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



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>

parent 58701120

sound/pci/hda/patch_hdmi.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);