[PATCH 2/7] drm: make gamma_set optional

Signed-off-by: Sascha Hauer s.hauer@pengutronix.de --- drivers/gpu/drm/drm_crtc.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index b14496e..75f66a5 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -3108,6 +3108,11 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev, goto out; }

+ if (!crtc->funcs->gamma_set) { + ret = -ENOSYS; + goto out; + } + crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);

out: