/*

 * Copyright (C) 2013 Samsung Electronics Co.Ltd

 * Authors:

 *	Inki Dae <inki.dae@samsung.com>

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <errno.h>

#include <time.h>

#include <unistd.h>

#include <sys/mman.h>

#include <linux/stddef.h>

#include <xf86drm.h>

#include <xf86drmMode.h>

#include <libkms.h>

#include <drm_fourcc.h>

#include "exynos_drm.h"

#include "exynos_drmif.h"

#include "exynos_fimg2d.h"

#define DRM_MODULE_NAME		"exynos"

static unsigned int screen_width, screen_height;

struct connector {

	uint32_t id;

	char mode_str[64];

	drmModeModeInfo *mode;

	drmModeEncoder *encoder;

	int crtc;

};

static void connector_find_mode(int fd, struct connector *c,

				drmModeRes *resources)

{

	drmModeConnector *connector;

	int i, j;

	/* First, find the connector & mode */

	c->mode = NULL;

	for (i = 0; i < resources->count_connectors; i++) {

		connector = drmModeGetConnector(fd, resources->connectors[i]);

		if (!connector) {

			fprintf(stderr, "could not get connector %i: %s\n",

				resources->connectors[i], strerror(errno));

			continue;

		}

		if (!connector->count_modes) {

			drmModeFreeConnector(connector);

			continue;

		}

		if (connector->connector_id != c->id) {

			drmModeFreeConnector(connector);

			continue;

		}

		for (j = 0; j < connector->count_modes; j++) {

			c->mode = &connector->modes[j];

			if (!strcmp(c->mode->name, c->mode_str))

				break;

		}

		/* Found it, break out */

		if (c->mode)

			break;

		drmModeFreeConnector(connector);

	}

	if (!c->mode) {

		fprintf(stderr, "failed to find mode \"%s\"\n", c->mode_str);

		return;

	}

	/* Now get the encoder */

	for (i = 0; i < resources->count_encoders; i++) {

		c->encoder = drmModeGetEncoder(fd, resources->encoders[i]);

		if (!c->encoder) {

			fprintf(stderr, "could not get encoder %i: %s\n",

				resources->encoders[i], strerror(errno));

			continue;

		}

		if (c->encoder->encoder_id  == connector->encoder_id)

			break;

		drmModeFreeEncoder(c->encoder);

	}

	if (c->crtc == -1)

		c->crtc = c->encoder->crtc_id;

}

static int drm_set_crtc(struct exynos_device *dev, struct connector *c,

			unsigned int fb_id)

{

	int ret;

	ret = drmModeSetCrtc(dev->fd, c->crtc,

			fb_id, 0, 0, &c->id, 1, c->mode);

	if (ret)

		drmMsg("failed to set mode: %s\n", strerror(errno));

	return ret;

}

static struct exynos_bo *exynos_create_buffer(struct exynos_device *dev,

						unsigned long size,

						unsigned int flags)

{

	struct exynos_bo *bo;

	bo = exynos_bo_create(dev, size, flags);

	if (!bo)

		return bo;

	if (!exynos_bo_map(bo)) {

		exynos_bo_destroy(bo);

		return NULL;

	}

	return bo;

}

/* Allocate buffer and fill it with checkerboard pattern, where the tiles *

 * have a random color. The caller has to free the buffer.                */

static void *create_checkerboard_pattern(unsigned int num_tiles_x,

						unsigned int num_tiles_y, unsigned int tile_size)

{

	unsigned int *buf;

	unsigned int x, y, i, j;

	const unsigned int stride = num_tiles_x * tile_size;

	if (posix_memalign((void*)&buf, 64, num_tiles_y * tile_size * stride * 4) != 0)

		return NULL;

	for (x = 0; x < num_tiles_x; ++x) {

		for (y = 0; y < num_tiles_y; ++y) {

			const unsigned int color = 0xff000000 + (random() & 0xffffff);

			for (i = 0; i < tile_size; ++i) {

				for (j = 0; j < tile_size; ++j) {

					buf[x * tile_size + y * stride * tile_size + i + j * stride] = color;

				}

			}

		}

	}

	return buf;

