drm: rcar-du: Remove local CRTC enabled state

The atomic framework guarantees that the CRTC enable and disable
functions will only be called when needed, there's no need to duplicate
the CRTC state check. By replacing the local CRTC enabled state check at
resume time with the CRTC active state we can remove the local CRTC
enabled state altogether.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

drivers/gpu/drm/rcar-du/rcar_du_crtc.c

@@ -418,7 +418,7 @@ void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc)
 {
 	unsigned int i;
 
-	if (!rcrtc->enabled)
+	if (!rcrtc->crtc.state->active)
 		return;
 
 	rcar_du_crtc_get(rcrtc);
@@ -445,26 +445,17 @@ static void rcar_du_crtc_enable(struct drm_crtc *crtc)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 
-	if (rcrtc->enabled)
-		return;
-
 	rcar_du_crtc_get(rcrtc);
 	rcar_du_crtc_start(rcrtc);
-
-	rcrtc->enabled = true;
 }
 
 static void rcar_du_crtc_disable(struct drm_crtc *crtc)
 {
 	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
 
-	if (!rcrtc->enabled)
-		return;
-
 	rcar_du_crtc_stop(rcrtc);
 	rcar_du_crtc_put(rcrtc);
 
-	rcrtc->enabled = false;
 	rcrtc->outputs = 0;
 }
 
@@ -589,7 +580,6 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index)
 	rcrtc->group = rgrp;
 	rcrtc->mmio_offset = mmio_offsets[index];
 	rcrtc->index = index;
-	rcrtc->enabled = false;
 
 	ret = drm_crtc_init_with_planes(rcdu->ddev, crtc,
 					&rgrp->planes[index % 2].plane,

drivers/gpu/drm/rcar-du/rcar_du_crtc.h

@@ -33,7 +33,6 @@ struct rcar_du_group;
  * @event: event to post when the pending page flip completes
  * @flip_wait: wait queue used to signal page flip completion
  * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
- * @enabled: whether the CRTC is enabled, used to control system resume
  * @group: CRTC group this CRTC belongs to
  */
 struct rcar_du_crtc {
@@ -49,7 +48,6 @@ struct rcar_du_crtc {
 	wait_queue_head_t flip_wait;
 
 	unsigned int outputs;
-	bool enabled;
 
 	struct rcar_du_group *group;
 };