drm/i915/dp: Add from_crtc_state to copy color blobs

No functional changes here, just adds a from_crtc_state
as a prep for bigjoiner

v2:
* More prep with intel_atomic_state (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201113155656.17630-2-manasi.d.navare@intel.com

drivers/gpu/drm/i915/display/intel_atomic.c

@@ -269,14 +269,15 @@ void intel_crtc_free_hw_state(struct intel_crtc_state *crtc_state)
 	intel_crtc_put_color_blobs(crtc_state);
 }
 
-void intel_crtc_copy_color_blobs(struct intel_crtc_state *crtc_state)
+void intel_crtc_copy_color_blobs(struct intel_crtc_state *crtc_state,
+				 const struct intel_crtc_state *from_crtc_state)
 {
 	drm_property_replace_blob(&crtc_state->hw.degamma_lut,
-				  crtc_state->uapi.degamma_lut);
+				  from_crtc_state->uapi.degamma_lut);
 	drm_property_replace_blob(&crtc_state->hw.gamma_lut,
-				  crtc_state->uapi.gamma_lut);
+				  from_crtc_state->uapi.gamma_lut);
 	drm_property_replace_blob(&crtc_state->hw.ctm,
-				  crtc_state->uapi.ctm);
+				  from_crtc_state->uapi.ctm);
 }
 
 /**

drivers/gpu/drm/i915/display/intel_atomic.h

@@ -43,7 +43,8 @@ struct drm_crtc_state *intel_crtc_duplicate_state(struct drm_crtc *crtc);
 void intel_crtc_destroy_state(struct drm_crtc *crtc,
 			       struct drm_crtc_state *state);
 void intel_crtc_free_hw_state(struct intel_crtc_state *crtc_state);
-void intel_crtc_copy_color_blobs(struct intel_crtc_state *crtc_state);
+void intel_crtc_copy_color_blobs(struct intel_crtc_state *crtc_state,
+				 const struct intel_crtc_state *from_crtc_state);
 struct drm_atomic_state *intel_atomic_state_alloc(struct drm_device *dev);
 void intel_atomic_state_free(struct drm_atomic_state *state);
 void intel_atomic_state_clear(struct drm_atomic_state *state);

drivers/gpu/drm/i915/display/intel_display.c

@@ -13421,7 +13421,9 @@ static void
 intel_crtc_copy_uapi_to_hw_state_nomodeset(struct intel_atomic_state *state,
 					   struct intel_crtc_state *crtc_state)
 {
-	intel_crtc_copy_color_blobs(crtc_state);
+	const struct intel_crtc_state *from_crtc_state = crtc_state;
+
+	intel_crtc_copy_color_blobs(crtc_state, from_crtc_state);
 }
 
 static void