Use legacy modesetting for gamma control
It doesn't look like there's any motion on a fix from the AMDGPU side,
and using the legacy interface for this isn't so bad.
@@ -201,7 +201,9 @@ static bool atomic_crtc_set_gamma(struct wlr_drm_backend *drm,
uint32_t size) {
// Fallback to legacy gamma interface when gamma properties are not available
// (can happen on older intel gpu's that support gamma but not degamma)
- if (crtc->props.gamma_lut == 0) {
+ // TEMP: This is broken on AMDGPU. Always fallback to legacy until they get
+ // it fixed. Ref https://bugs.freedesktop.org/show_bug.cgi?id=107459
+ if (crtc->props.gamma_lut == 0 || true) {
return legacy_iface.crtc_set_gamma(drm, crtc, r, g, b, size);
}
