drm/sun4i: csc: use layer arg instead of mixer

Layer will be more universal, due to DE33 support.

Reviewed-by: Chen-Yu Tsai <[e-mail]>
Tested-by: Ryan Walklin <[e-mail]>
Signed-off-by: Jernej Skrabec <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Chen-Yu Tsai <[e-mail]>

drivers/gpu/drm/sun4i/sun8i_csc.c

···
 	}
 }
 
-void sun8i_csc_config(struct sun8i_mixer *mixer, int layer,
+void sun8i_csc_config(struct sun8i_layer *layer,
 		      struct drm_plane_state *state)
 {
 	u32 mode = sun8i_csc_get_mode(state);
 	u32 base;
 
-	if (mixer->cfg->de_type == SUN8I_MIXER_DE3) {
-		sun8i_de3_ccsc_setup(mixer->engine.regs, layer,
+	if (layer->mixer->cfg->de_type == SUN8I_MIXER_DE3) {
+		sun8i_de3_ccsc_setup(layer->regs, layer->channel,
 				     mode, state->color_encoding,
 				     state->color_range);
 		return;
 	}
 
-	base = ccsc_base[mixer->cfg->ccsc][layer];
+	base = ccsc_base[layer->mixer->cfg->ccsc][layer->channel];
 
-	sun8i_csc_setup(mixer->engine.regs, base,
+	sun8i_csc_setup(layer->regs, base,
 			mode, state->color_encoding,
 			state->color_range);
 }

drivers/gpu/drm/sun4i/sun8i_csc.h

···
 #include <drm/drm_color_mgmt.h>
 
 struct drm_plane_state;
-struct sun8i_mixer;
+struct sun8i_layer;
 
 /* VI channel CSC units offsets */
 #define CCSC00_OFFSET 0xAA050
···
 
 #define SUN8I_CSC_CTRL_EN		BIT(0)
 
-void sun8i_csc_config(struct sun8i_mixer *mixer, int layer,
+void sun8i_csc_config(struct sun8i_layer *layer,
 		      struct drm_plane_state *state);
 
 #endif

drivers/gpu/drm/sun4i/sun8i_vi_layer.c

···
 
 	sun8i_vi_layer_update_attributes(layer, plane);
 	sun8i_vi_layer_update_coord(layer, plane);
-	sun8i_csc_config(layer->mixer, layer->channel, new_state);
+	sun8i_csc_config(layer, new_state);
 	sun8i_vi_layer_update_buffer(layer, plane);
 }