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authorMengdong Lin <mengdong.lin@intel.com>2013-08-27 01:35:21 (GMT)
committerTakashi Iwai <tiwai@suse.de>2013-08-27 10:15:09 (GMT)
commitf1aa06847506d5b88f5eb41fae6a24a7128097e7 (patch)
treecac7c3bd3fa0cc6a945f2393ab678b263f65b99c /Kbuild
parent68538bf2bce557c3b5fe8c59b034d45352500db1 (diff)
downloadlinux-fsl-qoriq-f1aa06847506d5b88f5eb41fae6a24a7128097e7.tar.xz
ALSA: hda - add flags and routines to get devices selection info for DP1.2 MST
This patch adds flags and routines to get device list & selection info on a pin. To support Display Port 1.2 multi-stream transport (MST) over single DP port, a pin can support multiple devices. Please refer to HD-A spec Document Change Notificaton HDA040-A. A display audio codec can set flag "dp_mst" in its patch, indicating its pins can support MST. But at runtime, a pin may not be multi-streaming capable and report the device list is empty, depending on Gfx driver configuration. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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