diff options
| author | Jyri Sarha <jsarha@ti.com> | 2015-03-03 12:28:53 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-03-04 18:28:51 +0100 |
| commit | 6742e15cf92a8dc3065843a627952ed518e08267 (patch) | |
| tree | ff6239cae1bbae936de8f27a65254b46bcc27cb4 /sound/soc/omap | |
| parent | ASoC: omap: Kconfig: Support for omap5-uevm analog audio (diff) | |
| download | linux-6742e15cf92a8dc3065843a627952ed518e08267.tar.xz linux-6742e15cf92a8dc3065843a627952ed518e08267.zip | |
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>
Diffstat (limited to 'sound/soc/omap')
| -rw-r--r-- | sound/soc/omap/omap-pcm.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c index f4b05bc23e4b..e49ee2383a88 100644 --- a/sound/soc/omap/omap-pcm.c +++ b/sound/soc/omap/omap-pcm.c @@ -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); |