drm/komeda: Computing image enhancer internally

Enable image enhancer when the input data flow is 2x+ upscaling.
Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190708070000.4945-1-james.qian.wang@arm.com

drivers/gpu/drm/arm/display/komeda/komeda_kms.h

@@ -47,11 +47,8 @@ struct komeda_plane_state {
 	/** @zlist_node: zorder list node */
 	struct list_head zlist_node;
 
-	/* @img_enhancement: on/off image enhancement
-	 * @layer_split: on/off layer_split
-	 */
-	u8 img_enhancement : 1,
-	   layer_split : 1;
+	/** @layer_split: on/off layer_split */
+	u8 layer_split : 1;
 };
 
 /**

drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c

@@ -806,6 +806,10 @@ void komeda_complete_data_flow_cfg(struct komeda_layer *layer,
 	dflow->en_scaling = (w != dflow->out_w) || (h != dflow->out_h);
 	dflow->is_yuv = fb->format->is_yuv;
 
+	/* try to enable image enhancer if data flow is a 2x+ upscaling */
+	dflow->en_img_enhancement = dflow->out_w >= 2 * w ||
+				    dflow->out_h >= 2 * h;
+
 	/* try to enable split if scaling exceed the scaler's acceptable
 	 * input/output range.
 	 */

drivers/gpu/drm/arm/display/komeda/komeda_plane.c

@@ -18,7 +18,6 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
 			    struct komeda_data_flow_cfg *dflow)
 {
 	struct komeda_plane *kplane = to_kplane(st->plane);
-	struct komeda_plane_state *kplane_st = to_kplane_st(st);
 	struct drm_framebuffer *fb = st->fb;
 	const struct komeda_format_caps *caps = to_kfb(fb)->format_caps;
 	struct komeda_pipeline *pipe = kplane->layer->base.pipeline;
@@ -57,8 +56,6 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
 		return -EINVAL;
 	}
 
-	dflow->en_img_enhancement = !!kplane_st->img_enhancement;
-
 	komeda_complete_data_flow_cfg(kplane->layer, dflow, fb);
 
 	return 0;
@@ -174,8 +171,6 @@ komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
 
 	old = to_kplane_st(plane->state);
 
-	new->img_enhancement = old->img_enhancement;
-
 	return &new->base;
 }