drivers/gpu/drm/rcar-du/rcar_du_vsp.c - kernel/quantenna - Git at Google

 /*
  * rcar_du_vsp.h  --  R-Car Display Unit VSP-Based Compositor
  *
  * 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.
  */

 #include <drm/drmP.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_plane_helper.h>

 #include <linux/of_platform.h>
 #include <linux/videodev2.h>

 #include <media/vsp1.h>

 #include "rcar_du_drv.h"
 #include "rcar_du_kms.h"
 #include "rcar_du_vsp.h"

 void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
 {
 	const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
 	struct rcar_du_device *rcdu = crtc->group->dev;
 	struct rcar_du_plane_state state = {
 		.state = {
 			.crtc = &crtc->crtc,
 			.crtc_x = 0,
 			.crtc_y = 0,
 			.crtc_w = mode->hdisplay,
 			.crtc_h = mode->vdisplay,
 			.src_x = 0,
 			.src_y = 0,
 			.src_w = mode->hdisplay << 16,
 			.src_h = mode->vdisplay << 16,
 		},
 		.format = rcar_du_format_info(DRM_FORMAT_ARGB8888),
 		.source = RCAR_DU_PLANE_VSPD1,
 		.alpha = 255,
 		.colorkey = 0,
 		.zpos = 0,
 	};

 	if (rcdu->info->gen >= 3)
 		state.hwindex = (crtc->index % 2) ? 2 : 0;
 	else
 		state.hwindex = crtc->index % 2;

 	__rcar_du_plane_setup(crtc->group, &state);

 	/* Ensure that the plane source configuration takes effect by requesting
 	 * a restart of the group. See rcar_du_plane_atomic_update() for a more
 	 * detailed explanation.
 	 *
 	 * TODO: Check whether this is still needed on Gen3.
 	 */
 	crtc->group->need_restart = true;

 	vsp1_du_setup_lif(crtc->vsp->vsp, mode->hdisplay, mode->vdisplay);
 }

 void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
 {
 	vsp1_du_setup_lif(crtc->vsp->vsp, 0, 0);
 }

 void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
 {
 	vsp1_du_atomic_begin(crtc->vsp->vsp);
 }

 void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
 {
 	vsp1_du_atomic_flush(crtc->vsp->vsp);
 }

 /* Keep the two tables in sync. */
 static const u32 formats_kms[] = {
 	DRM_FORMAT_RGB332,
 	DRM_FORMAT_ARGB4444,
 	DRM_FORMAT_XRGB4444,
 	DRM_FORMAT_ARGB1555,
 	DRM_FORMAT_XRGB1555,
 	DRM_FORMAT_RGB565,
 	DRM_FORMAT_BGR888,
 	DRM_FORMAT_RGB888,
 	DRM_FORMAT_BGRA8888,
 	DRM_FORMAT_BGRX8888,
 	DRM_FORMAT_ARGB8888,
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_UYVY,
 	DRM_FORMAT_VYUY,
 	DRM_FORMAT_YUYV,
 	DRM_FORMAT_YVYU,
 	DRM_FORMAT_NV12,
 	DRM_FORMAT_NV21,
 	DRM_FORMAT_NV16,
 	DRM_FORMAT_NV61,
 	DRM_FORMAT_YUV420,
 	DRM_FORMAT_YVU420,
 	DRM_FORMAT_YUV422,
 	DRM_FORMAT_YVU422,
 	DRM_FORMAT_YUV444,
 	DRM_FORMAT_YVU444,
 };

