| Message ID | 20240905-alsa-12-24-128-v1-12-8371948d3921@baylibre.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | ALSA: update sample rate definitions | expand |
On Thu, Sep 05, 2024 at 04:13:03PM +0200, Jerome Brunet wrote: > The cs35l34 adds a useless rate constraint on startup. > It does not set SNDRV_PCM_RATE_KNOT and the rates set are already a subset > of the ones provided in the constraint list, so it is a no-op. > > >From the rest of the code, it is likely HW supports more than the 32, 44.1 > and 48kHz listed in CS35L34_RATES but there is no way to know for sure > without proper documentation. > > Keep the driver as it is for now and just drop the useless constraint. > > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> > --- Yeah according to the datasheet it should support all the rates listed in the cs35l34_src_rates list. But given the weird way that CS35L34_RATES is implemented I think you are right best to leave it as it is for now, incase there was a reason. Perhaps if I find some time I might see if I have one in a draw somewhere in the future. Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Thanks, Charles > sound/soc/codecs/cs35l34.c | 21 --------------------- > 1 file changed, 21 deletions(-) > > diff --git a/sound/soc/codecs/cs35l34.c b/sound/soc/codecs/cs35l34.c > index e63a518e3b8e..287b27476a10 100644 > --- a/sound/soc/codecs/cs35l34.c > +++ b/sound/soc/codecs/cs35l34.c > @@ -562,26 +562,6 @@ static int cs35l34_pcm_hw_params(struct snd_pcm_substream *substream, > return ret; > } > > -static const unsigned int cs35l34_src_rates[] = { > - 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 > -}; > - > - > -static const struct snd_pcm_hw_constraint_list cs35l34_constraints = { > - .count = ARRAY_SIZE(cs35l34_src_rates), > - .list = cs35l34_src_rates, > -}; > - > -static int cs35l34_pcm_startup(struct snd_pcm_substream *substream, > - struct snd_soc_dai *dai) > -{ > - > - snd_pcm_hw_constraint_list(substream->runtime, 0, > - SNDRV_PCM_HW_PARAM_RATE, &cs35l34_constraints); > - return 0; > -} > - > - > static int cs35l34_set_tristate(struct snd_soc_dai *dai, int tristate) > { > > @@ -639,7 +619,6 @@ static int cs35l34_dai_set_sysclk(struct snd_soc_dai *dai, > } > > static const struct snd_soc_dai_ops cs35l34_ops = { > - .startup = cs35l34_pcm_startup, > .set_tristate = cs35l34_set_tristate, > .set_fmt = cs35l34_set_dai_fmt, > .hw_params = cs35l34_pcm_hw_params, > > -- > 2.45.2 >
diff --git a/sound/soc/codecs/cs35l34.c b/sound/soc/codecs/cs35l34.c index e63a518e3b8e..287b27476a10 100644 --- a/sound/soc/codecs/cs35l34.c +++ b/sound/soc/codecs/cs35l34.c @@ -562,26 +562,6 @@ static int cs35l34_pcm_hw_params(struct snd_pcm_substream *substream, return ret; } -static const unsigned int cs35l34_src_rates[] = { - 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 -}; - - -static const struct snd_pcm_hw_constraint_list cs35l34_constraints = { - .count = ARRAY_SIZE(cs35l34_src_rates), - .list = cs35l34_src_rates, -}; - -static int cs35l34_pcm_startup(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - - snd_pcm_hw_constraint_list(substream->runtime, 0, - SNDRV_PCM_HW_PARAM_RATE, &cs35l34_constraints); - return 0; -} - - static int cs35l34_set_tristate(struct snd_soc_dai *dai, int tristate) { @@ -639,7 +619,6 @@ static int cs35l34_dai_set_sysclk(struct snd_soc_dai *dai, } static const struct snd_soc_dai_ops cs35l34_ops = { - .startup = cs35l34_pcm_startup, .set_tristate = cs35l34_set_tristate, .set_fmt = cs35l34_set_dai_fmt, .hw_params = cs35l34_pcm_hw_params,
The cs35l34 adds a useless rate constraint on startup. It does not set SNDRV_PCM_RATE_KNOT and the rates set are already a subset of the ones provided in the constraint list, so it is a no-op. From the rest of the code, it is likely HW supports more than the 32, 44.1 and 48kHz listed in CS35L34_RATES but there is no way to know for sure without proper documentation. Keep the driver as it is for now and just drop the useless constraint. Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- sound/soc/codecs/cs35l34.c | 21 --------------------- 1 file changed, 21 deletions(-)