[alsa-devel] [PATCH] ASoC: fsl_asrc: old version asrc only support even numbered channels

[Zidan Wang]

The latest asrc's channel bits is 4 bit, the old asrc's channel
bits is 3. For the old version asrc, channel should be a even number.

Signed-off-by: Zidan Wang <zidan.wang at freescale.com>
---
 sound/soc/fsl/fsl_asrc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index be78dc9..484e46ca 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -113,7 +113,8 @@ static int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
 	if (index == ASRC_INVALID_PAIR) {
 		dev_err(dev, "all pairs are busy now\n");
 		ret = -EBUSY;
-	} else if (asrc_priv->channel_avail < channels) {
+	} else if (asrc_priv->channel_avail < channels ||
+		  (asrc_priv->channel_bits < 4 && channels % 2 != 0)) {
 		dev_err(dev, "can't afford required channels: %d\n", channels);
 		ret = -EINVAL;
 	} else {
-- 
1.9.1