backends/drm: don't do direct scanout when HDR brightness isn't 1
Otherwise the brightness multiplier doesn't get applied
(cherry picked from commit 178d4909)
Co-authored-by: Xaver Hugl xaver.hugl@gmail.com
Otherwise the brightness multiplier doesn't get applied
(cherry picked from commit 178d4909)
Co-authored-by: Xaver Hugl xaver.hugl@gmail.com