diff --git a/[refs] b/[refs]
index ae68629ecada..16d4cae4ac12 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 639cef0eb6df05d5516520aa89b0c9fe62ee2d3b
+refs/heads/master: 4fe2ca14678174d9df254ae3ba2b79bacc19e2ee
diff --git a/trunk/sound/pci/hda/patch_hdmi.c b/trunk/sound/pci/hda/patch_hdmi.c
index 5980552f5970..2d5b83fa8d24 100644
--- a/trunk/sound/pci/hda/patch_hdmi.c
+++ b/trunk/sound/pci/hda/patch_hdmi.c
@@ -850,6 +850,9 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
 	runtime->hw.channels_max = hinfo->channels_max;
 	runtime->hw.formats = hinfo->formats;
 	runtime->hw.rates = hinfo->rates;
+
+	snd_pcm_hw_constraint_step(substream->runtime, 0,
+				   SNDRV_PCM_HW_PARAM_CHANNELS, 2);
 	return 0;
 }