/*
 * Copyright © 2016 Intel Corporation
 *
 * 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
 * THE AUTHORS OR COPYRIGHT HOLDERS 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 "igt.h"
#include "drmtest.h"
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

IGT_TEST_DESCRIPTION("Test atomic mode setting with a plane by switching between high and low resolutions");

#define SDR_PLANE_BASE 3
#define SIZE 64

typedef struct {
	int drm_fd;
	igt_display_t display;
	uint32_t devid;
	igt_output_t *output;
	enum pipe pipe;
	struct igt_fb fb_primary;
	struct igt_fb fb_plane[2];
	struct {
		struct igt_fb fb;
		igt_crc_t crc;
	} ref_lowres;
	struct {
		struct igt_fb fb;
		igt_crc_t crc;
	} ref_hires;
	int x, y;
	igt_pipe_crc_t *pipe_crc;
} data_t;

static drmModeModeInfo
get_lowres_mode(int drmfd, igt_output_t *output,
		const drmModeModeInfo *mode_default)
{
	const drmModeModeInfo *mode;
	const drmModeModeInfo *min;
	int j;

        /* search for lowest mode */
        min = mode_default;
	for (j = 0; j < output->config.connector->count_modes; j++) {
		mode = &output->config.connector->modes[j];
		if (mode->vdisplay < min->vdisplay)
			min = mode;
	}

	igt_require_f(mode_default->vdisplay - min->vdisplay > 2 * SIZE,
		      "Current mode for output %s not tall enough; "
		      "plane would still be onscreen after switching to lowest mode.\n", output->name);

	return *min;
}

static igt_plane_t *first_sdr_plane(igt_output_t *output, uint32_t devid)
{
        int index;

        index = intel_display_ver(devid) <= 9 ? 0 : SDR_PLANE_BASE;

        return igt_output_get_plane(output, index);
}

static bool is_sdr_plane(const igt_plane_t *plane, uint32_t devid)
{
        if (intel_display_ver(devid) <= 9)
                return true;

        return plane->index >= SDR_PLANE_BASE;
}
/*
 * Mixing SDR and HDR planes results in a CRC mismatch, so use the first
 * SDR/HDR plane as the main plane matching the SDR/HDR type of the sprite
 * plane under test.
 */
static igt_plane_t *compatible_main_plane(igt_plane_t *plane,
					  igt_output_t *output,
					  uint32_t devid)
{
        if (is_sdr_plane(plane, devid))
                return first_sdr_plane(output, devid);

        return igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
}

static bool setup_plane(data_t *data, igt_plane_t *plane)
{
	struct igt_fb *fb;

	if (plane->type == DRM_PLANE_TYPE_PRIMARY ||
	    plane == first_sdr_plane(data->output, data->devid) ||
		plane->type == DRM_PLANE_TYPE_CURSOR)
		return false;

	fb = &data->fb_plane[0];
	if (!igt_plane_has_format_mod(plane, fb->drm_format, fb->modifier))
		fb = &data->fb_plane[1];
	if (!igt_plane_has_format_mod(plane, fb->drm_format, fb->modifier))
		return false;

	igt_plane_set_position(plane, data->x, data->y);
	igt_plane_set_fb(plane, fb);

	return true;
}

static void blit(data_t *data, cairo_t *cr,
		 struct igt_fb *src, int x, int y)
{
	cairo_surface_t *surface;

	surface = igt_get_cairo_surface(data->drm_fd, src);

	cairo_set_source_surface(cr, surface, x, y);
	cairo_rectangle(cr, x, y, src->width, src->height);
	cairo_fill (cr);

	cairo_surface_destroy(surface);
}

static void create_ref_fb(data_t *data, uint64_t modifier,
			  const drmModeModeInfo *mode, struct igt_fb *fb)
{
	cairo_t *cr;

	igt_create_fb(data->drm_fd, mode->hdisplay, mode->vdisplay,
		      DRM_FORMAT_XRGB8888, modifier, fb);

	cr = igt_get_cairo_ctx(data->drm_fd, fb);
	blit(data, cr, &data->fb_primary, 0, 0);
	blit(data, cr, &data->fb_plane[0], data->x, data->y);
	igt_put_cairo_ctx(cr);
}

static unsigned
test_planes_on_pipe_with_output(data_t *data, igt_plane_t *plane, uint64_t modifier)
{
	const drmModeModeInfo *mode;
	drmModeModeInfo mode_lowres;
	unsigned tested = 0;
	igt_plane_t *primary;
	igt_crc_t crc_lowres, crc_hires1, crc_hires2;

	primary = compatible_main_plane(plane, data->output, data->devid);
	mode = igt_output_get_mode(data->output);
	mode_lowres = get_lowres_mode(data->drm_fd, data->output, mode);

	igt_create_color_pattern_fb(data->drm_fd, mode->hdisplay, mode->vdisplay,
				    DRM_FORMAT_XRGB8888, modifier, 0.0, 0.0, 1.0,
				    &data->fb_primary);

	data->x = 0;
	data->y = mode->vdisplay - SIZE;

