[alsa-devel] [RFC PATCH 3/3] ALSA: hda - Haswell codec exposes device list/select info on pins

mengdong.lin at intel.com mengdong.lin at intel.com
Fri Aug 23 06:56:57 CEST 2013

From: Mengdong Lin <mengdong.lin at intel.com>

This patch is only to allow codec proc file to expose devices list/select info
for Haswell codec pins.

Since Haswell Gfx driver cannot support DP1.2 MST now, so all pins' device list
is empty, meaning no pin is multi-streaming capaple.

Signed-off-by: Mengdong Lin <mengdong.lin at intel.com>

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 030ca86..87ca984 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1989,8 +1989,10 @@ static int patch_generic_hdmi(struct hda_codec *codec)
 		return -EINVAL;
 	codec->patch_ops = generic_hdmi_patch_ops;
-	if (codec->vendor_id == 0x80862807)
+	if (codec->vendor_id == 0x80862807) {
 		codec->patch_ops.set_power_state = haswell_set_power_state;
+		codec->dp_mst = true;
+	}

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