DRM DP AUX Interface
configname: CONFIG_DRM_DP_AUX_CHARDEV
Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>DRM DP AUX Interface
In linux kernel since version 3.10 (release Date: 2013-06-30)
Choose this option to enable a /dev/drm_dp_auxN node that allows to
read and write values to arbitrary DPCD registers on the DP aux
channel.
read and write values to arbitrary DPCD registers on the DP aux
channel.