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ASoC: davinci-mcasp: Revise the FIFO threshold calculation

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The FIFO threshold for McASP should be <=[tx/rx]numevt so the initial value
for the refining should meet this requirement as well.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2015-09-14 16:06:48 +03:00 committed by Mark Brown
parent 6ff33f3902
commit 723831927e
1 changed files with 3 additions and 4 deletions
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7
sound/soc/davinci/davinci-mcasp.c
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@ -663,7 +663,7 @@ static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
u8 rx_ser = 0;
u8 slots = mcasp->tdm_slots;
u8 max_active_serializers = (channels + slots - 1) / slots;
int active_serializers, numevt, n;
int active_serializers, numevt;
u32 reg;
/* Default configuration */
if (mcasp->version < MCASP_VERSION_3)
@ -745,9 +745,8 @@ static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
* The number of words for numevt need to be in steps of active
* serializers.
*/
n = numevt % active_serializers;
if (n)
numevt += (active_serializers - n);
numevt = (numevt / active_serializers) * active_serializers;
while (period_words % numevt && numevt > 0)
numevt -= active_serializers;
if (numevt <= 0)