drm/amd/display: Refactor dm_get_plane_scale helper

Cleanup, no functional change intended.
Signed-off-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -10269,6 +10269,17 @@ static void dm_get_oriented_plane_size(struct drm_plane_state *plane_state,
 	}
 }
 
+static void
+dm_get_plane_scale(struct drm_plane_state *plane_state,
+		   int *out_plane_scale_w, int *out_plane_scale_h)
+{
+	int plane_src_w, plane_src_h;
+
+	dm_get_oriented_plane_size(plane_state, &plane_src_w, &plane_src_h);
+	*out_plane_scale_w = plane_state->crtc_w * 1000 / plane_src_w;
+	*out_plane_scale_h = plane_state->crtc_h * 1000 / plane_src_h;
+}
+
 static int dm_check_crtc_cursor(struct drm_atomic_state *state,
 				struct drm_crtc *crtc,
 				struct drm_crtc_state *new_crtc_state)
@@ -10277,8 +10288,6 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state,
 	struct drm_plane_state *new_cursor_state, *new_underlying_state;
 	int i;
 	int cursor_scale_w, cursor_scale_h, underlying_scale_w, underlying_scale_h;
-	int cursor_src_w, cursor_src_h;
-	int underlying_src_w, underlying_src_h;
 
 	/* On DCE and DCN there is no dedicated hardware cursor plane. We get a
 	 * cursor per pipe but it's going to inherit the scaling and
@@ -10293,9 +10302,7 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state,
 	if (!new_cursor_state->fb)
 		return 0;
 
-	dm_get_oriented_plane_size(new_cursor_state, &cursor_src_w, &cursor_src_h);
-	cursor_scale_w = new_cursor_state->crtc_w * 1000 / cursor_src_w;
-	cursor_scale_h = new_cursor_state->crtc_h * 1000 / cursor_src_h;
+	dm_get_plane_scale(new_cursor_state, &cursor_scale_w, &cursor_scale_h);
 
 	/* Need to check all enabled planes, even if this commit doesn't change
 	 * their state
@@ -10313,10 +10320,8 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state,
 		if (!new_underlying_state->fb)
 			continue;
 
-		dm_get_oriented_plane_size(new_underlying_state,
-					   &underlying_src_w, &underlying_src_h);
-		underlying_scale_w = new_underlying_state->crtc_w * 1000 / underlying_src_w;
-		underlying_scale_h = new_underlying_state->crtc_h * 1000 / underlying_src_h;
+		dm_get_plane_scale(new_underlying_state,
+				   &underlying_scale_w, &underlying_scale_h);
 
 		if (cursor_scale_w != underlying_scale_w ||
 		    cursor_scale_h != underlying_scale_h) {