[media] tw686x: audio: Prevent hw param changes while busy

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Audio hw params are shared across all DMA channels,
so if the user changes any of these while any DMA channel is
enabled, it will impact the enabled channels, potentially causing
serious instability issues.

This commit avoids such situation, by preventing any hw param
change (on any DMA channel) if any other DMA audio channel is capturing.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

...

This commit is contained in:

Ezequiel Garcia 2016-06-04 20:47:20 -03:00 • committed by Mauro Carvalho Chehab

parent 447d7c3291

commit 6deab6fec8

2 changed files with 17 additions and 4 deletions

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20

drivers/media/pci/tw686x/tw686x-audio.c

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1

drivers/media/pci/tw686x/tw686x.h

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