drm/rcar-du: Introduce CRTCs groups

The R8A7779 DU is split in per-CRTC resources (scan-out engine, blending
unit, timings generator, ...) and device-global resources (start/stop
control, planes, ...) shared between the two CRTCs.

The R8A7790 introduced a third CRTC with its own set of global resources
This would be modeled as two separate DU device instances if it wasn't
for a handful or resources that are shared between the three CRTCs
(mostly related to input and output routing). For this reason the
R8A7790 DU must be modeled as a single device with three CRTCs, two sets
of "semi-global" resources, and a few device-global resources.

Introduce a new rcar_du_group driver-specific object, without any real
counterpart in the DU documentation, that models those semi-global
resources.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

1 files changed, 3 insertions, 7 deletions

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 0305c21d71f3..5b57a2f9b52a 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -18,11 +18,12 @@
 #include <linux/platform_data/rcar-du.h>
 
 #include "rcar_du_crtc.h"
-#include "rcar_du_plane.h"
+#include "rcar_du_group.h"
 
 struct clk;
 struct device;
 struct drm_device;
+struct rcar_du_device;
 
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	(1 << 0)	/* Per-CRTC IRQ and clock */
 
@@ -40,15 +41,13 @@ struct rcar_du_device {
 	const struct rcar_du_device_info *info;
 
 	void __iomem *mmio;
-	unsigned int use_count;
 
 	struct drm_device *ddev;
 
 	struct rcar_du_crtc crtcs[2];
-	unsigned int used_crtcs;
 	unsigned int num_crtcs;
 
-	struct rcar_du_planes planes;
+	struct rcar_du_group group;
 };
 
 static inline bool rcar_du_has(struct rcar_du_device *rcdu,
@@ -57,9 +56,6 @@ static inline bool rcar_du_has(struct rcar_du_device *rcdu,
 	return rcdu->info->features & feature;
 }
 
-int rcar_du_get(struct rcar_du_device *rcdu);
-void rcar_du_put(struct rcar_du_device *rcdu);
-
 static inline u32 rcar_du_read(struct rcar_du_device *rcdu, u32 reg)
 {
 	return ioread32(rcdu->mmio + reg);