6.14-stable review patch. If anyone has any objections, please let me know.
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From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
commit 3107019501842c27334554ba9d6583b1f200f61f upstream.
DSP expects the periods to be aligned to fragment sizes, currently setting up to hw constriants on periods bytes is not going to work correctly as we can endup with periods sizes aligned to 32 bytes however not aligned to fragment size.
Update the constriants to use fragment size, and also set at step of 10ms for period size to accommodate DSP requirements of 10ms latency.
Fixes: 9b4fe0f1cd79 ("ASoC: qdsp6: audioreach: add q6apm-dai support") Cc: stable@vger.kernel.org Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Tested-by: Johan Hovold johan+linaro@kernel.org Link: https://patch.msgid.link/20250314174800.10142-5-srinivas.kandagatla@linaro.o... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/qcom/qdsp6/q6apm-dai.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/sound/soc/qcom/qdsp6/q6apm-dai.c +++ b/sound/soc/qcom/qdsp6/q6apm-dai.c @@ -385,13 +385,14 @@ static int q6apm_dai_open(struct snd_soc } }
- ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32); + /* setup 10ms latency to accommodate DSP restrictions */ + ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 480); if (ret < 0) { dev_err(dev, "constraint for period bytes step ret = %d\n", ret); goto err; }
- ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32); + ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 480); if (ret < 0) { dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret); goto err;