[alsa-devel] [PATCH] ASoC: omap-mcpdm: Set constraint for 24 msb
OMAP McPDM supports 24 msb in the 32 bit sample. Make sure that applications get this information.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@ti.com --- sound/soc/omap/omap-mcpdm.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c index 0e25df4..50d758a 100644 --- a/sound/soc/omap/omap-mcpdm.c +++ b/sound/soc/omap/omap-mcpdm.c @@ -265,6 +265,8 @@ static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
mutex_lock(&mcpdm->mutex);
+ snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24); + if (!dai->active) { /* Enable watch dog for ES above ES 1.0 to avoid saturation */ if (omap_rev() != OMAP4430_REV_ES1_0) {
On Sat, Jan 14, 2012 at 05:16:43PM +0100, Peter Ujfalusi wrote:
OMAP McPDM supports 24 msb in the 32 bit sample. Make sure that applications get this information.
This is actually a pretty widespread configuration for hardware - I'd guess most devices that support 32 bit DAI formats don't actually use all 32 bits. If this is really useful to applications we should add a framework feature letting drivers just set a number rather than adding code individual drivers, I'll send a patch shortly adding a feature for this.
participants (2)
-
Mark Brown -
Peter Ujfalusi