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ALSA: asihpi: Handle playback drained status better

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Use the card drained status reporting for playback,
but allow it to persist for a few timer cycles before
signalling XRUN, to allow card to recover by itself.

Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Eliot Blennerhassett 2011-04-05 20:55:43 +12:00 committed by Takashi Iwai
parent a6477134db
commit 0b7ce9e2bd
1 changed files with 10 additions and 2 deletions
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12
sound/pci/asihpi/asihpi.c
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@ -165,6 +165,7 @@ struct snd_card_asihpi_pcm {
unsigned int pcm_buf_host_rw_ofs; /* Host R/W pos */
unsigned int pcm_buf_dma_ofs; /* DMA R/W offset in buffer */
unsigned int pcm_buf_elapsed_dma_ofs; /* DMA R/W offset in buffer */
unsigned int drained_count;
struct snd_pcm_substream *substream;
u32 h_stream;
struct hpi_format format;
@ -592,6 +593,7 @@ static int snd_card_asihpi_trigger(struct snd_pcm_substream *substream,
if (substream->stream != s->stream)
continue;
ds->drained_count = 0;
if ((s->stream == SNDRV_PCM_STREAM_PLAYBACK) &&
(card->support_mmap)) {
/* How do I know how much valid data is present
@ -771,12 +773,18 @@ static void snd_card_asihpi_timer_function(unsigned long data)
(on_card_bytes < ds->pcm_buf_host_rw_ofs)) {
hpi_handle_error(hpi_stream_start(ds->h_stream));
snd_printdd("P%d start\n", s->number);
ds->drained_count = 0;
}
} else if (state == HPI_STATE_DRAINED) {
snd_printd(KERN_WARNING "P%d drained\n",
s->number);
/*snd_pcm_stop(s, SNDRV_PCM_STATE_XRUN);
continue; */
ds->drained_count++;
if (ds->drained_count > 2) {
snd_pcm_stop(s, SNDRV_PCM_STATE_XRUN);
continue;
}
} else {
ds->drained_count = 0;
}
} else
pcm_buf_dma_ofs = bytes_avail + ds->pcm_buf_host_rw_ofs;