ASoC: rsnd: add nolock_start/stop callback

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Current Renesas Sound driver requests DMA channel when .probe timing,
and release it when .remove timing. And use DMA on .start/.stop
But, Audio DMAC power ON was handled when request timing (= .probe),
and power OFF was when release timing (= .remove).
This means Audio DMAC power is always ON during driver was enabled.
To fixup this issue, it should request/release DMA channel on each
playback/recorde timing.
But, DMA channel request/release function uses mutex lock inside.
This means it will breaks current spinlock's interrupt protect.
To solve this issue, DMA channel request/release function needs to
be called from non-spinlock area. This patch adds its callback.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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This commit is contained in:

Kuninori Morimoto 2016-10-25 00:37:35 +00:00 • committed by Mark Brown

parent 161ba1f1a5

commit 10a9cca132

2 changed files with 40 additions and 1 deletions

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26

sound/soc/sh/rcar/core.c

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15

sound/soc/sh/rcar/rsnd.h

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