From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 14 Jan 2011 08:42:27 +0000 (+0100)
Subject: ALSA: hda - Suppress the odd number of channels for HDMI
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ad09fc9d2156f3d37537b34418a6b79309013d33;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

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>
---

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);