 static const u32 formats_v4l2[] = {
 	V4L2_PIX_FMT_RGB332,
 	V4L2_PIX_FMT_ARGB444,
 	V4L2_PIX_FMT_XRGB444,
 	V4L2_PIX_FMT_ARGB555,
 	V4L2_PIX_FMT_XRGB555,
 	V4L2_PIX_FMT_RGB565,
 	V4L2_PIX_FMT_RGB24,
 	V4L2_PIX_FMT_BGR24,
 	V4L2_PIX_FMT_ARGB32,
 	V4L2_PIX_FMT_XRGB32,
 	V4L2_PIX_FMT_ABGR32,
 	V4L2_PIX_FMT_XBGR32,
 	V4L2_PIX_FMT_UYVY,
 	V4L2_PIX_FMT_VYUY,
 	V4L2_PIX_FMT_YUYV,
 	V4L2_PIX_FMT_YVYU,
 	V4L2_PIX_FMT_NV12M,
 	V4L2_PIX_FMT_NV21M,
 	V4L2_PIX_FMT_NV16M,
 	V4L2_PIX_FMT_NV61M,
 	V4L2_PIX_FMT_YUV420M,
 	V4L2_PIX_FMT_YVU420M,
 	V4L2_PIX_FMT_YUV422M,
 	V4L2_PIX_FMT_YVU422M,
 	V4L2_PIX_FMT_YUV444M,
 	V4L2_PIX_FMT_YVU444M,
 };

 static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
 {
 	struct rcar_du_vsp_plane_state *state =
 		to_rcar_vsp_plane_state(plane->plane.state);
 	struct drm_framebuffer *fb = plane->plane.state->fb;
 	struct v4l2_rect src;
 	struct v4l2_rect dst;
 	dma_addr_t paddr[2] = { 0, };
 	u32 pixelformat = 0;
 	unsigned int i;

 	src.left = state->state.src_x >> 16;
 	src.top = state->state.src_y >> 16;
 	src.width = state->state.src_w >> 16;
 	src.height = state->state.src_h >> 16;

 	dst.left = state->state.crtc_x;
 	dst.top = state->state.crtc_y;
 	dst.width = state->state.crtc_w;
 	dst.height = state->state.crtc_h;

 	for (i = 0; i < state->format->planes; ++i) {
 		struct drm_gem_cma_object *gem;

 		gem = drm_fb_cma_get_gem_obj(fb, i);
 		paddr[i] = gem->paddr + fb->offsets[i];
 	}

 	for (i = 0; i < ARRAY_SIZE(formats_kms); ++i) {
 		if (formats_kms[i] == state->format->fourcc) {
 			pixelformat = formats_v4l2[i];
 			break;
 		}
 	}

 	WARN_ON(!pixelformat);

 	vsp1_du_atomic_update(plane->vsp->vsp, plane->index, pixelformat,
 			      fb->pitches[0], paddr, &src, &dst);
 }

 static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
 					  struct drm_plane_state *state)
 {
 	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
 	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
 	struct rcar_du_device *rcdu = rplane->vsp->dev;

 	if (!state->fb || !state->crtc) {
 		rstate->format = NULL;
 		return 0;
 	}

 	if (state->src_w >> 16 != state->crtc_w ||
 	    state->src_h >> 16 != state->crtc_h) {
 		dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
 		return -EINVAL;
 	}

 	rstate->format = rcar_du_format_info(state->fb->pixel_format);
 	if (rstate->format == NULL) {
 		dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
 			state->fb->pixel_format);
 		return -EINVAL;
 	}

 	return 0;
 }

 static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
 					struct drm_plane_state *old_state)
 {
 	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);

 	if (plane->state->crtc)
 		rcar_du_vsp_plane_setup(rplane);
 	else
 		vsp1_du_atomic_update(rplane->vsp->vsp, rplane->index, 0, 0, 0,
 				      NULL, NULL);
 }

 static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
 	.atomic_check = rcar_du_vsp_plane_atomic_check,
 	.atomic_update = rcar_du_vsp_plane_atomic_update,
 };

 static struct drm_plane_state *
 rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
 {
 	struct rcar_du_vsp_plane_state *state;
 	struct rcar_du_vsp_plane_state *copy;

 	if (WARN_ON(!plane->state))
 		return NULL;

 	state = to_rcar_vsp_plane_state(plane->state);
 	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
 	if (copy == NULL)
 		return NULL;

