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>

2 files changed, 9 insertions, 99 deletions

diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index a67e6685b00c..c17a19fe59ed 100644
--- a/sound/arm/pxa2xx-ac97.c
+++ b/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;
 
diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
index e81083e1bc68..0a48805e513a 100644
--- a/sound/arm/pxa2xx-pcm-lib.c
+++ b/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);
@@ -131,56 +122,14 @@ 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)
-{
-	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)
+int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm)
 {
-	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;
-}
-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);
+	return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_WC,
+					    pcm->card->dev, size);
 }
-EXPORT_SYMBOL(pxa2xx_soc_pcm_free);
+EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer);
 
 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");