc_pcm_new,
-	.pcm_destruct	= pxa2xx_soc_pcm_free,
 	.open		= pxa2xx_soc_pcm_open,
 	.close		= pxa2xx_soc_pcm_close,
 	.hw_params	= pxa2xx_soc_pcm_hw_params,
-	.hw_free	= pxa2xx_soc_pcm_hw_free,
 	.prepare	= pxa2xx_soc_pcm_prepare,
 	.trigger	= pxa2xx_soc_pcm_trigger,
 	.pointer	= pxa2xx_soc_pcm_pointer,
-	.mmap		= pxa2xx_soc_pcm_mmap,
 };
 
 #ifdef CONFIG_OF

sound/soc/pxa/pxa2xx-i2s.c

@@ -359,15 +359,12 @@ static struct snd_soc_dai_driver pxa_i2s_dai = {
 static const struct snd_soc_component_driver pxa_i2s_component = {
 	.name		= "pxa-i2s",
 	.pcm_construct	= pxa2xx_soc_pcm_new,
-	.pcm_destruct	= pxa2xx_soc_pcm_free,
 	.open		= pxa2xx_soc_pcm_open,
 	.close		= pxa2xx_soc_pcm_close,
 	.hw_params	= pxa2xx_soc_pcm_hw_params,
-	.hw_free	= pxa2xx_soc_pcm_hw_free,
 	.prepare	= pxa2xx_soc_pcm_prepare,
 	.trigger	= pxa2xx_soc_pcm_trigger,
 	.pointer	= pxa2xx_soc_pcm_pointer,
-	.mmap		= pxa2xx_soc_pcm_mmap,
 	.suspend	= pxa2xx_soc_pcm_suspend,
 	.resume		= pxa2xx_soc_pcm_resume,
 };

sound/soc/pxa/pxa2xx-pcm.c

@@ -19,15 +19,12 @@
 
 static const struct snd_soc_component_driver pxa2xx_soc_platform = {
 	.pcm_construct	= pxa2xx_soc_pcm_new,
-	.pcm_destruct	= pxa2xx_soc_pcm_free,
 	.open		= pxa2xx_soc_pcm_open,
 	.close		= pxa2xx_soc_pcm_close,
 	.hw_params	= pxa2xx_soc_pcm_hw_params,
-	.hw_free	= pxa2xx_soc_pcm_hw_free,
 	.prepare	= pxa2xx_soc_pcm_prepare,
 	.trigger	= pxa2xx_soc_pcm_trigger,
 	.pointer	= pxa2xx_soc_pcm_pointer,
-	.mmap		= pxa2xx_soc_pcm_mmap,
 };
 
 static int pxa2xx_soc_platform_probe(struct platform_device *pdev)