drivers/gpu/drm/selftests/test-drm-helper.c - hafnium/third_party/linux - Git at Google

 /*
  * Test cases for the drm_kms_helper functions
  */

 #define pr_fmt(fmt) "drm_kms_helper: " fmt

 #include <linux/module.h>

 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_modes.h>

 #define TESTS "drm_helper_selftests.h"
 #include "drm_selftest.h"

 #define FAIL(test, msg, ...) \
 	do { \
 		if (test) { \
 			pr_err("%s/%u: " msg, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
 			return -EINVAL; \
 		} \
 	} while (0)

 #define FAIL_ON(x) FAIL((x), "%s", "FAIL_ON(" __stringify(x) ")\n")

 static void set_src(struct drm_plane_state *plane_state,
 		    unsigned src_x, unsigned src_y,
 		    unsigned src_w, unsigned src_h)
 {
 	plane_state->src_x = src_x;
 	plane_state->src_y = src_y;
 	plane_state->src_w = src_w;
 	plane_state->src_h = src_h;
 }

 static bool check_src_eq(struct drm_plane_state *plane_state,
 			 unsigned src_x, unsigned src_y,
 			 unsigned src_w, unsigned src_h)
 {
 	if (plane_state->src.x1 < 0) {
 		pr_err("src x coordinate %x should never be below 0.\n", plane_state->src.x1);
 		drm_rect_debug_print("src: ", &plane_state->src, true);
 		return false;
 	}
 	if (plane_state->src.y1 < 0) {
 		pr_err("src y coordinate %x should never be below 0.\n", plane_state->src.y1);
 		drm_rect_debug_print("src: ", &plane_state->src, true);
 		return false;
 	}

 	if (plane_state->src.x1 != src_x ||
 	    plane_state->src.y1 != src_y ||
 	    drm_rect_width(&plane_state->src) != src_w ||
 	    drm_rect_height(&plane_state->src) != src_h) {
 		drm_rect_debug_print("src: ", &plane_state->src, true);
 		return false;
 	}

 	return true;
 }

 static void set_crtc(struct drm_plane_state *plane_state,
 		     int crtc_x, int crtc_y,
 		     unsigned crtc_w, unsigned crtc_h)
 {
 	plane_state->crtc_x = crtc_x;
 	plane_state->crtc_y = crtc_y;
 	plane_state->crtc_w = crtc_w;
 	plane_state->crtc_h = crtc_h;
 }

 static bool check_crtc_eq(struct drm_plane_state *plane_state,
 			  int crtc_x, int crtc_y,
 			  unsigned crtc_w, unsigned crtc_h)
 {
 	if (plane_state->dst.x1 != crtc_x ||
 	    plane_state->dst.y1 != crtc_y ||
 	    drm_rect_width(&plane_state->dst) != crtc_w ||
 	    drm_rect_height(&plane_state->dst) != crtc_h) {
 		drm_rect_debug_print("dst: ", &plane_state->dst, false);

 		return false;
 	}

 	return true;
 }

 static int igt_check_plane_state(void *ignored)
 {
 	int ret;

 	const struct drm_crtc_state crtc_state = {
 		.crtc = ZERO_SIZE_PTR,
 		.enable = true,
 		.active = true,
 		.mode = {
 			DRM_MODE("1024x768", 0, 65000, 1024, 1048,
 				1184, 1344, 0, 768, 771, 777, 806, 0,
 				DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
 		},
 	};
 	struct drm_framebuffer fb = {
 		.width = 2048,
 		.height = 2048
 	};
 	struct drm_plane_state plane_state = {
 		.crtc = ZERO_SIZE_PTR,
 		.fb = &fb,
 		.rotation = DRM_MODE_ROTATE_0
 	};

 	/* Simple clipping, no scaling. */
 	set_src(&plane_state, 0, 0, fb.width << 16, fb.height << 16);
 	set_crtc(&plane_state, 0, 0, fb.width, fb.height);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, false);
 	FAIL(ret < 0, "Simple clipping check should pass\n");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

 	/* Rotated clipping + reflection, no scaling. */
 	plane_state.rotation = DRM_MODE_ROTATE_90 | DRM_MODE_REFLECT_X;
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, false);
 	FAIL(ret < 0, "Rotated clipping check should pass\n");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 	plane_state.rotation = DRM_MODE_ROTATE_0;

 	/* Check whether positioning works correctly. */
 	set_src(&plane_state, 0, 0, 1023 << 16, 767 << 16);
 	set_crtc(&plane_state, 0, 0, 1023, 767);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, false);
 	FAIL(!ret, "Should not be able to position on the crtc with can_position=false\n");