 	__drm_atomic_helper_plane_duplicate_state(plane, &copy->state);

 	return &copy->state;
 }

 static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
 						   struct drm_plane_state *state)
 {
 	__drm_atomic_helper_plane_destroy_state(state);
 	kfree(to_rcar_vsp_plane_state(state));
 }

 static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
 {
 	struct rcar_du_vsp_plane_state *state;

 	if (plane->state) {
 		rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
 		plane->state = NULL;
 	}

 	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (state == NULL)
 		return;

 	state->alpha = 255;

 	plane->state = &state->state;
 	plane->state->plane = plane;
 }

 static int rcar_du_vsp_plane_atomic_set_property(struct drm_plane *plane,
 	struct drm_plane_state *state, struct drm_property *property,
 	uint64_t val)
 {
 	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
 	struct rcar_du_device *rcdu = to_rcar_vsp_plane(plane)->vsp->dev;

 	if (property == rcdu->props.alpha)
 		rstate->alpha = val;
 	else
 		return -EINVAL;

 	return 0;
 }

 static int rcar_du_vsp_plane_atomic_get_property(struct drm_plane *plane,
 	const struct drm_plane_state *state, struct drm_property *property,
 	uint64_t *val)
 {
 	const struct rcar_du_vsp_plane_state *rstate =
 		container_of(state, const struct rcar_du_vsp_plane_state, state);
 	struct rcar_du_device *rcdu = to_rcar_vsp_plane(plane)->vsp->dev;

 	if (property == rcdu->props.alpha)
 		*val = rstate->alpha;
 	else
 		return -EINVAL;

 	return 0;
 }

 static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
 	.reset = rcar_du_vsp_plane_reset,
 	.set_property = drm_atomic_helper_plane_set_property,
 	.destroy = drm_plane_cleanup,
 	.atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
 	.atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
 	.atomic_set_property = rcar_du_vsp_plane_atomic_set_property,
 	.atomic_get_property = rcar_du_vsp_plane_atomic_get_property,
 };

 int rcar_du_vsp_init(struct rcar_du_vsp *vsp)
 {
 	struct rcar_du_device *rcdu = vsp->dev;
 	struct platform_device *pdev;
 	struct device_node *np;
 	unsigned int i;
 	int ret;

 	/* Find the VSP device and initialize it. */
 	np = of_parse_phandle(rcdu->dev->of_node, "vsps", vsp->index);
 	if (!np) {
 		dev_err(rcdu->dev, "vsps node not found\n");
 		return -ENXIO;
 	}

 	pdev = of_find_device_by_node(np);
 	of_node_put(np);
 	if (!pdev)
 		return -ENXIO;

 	vsp->vsp = &pdev->dev;

 	ret = vsp1_du_init(vsp->vsp);
 	if (ret < 0)
 		return ret;

 	 /* The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
 	  * 4 RPFs.
 	  */
 	vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;

 	vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
 				   sizeof(*vsp->planes), GFP_KERNEL);
 	if (!vsp->planes)
 		return -ENOMEM;

 	for (i = 0; i < vsp->num_planes; ++i) {
 		enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY
 					 : DRM_PLANE_TYPE_PRIMARY;
 		struct rcar_du_vsp_plane *plane = &vsp->planes[i];

 		plane->vsp = vsp;
 		plane->index = i;

 		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane,
 					       1 << vsp->index,
 					       &rcar_du_vsp_plane_funcs,
 					       formats_kms,
 					       ARRAY_SIZE(formats_kms), type,
 					       NULL);
 		if (ret < 0)
 			return ret;

 		drm_plane_helper_add(&plane->plane,
 				     &rcar_du_vsp_plane_helper_funcs);

 		if (type == DRM_PLANE_TYPE_PRIMARY)
 			continue;

 		drm_object_attach_property(&plane->plane.base,
 					   rcdu->props.alpha, 255);
 	}

 	return 0;
 }
	/*
	* rcar_du_vsp.h -- R-Car Display Unit VSP-Based Compositor
	*
	* 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.
	*/

