diff options
| author | Brent Lu <brent.lu@intel.com> | 2020-04-28 01:13:32 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-04-28 14:58:49 +0100 |
| commit | e241f8e77958de2b7708e72d7159952d2bd1f0fe (patch) | |
| tree | 41e9a8ddaf0f919ce97f421f93bdd1f9bab8988a | |
| parent | 2d744ecf2b98405723a2138a547e5c75009bc4e5 (diff) | |
ASoC: bdw-rt5677: add channel constraint
BDW boards using this machine driver supports only stereo capture and
playback. 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/1588007614-25061-2-git-send-email-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/intel/boards/bdw-rt5677.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/bdw-rt5677.c b/sound/soc/intel/boards/bdw-rt5677.c index cc41a348295e..5f96d7ac0a22 100644 --- a/sound/soc/intel/boards/bdw-rt5677.c +++ b/sound/soc/intel/boards/bdw-rt5677.c @@ -222,6 +222,31 @@ static int bdw_rt5677_rtd_init(struct snd_soc_pcm_runtime *rtd) } #endif +static const unsigned int channels[] = { + 2, +}; + +static const struct snd_pcm_hw_constraint_list constraints_channels = { + .count = ARRAY_SIZE(channels), + .list = channels, + .mask = 0, +}; + +static int bdw_rt5677_fe_startup(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + /* Board supports stereo configuration only */ + runtime->hw.channels_max = 2; + return snd_pcm_hw_constraint_list(runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, + &constraints_channels); +} + +static const struct snd_soc_ops bdw_rt5677_fe_ops = { + .startup = bdw_rt5677_fe_startup, +}; + static int bdw_rt5677_init(struct snd_soc_pcm_runtime *rtd) { struct bdw_rt5677_priv *bdw_rt5677 = @@ -321,6 +346,7 @@ static struct snd_soc_dai_link bdw_rt5677_dais[] = { }, .dpcm_capture = 1, .dpcm_playback = 1, + .ops = &bdw_rt5677_fe_ops, SND_SOC_DAILINK_REG(fe, dummy, platform), }, |