[ALSA] hda-intel - Add sync support
Addded the support of sync streams to hda-intel driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 557f269..bc3867e 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -221,6 +221,9 @@
/* SD_CTL bits */
#define SD_CTL_STREAM_RESET 0x01 /* stream reset bit */
#define SD_CTL_DMA_START 0x02 /* stream DMA start bit */
+#define SD_CTL_STRIPE (3 << 16) /* stripe control */
+#define SD_CTL_TRAFFIC_PRIO (1 << 18) /* traffic priority */
+#define SD_CTL_DIR (1 << 19) /* bi-directional stream */
#define SD_CTL_STREAM_TAG_MASK (0xf << 20)
#define SD_CTL_STREAM_TAG_SHIFT 20
@@ -1180,7 +1183,8 @@
SNDRV_PCM_INFO_MMAP_VALID |
/* No full-resume yet implemented */
/* SNDRV_PCM_INFO_RESUME |*/
- SNDRV_PCM_INFO_PAUSE),
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_SYNC_START),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
@@ -1242,6 +1246,7 @@
spin_unlock_irqrestore(&chip->reg_lock, flags);
runtime->private_data = azx_dev;
+ snd_pcm_set_sync(substream);
mutex_unlock(&chip->open_mutex);
return 0;
}
@@ -1326,37 +1331,94 @@
static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
- struct azx_dev *azx_dev = get_azx_dev(substream);
struct azx *chip = apcm->chip;
- int err = 0;
+ struct azx_dev *azx_dev;
+ struct snd_pcm_substream *s;
+ int start, nsync = 0, sbits = 0;
+ int nwait, timeout;
- spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_START:
- azx_stream_start(chip, azx_dev);
- azx_dev->running = 1;
+ start = 1;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
- azx_stream_stop(chip, azx_dev);
- azx_dev->running = 0;
+ start = 0;
break;
default:
- err = -EINVAL;
+ return -EINVAL;
+ }
+
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->pcm->card != substream->pcm->card)
+ continue;
+ azx_dev = get_azx_dev(s);
+ sbits |= 1 << azx_dev->index;
+ nsync++;
+ snd_pcm_trigger_done(s, substream);
+ }
+
+ spin_lock(&chip->reg_lock);
+ if (nsync > 1) {
+ /* first, set SYNC bits of corresponding streams */
+ azx_writel(chip, SYNC, azx_readl(chip, SYNC) | sbits);
+ }
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->pcm->card != substream->pcm->card)
+ continue;
+ azx_dev = get_azx_dev(s);
+ if (start)
+ azx_stream_start(chip, azx_dev);
+ else
+ azx_stream_stop(chip, azx_dev);
+ azx_dev->running = start;
}
spin_unlock(&chip->reg_lock);
- if (cmd == SNDRV_PCM_TRIGGER_PAUSE_PUSH ||
- cmd == SNDRV_PCM_TRIGGER_SUSPEND ||
- cmd == SNDRV_PCM_TRIGGER_STOP) {
- int timeout = 5000;
- while ((azx_sd_readb(azx_dev, SD_CTL) & SD_CTL_DMA_START) &&
- --timeout)
- ;
+ if (start) {
+ if (nsync == 1)
+ return 0;
+ /* wait until all FIFOs get ready */
+ for (timeout = 5000; timeout; timeout--) {
+ nwait = 0;
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->pcm->card != substream->pcm->card)
+ continue;
+ azx_dev = get_azx_dev(s);
+ if (!(azx_sd_readb(azx_dev, SD_STS) &
+ SD_STS_FIFO_READY))
+ nwait++;
+ }
+ if (!nwait)
+ break;
+ cpu_relax();
+ }
+ } else {
+ /* wait until all RUN bits are cleared */
+ for (timeout = 5000; timeout; timeout--) {
+ nwait = 0;
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->pcm->card != substream->pcm->card)
+ continue;
+ azx_dev = get_azx_dev(s);
+ if (azx_sd_readb(azx_dev, SD_CTL) &
+ SD_CTL_DMA_START)
+ nwait++;
+ }
+ if (!nwait)
+ break;
+ cpu_relax();
+ }
}
- return err;
+ if (nsync > 1) {
+ spin_lock(&chip->reg_lock);
+ /* reset SYNC bits */
+ azx_writel(chip, SYNC, azx_readl(chip, SYNC) & ~sbits);
+ spin_unlock(&chip->reg_lock);
+ }
+ return 0;
}
static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream)