diff options
Diffstat (limited to 'backend')
| -rw-r--r-- | backend/drm/atomic.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/backend/drm/atomic.c b/backend/drm/atomic.c index 166d60a0..526b2731 100644 --- a/backend/drm/atomic.c +++ b/backend/drm/atomic.c @@ -201,6 +201,12 @@ static bool atomic_crtc_set_gamma(struct wlr_drm_backend *drm, uint32_t size) { struct drm_color_lut gamma[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) { + return legacy_iface.crtc_set_gamma(drm, crtc, r, g, b, size); + } + for (uint32_t i = 0; i < size; i++) { gamma[i].red = r[i]; gamma[i].green = g[i]; @@ -227,6 +233,10 @@ static uint32_t atomic_crtc_get_gamma_size(struct wlr_drm_backend *drm, struct wlr_drm_crtc *crtc) { uint64_t gamma_lut_size; + if (crtc->props.gamma_lut_size == 0) { + return legacy_iface.crtc_get_gamma_size(drm, crtc); + } + if (!wlr_drm_get_prop(drm->fd, crtc->id, crtc->props.gamma_lut_size, &gamma_lut_size)) { wlr_log(L_ERROR, "Unable to get gamma lut size"); |