[media] v4l: vsp1: Add VSP+DU support

Implement internal control of the VSP pipeline to be used by the DU
DRM/KMS driver when using the VSP as an internal composer handled
through DRM/KMS only.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/vsp1/Makefile

 vsp1-y					:= vsp1_drv.o vsp1_entity.o vsp1_pipe.o
-vsp1-y					+= vsp1_video.o
+vsp1-y					+= vsp1_drm.o vsp1_video.o
 vsp1-y					+= vsp1_rpf.o vsp1_rwpf.o vsp1_wpf.o
 vsp1-y					+= vsp1_hsit.o vsp1_lif.o vsp1_lut.o
 vsp1-y					+= vsp1_bru.o vsp1_sru.o vsp1_uds.o

drivers/media/platform/vsp1/vsp1.h

@@ -26,6 +26,7 @@
 struct clk;
 struct device;
 
+struct vsp1_drm;
 struct vsp1_platform_data;
 struct vsp1_bru;
 struct vsp1_hsit;
@@ -78,8 +79,8 @@ struct vsp1_device {
 
 	struct v4l2_device v4l2_dev;
 	struct media_device media_dev;
-
 	struct media_entity_operations media_ops;
+	struct vsp1_drm *drm;
 };
 
 int vsp1_device_get(struct vsp1_device *vsp1);

drivers/media/platform/vsp1/vsp1_drm.h

+/*
+ * vsp1_drm.h  --  R-Car VSP1 DRM/KMS Interface
+ *
+ * Copyright (C) 2015 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef __VSP1_DRM_H__
+#define __VSP1_DRM_H__
+
+#include "vsp1_pipe.h"
+
+struct vsp1_drm {
+	struct vsp1_pipeline pipe;
+	bool update;
+};
+
+int vsp1_drm_init(struct vsp1_device *vsp1);
+int vsp1_drm_create_links(struct vsp1_device *vsp1);
+
+#endif /* __VSP1_DRM_H__ */

drivers/media/platform/vsp1/vsp1_drv.c

@@ -25,6 +25,7 @@
 
 #include "vsp1.h"
 #include "vsp1_bru.h"
+#include "vsp1_drm.h"
 #include "vsp1_hsit.h"
 #include "vsp1_lif.h"
 #include "vsp1_lut.h"
@@ -120,7 +121,7 @@ static int vsp1_create_sink_links(struct vsp1_device *vsp1,
 	return 0;
 }
 
-static int vsp1_create_links(struct vsp1_device *vsp1)
+static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
 {
 	struct vsp1_entity *entity;
 	unsigned int i;
@@ -145,9 +146,6 @@ static int vsp1_create_links(struct vsp1_device *vsp1)
 			return ret;
 	}
 
-	if (!vsp1->pdata.uapi)
-		return 0;
-
 	for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
 		struct vsp1_rwpf *rpf = vsp1->rpf[i];
 
@@ -360,15 +358,22 @@ static int vsp1_create_entities(struct vsp1_device *vsp1)
 	}
 
 	/* Create links. */
-	ret = vsp1_create_links(vsp1);
+	if (vsp1->pdata.uapi)
+		ret = vsp1_uapi_create_links(vsp1);
+	else
+		ret = vsp1_drm_create_links(vsp1);
 	if (ret < 0)
 		goto done;
 
-	if (vsp1->pdata.uapi) {
+	/* Register subdev nodes if the userspace API is enabled or initialize
+	 * the DRM pipeline otherwise.
+	 */
+	if (vsp1->pdata.uapi)
 		ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
+	else
+		ret = vsp1_drm_init(vsp1);
 	if (ret < 0)
 		goto done;
-	}
 
 	ret = media_device_register(mdev);
 

include/media/vsp1.h

+/*
+ * vsp1.h  --  R-Car VSP1 API
+ *
+ * Copyright (C) 2015 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef __MEDIA_VSP1_H__
+#define __MEDIA_VSP1_H__
+
+#include <linux/types.h>
+
+struct device;
+struct v4l2_rect;
+
+int vsp1_du_init(struct device *dev);
+
+int vsp1_du_setup_lif(struct device *dev, unsigned int width,
+		      unsigned int height);
+
+int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf, u32 pixelformat,
+		      unsigned int pitch, dma_addr_t mem[2],
+		      const struct v4l2_rect *src, const struct v4l2_rect *dst);
+
+#endif /* __MEDIA_VSP1_H__ */