Commit 1dddab40 authored by Takashi Iwai's avatar Takashi Iwai

ALSA: hda - Don't reset stream at each prepare callback

Don't reset the stream at each prepare callback but do it only once
after the open.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 97b71c94
......@@ -859,13 +859,18 @@ static void azx_stream_start(struct azx *chip, struct azx_dev *azx_dev)
SD_CTL_DMA_START | SD_INT_MASK);
}
/* stop a stream */
static void azx_stream_stop(struct azx *chip, struct azx_dev *azx_dev)
/* stop DMA */
static void azx_stream_clear(struct azx *chip, struct azx_dev *azx_dev)
{
/* stop DMA */
azx_sd_writeb(azx_dev, SD_CTL, azx_sd_readb(azx_dev, SD_CTL) &
~(SD_CTL_DMA_START | SD_INT_MASK));
azx_sd_writeb(azx_dev, SD_STS, SD_INT_MASK); /* to be sure */
}
/* stop a stream */
static void azx_stream_stop(struct azx *chip, struct azx_dev *azx_dev)
{
azx_stream_clear(chip, azx_dev);
/* disable SIE */
azx_writeb(chip, INTCTL,
azx_readb(chip, INTCTL) & ~(1 << azx_dev->index));
......@@ -1126,18 +1131,14 @@ static int azx_setup_periods(struct azx *chip,
return -EINVAL;
}
/*
* set up the SD for streaming
*/
static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev)
/* reset stream */
static void azx_stream_reset(struct azx *chip, struct azx_dev *azx_dev)
{
unsigned char val;
int timeout;
/* make sure the run bit is zero for SD */
azx_sd_writeb(azx_dev, SD_CTL, azx_sd_readb(azx_dev, SD_CTL) &
~SD_CTL_DMA_START);
/* reset stream */
azx_stream_clear(chip, azx_dev);
azx_sd_writeb(azx_dev, SD_CTL, azx_sd_readb(azx_dev, SD_CTL) |
SD_CTL_STREAM_RESET);
udelay(3);
......@@ -1154,7 +1155,15 @@ static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev)
while (((val = azx_sd_readb(azx_dev, SD_CTL)) & SD_CTL_STREAM_RESET) &&
--timeout)
;
}
/*
* set up the SD for streaming
*/
static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev)
{
/* make sure the run bit is zero for SD */
azx_stream_clear(chip, azx_dev);
/* program the stream_tag */
azx_sd_writel(azx_dev, SD_CTL,
(azx_sd_readl(azx_dev, SD_CTL) & ~SD_CTL_STREAM_TAG_MASK)|
......@@ -1399,6 +1408,8 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
runtime->private_data = azx_dev;
snd_pcm_set_sync(substream);
mutex_unlock(&chip->open_mutex);
azx_stream_reset(chip, azx_dev);
return 0;
}
......
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