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authorManuel Lauss <manuel.lauss@googlemail.com>2009-09-08 19:45:17 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-09-08 19:21:27 +0100
commitcdc65fbe18aef15e92d2ebb410a189fbf956fb06 (patch)
treed121aea788bf52467683a9072ff3d15b89bd5c08 /arch/arm
parent87831cb660954356d68cebdb1406f3be09e784e9 (diff)
ASoC: au1x: PSC-AC97 bugfixes
This patch fixes the following bugs: - only reprogram bitdepth if it has changed since last call to hw_params. - add locking inside ac97_read/write functions: When reprogramming sample depth, the ac97 unit has to be disabled, which should not be done in the middle of codec register accesses. - retry timed-out codec register accesses. - wait for status bits to set/clear when starting/stopping various functional blocks; very important after reenabling AC97 unit else sound may be distorted (e.g. high-pitch noise in 1kHz sine wave). - clear fifos before/after starting/stopping RX/TX. - longer timeouts waiting for PSC/AC97 ready after cold reset with certain codecs this can take ridiculous amounts of time. Run-tested on various Au1200 platforms with various codecs. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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