	#include <drm/drmP.h>
	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_crtc.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_fb_cma_helper.h>
	#include <drm/drm_gem_cma_helper.h>
	#include <drm/drm_plane_helper.h>

	#include <linux/of_platform.h>
	#include <linux/videodev2.h>

	#include <media/vsp1.h>

	#include "rcar_du_drv.h"
	#include "rcar_du_kms.h"
	#include "rcar_du_vsp.h"

	void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
	{
	const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
	struct rcar_du_device *rcdu = crtc->group->dev;
	struct rcar_du_plane_state state = {
	.state = {
	.crtc = &crtc->crtc,
	.crtc_x = 0,
	.crtc_y = 0,
	.crtc_w = mode->hdisplay,
	.crtc_h = mode->vdisplay,
	.src_x = 0,
	.src_y = 0,
	.src_w = mode->hdisplay << 16,
	.src_h = mode->vdisplay << 16,
	},
	.format = rcar_du_format_info(DRM_FORMAT_ARGB8888),
	.source = RCAR_DU_PLANE_VSPD1,
	.alpha = 255,
	.colorkey = 0,
	.zpos = 0,
	};

	if (rcdu->info->gen >= 3)
	state.hwindex = (crtc->index % 2) ? 2 : 0;
	else
	state.hwindex = crtc->index % 2;

	__rcar_du_plane_setup(crtc->group, &state);

	/* Ensure that the plane source configuration takes effect by requesting
	* a restart of the group. See rcar_du_plane_atomic_update() for a more
	* detailed explanation.
	*
	* TODO: Check whether this is still needed on Gen3.
	*/
	crtc->group->need_restart = true;

	vsp1_du_setup_lif(crtc->vsp->vsp, mode->hdisplay, mode->vdisplay);
	}

	void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
	{
	vsp1_du_setup_lif(crtc->vsp->vsp, 0, 0);
	}

	void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
	{
	vsp1_du_atomic_begin(crtc->vsp->vsp);
	}

	void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
	{
	vsp1_du_atomic_flush(crtc->vsp->vsp);
	}

	/* Keep the two tables in sync. */
	static const u32 formats_kms[] = {
	DRM_FORMAT_RGB332,
	DRM_FORMAT_ARGB4444,
	DRM_FORMAT_XRGB4444,
	DRM_FORMAT_ARGB1555,
	DRM_FORMAT_XRGB1555,
	DRM_FORMAT_RGB565,
	DRM_FORMAT_BGR888,
	DRM_FORMAT_RGB888,
	DRM_FORMAT_BGRA8888,
	DRM_FORMAT_BGRX8888,
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_UYVY,
	DRM_FORMAT_VYUY,
	DRM_FORMAT_YUYV,
	DRM_FORMAT_YVYU,
	DRM_FORMAT_NV12,
	DRM_FORMAT_NV21,
	DRM_FORMAT_NV16,
	DRM_FORMAT_NV61,
	DRM_FORMAT_YUV420,
	DRM_FORMAT_YVU420,
	DRM_FORMAT_YUV422,
	DRM_FORMAT_YVU422,
	DRM_FORMAT_YUV444,
	DRM_FORMAT_YVU444,
	};

