From ad09fc9d2156f3d37537b34418a6b79309013d33 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 14 Jan 2011 09:42:27 +0100 Subject: [PATCH] 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 --- sound/pci/hda/patch_hdmi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index f29b97b5de8f..2d288793ceb3 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -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); -- 2.34.1