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ALSA: hda - Suppress the odd number of channels for HDMI

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It looks like that HDMI codecs don't support the odd number of channels
although HD-audio spec doesn't have the restriction.  Add the
hw_constraint to limit to only the even number of channels.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2011-01-14 09:42:27 +01:00
parent 5870112021
commit ad09fc9d21
1 changed files with 3 additions and 0 deletions
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3
sound/pci/hda/patch_hdmi.c
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@ -1238,6 +1238,9 @@ static int simple_playback_pcm_open(struct hda_pcm_stream *hinfo,
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
hw_constraints_channels);
} else {
snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS, 2);
}
return snd_hda_multi_out_dig_open(codec, &spec->multiout);