}

static void exynos_destroy_buffer(struct exynos_bo *bo)

{

	exynos_bo_destroy(bo);

}

static void wait_for_user_input(int last)

{

	printf("press <ENTER> to %s\n", last ? "exit test application" :

			"skip to next test");

	getchar();

}

static int g2d_solid_fill_test(struct exynos_device *dev, struct exynos_bo *dst)

{

	struct g2d_context *ctx;

	struct g2d_image img = {0};

	unsigned int count, img_w, img_h;

	int ret = 0;

	ctx = g2d_init(dev->fd);

	if (!ctx)

		return -EFAULT;

	img.bo[0] = dst->handle;

	printf("solid fill test.\n");

	srand(time(NULL));

	img_w = screen_width;

	img_h = screen_height;

	for (count = 0; count < 2; count++) {

		unsigned int x, y, w, h;

		x = rand() % (img_w / 2);

		y = rand() % (img_h / 2);

		w = rand() % (img_w - x);

		h = rand() % (img_h - y);

		img.width = img_w;

		img.height = img_h;

		img.stride = img.width * 4;

		img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

		img.color = 0xff000000 + (random() & 0xffffff);

		ret = g2d_solid_fill(ctx, &img, x, y, w, h);

		if (ret < 0)

			goto err_fini;

		ret = g2d_exec(ctx);

		if (ret < 0)

			break;

	}

err_fini:

	g2d_fini(ctx);

	return ret;

}

static int g2d_copy_test(struct exynos_device *dev, struct exynos_bo *src,

				struct exynos_bo *dst,

				enum e_g2d_buf_type type)

{

	struct g2d_context *ctx;

	struct g2d_image src_img = {0}, dst_img = {0};

	unsigned int src_x, src_y, dst_x, dst_y, img_w, img_h;

	unsigned long userptr, size;

	int ret;

	ctx = g2d_init(dev->fd);

	if (!ctx)

		return -EFAULT;

	dst_img.bo[0] = dst->handle;

	src_x = 0;

	src_y = 0;

	dst_x = 0;

	dst_y = 0;

	img_w = screen_width;

	img_h = screen_height;

	switch (type) {

	case G2D_IMGBUF_GEM:

		src_img.bo[0] = src->handle;

		break;

	case G2D_IMGBUF_USERPTR:

		size = img_w * img_h * 4;

		userptr = (unsigned long)malloc(size);

		if (!userptr) {

			fprintf(stderr, "failed to allocate userptr.\n");

			ret = -EFAULT;

			goto fail;

		}

		src_img.user_ptr[0].userptr = userptr;

		src_img.user_ptr[0].size = size;

		break;

	case G2D_IMGBUF_COLOR:

	default:

		ret = -EFAULT;

		goto fail;

	}

	printf("copy test with %s.\n",

			type == G2D_IMGBUF_GEM ? "gem" : "userptr");

	src_img.width = img_w;

	src_img.height = img_h;

	src_img.stride = src_img.width * 4;

	src_img.buf_type = type;

	src_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	src_img.color = 0xffff0000;

	ret = g2d_solid_fill(ctx, &src_img, src_x, src_y, img_w, img_h);

	if (ret < 0)

		goto err_free_userptr;

	dst_img.width = img_w;

	dst_img.height = img_h;

	dst_img.stride = dst_img.width * 4;

	dst_img.buf_type = G2D_IMGBUF_GEM;

	dst_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	ret = g2d_copy(ctx, &src_img, &dst_img, src_x, src_y, dst_x, dst_y,

			img_w - 4, img_h - 4);

	if (ret < 0)

		goto err_free_userptr;

	g2d_exec(ctx);

err_free_userptr:

	if (type == G2D_IMGBUF_USERPTR)

		if (userptr)

			free((void *)userptr);

fail:

	g2d_fini(ctx);

	return ret;

}

static int g2d_move_test(struct exynos_device *dev,

				struct exynos_bo *tmp,

				struct exynos_bo *buf,

				enum e_g2d_buf_type type)

{

	struct g2d_context *ctx;

	struct g2d_image img = {0}, tmp_img = {0};

	unsigned int img_w, img_h, count;

	int cur_x, cur_y;

	void *checkerboard;

	int ret;

	static const struct g2d_step {

		int x, y;

