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ASoC: davinci-mcasp: Fix rx format when more bclk is used on the bus

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When the bus is configured to have more BCLK then the data type demands we
need to use the rotation to move the data to correct place.

Reported-by: Misael Lopez Cruz <misael.lopez@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2014-11-10 12:32:19 +02:00 committed by Mark Brown
parent d75249f545
commit d742b92524
1 changed files with 11 additions and 2 deletions
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13
sound/soc/davinci/davinci-mcasp.c
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@ -490,8 +490,17 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
* both left and right channels), so it has to be divided by number of
* tdm-slots (for I2S - divided by 2).
*/
if (mcasp->bclk_lrclk_ratio)
word_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
if (mcasp->bclk_lrclk_ratio) {
u32 slot_length = mcasp->bclk_lrclk_ratio / mcasp->tdm_slots;
/*
* When we have more bclk then it is needed for the data, we
* need to use the rotation to move the received samples to have
* correct alignment.
*/
rx_rotate = (slot_length - word_length) / 4;
word_length = slot_length;
}
/* mapping of the XSSZ bit-field as described in the datasheet */
fmt = (word_length >> 1) - 1;