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7f2430cda8
linux_dsm_epyc7002/sound/soc
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Stephan Gerhold 7f2430cda8
ASoC: qcom: q6asm-dai: Add SNDRV_PCM_INFO_BATCH flag 
At the moment, playing audio with PulseAudio with the qdsp6 driver
results in distorted sound. It seems like its timer-based scheduling
does not work properly with qdsp6 since setting tsched=0 in
the PulseAudio configuration avoids the issue.

Apparently this happens when the pointer() callback is not accurate
enough. There is a SNDRV_PCM_INFO_BATCH flag that can be used to stop
PulseAudio from using timer-based scheduling by default.

According to https://www.alsa-project.org/pipermail/alsa-devel/2014-March/073816.html:

    The flag is being used in the sense explained in the previous audio
    meeting -- the data transfer granularity isn't fine enough but aligned
    to the period size (or less).

q6asm-dai reports the position as multiple of

    prtd->pcm_count = snd_pcm_lib_period_bytes(substream)

so it indeed just a multiple of the period size.

Therefore adding the flag here seems appropriate and makes audio
work out of the box.

Fixes: 2a9e92d371 ("ASoC: qdsp6: q6asm: Add q6asm dai driver")
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200330175210.47518-1-stephan@gerhold.net
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-31 19:23:54 +01:00
..
adi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 177 2019-05-30 11:29:19 -07:00
amd ASoC: AMD: Clear format bits before setting them 2020-03-30 15:32:35 +01:00
atmel ASoC: atmel: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:31 +00:00
au1x ASoC: au1x: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:32 +00:00
bcm ASoC: bcm: Fix pointer cast warning 2020-03-30 15:32:34 +01:00
cirrus ASoC: cirrus: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:34 +00:00
codecs Merge branch 'for-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-5.7 2020-03-27 16:04:55 +00:00
dwc ASoC: dwc: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:35 +00:00
fsl ASoC: fsl: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:36 +00:00
generic ASoC: generic: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:36 +00:00
hisilicon treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 340 2019-06-05 17:37:07 +02:00
img ASoC: img: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:37 +00:00
intel ASoC: Intel: bdw-rt5650: Remove ignore_suspend flag from SSP0 dai link 2020-03-30 18:03:09 +01:00
jz4740 ASoC: jz4740-i2s: Add support for the JZ4770 2020-03-24 17:16:01 +00:00
kirkwood ASoC: kirkwood: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:39 +00:00
mediatek ASoC: mediatek: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:40 +00:00
meson ASoC: meson: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:41 +00:00
mxs ASoC: mxs: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:42 +00:00
pxa Merge series "ASoC: remove rtd->cpu/codec_dai{s}" from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>: 2020-03-27 15:33:10 +00:00
qcom ASoC: qcom: q6asm-dai: Add SNDRV_PCM_INFO_BATCH flag 2020-03-31 19:23:54 +01:00
rockchip ASoC: rockchip: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:45 +00:00
samsung ASoC: samsung: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:45 +00:00
sh ASoC: sh: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:46 +00:00
sirf ASoC: sirf: use devm_platform_ioremap_resource() to simplify code 2019-07-31 12:05:39 +01:00
sof Merge series "ASoC: remove rtd->cpu/codec_dai{s}" from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>: 2020-03-27 15:33:10 +00:00
spear ASoC: spear: use devm_platform_ioremap_resource() to simplify code 2019-07-31 12:06:18 +01:00
sprd ASoC: sprd: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:48 +00:00
sti ASoC: sti: sti_uniperif: move .suspend/.resume to component 2020-01-21 17:04:37 +00:00
stm Merge branch 'for-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-5.7 2020-03-27 16:04:55 +00:00
sunxi ASoC: sunxi: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:50 +00:00
tegra ASoC: tegra: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:51 +00:00
ti ASoC: ti: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:52 +00:00
txx9 ASoC: txx9: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:53 +00:00
uniphier ASoC: uniphier: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:53 +00:00
ux500 ASoC: ux500: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:54 +00:00
xilinx ASoC: xilinx: Use managed buffer allocation 2019-12-11 16:43:25 +00:00
xtensa ASoC: xtensa: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer 2020-03-27 14:44:55 +00:00
zte ASoC: zte: zx-tdm: remove redundant variables dev 2020-03-11 17:59:49 +00:00
Kconfig ASoC: remove w90x900/nuc900 platform drivers 2019-08-12 14:00:29 +01:00
Makefile ASoC: remove w90x900/nuc900 platform drivers 2019-08-12 14:00:29 +01:00
soc-ac97.c
soc-acpi.c ASoC: soc-acpi: fix implicit header use of module.h/export.h 2019-05-08 18:06:28 +09:00
soc-component.c ASoC: soc-component: tidyup snd_soc_pcm_component_sync_stop() 2020-02-28 17:06:09 +00:00
soc-compress.c ASoC: Return error if the function does not support multi-cpu 2020-02-26 17:35:04 +00:00
soc-core.c ASoC: soc-core: Merge CPU/Codec for soc_dai_pcm_new() 2020-03-20 20:45:35 +00:00
soc-dai.c ASoC: soc-dai: fix DAI startup/shutdown sequence 2020-03-30 18:22:37 +01:00
soc-dapm.c ASoC: soc-dapm: Merge for_each_rtd_cpu/codec_dais() 2020-03-20 20:45:34 +00:00
soc-devres.c
soc-generic-dmaengine-pcm.c ASoC: Return error if the function does not support multi-cpu 2020-02-26 17:35:04 +00:00
soc-io.c
soc-jack.c ASoC: Jack: Fix NULL pointer dereference in snd_soc_jack_report 2019-11-12 17:12:56 +00:00
soc-ops.c ASoC: fix regwmask 2020-03-30 18:22:36 +01:00
soc-pcm.c ASoC: soc-pcm: Merge for_each_rtd_cpu/codec_dais() 2020-03-20 20:45:35 +00:00
soc-topology.c Merge branch 'for-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-5.7 2020-03-13 18:52:23 +00:00
soc-utils.c ASoC: utils: Drop superfluous ioctl PCM ops 2019-12-11 16:00:48 +00:00