	} steps[] = {

		{ 1,  0}, { 0,  1},

		{-1,  0}, { 0, -1},

		{ 1,  1}, {-1, -1},

		{ 1, -1}, {-1,  1},

		{ 2,  1}, { 1,  2},

		{-2, -1}, {-1, -2},

		{ 2, -1}, { 1, -2},

		{-2,  1}, {-1,  2}

	};

	static const unsigned int num_steps =

		sizeof(steps) / sizeof(struct g2d_step);

	ctx = g2d_init(dev->fd);

	if (!ctx)

		return -EFAULT;

	img.bo[0] = buf->handle;

	/* create pattern of half the screen size */

	checkerboard = create_checkerboard_pattern(screen_width / 64, screen_height / 64, 32);

	if (!checkerboard) {

		ret = -EFAULT;

		goto fail;

	}

	img_w = (screen_width / 64) * 32;

	img_h = (screen_height / 64) * 32;

	switch (type) {

	case G2D_IMGBUF_GEM:

		memcpy(tmp->vaddr, checkerboard, img_w * img_h * 4);

		tmp_img.bo[0] = tmp->handle;

		break;

	case G2D_IMGBUF_USERPTR:

		tmp_img.user_ptr[0].userptr = (unsigned long)checkerboard;

		tmp_img.user_ptr[0].size = img_w * img_h * 4;

		break;

	case G2D_IMGBUF_COLOR:

	default:

		ret = -EFAULT;

		goto fail;

	}

	/* solid fill framebuffer with white color */

	img.width = screen_width;

	img.height = screen_height;

	img.stride = screen_width * 4;

	img.buf_type = G2D_IMGBUF_GEM;

	img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	img.color = 0xffffffff;

	/* put checkerboard pattern in the center of the framebuffer */

	cur_x = (screen_width - img_w) / 2;

	cur_y = (screen_height - img_h) / 2;

	tmp_img.width = img_w;

	tmp_img.height = img_h;

	tmp_img.stride = img_w * 4;

	tmp_img.buf_type = type;

	tmp_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	ret = g2d_solid_fill(ctx, &img, 0, 0, screen_width, screen_height) ||

		g2d_copy(ctx, &tmp_img, &img, 0, 0, cur_x, cur_y, img_w, img_h);

	if (!ret)

		ret = g2d_exec(ctx);

	if (ret < 0)

			goto fail;

	printf("move test with %s.\n",

			type == G2D_IMGBUF_GEM ? "gem" : "userptr");

	srand(time(NULL));

	for (count = 0; count < 256; ++count) {

		const struct g2d_step *s;

		/* select step and validate it */

		while (1) {

			s = &steps[random() % num_steps];

			if (cur_x + s->x < 0 || cur_y + s->y < 0 ||

				cur_x + img_w + s->x >= screen_width ||

				cur_y + img_h + s->y >= screen_height)

				continue;

			else

				break;

		}

		ret = g2d_move(ctx, &img, cur_x, cur_y, cur_x + s->x, cur_y + s->y,

			img_w, img_h);

		if (!ret)

			ret = g2d_exec(ctx);

		if (ret < 0)

			goto fail;

		cur_x += s->x;

		cur_y += s->y;

		usleep(100000);

	}

fail:

	g2d_fini(ctx);

	free(checkerboard);

	return ret;

}

static int g2d_copy_with_scale_test(struct exynos_device *dev,

					struct exynos_bo *src,

					struct exynos_bo *dst,

					enum e_g2d_buf_type type)

{

	struct g2d_context *ctx;

	struct g2d_image src_img = {0}, dst_img = {0};

	unsigned int src_x, src_y, img_w, img_h;

	unsigned long userptr, size;

	int ret;

	ctx = g2d_init(dev->fd);

	if (!ctx)

		return -EFAULT;

	dst_img.bo[0] = dst->handle;

	src_x = 0;

	src_y = 0;

	img_w = screen_width;

	img_h = screen_height;

	switch (type) {

	case G2D_IMGBUF_GEM:

		src_img.bo[0] = src->handle;

		break;

	case G2D_IMGBUF_USERPTR:

		size = img_w * img_h * 4;

		userptr = (unsigned long)malloc(size);

		if (!userptr) {

			fprintf(stderr, "failed to allocate userptr.\n");

			ret = -EFAULT;

			goto fail;

