[alsa-devel] [PATCH] ASoC: rockchip: rockchip_max98090: Set period size to 240
From stress testing of arecord, we found that period size
greater than ~900 will bring pl330 to DYING state and can not recover within 100 iterations. The result is that arecord will stuck and get I/O error, and issue can not be recovered until reboot.
This issue does not happen when period size is small. Set constraint of period size to 240 to prevent such issue. With the constraint, there will be no issue after 2000 iterations.
We can revert this patch once the root cause is found in rockchip's pl330 implementation.
Signed-off-by: Cheng-Yi Chiang cychiang@chromium.org --- sound/soc/rockchip/rockchip_max98090.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/sound/soc/rockchip/rockchip_max98090.c b/sound/soc/rockchip/rockchip_max98090.c index 7b0c21fa6dca..0097df1fae66 100644 --- a/sound/soc/rockchip/rockchip_max98090.c +++ b/sound/soc/rockchip/rockchip_max98090.c @@ -137,8 +137,19 @@ static int rk_aif1_hw_params(struct snd_pcm_substream *substream, return ret; }
+static int rk_aif1_startup(struct snd_pcm_substream *substream) +{ + /* + * Set period size to 240 because pl330 has issue + * dealing with larger period in stress testing. + */ + return snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 240, 240); +} + static const struct snd_soc_ops rk_aif1_ops = { .hw_params = rk_aif1_hw_params, + .startup = rk_aif1_startup, };
SND_SOC_DAILINK_DEFS(hifi,
The patch
ASoC: rockchip: rockchip_max98090: Set period size to 240
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.3
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 7188f656cdf762d4ea8ce16b6aaf4c6b06e119ec Mon Sep 17 00:00:00 2001
From: Cheng-Yi Chiang cychiang@chromium.org Date: Tue, 13 Aug 2019 15:44:30 +0800 Subject: [PATCH] ASoC: rockchip: rockchip_max98090: Set period size to 240
From stress testing of arecord, we found that period size
greater than ~900 will bring pl330 to DYING state and can not recover within 100 iterations. The result is that arecord will stuck and get I/O error, and issue can not be recovered until reboot.
This issue does not happen when period size is small. Set constraint of period size to 240 to prevent such issue. With the constraint, there will be no issue after 2000 iterations.
We can revert this patch once the root cause is found in rockchip's pl330 implementation.
Signed-off-by: Cheng-Yi Chiang cychiang@chromium.org Link: https://lore.kernel.org/r/20190813074430.191791-1-cychiang@chromium.org Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/rockchip/rockchip_max98090.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/sound/soc/rockchip/rockchip_max98090.c b/sound/soc/rockchip/rockchip_max98090.c index 782e534d4c0d..d54f672d38d8 100644 --- a/sound/soc/rockchip/rockchip_max98090.c +++ b/sound/soc/rockchip/rockchip_max98090.c @@ -138,8 +138,19 @@ static int rk_aif1_hw_params(struct snd_pcm_substream *substream, return ret; }
+static int rk_aif1_startup(struct snd_pcm_substream *substream) +{ + /* + * Set period size to 240 because pl330 has issue + * dealing with larger period in stress testing. + */ + return snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 240, 240); +} + static const struct snd_soc_ops rk_aif1_ops = { .hw_params = rk_aif1_hw_params, + .startup = rk_aif1_startup, };
SND_SOC_DAILINK_DEFS(hifi,
participants (2)
-
Cheng-Yi Chiang -
Mark Brown