	static const u32 formats_v4l2[] = {
	V4L2_PIX_FMT_RGB332,
	V4L2_PIX_FMT_ARGB444,
	V4L2_PIX_FMT_XRGB444,
	V4L2_PIX_FMT_ARGB555,
	V4L2_PIX_FMT_XRGB555,
	V4L2_PIX_FMT_RGB565,
	V4L2_PIX_FMT_RGB24,
	V4L2_PIX_FMT_BGR24,
	V4L2_PIX_FMT_ARGB32,
	V4L2_PIX_FMT_XRGB32,
	V4L2_PIX_FMT_ABGR32,
	V4L2_PIX_FMT_XBGR32,
	V4L2_PIX_FMT_UYVY,
	V4L2_PIX_FMT_VYUY,
	V4L2_PIX_FMT_YUYV,
	V4L2_PIX_FMT_YVYU,
	V4L2_PIX_FMT_NV12M,
	V4L2_PIX_FMT_NV21M,
	V4L2_PIX_FMT_NV16M,
	V4L2_PIX_FMT_NV61M,
	V4L2_PIX_FMT_YUV420M,
	V4L2_PIX_FMT_YVU420M,
	V4L2_PIX_FMT_YUV422M,
	V4L2_PIX_FMT_YVU422M,
	V4L2_PIX_FMT_YUV444M,
	V4L2_PIX_FMT_YVU444M,
	};

	static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
	{
	struct rcar_du_vsp_plane_state *state =
	to_rcar_vsp_plane_state(plane->plane.state);
	struct drm_framebuffer *fb = plane->plane.state->fb;
	struct v4l2_rect src;
	struct v4l2_rect dst;
	dma_addr_t paddr[2] = { 0, };
	u32 pixelformat = 0;
	unsigned int i;

	src.left = state->state.src_x >> 16;
	src.top = state->state.src_y >> 16;
	src.width = state->state.src_w >> 16;
	src.height = state->state.src_h >> 16;

	dst.left = state->state.crtc_x;
	dst.top = state->state.crtc_y;
	dst.width = state->state.crtc_w;
	dst.height = state->state.crtc_h;

	for (i = 0; i < state->format->planes; ++i) {
	struct drm_gem_cma_object *gem;

	gem = drm_fb_cma_get_gem_obj(fb, i);
	paddr[i] = gem->paddr + fb->offsets[i];
	}

	for (i = 0; i < ARRAY_SIZE(formats_kms); ++i) {
	if (formats_kms[i] == state->format->fourcc) {
	pixelformat = formats_v4l2[i];
	break;
	}
	}

	WARN_ON(!pixelformat);

	vsp1_du_atomic_update(plane->vsp->vsp, plane->index, pixelformat,
	fb->pitches[0], paddr, &src, &dst);
	}

	static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
	struct drm_plane_state *state)
	{
	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
	struct rcar_du_device *rcdu = rplane->vsp->dev;

	if (!state->fb \|\| !state->crtc) {
	rstate->format = NULL;
	return 0;
	}

	if (state->src_w >> 16 != state->crtc_w \|\|
	state->src_h >> 16 != state->crtc_h) {
	dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
	return -EINVAL;
	}

	rstate->format = rcar_du_format_info(state->fb->pixel_format);
	if (rstate->format == NULL) {
	dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
	state->fb->pixel_format);
	return -EINVAL;
	}

	return 0;
	}

	static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
	struct drm_plane_state *old_state)
	{
	struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);

	if (plane->state->crtc)
	rcar_du_vsp_plane_setup(rplane);
	else
	vsp1_du_atomic_update(rplane->vsp->vsp, rplane->index, 0, 0, 0,
	NULL, NULL);
	}

	static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
	.atomic_check = rcar_du_vsp_plane_atomic_check,
	.atomic_update = rcar_du_vsp_plane_atomic_update,
	};

	static struct drm_plane_state *
	rcar_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
	{
	struct rcar_du_vsp_plane_state *state;
	struct rcar_du_vsp_plane_state *copy;

	if (WARN_ON(!plane->state))
	return NULL;

	state = to_rcar_vsp_plane_state(plane->state);
	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
	if (copy == NULL)
	return NULL;

	__drm_atomic_helper_plane_duplicate_state(plane, &copy->state);

	return &copy->state;
	}

	static void rcar_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
	struct drm_plane_state *state)
	{
	__drm_atomic_helper_plane_destroy_state(state);
	kfree(to_rcar_vsp_plane_state(state));
	}

	static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
	{
	struct rcar_du_vsp_plane_state *state;

	if (plane->state) {
	rcar_du_vsp_plane_atomic_destroy_state(plane, plane->state);
	plane->state = NULL;
	}

