diff options
| author | Olivier Moysan <olivier.moysan@st.com> | 2019-03-11 16:26:29 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-03-11 16:33:17 +0000 |
| commit | c2dc8b2c114c22d7a04cf26a7c7d04faaa757143 (patch) | |
| tree | 806a33588c4ac1615a54869bd602a84c248124f4 /sound/soc/stm/stm32_i2s.c | |
| parent | 52e7306ca2db565edc1503a74477f3547bc9e408 (diff) | |
ASoC: stm32: i2s: improve channel capabilities handling
Use alsa snd_pcm_hw_constraint_single service to manage
channels restriction. This provides better status on driver
limitations, to the application.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/stm/stm32_i2s.c')
| -rw-r--r-- | sound/soc/stm/stm32_i2s.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c index 783b33497435..06bbbef74b3a 100644 --- a/sound/soc/stm/stm32_i2s.c +++ b/sound/soc/stm/stm32_i2s.c @@ -496,12 +496,6 @@ static int stm32_i2s_configure(struct snd_soc_dai *cpu_dai, unsigned int fthlv; int ret; - if ((params_channels(params) == 1) && - ((i2s->fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_DSP_A)) { - dev_err(cpu_dai->dev, "Mono mode supported only by DSP_A\n"); - return -EINVAL; - } - switch (format) { case 16: cfgr = I2S_CGFR_DATLEN_SET(I2S_I2SMOD_DATLEN_16); @@ -551,6 +545,10 @@ static int stm32_i2s_startup(struct snd_pcm_substream *substream, i2s->substream = substream; spin_unlock_irqrestore(&i2s->irq_lock, flags); + if ((i2s->fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_DSP_A) + snd_pcm_hw_constraint_single(substream->runtime, + SNDRV_PCM_HW_PARAM_CHANNELS, 2); + ret = clk_prepare_enable(i2s->i2sclk); if (ret < 0) { dev_err(cpu_dai->dev, "Failed to enable clock: %d\n", ret); |