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ASoC: meson: Use managed DMA buffer allocation 

Using a managed buffer will pre-allocate the buffer using
snd_pcm_lib_preallocate_pages() and automatically free it when the PCM is
destroyed.

In addition it will call snd_pcm_lib_malloc_pages() before the driver's
hw_params() callback and snd_pcm_lib_free_pages() after the driver's
hw_free() callback.

This slightly reduces the boilerplate code of the driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Tested-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20201218154544.25513-1-lars@metafoo.de
Signed-off-by: Mark Brown <broonie@kernel.org>
master
Lars-Peter Clausen 2020-12-18 16:45:44 +01:00 committed by Mark Brown
parent 57fc2bbc62
commit e05cde84ea
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 2 additions and 18 deletions
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1
sound/soc/meson/aiu-fifo-i2s.c
View File

@ -124,7 +124,6 @@ const struct snd_soc_dai_ops aiu_fifo_i2s_dai_ops = {
.trigger = aiu_fifo_i2s_trigger,
.prepare = aiu_fifo_i2s_prepare,
.hw_params = aiu_fifo_i2s_hw_params,
.hw_free = aiu_fifo_hw_free,
.startup = aiu_fifo_startup,
.shutdown = aiu_fifo_shutdown,
};

1
sound/soc/meson/aiu-fifo-spdif.c
View File

@ -158,7 +158,6 @@ const struct snd_soc_dai_ops aiu_fifo_spdif_dai_ops = {
.trigger = fifo_spdif_trigger,
.prepare = fifo_spdif_prepare,
.hw_params = fifo_spdif_hw_params,
.hw_free = aiu_fifo_hw_free,
.startup = aiu_fifo_startup,
.shutdown = aiu_fifo_shutdown,
};

18
sound/soc/meson/aiu-fifo.c
View File

@ -99,11 +99,6 @@ int aiu_fifo_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_component *component = dai->component;
struct aiu_fifo *fifo = dai->playback_dma_data;
dma_addr_t end;
int ret;
ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
if (ret < 0)
return ret;
/* Setup the fifo boundaries */
end = runtime->dma_addr + runtime->dma_bytes - fifo->fifo_block;
@ -124,12 +119,6 @@ int aiu_fifo_hw_params(struct snd_pcm_substream *substream,
return 0;
}
int aiu_fifo_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return snd_pcm_lib_free_pages(substream);
}
static irqreturn_t aiu_fifo_isr(int irq, void *dev_id)
{
struct snd_pcm_substream *playback = dev_id;
@ -187,15 +176,12 @@ void aiu_fifo_shutdown(struct snd_pcm_substream *substream,
int aiu_fifo_pcm_new(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_dai *dai)
{
struct snd_pcm_substream *substream =
rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
struct snd_card *card = rtd->card->snd_card;
struct aiu_fifo *fifo = dai->playback_dma_data;
size_t size = fifo->pcm->buffer_bytes_max;
snd_pcm_lib_preallocate_pages(substream,
SNDRV_DMA_TYPE_DEV,
card->dev, size, size);
snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
card->dev, size, size);
return 0;
}