drm/amd/display: fix gamma setting

Adding gamma changed check as condition for affected plane.
We ignored adding plane as affected if modeset was not required.
But for color management change we still need it.
Signed-off-by: NRoman Li <Roman.Li@amd.com>
Reviewed-by: NTony Cheng <Tony.Cheng@amd.com>
Acked-by: NHarry Wentland <harry.wentland@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -4717,7 +4717,8 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 		}
 	} else {
 		for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
-			if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
+			if (!drm_atomic_crtc_needs_modeset(new_crtc_state) &&
+					!new_crtc_state->color_mgmt_changed)
 				continue;
 
 			if (!new_crtc_state->enable)