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authorWu Fengguang <fengguang.wu@intel.com>2009-02-11 10:22:28 +0300
committerTakashi Iwai <tiwai@suse.de>2009-02-11 11:08:47 +0300
commita1667e4eea0a7085815d1532d7630bb4611271d0 (patch)
tree3e953fee709e0c41bf6fa1496cab025700e865d0 /sound
parent44a678d04babaa751c0ee98e006ede9576fa9e00 (diff)
downloadlinux-a1667e4eea0a7085815d1532d7630bb4611271d0.tar.xz
ALSA: hda - allow multi-channel HDMI audio playback when ELD is not present
The YAMAHA AV-X1800 requires audio infoframe to include speaker-channel mapping to play >2 channel HDMI audio. In theory that mapping should be derived from its speaker configurations contained in its ELD. However we currently cannot get ELD in console before the KMS functionalities are ready. This is a more or less general issue at least in the near future. As a workaround, we propose to allow playback of mult-channel audio when ELD is not available. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_intelhdmi.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index 3564f4e4b74c..a8643509e2af 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -419,14 +419,18 @@ static int hdmi_setup_channel_allocation(struct hda_codec *codec,
/*
* CA defaults to 0 for basic stereo audio
*/
- if (!eld->eld_ver)
- return 0;
- if (!eld->spk_alloc)
- return 0;
if (channels <= 2)
return 0;
/*
+ * HDMI sink's ELD info cannot always be retrieved for now, e.g.
+ * in console or for audio devices. Assume the highest speakers
+ * configuration, to _not_ prohibit multi-channel audio playback.
+ */
+ if (!eld->spk_alloc)
+ eld->spk_alloc = 0xffff;
+
+ /*
* expand ELD's speaker allocation mask
*
* ELD tells the speaker mask in a compact(paired) form,