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Fallback gamma on legacy if properties don't exist

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This commit is contained in:
Vincent Vanlaer 2018-02-10 10:24:49 +01:00
parent dd69d7b764
commit 7cb828ac70
1 changed files with 10 additions and 0 deletions
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10
backend/drm/atomic.c
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@ -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");