[PATCH 2/3] drm/fb-helper: Make load_lut and gamma_set/gamma_get hooks optional

From: Ville Syrj?l? Check whether the crtc provides the load_lut callback before calling it. This allows the driver to provide the hook only for those CRTCs that actually have the hardware support for it. Also check whether the driver provided the fb_helper

[PATCH 2/3] drm/fb-helper: Make load_lut and gamma_set/gamma_get hooks optional

From: Ville Syrjälä ville.syrj...@linux.intel.com Check whether the crtc provides the load_lut callback before calling it. This allows the driver to provide the hook only for those CRTCs that actually have the hardware support for it. Also check whether the driver provided the fb_helper