From: Cheng-Yi Chiang cychiang@chromium.org
[ Upstream commit 789e162a6255325325bd321ab0cd51dc7e285054 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/rockchip/rockchip_i2s.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c index 0a34d0eb8dba9..88ebaf6e1880a 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; }