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authorCheng-Yi Chiang <cychiang@chromium.org>2019-07-26 12:42:02 +0800
committerMark Brown <broonie@kernel.org>2019-07-26 13:09:31 +0100
commit789e162a6255325325bd321ab0cd51dc7e285054 (patch)
tree4185438d5b16511df99fe11348a3d910715e57ba /sound/soc
parente51b69808b7ec06fc61f5a332f338d94b64b0537 (diff)
ASoC: rockchip: Fix mono capture
This reverts commit db51707b9c9aeedd310ebce60f15d5bb006567e0. Revert "ASoC: rockchip: i2s: Support mono capture" Previous discussion in https://patchwork.kernel.org/patch/10147153/ explains the issue of the patch. While device is configured as 1-ch, hardware is still generating a 2-ch stream. When user space reads the data and assumes it is a 1-ch stream, the rate will be slower by 2x. Revert the change so 1-ch is not supported. User space can selectively take one channel data out of two channel if 1-ch is preferred. Currently, both channels record identical data. Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org> Link: https://lore.kernel.org/r/20190726044202.26866-1-cychiang@chromium.org Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/rockchip/rockchip_i2s.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
index 0a34d0eb8dba..88ebaf6e1880 100644
--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -326,7 +326,6 @@ static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
val |= I2S_CHN_4;
break;
case 2:
- case 1:
val |= I2S_CHN_2;
break;
default:
@@ -459,7 +458,7 @@ static struct snd_soc_dai_driver rockchip_i2s_dai = {
},
.capture = {
.stream_name = "Capture",
- .channels_min = 1,
+ .channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = (SNDRV_PCM_FMTBIT_S8 |
@@ -659,7 +658,7 @@ static int rockchip_i2s_probe(struct platform_device *pdev)
}
if (!of_property_read_u32(node, "rockchip,capture-channels", &val)) {
- if (val >= 1 && val <= 8)
+ if (val >= 2 && val <= 8)
soc_dai->capture.channels_max = val;
}