Packages with the drm use flag

app-misc / ddcutil : Program for querying and changing monitor settings

dev-libs / efl : Enlightenment Foundation Libraries all-in-one package

Enable DRM engine

dev-libs / weston : Wayland reference compositor

Enable drm compositor support

media-plugins / gst-plugins-vaapi : Hardware accelerated video decoding through VA-API plugin for GStreamer

Enable DRM renderer

media-video / libva-utils : Collection of utilities and tests for VA-API

media-video / mpv : Media player based on MPlayer and mplayer2

Enable Kernel Mode Setting / Direct Rendering Manager based video output

net-misc / tigervnc : Remote desktop viewer display system

Build with DRM support

sys-apps / kmscon : KMS/DRM based virtual Console Emulator

x11-libs / libva : Video Acceleration (VA) API for Linux

Enables VA/DRM API support.

x11-libs / libva-compat : Video Acceleration (VA) API for Linux

x11-libs / libva-intel-driver : HW video decode support for Intel integrated graphics

Enables VA/DRM API support.

x11-misc / compton : A compositor for X, and a fork of xcompmgr-dana

Enable VSync with DRM_IOCTL_WAIT_VBLANK