diff options
| author | Chen Liangjun <b36089@freescale.com> | 2012-08-16 17:14:37 +0800 |
|---|---|---|
| committer | Chen Liangjun <b36089@freescale.com> | 2012-08-16 18:20:08 +0800 |
| commit | 72b2444cbe32f2b7bf7c99323a1dd5d3b34e9098 (patch) | |
| tree | 1c17bcf2e590be97ceb9aedf76ef1b87cc35e094 /sound | |
| parent | 4c22c9922e81904410d8f97065a267dee7b99380 (diff) | |
ENGR00219931 ESAI ASRC: fix channel swap bug while playback 6 channel
Channel swap caused by 2 reason:
1. To avoid ASRC underflow error, ASRC driver would prefill ASRC input
FIFO with 160 samples. However, 160 can't be divided by 6. In this case,
channel data miss alignment. In this patch, prefill ASRC input
FIFO with 120, which can be divided by 2,4,6,8.
2. While start P2P playback, ESAI driver would first start SDMA, then
ASRC, and last ESAI. While start ESAI, the data is not ready, thus ESAI
underrun would happens and channel data miss alignment. In this patch,
delay 1 ms between ASRC's start and ESAI's start.
Signed-off-by: Chen Liangjun <b36089@freescale.com>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/imx/imx-pcm-dma-mx2.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-pcm-dma-mx2.c b/sound/soc/imx/imx-pcm-dma-mx2.c index b36b28108049..ad8d5a3329c7 100644 --- a/sound/soc/imx/imx-pcm-dma-mx2.c +++ b/sound/soc/imx/imx-pcm-dma-mx2.c @@ -359,6 +359,7 @@ static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) dmaengine_submit(iprtd->asrc_p2p_desc); dmaengine_submit(iprtd->asrc_desc); asrc_start_conv(iprtd->asrc_index); + mdelay(1); } else { dmaengine_submit(iprtd->desc); } |