ASoC: amd: renoir: restore two more registers during resume
authorHui Wang <hui.wang@canonical.com>
Thu, 30 Jul 2020 12:31:38 +0000 (20:31 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 26 Aug 2020 09:49:00 +0000 (11:49 +0200)
commite0d5793a7aa62fbda5a15e0b2fdd14729ec18d0e
treef97311db2a1dac97f1eb3e8c59029b632f8157f9
parent5b21a116b13658392124777dc1b08f3b1ef3f89e
ASoC: amd: renoir: restore two more registers during resume

commit ccff7bd468d5e0595176656a051ef67c01f01968 upstream.

Recently we found an issue about the suspend and resume. If dmic is
recording the sound, and we run suspend and resume, after the resume,
the dmic can't work well anymore. we need to close the app and reopen
the app, then the dmic could record the sound again.

For example, we run "arecord -D hw:CARD=acp,DEV=0 -f S32_LE -c 2
-r 48000 test.wav", then suspend and resume, after the system resume
back, we speak to the dmic. then stop the arecord, use aplay to play
the test.wav, we could hear the sound recorded after resume is weird,
it is not what we speak to the dmic.

I found two registers are set in the dai_hw_params(), if the two
registers are set during the resume, this issue could be fixed.
Move the code of the dai_hw_params() into the pdm_dai_trigger(), then
these two registers will be set during resume since pdm_dai_trigger()
will be called during resume. And delete the empty function
dai_hw_params().

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200730123138.5659-1-hui.wang@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sound/soc/amd/renoir/acp3x-pdm-dma.c