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MLK-15043-2: ASoC: imx-cs42888: fix noise issue with FE-BE case 

The case is "aplay -Dhw:0,1 -d 5 -r 8000 -f S16_LE -c 9 audio8k16b9c.wav",
which is to playback 9 channel bitstream. But the maximum supported channel
of codec is 8, ALSA didn't return error for this case, but continue to
playback.

The reason is that in FE-BE case, ASLA only get the FE's hw parameter for
constraint list, omit the BE's parameter. This patch is to merge BE's
parameter to FE. in this situation with the 9 channel case, ASLA will
return error "aplay: set_params:1303: Channels count non available"

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
(cherry picked from commit cfe36e2e7f)
pull/10/head
Shengjiu Wang 2017-06-14 17:40:17 +08:00 committed by Jason Liu
parent dbaf8cbfd0
commit b21ceed8d4
1 changed files with 1 additions and 0 deletions
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sound/soc/fsl/imx-cs42888.c
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@ -277,6 +277,7 @@ static struct snd_soc_dai_link imx_cs42888_dai[] = {
.ignore_pmdown_time = 1,
.dpcm_playback = 1,
.dpcm_capture = 1,
.dpcm_merged_chan = 1,
},
{
.name = "HiFi-ASRC-BE",