[PATCH 06/11] drm/sun4i: Drop primary layer pointer from sun4i_drv

[wens@csie.org (Chen-Yu Tsai)]

The current layer init code keeps a pointer to the primary plane layer
in sun4i_drv. When we eventually support multiple display pipelines,
this would force us to keep track of primary planes for all crtcs. And
these pointers only get used at bind time.

Instead, have the crtc init code iterate through the returned layers
to find the primary and cursor layers. And drop the pointer from the
sun4i_drv structure.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/gpu/drm/sun4i/sun4i_crtc.c  | 25 +++++++++++++++++++++----
 drivers/gpu/drm/sun4i/sun4i_drv.h   |  1 -
 drivers/gpu/drm/sun4i/sun4i_layer.c |  3 ---
 3 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
index 1d01667fa45d..cb1a901bc389 100644
--- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
@@ -119,7 +119,8 @@ struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
 {
 	struct sun4i_drv *drv = drm->dev_private;
 	struct sun4i_crtc *scrtc;
-	int ret;
+	struct drm_plane *primary = NULL, *cursor = NULL;
+	int ret, i;
 
 	scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL);
 	if (!scrtc)
@@ -130,12 +131,28 @@ struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
 	scrtc->layers = sun4i_layers_init(drm);
 	if (IS_ERR(scrtc->layers)) {
 		dev_err(drm->dev, "Couldn't create the planes\n");
-		return ERR_CAST(scrtc->layers);
+		return NULL;
+	}
+
+	/* find primary and cursor planes for drm_crtc_init_with_planes */
+	for (i = 0; scrtc->layers[i]; i++) {
+		struct sun4i_layer *layer = scrtc->layers[i];
+
+		switch (layer->plane.type) {
+		case DRM_PLANE_TYPE_PRIMARY:
+			primary = &layer->plane;
+			break;
+		case DRM_PLANE_TYPE_CURSOR:
+			cursor = &layer->plane;
+			break;
+		default:
+			break;
+		}
 	}
 
 	ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
-					drv->primary,
-					NULL,
+					primary,
+					cursor,
 					&sun4i_crtc_funcs,
 					NULL);
 	if (ret) {
diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.h b/drivers/gpu/drm/sun4i/sun4i_drv.h
index 7a3345b7b6d1..5df50126ff52 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.h
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.h
@@ -20,7 +20,6 @@ struct sun4i_drv {
 	struct sun4i_backend	*backend;
 	struct sun4i_tcon	*tcon;
 
-	struct drm_plane	*primary;
 	struct drm_fbdev_cma	*fbdev;
 };
 
diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c
index 0b703fb02656..9c0baee25fae 100644
--- a/drivers/gpu/drm/sun4i/sun4i_layer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_layer.c
@@ -127,9 +127,6 @@ static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
 			     &sun4i_backend_layer_helper_funcs);
 	layer->drv = drv;
 
-	if (plane->type == DRM_PLANE_TYPE_PRIMARY)
-		drv->primary = &layer->plane;
-
 	return layer;
 }
 
-- 
2.11.0