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ASoC: rockchip: multi_dais_pcm: skip the device that has no channel

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Example:
dais = <&i2s1_8ch>, <&pdm>;
capture,channel-mapping = <2 4>;
playback,channel-mapping = <2 0>;

The pdm has no playback channel. It cannot be set as master_chan.

Signed-off-by: Jason Zhu <jason.zhu@rock-chips.com>
Change-Id: I8e1dd679f99d3b60074f12a6b1c8f880bcad35c4
This commit is contained in:
Jason Zhu
2022-08-24 11:49:15 +08:00
committed by Tao Huang
parent a50fb57df2
commit 53a35b1245
1 changed files with 15 additions and 1 deletions
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16
sound/soc/rockchip/rockchip_multi_dais_pcm.c
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@@ -119,6 +119,18 @@ static void dmaengine_mpcm_dma_complete(void *arg)
snd_pcm_period_elapsed(substream);
}
static void dmaengine_mpcm_get_master_chan(struct dmaengine_mpcm_runtime_data *prtd)
{
int i;
for (i = prtd->num_chans; i > 0; i--) {
if (prtd->chans[i - 1]) {
prtd->master_chan = i - 1;
break;
}
}
}
static int dmaengine_mpcm_prepare_and_submit(struct snd_pcm_substream *substream)
{
struct dmaengine_mpcm_runtime_data *prtd = substream_to_prtd(substream);
@@ -157,7 +169,9 @@ static int dmaengine_mpcm_prepare_and_submit(struct snd_pcm_substream *substream
if (desc) {
desc->callback = dmaengine_mpcm_dma_complete;
desc->callback_param = substream;
prtd->master_chan = i - 1;
dmaengine_mpcm_get_master_chan(prtd);
} else {
return -ENOMEM;
}
return 0;