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ASoC: omap-pcm: Allow only formats with 1, 2, and 4 byte physical size 

sDMA support only transfer elements with 1, 2, and 4 byte physical
size. Initialize the pcm driver accordingly.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jyri Sarha 2015-03-03 13:28:53 +02:00 committed by Mark Brown
parent 5163c1eede
commit 6742e15cf9
1 changed files with 20 additions and 1 deletions
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21
sound/soc/omap/omap-pcm.c
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@ -39,7 +39,7 @@
#define pcm_omap1510() 0
#endif
static const struct snd_pcm_hardware omap_pcm_hardware = {
static struct snd_pcm_hardware omap_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
@ -53,6 +53,24 @@ static const struct snd_pcm_hardware omap_pcm_hardware = {
.buffer_bytes_max = 128 * 1024,
};
/* sDMA supports only 1, 2, and 4 byte transfer elements. */
static void omap_pcm_limit_supported_formats(void)
{
int i;
for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
switch (snd_pcm_format_physical_width(i)) {
case 8:
case 16:
case 32:
omap_pcm_hardware.formats |= (1LL << i);
break;
default:
break;
}
}
}
/* this may get called several times by oss emulation */
static int omap_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
@ -235,6 +253,7 @@ static struct snd_soc_platform_driver omap_soc_platform = {
int omap_pcm_platform_register(struct device *dev)
{
omap_pcm_limit_supported_formats();
return devm_snd_soc_register_platform(dev, &omap_soc_platform);
}
EXPORT_SYMBOL_GPL(omap_pcm_platform_register);