The patch
ASoC: stm32: i2s: improve channel capabilities handling
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From c2dc8b2c114c22d7a04cf26a7c7d04faaa757143 Mon Sep 17 00:00:00 2001
From: Olivier Moysan olivier.moysan@st.com Date: Mon, 11 Mar 2019 16:26:29 +0100 Subject: [PATCH] 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 --- sound/soc/stm/stm32_i2s.c | 10 ++++------ 1 file 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);