domenico/openwrt_NSS_ACW
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sound jz4740_pcm: Don't request dma channel mor then once.

Browse Source 
It is possible that the hw_params callback is called multiple times when using
the oss emulation layer. Thus we need to check whether the dma channel has
already been requested otherwise we'll end up with all dma channels being
requested by sound driver.

SVN-Revision: 20369
This commit is contained in:
Lars-Peter Clausen
2010-03-22 15:22:26 +00:00
parent f4bcf74b95
commit fd3344d488
1 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c
View File

@@ -105,10 +105,11 @@ static int jz4740_pcm_hw_params(struct snd_pcm_substream *substream,
struct jz4740_pcm_config *config; struct jz4740_pcm_config *config;
config = rtd->dai->cpu_dai->dma_data; config = rtd->dai->cpu_dai->dma_data;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { if (!prtd->dma) {
prtd->dma = jz4740_dma_request(substream, "PCM Playback"); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
} else { prtd->dma = jz4740_dma_request(substream, "PCM Playback");
prtd->dma = jz4740_dma_request(substream, "PCM Capture"); else
prtd->dma = jz4740_dma_request(substream, "PCM Capture");
} }
if (!prtd->dma) if (!prtd->dma)