drm: Make the CRTC gamma_set operation optional

Drivers for hardware without gamma support should not be forced to
implement a no-op gamma set operation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Rob Clark <rob.clark@linaro.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/drivers/staging/omapdrm/omap_crtc.c b/drivers/staging/omapdrm/omap_crtc.c
index 490a7f15604b..8b864afb40b6 100644
--- a/drivers/staging/omapdrm/omap_crtc.c
+++ b/drivers/staging/omapdrm/omap_crtc.c
@@ -36,12 +36,6 @@ struct omap_crtc {
         struct drm_framebuffer *old_fb;
 };
 
-static void omap_crtc_gamma_set(struct drm_crtc *crtc,
-                u16 *red, u16 *green, u16 *blue, uint32_t start, uint32_t size)
-{
-        /* not supported.. at least not yet */
-}
-
 static void omap_crtc_destroy(struct drm_crtc *crtc)
 {
         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
@@ -198,7 +192,6 @@ static int omap_crtc_page_flip_locked(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_funcs omap_crtc_funcs = {
-        .gamma_set = omap_crtc_gamma_set,
         .set_config = drm_crtc_helper_set_config,
         .destroy = omap_crtc_destroy,
         .page_flip = omap_crtc_page_flip_locked,