ASoC: fsl_sai: Set SYNC bit of TCR2 to Asynchronous Mode

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commit 855675f6e6 upstream.

There is one design rule according to SAI's reference manual:
If the transmitter bit clock and frame sync are to be used by both transmitter
and receiver, the transmitter must be configured for asynchronous operation
and the receiver for synchronous operation.

And SYNC of TCR2 is a 2-width control bit:
00 Asynchronous mode.
01 Synchronous with receiver.
10 Synchronous with another SAI transmitter.
11 Synchronous with another SAI receiver.

So the driver should have set SYNC bit of TCR2 to 0x0, and meanwhile set SYNC
bit of RCR2 to 0x1 (Synchronous with transmitter).

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Nicolin Chen 2014-08-04 15:07:25 +08:00 • committed by Ben Hutchings

parent 7ee8387b6f

commit 26b7e0e678

1 changed files with 1 additions and 2 deletions

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sound/soc/fsl/fsl_sai.c

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