 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  true, false);
 	FAIL(ret < 0, "Simple positioning should work\n");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1023, 767));

 	/* Simple scaling tests. */
 	set_src(&plane_state, 0, 0, 512 << 16, 384 << 16);
 	set_crtc(&plane_state, 0, 0, 1024, 768);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  0x8001,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, false);
 	FAIL(!ret, "Upscaling out of range should fail.\n");
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  0x8000,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, false);
 	FAIL(ret < 0, "Upscaling exactly 2x should work\n");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

 	set_src(&plane_state, 0, 0, 2048 << 16, 1536 << 16);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  0x1ffff, false, false);
 	FAIL(!ret, "Downscaling out of range should fail.\n");
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  0x20000, false, false);
 	FAIL(ret < 0, "Should succeed with exact scaling limit\n");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

 	/* Testing rounding errors. */
 	set_src(&plane_state, 0, 0, 0x40001, 0x40001);
 	set_crtc(&plane_state, 1022, 766, 4, 4);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  0x10001,
 						  true, false);
 	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));

 	set_src(&plane_state, 0x20001, 0x20001, 0x4040001, 0x3040001);
 	set_crtc(&plane_state, -2, -2, 1028, 772);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  0x10001,
 						  false, false);
 	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

 	set_src(&plane_state, 0, 0, 0x3ffff, 0x3ffff);
 	set_crtc(&plane_state, 1022, 766, 4, 4);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  0xffff,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  true, false);
 	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 	FAIL_ON(!plane_state.visible);
 	/* Should not be rounded to 0x20001, which would be upscaling. */
 	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));

 	set_src(&plane_state, 0x1ffff, 0x1ffff, 0x403ffff, 0x303ffff);
 	set_crtc(&plane_state, -2, -2, 1028, 772);
 	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 						  0xffff,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, false);
 	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 	FAIL_ON(!plane_state.visible);
 	FAIL_ON(!check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16));
 	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

 	return 0;
 }

 #include "drm_selftest.c"

 static int __init test_drm_helper_init(void)
 {
 	int err;

 	err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL);

 	return err > 0 ? 0 : err;
 }

 module_init(test_drm_helper_init);

 MODULE_AUTHOR("Intel Corporation");
 MODULE_LICENSE("GPL");
	/*
	* Test cases for the drm_kms_helper functions
	*/

	#define pr_fmt(fmt) "drm_kms_helper: " fmt

	#include <linux/module.h>

	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_plane_helper.h>
	#include <drm/drm_modes.h>

	#define TESTS "drm_helper_selftests.h"
	#include "drm_selftest.h"

	#define FAIL(test, msg, ...) \
	do { \
	if (test) { \
	pr_err("%s/%u: " msg, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
	return -EINVAL; \
	} \
	} while (0)

	#define FAIL_ON(x) FAIL((x), "%s", "FAIL_ON(" __stringify(x) ")\n")

	static void set_src(struct drm_plane_state *plane_state,
	unsigned src_x, unsigned src_y,
	unsigned src_w, unsigned src_h)
	{
	plane_state->src_x = src_x;
	plane_state->src_y = src_y;
	plane_state->src_w = src_w;
	plane_state->src_h = src_h;
	}

	static bool check_src_eq(struct drm_plane_state *plane_state,
	unsigned src_x, unsigned src_y,
	unsigned src_w, unsigned src_h)
	{
	if (plane_state->src.x1 < 0) {
	pr_err("src x coordinate %x should never be below 0.\n", plane_state->src.x1);
	drm_rect_debug_print("src: ", &plane_state->src, true);
	return false;
	}
	if (plane_state->src.y1 < 0) {
	pr_err("src y coordinate %x should never be below 0.\n", plane_state->src.y1);
	drm_rect_debug_print("src: ", &plane_state->src, true);
	return false;
	}

	if (plane_state->src.x1 != src_x \|\|
	plane_state->src.y1 != src_y \|\|
	drm_rect_width(&plane_state->src) != src_w \|\|
	drm_rect_height(&plane_state->src) != src_h) {
	drm_rect_debug_print("src: ", &plane_state->src, true);
	return false;
	}

	return true;
	}

	static void set_crtc(struct drm_plane_state *plane_state,
	int crtc_x, int crtc_y,
	unsigned crtc_w, unsigned crtc_h)
	{
	plane_state->crtc_x = crtc_x;
	plane_state->crtc_y = crtc_y;
	plane_state->crtc_w = crtc_w;
	plane_state->crtc_h = crtc_h;
	}

