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ALSA - au88x0 - Add buffer bytes constraints

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This allow application such as gstreamer and wine which use
snd_pcm_hw_params_set_buffer_time_near() won't fail any more
since sound chips require special containt power 2 period bytes

Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Raymond Yau 2011-04-25 12:05:45 +08:00 committed by Takashi Iwai
parent 6a9a6f233b
commit 54a96dadaa
1 changed files with 5 additions and 2 deletions
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7
sound/pci/au88x0/au88x0_pcm.c
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@ -44,10 +44,10 @@ static struct snd_pcm_hardware snd_vortex_playback_hw_adb = {
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 0x10000,
.period_bytes_min = 0x1,
.period_bytes_min = 0x20,
.period_bytes_max = 0x1000,
.periods_min = 2,
.periods_max = 32,
.periods_max = 1024,
};
#ifndef CHIP_AU8820
@ -140,6 +140,9 @@ static int snd_vortex_pcm_open(struct snd_pcm_substream *substream)
SNDRV_PCM_HW_PARAM_PERIOD_BYTES)) < 0)
return err;
snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 64);
if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
#ifndef CHIP_AU8820
if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_A3D) {