Today, DisplayPort multi-stream transport (DP-MST) audio is not supported on codec drivers which don't use the audio component (acomp) binding.
The commit ade49db337a9 (ALSA: hda/hdmi - Allow audio component for AMD/ATI and Nvidia HDMI) added the DRM audio component binding for the NVIDIA codec drivers, but the traditional HD-audio unsolicited event code path is still in use by the proprietary NVIDIA graphics driver.
This patch set adds DP-MST audio support for non-acomp codec drivers which use the traditional HD-audio unsolicited event code path. This patch set adds DP-MST support for NVIDIA codecs.
The patch set has been tested for HDMI/DP-SST/DP-MST(4 dp-mst audio streams) configurations on NVIDIA Kepler and Maxwell GPUs, using both the nouveau driver and the proprietary NVIDIA graphics driver.
Nikhil Mahale (5): ALSA: hda - Rename snd_hda_pin_sense to snd_hda_jack_pin_sense ALSA: hda - Add DP-MST jack support ALSA: hda - Add DP-MST conn list support ALSA: hda - Add DP-MST support for non-acomp codecs ALSA: hda - Add DP-MST support for NVIDIA codecs
sound/pci/hda/hda_codec.c | 5 +- sound/pci/hda/hda_jack.c | 143 +++++++++++++++++-------- sound/pci/hda/hda_jack.h | 107 +++++++++++++++++-- sound/pci/hda/patch_hdmi.c | 256 +++++++++++++++++++++++++++++++-------------- 4 files changed, 378 insertions(+), 133 deletions(-)