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ASoC: Davinci: McASP: Flush the FIFO before enabling

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FIFO should be flushed before it is enabled for the first time.
This fixes the I/O errors reported by the ASoC core on a fresh boot

Signed-off-by: Vaibhav Bedia <vaibhav.bedia@ti.com>
Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Vaibhav Bedia 2012-08-08 20:40:31 +05:30 committed by Mark Brown
parent 0865a75d41
commit 0d62427572
1 changed files with 8 additions and 2 deletions
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10
sound/soc/davinci/davinci-mcasp.c
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@ -380,14 +380,20 @@ static void mcasp_start_tx(struct davinci_audio_dev *dev)
static void davinci_mcasp_start(struct davinci_audio_dev *dev, int stream)
{
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (dev->txnumevt) /* enable FIFO */
if (dev->txnumevt) { /* enable FIFO */
mcasp_clr_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
FIFO_ENABLE);
mcasp_set_bits(dev->base + DAVINCI_MCASP_WFIFOCTL,
FIFO_ENABLE);
}
mcasp_start_tx(dev);
} else {
if (dev->rxnumevt) /* enable FIFO */
if (dev->rxnumevt) { /* enable FIFO */
mcasp_clr_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
FIFO_ENABLE);
mcasp_set_bits(dev->base + DAVINCI_MCASP_RFIFOCTL,
FIFO_ENABLE);
}
mcasp_start_rx(dev);
}
}