[alsa-devel] asoc register read/write calls
Mark,
In the asoc framework, do the codec register read-write calls need to be atomic? Will it work in non-atomic context?
~Vinod
On Wed, Nov 24, 2010 at 06:11:51PM +0530, Koul, Vinod wrote:
Mark,
Please remember to always CC maintainers on posts to the mailing lists. I've reminded you of this on quite a few previous occasions.
In the asoc framework, do the codec register read-write calls need to be atomic? Will it work in non-atomic context?
There is no requirement for atomic context, in fact vanishingly few CODECs can be accessed in atomic context as pretty much all of them are controlled using I2C or SPI.
On Wed, Nov 24, 2010 at 6:24PM +0530, Mark Brown wrote:
On Wed, Nov 24, 2010 at 06:11:51PM +0530, Koul, Vinod wrote:
Mark,
Please remember to always CC maintainers on posts to the mailing lists. I've reminded you of this on quite a few previous occasions.
I apologize for this, will be double careful in future...
In the asoc framework, do the codec register read-write calls need to be
atomic?
Will it work in non-atomic context?
There is no requirement for atomic context, in fact vanishingly few CODECs can be accessed in atomic context as pretty much all of them are controlled using I2C or SPI.
I don't have SPI or I2C to read/write my codec :-( I need to use read/write apis defined in <asm/intel_scu_ipc.h> int intel_scu_ipc_ioread8(u16 addr, u8 *data); int intel_scu_ipc_iowrite8(u16 addr, u8 data); and these can block a little while they get/set the data.
But since that is not an issue, makes my life easy :-)
Thanks ~Vinod
participants (2)
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Koul, Vinod -
Mark Brown