		}

		src_img.user_ptr[0].userptr = userptr;

		src_img.user_ptr[0].size = size;

		break;

	case G2D_IMGBUF_COLOR:

	default:

		ret = -EFAULT;

		goto fail;

	}

	printf("copy and scale test with %s.\n",

			type == G2D_IMGBUF_GEM ? "gem" : "userptr");

	src_img.width = img_w;

	src_img.height = img_h;

	src_img.stride = src_img.width * 4;

	src_img.buf_type = type;

	src_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	src_img.color = 0xffffffff;

	ret = g2d_solid_fill(ctx, &src_img, src_x, src_y, img_w ,  img_h);

	if (ret < 0)

		goto err_free_userptr;

	src_img.color = 0xff00ff00;

	ret = g2d_solid_fill(ctx, &src_img, 5, 5, 100, 100);

	if (ret < 0)

		goto err_free_userptr;

	dst_img.width = img_w;

	dst_img.height = img_h;

	dst_img.buf_type = G2D_IMGBUF_GEM;

	dst_img.stride = dst_img.width * 4;

	dst_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	ret = g2d_copy_with_scale(ctx, &src_img, &dst_img, 5, 5, 100, 100,

					100, 100, 200, 200, 0);

	if (ret < 0)

		goto err_free_userptr;

	g2d_exec(ctx);

err_free_userptr:

	if (type == G2D_IMGBUF_USERPTR)

		if (userptr)

			free((void *)userptr);

fail:

	g2d_fini(ctx);

	return ret;

}

#ifdef EXYNOS_G2D_USERPTR_TEST

static int g2d_blend_test(struct exynos_device *dev,

					struct exynos_bo *src,

					struct exynos_bo *dst,

					enum e_g2d_buf_type type)

{

	struct g2d_context *ctx;

	struct g2d_image src_img = {0}, dst_img = {0};

	unsigned int src_x, src_y, dst_x, dst_y, img_w, img_h;

	unsigned long userptr, size;

	int ret;

	ctx = g2d_init(dev->fd);

	if (!ctx)

		return -EFAULT;

	dst_img.bo[0] = dst->handle;

	src_x = 0;

	src_y = 0;

	dst_x = 0;

	dst_y = 0;

	img_w = screen_width;

	img_h = screen_height;

	switch (type) {

	case G2D_IMGBUF_GEM:

		src_img.bo[0] = src->handle;

		break;

	case G2D_IMGBUF_USERPTR:

		size = img_w * img_h * 4;

		userptr = (unsigned long)malloc(size);

		if (!userptr) {

			fprintf(stderr, "failed to allocate userptr.\n");

			ret = -EFAULT;

			goto fail;

		}

		src_img.user_ptr[0].userptr = userptr;

		src_img.user_ptr[0].size = size;

		break;

	case G2D_IMGBUF_COLOR:

	default:

		ret = -EFAULT;

		goto fail;

	}

	printf("blend test with %s.\n",

			type == G2D_IMGBUF_GEM ? "gem" : "userptr");

	src_img.width = img_w;

	src_img.height = img_h;

	src_img.stride = src_img.width * 4;

	src_img.buf_type = type;

	src_img.select_mode = G2D_SELECT_MODE_NORMAL;

	src_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	src_img.color = 0xffffffff;

	ret = g2d_solid_fill(ctx, &src_img, src_x, src_y, img_w, img_h);

	if (ret < 0)

		goto err_free_userptr;

	src_img.color = 0x770000ff;

	ret = g2d_solid_fill(ctx, &src_img, 5, 5, 200, 200);

	if (ret < 0)

		goto err_free_userptr;

	dst_img.width = img_w;

	dst_img.height = img_h;

	dst_img.stride = dst_img.width * 4;

	dst_img.buf_type = G2D_IMGBUF_GEM;

	dst_img.select_mode = G2D_SELECT_MODE_NORMAL;

