[PATCH] ALSA: hda: Disable odd numbered channels on HDMI controllers.

[Nitin Daga <ndaga@nvidia.com>]

Added code in hda_intel.c to disable odd numbered channels
not supported by HDMI controllers.

Signed-off-by: Nitin Daga <ndaga@nvidia.com>
Acked-By: Stephen Warren <swarren@nvidia.com>
---
 pci/hda/hda_intel.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/pci/hda/hda_intel.c b/pci/hda/hda_intel.c
index a78ea34..293c685 100644
--- a/pci/hda/hda_intel.c
+++ b/pci/hda/hda_intel.c
@@ -1539,6 +1539,16 @@ struct azx_pcm {
 	struct hda_pcm_stream *hinfo[2];
 };
 
+static unsigned int channels_2_4_6_8[] = {
+	2, 4, 6, 8
+};
+
+static struct snd_pcm_hw_constraint_list hw_constraints_2_4_6_8_channels = {
+	.count = ARRAY_SIZE(channels_2_4_6_8),
+	.list = channels_2_4_6_8,
+	.mask = 0,
+};
+
 static int azx_pcm_open(struct snd_pcm_substream *substream)
 {
 	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
@@ -1566,6 +1576,9 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
 				   128);
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
 				   128);
+	snd_pcm_hw_constraint_list(runtime, 0,
+				   SNDRV_PCM_HW_PARAM_CHANNELS,
+				   &hw_constraints_2_4_6_8_channels);
 	snd_hda_power_up(apcm->codec);
 	err = hinfo->ops.open(hinfo, apcm->codec, substream);
 	if (err < 0) {
-- 
1.7.0.4


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