On 03/03/2015 01:28 PM, Jyri Sarha wrote:
> sDMA support only transfer elements with 1, 2, and 4 byte physical
> size. Initialize the pcm driver accordingly.
Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
>
> Signed-off-by: Jyri Sarha <jsarha@xxxxxx>
> ---
> sound/soc/omap/omap-pcm.c | 21 ++++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
> index f4b05bc..e49ee23 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);
>
--
Péter
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