diff options
| author | Brent Lu <brent.lu@intel.com> | 2020-04-28 01:13:34 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-04-28 14:58:51 +0100 |
| commit | ad18763f46835b768714ac6de6dcf42384a261ca (patch) | |
| tree | f85da94faaa557bcb45ce8467c11d91ba7ad25c3 /sound/soc/intel | |
| parent | 08d6713a4056cab5b29eb135eecb2e97492fc8d8 (diff) | |
ASoC: broadwell: 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/1588007614-25061-4-git-send-email-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel')
| -rw-r--r-- | sound/soc/intel/boards/broadwell.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/broadwell.c b/sound/soc/intel/boards/broadwell.c index f9a8336a0541..07b2cfdadaeb 100644 --- a/sound/soc/intel/boards/broadwell.c +++ b/sound/soc/intel/boards/broadwell.c @@ -143,6 +143,31 @@ static int broadwell_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 broadwell_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 broadwell_fe_ops = { + .startup = broadwell_fe_startup, +}; + SND_SOC_DAILINK_DEF(system, DAILINK_COMP_ARRAY(COMP_CPU("System Pin"))); @@ -180,6 +205,7 @@ static struct snd_soc_dai_link broadwell_rt286_dais[] = { .init = broadwell_rtd_init, #endif .trigger = {SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST}, + .ops = &broadwell_fe_ops, .dpcm_playback = 1, .dpcm_capture = 1, SND_SOC_DAILINK_REG(system, dummy, platform), |