Hi,
For some reason these patches did not made it to mainline kernel. V2 was sent on 28.04.2014: http://mailman.alsa-project.org/pipermail/alsa-devel/2014-March/074871.html and got applied the same day: http://mailman.alsa-project.org/pipermail/alsa-devel/2014-March/074878.html
I just noticed that they are missing.
Changes since v2: - rebased on next
Changes since v1: - Correction for the stop sequence is added - start code cleanup patch added
The startup sequence for TX and RX was not correct, not following the programming sequence from the TRM. This could cause initial channel swap when starting TX. When stopping the stream the AFIFO should be stopped as the last step to avoid unpredictable behavior.
The change has been tested on AM335x and AM437x but it should be valid for all devices.
Regards, Peter --- Peter Ujfalusi (4): ASoC: davinci-mcasp: Correct TX start sequence ASoC: davinci-mcasp: Correct RX start sequence ASoC: davinci-mcasp: When stopping TX/RX stop the AFIFO as the last step ASoC: davinci-mcasp: Move the AFIFO related code under start_tx/rx functions
sound/soc/davinci/davinci-mcasp.c | 95 ++++++++++++++++++--------------------- sound/soc/davinci/davinci-mcasp.h | 6 +++ 2 files changed, 49 insertions(+), 52 deletions(-)