	dst_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	dst_img.color = 0xffffffff;

	ret = g2d_solid_fill(ctx, &dst_img, dst_x, dst_y, img_w, img_h);

	if (ret < 0)

		goto err_free_userptr;

	dst_img.color = 0x77ff0000;

	ret = g2d_solid_fill(ctx, &dst_img, 105, 105, 200, 200);

	if (ret < 0)

		goto err_free_userptr;

	ret = g2d_blend(ctx, &src_img, &dst_img, 5, 5, 105, 105, 200, 200,

			G2D_OP_OVER);

	if (ret < 0)

		goto err_free_userptr;

	g2d_exec(ctx);

err_free_userptr:

	if (type == G2D_IMGBUF_USERPTR)

		if (userptr)

			free((void *)userptr);

fail:

	g2d_fini(ctx);

	return ret;

}

#endif

static int g2d_checkerboard_test(struct exynos_device *dev,

					struct exynos_bo *src,

					struct exynos_bo *dst,

					enum e_g2d_buf_type type)

{

	struct g2d_context *ctx;

	struct g2d_image src_img = {0}, dst_img = {0};

	unsigned int src_x, src_y, dst_x, dst_y, img_w, img_h;

	void *checkerboard = NULL;

	int ret;

	ctx = g2d_init(dev->fd);

	if (!ctx)

		return -EFAULT;

	dst_img.bo[0] = dst->handle;

	src_x = 0;

	src_y = 0;

	dst_x = 0;

	dst_y = 0;

	checkerboard = create_checkerboard_pattern(screen_width / 32, screen_height / 32, 32);

	if (!checkerboard) {

		ret = -EFAULT;

		goto fail;

	}

	img_w = screen_width - (screen_width % 32);

	img_h = screen_height - (screen_height % 32);

	switch (type) {

	case G2D_IMGBUF_GEM:

		memcpy(src->vaddr, checkerboard, img_w * img_h * 4);

		src_img.bo[0] = src->handle;

		break;

	case G2D_IMGBUF_USERPTR:

		src_img.user_ptr[0].userptr = (unsigned long)checkerboard;

		src_img.user_ptr[0].size = img_w * img_h * 4;

		break;

	case G2D_IMGBUF_COLOR:

	default:

		ret = -EFAULT;

		goto fail;

	}

	printf("checkerboard test with %s.\n",

			type == G2D_IMGBUF_GEM ? "gem" : "userptr");

	src_img.width = img_w;

	src_img.height = img_h;

	src_img.stride = src_img.width * 4;

	src_img.buf_type = type;

	src_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	dst_img.width = screen_width;

	dst_img.height = screen_height;

	dst_img.stride = dst_img.width * 4;

	dst_img.buf_type = G2D_IMGBUF_GEM;

	dst_img.color_mode = G2D_COLOR_FMT_ARGB8888 | G2D_ORDER_AXRGB;

	src_img.color = 0xff000000;

	ret = g2d_solid_fill(ctx, &dst_img, src_x, src_y, screen_width, screen_height);

	if (ret < 0)

		goto fail;

	ret = g2d_copy(ctx, &src_img, &dst_img, src_x, src_y, dst_x, dst_y,

			img_w, img_h);

	if (ret < 0)

		goto fail;

	g2d_exec(ctx);

fail:

	free(checkerboard);

	g2d_fini(ctx);

	return ret;

}

static void usage(char *name)

{

	fprintf(stderr, "usage: %s [-s]\n", name);

	fprintf(stderr, "-s <connector_id>@<crtc_id>:<mode>\n");

	exit(0);

}

extern char *optarg;

static const char optstr[] = "s:";

int main(int argc, char **argv)

{

	struct exynos_device *dev;

	struct exynos_bo *bo, *src;

	struct connector con;

	unsigned int fb_id;

	uint32_t handles[4] = {0}, pitches[4] = {0}, offsets[4] = {0};

	drmModeRes *resources;

	int ret, fd, c;

	memset(&con, 0, sizeof(struct connector));

	if (argc != 3) {

		usage(argv[0]);

		return -EINVAL;

