A simple drm framebuffer tool to test drm devices. It takes data from stdin and will put it to the display.

The behavior of this tool should be similar to what was possible with:

dd if=/dev/urandom of=/dev/fb0

The following would be the equivalent:

dd if=/dev/urandom | drm-framebuffer -d /dev/dri/card0 -c HDMI-A-1

Additionally you can request information about the display configuration with the following two commands:

# Available connectors, crtcs and encoders
drm-framebuffer -d /dev/dri/card0 -l
connectors:
Number: 95 Name: eDP-1 Encoder: 94 Crtc: 51
Number: 103 Name: DP-1 Encoder: 102 Crtc: 72
Number: 112 Name: HDMI-A-1 Encoder: 0
Number: 118 Name: DP-2 Encoder: 0
Number: 124 Name: HDMI-A-2 Encoder: 0
Framebuffers:
CRTCs: 51 72 93
encoders: 94 102 104 105 106 117 119 120 121

#Resolution
drm-framebuffer -d /dev/dri/card0 -c DP-1 -r
3840x2160

This tool requires libdrm to compile and work.

To compile the tool simply type "make" with a valid gcc set trough the environment variable CC. Also make sure the drm headers and libraries are available (LDFLAGS, CFLAGS).

Copy the executable drm-framebuffer to your target and execute it.