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (state == NULL)
	return;

	state->alpha = 255;

	plane->state = &state->state;
	plane->state->plane = plane;
	}

	static int rcar_du_vsp_plane_atomic_set_property(struct drm_plane *plane,
	struct drm_plane_state state, struct drm_property property,
	uint64_t val)
	{
	struct rcar_du_vsp_plane_state *rstate = to_rcar_vsp_plane_state(state);
	struct rcar_du_device *rcdu = to_rcar_vsp_plane(plane)->vsp->dev;

	if (property == rcdu->props.alpha)
	rstate->alpha = val;
	else
	return -EINVAL;

	return 0;
	}

	static int rcar_du_vsp_plane_atomic_get_property(struct drm_plane *plane,
	const struct drm_plane_state state, struct drm_property property,
	uint64_t *val)
	{
	const struct rcar_du_vsp_plane_state *rstate =
	container_of(state, const struct rcar_du_vsp_plane_state, state);
	struct rcar_du_device *rcdu = to_rcar_vsp_plane(plane)->vsp->dev;

	if (property == rcdu->props.alpha)
	*val = rstate->alpha;
	else
	return -EINVAL;

	return 0;
	}

	static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.reset = rcar_du_vsp_plane_reset,
	.set_property = drm_atomic_helper_plane_set_property,
	.destroy = drm_plane_cleanup,
	.atomic_duplicate_state = rcar_du_vsp_plane_atomic_duplicate_state,
	.atomic_destroy_state = rcar_du_vsp_plane_atomic_destroy_state,
	.atomic_set_property = rcar_du_vsp_plane_atomic_set_property,
	.atomic_get_property = rcar_du_vsp_plane_atomic_get_property,
	};

	int rcar_du_vsp_init(struct rcar_du_vsp *vsp)
	{
	struct rcar_du_device *rcdu = vsp->dev;
	struct platform_device *pdev;
	struct device_node *np;
	unsigned int i;
	int ret;

	/* Find the VSP device and initialize it. */
	np = of_parse_phandle(rcdu->dev->of_node, "vsps", vsp->index);
	if (!np) {
	dev_err(rcdu->dev, "vsps node not found\n");
	return -ENXIO;
	}

	pdev = of_find_device_by_node(np);
	of_node_put(np);
	if (!pdev)
	return -ENXIO;

	vsp->vsp = &pdev->dev;

	ret = vsp1_du_init(vsp->vsp);
	if (ret < 0)
	return ret;

	/* The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
	* 4 RPFs.
	*/
	vsp->num_planes = rcdu->info->gen >= 3 ? 5 : 4;

	vsp->planes = devm_kcalloc(rcdu->dev, vsp->num_planes,
	sizeof(*vsp->planes), GFP_KERNEL);
	if (!vsp->planes)
	return -ENOMEM;

	for (i = 0; i < vsp->num_planes; ++i) {
	enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY
	: DRM_PLANE_TYPE_PRIMARY;
	struct rcar_du_vsp_plane *plane = &vsp->planes[i];

	plane->vsp = vsp;
	plane->index = i;

	ret = drm_universal_plane_init(rcdu->ddev, &plane->plane,
	1 << vsp->index,
	&rcar_du_vsp_plane_funcs,
	formats_kms,
	ARRAY_SIZE(formats_kms), type,
	NULL);
	if (ret < 0)
	return ret;

	drm_plane_helper_add(&plane->plane,
	&rcar_du_vsp_plane_helper_funcs);

	if (type == DRM_PLANE_TYPE_PRIMARY)
	continue;

	drm_object_attach_property(&plane->plane.base,
	rcdu->props.alpha, 255);
	}

	return 0;
	}