	}

	while ((c = getopt(argc, argv, optstr)) != -1) {

		switch (c) {

		case 's':

			con.crtc = -1;

			if (sscanf(optarg, "%d:0x%64s",

						&con.id,

						con.mode_str) != 2 &&

					sscanf(optarg, "%d@%d:%64s",

						&con.id,

						&con.crtc,

						con.mode_str) != 3)

				usage(argv[0]);

			break;

		default:

			usage(argv[0]);

			break;

		}

	}

	fd = drmOpen(DRM_MODULE_NAME, NULL);

	if (fd < 0) {

		fprintf(stderr, "failed to open.\n");

		return fd;

	}

	dev = exynos_device_create(fd);

	if (!dev) {

		ret = -EFAULT;

		goto err_drm_close;

	}

	resources = drmModeGetResources(dev->fd);

	if (!resources) {

		fprintf(stderr, "drmModeGetResources failed: %s\n",

				strerror(errno));

		ret = -EFAULT;

		goto err_dev_destory;

	}

	connector_find_mode(dev->fd, &con, resources);

	drmModeFreeResources(resources);

	if (!con.mode) {

		fprintf(stderr, "failed to find usable connector\n");

		ret = -EFAULT;

		goto err_dev_destory;

	}

	screen_width = con.mode->hdisplay;

	screen_height = con.mode->vdisplay;

	if (screen_width == 0 || screen_height == 0) {

		fprintf(stderr, "failed to find sane resolution on connector\n");

		ret = -EFAULT;

		goto err_dev_destory;

	}

	printf("screen width = %d, screen height = %d\n", screen_width,

			screen_height);

	bo = exynos_create_buffer(dev, screen_width * screen_height * 4, 0);

	if (!bo) {

		ret = -EFAULT;

		goto err_dev_destory;

	}

	handles[0] = bo->handle;

	pitches[0] = screen_width * 4;

	offsets[0] = 0;

	ret = drmModeAddFB2(dev->fd, screen_width, screen_height,

				DRM_FORMAT_XRGB8888, handles,

				pitches, offsets, &fb_id, 0);

	if (ret < 0)

		goto err_destroy_buffer;

	memset(bo->vaddr, 0xff, screen_width * screen_height * 4);

	ret = drm_set_crtc(dev, &con, fb_id);

	if (ret < 0)

		goto err_rm_fb;

	ret = g2d_solid_fill_test(dev, bo);

	if (ret < 0) {

		fprintf(stderr, "failed to solid fill operation.\n");

		goto err_rm_fb;

	}

	wait_for_user_input(0);

	src = exynos_create_buffer(dev, screen_width * screen_height * 4, 0);

	if (!src) {

		ret = -EFAULT;

		goto err_rm_fb;

	}

	ret = g2d_copy_test(dev, src, bo, G2D_IMGBUF_GEM);

	if (ret < 0) {

		fprintf(stderr, "failed to test copy operation.\n");

		goto err_free_src;

	}

	wait_for_user_input(0);

	ret = g2d_move_test(dev, src, bo, G2D_IMGBUF_GEM);

	if (ret < 0) {

		fprintf(stderr, "failed to test move operation.\n");

		goto err_free_src;

	}

	wait_for_user_input(0);

	ret = g2d_copy_with_scale_test(dev, src, bo, G2D_IMGBUF_GEM);

	if (ret < 0) {

		fprintf(stderr, "failed to test copy and scale operation.\n");

		goto err_free_src;

	}

	wait_for_user_input(0);

	ret = g2d_checkerboard_test(dev, src, bo, G2D_IMGBUF_GEM);

	if (ret < 0) {

		fprintf(stderr, "failed to issue checkerboard test.\n");

		goto err_free_src;

	}

	wait_for_user_input(1);

	/*

	 * The blend test uses the userptr functionality of exynos-drm, which

	 * is currently not safe to use. If the kernel hasn't been build with

	 * exynos-iommu support, then the blend test is going to produce (kernel)

	 * memory corruption, eventually leading to a system crash.

	 *

	 * Disable the test for now, until the kernel code has been sanitized.

	 */

#ifdef EXYNOS_G2D_USERPTR_TEST

	ret  = g2d_blend_test(dev, src, bo, G2D_IMGBUF_USERPTR);