	/* for other planes */
	igt_create_color_pattern_fb(data->drm_fd, SIZE, SIZE,
				    DRM_FORMAT_XRGB8888, modifier,
				    1.0, 1.0, 0.0, &data->fb_plane[0]);
	/* for cursor */
	igt_create_color_pattern_fb(data->drm_fd, SIZE, SIZE,
				    DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_LINEAR,
				    1.0, 1.0, 0.0, &data->fb_plane[1]);

	create_ref_fb(data, modifier, mode, &data->ref_hires.fb);
	create_ref_fb(data, modifier, &mode_lowres, &data->ref_lowres.fb);

	igt_output_override_mode(data->output, &mode_lowres);
	igt_plane_set_fb(primary, &data->ref_lowres.fb);
	igt_display_commit2(&data->display, COMMIT_ATOMIC);
	igt_pipe_crc_collect_crc(data->pipe_crc, &data->ref_lowres.crc);

	igt_output_override_mode(data->output, NULL);
	igt_plane_set_fb(primary, &data->ref_hires.fb);
	igt_display_commit2(&data->display, COMMIT_ATOMIC);
	igt_pipe_crc_collect_crc(data->pipe_crc, &data->ref_hires.crc);

	igt_plane_set_fb(primary, &data->fb_primary);
	igt_display_commit2(&data->display, COMMIT_ATOMIC);

	/* yellow sprite plane in lower left corner */
	if (!setup_plane(data, plane))
		return 0;

	igt_display_commit2(&data->display, COMMIT_ATOMIC);

	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_hires1);

	/* switch to lower resolution */
	igt_output_override_mode(data->output, &mode_lowres);
	igt_display_commit2(&data->display, COMMIT_ATOMIC);

	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_lowres);

	/* switch back to higher resolution */
	igt_output_override_mode(data->output, NULL);
	igt_display_commit2(&data->display, COMMIT_ATOMIC);

	igt_pipe_crc_collect_crc(data->pipe_crc, &crc_hires2);

	igt_assert_crc_equal(&data->ref_hires.crc, &crc_hires1);
	igt_assert_crc_equal(&data->ref_hires.crc, &crc_hires2);
	igt_assert_crc_equal(&data->ref_lowres.crc, &crc_lowres);

	igt_plane_set_fb(plane, NULL);
	tested++;

	igt_plane_set_fb(primary, NULL);

	igt_remove_fb(data->drm_fd, &data->fb_plane[1]);
	igt_remove_fb(data->drm_fd, &data->fb_plane[0]);
	igt_remove_fb(data->drm_fd, &data->fb_primary);
	igt_remove_fb(data->drm_fd, &data->ref_hires.fb);
	igt_remove_fb(data->drm_fd, &data->ref_lowres.fb);

	return tested;
}

static void
test_planes_on_pipe(data_t *data, uint64_t modifier)
{
	igt_plane_t *plane;
	unsigned tested = 0;

	for_each_plane_on_pipe(&data->display, data->pipe, plane)
		tested += test_planes_on_pipe_with_output(data, plane, modifier);

	igt_assert(tested > 0);
}

static void test_cleanup(data_t *data)
{
	igt_pipe_crc_free(data->pipe_crc);

	igt_output_set_pipe(data->output, PIPE_NONE);
	igt_display_commit2(&data->display, COMMIT_ATOMIC);
}

static void run_test(data_t *data, uint64_t modifier)
{
	enum pipe pipe;
	igt_output_t *output;

	igt_skip_on(!igt_display_has_format_mod(&data->display,
						DRM_FORMAT_XRGB8888, modifier));

	for_each_pipe(&data->display, pipe) {
		for_each_valid_output_on_pipe(&data->display, pipe, output) {
			data->pipe = pipe;
			data->output = output;

			igt_display_reset(&data->display);
			igt_output_set_pipe(data->output, data->pipe);

			data->pipe_crc = igt_pipe_crc_new(data->drm_fd, data->pipe,
							  IGT_PIPE_CRC_SOURCE_AUTO);

			igt_dynamic_f("pipe-%s-%s", kmstest_pipe_name(pipe), data->output->name)
				test_planes_on_pipe(data, modifier);

			test_cleanup(data);
		}
	}
}

static const struct {
	const char *name;
	uint64_t modifier;
} subtests[] = {
	{ .name = "tiling-none",
	  .modifier = DRM_FORMAT_MOD_LINEAR,
	},
	{ .name = "tiling-x",
	  .modifier = I915_FORMAT_MOD_X_TILED,
	},
	{ .name = "tiling-y",
	  .modifier = I915_FORMAT_MOD_Y_TILED,
	},
	{ .name = "tiling-yf",
	  .modifier = I915_FORMAT_MOD_Yf_TILED,
	},
	{ .name = "tiling-4",
	  .modifier = I915_FORMAT_MOD_4_TILED,
	},
};

igt_main
{
	data_t data = {};

	igt_fixture {
		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
		data.devid = is_i915_device(data.drm_fd) ?
			intel_get_drm_devid(data.drm_fd) : 0;

		kmstest_set_vt_graphics_mode();

		igt_require_pipe_crc(data.drm_fd);
		igt_display_require(&data.display, data.drm_fd);
		igt_display_require_output(&data.display);
		igt_require(data.display.is_atomic);
	}

	for (int i = 0; i < ARRAY_SIZE(subtests); i++) {
		igt_describe_f("Tests the visibility of the planes when switching between "
			       "high and low resolution with %s\n", subtests[i].name);

		igt_subtest_with_dynamic(subtests[i].name)
			run_test(&data, subtests[i].modifier);
	}

	igt_fixture {
		igt_display_fini(&data.display);
		close(data.drm_fd);
	}
}
