diff options
author | Brent Lu <brent.lu@intel.com> | 2020-04-28 01:13:33 +0800 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2020-04-28 14:58:50 +0100 |
commit | 08d6713a4056cab5b29eb135eecb2e97492fc8d8 (patch) | |
tree | 3bd5279be6f89dc64c685b8c2c4c11f20897be53 /sound/soc/intel/boards/bdw-rt5650.c | |
parent | e241f8e77958de2b7708e72d7159952d2bd1f0fe (diff) | |
download | linux-08d6713a4056cab5b29eb135eecb2e97492fc8d8.tar.bz2 |
ASoC: bdw-rt5650: add channel constraint
BDW boards using this machine driver supports only 2 or 4-channel capture.
Implement a constraint to enforce it.
Signed-off-by: Brent Lu <brent.lu@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/1588007614-25061-3-git-send-email-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel/boards/bdw-rt5650.c')
-rw-r--r-- | sound/soc/intel/boards/bdw-rt5650.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/bdw-rt5650.c b/sound/soc/intel/boards/bdw-rt5650.c index af2f50293208..a97e912adf4b 100644 --- a/sound/soc/intel/boards/bdw-rt5650.c +++ b/sound/soc/intel/boards/bdw-rt5650.c @@ -162,6 +162,34 @@ static int bdw_rt5650_rtd_init(struct snd_soc_pcm_runtime *rtd) } #endif +static const unsigned int channels[] = { + 2, 4, +}; + +static const struct snd_pcm_hw_constraint_list constraints_channels = { + .count = ARRAY_SIZE(channels), + .list = channels, + .mask = 0, +}; + +static int bdw_rt5650_fe_startup(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + /* Board supports stereo and quad configurations for capture */ + if (substream->stream != SNDRV_PCM_STREAM_CAPTURE) + return 0; + + runtime->hw.channels_max = 4; + return snd_pcm_hw_constraint_list(runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, + &constraints_channels); +} + +static const struct snd_soc_ops bdw_rt5650_fe_ops = { + .startup = bdw_rt5650_fe_startup, +}; + static int bdw_rt5650_init(struct snd_soc_pcm_runtime *rtd) { struct bdw_rt5650_priv *bdw_rt5650 = @@ -234,6 +262,7 @@ static struct snd_soc_dai_link bdw_rt5650_dais[] = { .name = "System PCM", .stream_name = "System Playback", .dynamic = 1, + .ops = &bdw_rt5650_fe_ops, #if !IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL) .init = bdw_rt5650_rtd_init, #endif |