	static bool check_crtc_eq(struct drm_plane_state *plane_state,
	int crtc_x, int crtc_y,
	unsigned crtc_w, unsigned crtc_h)
	{
	if (plane_state->dst.x1 != crtc_x \|\|
	plane_state->dst.y1 != crtc_y \|\|
	drm_rect_width(&plane_state->dst) != crtc_w \|\|
	drm_rect_height(&plane_state->dst) != crtc_h) {
	drm_rect_debug_print("dst: ", &plane_state->dst, false);

	return false;
	}

	return true;
	}

	static int igt_check_plane_state(void *ignored)
	{
	int ret;

	const struct drm_crtc_state crtc_state = {
	.crtc = ZERO_SIZE_PTR,
	.enable = true,
	.active = true,
	.mode = {
	DRM_MODE("1024x768", 0, 65000, 1024, 1048,
	1184, 1344, 0, 768, 771, 777, 806, 0,
	DRM_MODE_FLAG_NHSYNC \| DRM_MODE_FLAG_NVSYNC)
	},
	};
	struct drm_framebuffer fb = {
	.width = 2048,
	.height = 2048
	};
	struct drm_plane_state plane_state = {
	.crtc = ZERO_SIZE_PTR,
	.fb = &fb,
	.rotation = DRM_MODE_ROTATE_0
	};

	/* Simple clipping, no scaling. */
	set_src(&plane_state, 0, 0, fb.width << 16, fb.height << 16);
	set_crtc(&plane_state, 0, 0, fb.width, fb.height);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	DRM_PLANE_HELPER_NO_SCALING,
	false, false);
	FAIL(ret < 0, "Simple clipping check should pass\n");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

	/* Rotated clipping + reflection, no scaling. */
	plane_state.rotation = DRM_MODE_ROTATE_90 \| DRM_MODE_REFLECT_X;
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	DRM_PLANE_HELPER_NO_SCALING,
	false, false);
	FAIL(ret < 0, "Rotated clipping check should pass\n");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
	plane_state.rotation = DRM_MODE_ROTATE_0;

	/* Check whether positioning works correctly. */
	set_src(&plane_state, 0, 0, 1023 << 16, 767 << 16);
	set_crtc(&plane_state, 0, 0, 1023, 767);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	DRM_PLANE_HELPER_NO_SCALING,
	false, false);
	FAIL(!ret, "Should not be able to position on the crtc with can_position=false\n");

	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	DRM_PLANE_HELPER_NO_SCALING,
	true, false);
	FAIL(ret < 0, "Simple positioning should work\n");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1023, 767));

	/* Simple scaling tests. */
	set_src(&plane_state, 0, 0, 512 << 16, 384 << 16);
	set_crtc(&plane_state, 0, 0, 1024, 768);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	0x8001,
	DRM_PLANE_HELPER_NO_SCALING,
	false, false);
	FAIL(!ret, "Upscaling out of range should fail.\n");
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	0x8000,
	DRM_PLANE_HELPER_NO_SCALING,
	false, false);
	FAIL(ret < 0, "Upscaling exactly 2x should work\n");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

	set_src(&plane_state, 0, 0, 2048 << 16, 1536 << 16);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	0x1ffff, false, false);
	FAIL(!ret, "Downscaling out of range should fail.\n");
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	0x20000, false, false);
	FAIL(ret < 0, "Should succeed with exact scaling limit\n");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

	/* Testing rounding errors. */
	set_src(&plane_state, 0, 0, 0x40001, 0x40001);
	set_crtc(&plane_state, 1022, 766, 4, 4);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	0x10001,
	true, false);
	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));

	set_src(&plane_state, 0x20001, 0x20001, 0x4040001, 0x3040001);
	set_crtc(&plane_state, -2, -2, 1028, 772);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	DRM_PLANE_HELPER_NO_SCALING,
	0x10001,
	false, false);
	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

	set_src(&plane_state, 0, 0, 0x3ffff, 0x3ffff);
	set_crtc(&plane_state, 1022, 766, 4, 4);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	0xffff,
	DRM_PLANE_HELPER_NO_SCALING,
	true, false);
	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
	FAIL_ON(!plane_state.visible);
	/* Should not be rounded to 0x20001, which would be upscaling. */
	FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));

	set_src(&plane_state, 0x1ffff, 0x1ffff, 0x403ffff, 0x303ffff);
	set_crtc(&plane_state, -2, -2, 1028, 772);
	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
	0xffff,
	DRM_PLANE_HELPER_NO_SCALING,
	false, false);
	FAIL(ret < 0, "Should succeed by clipping to exact multiple");
	FAIL_ON(!plane_state.visible);
	FAIL_ON(!check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16));
	FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));

	return 0;
	}

	#include "drm_selftest.c"

	static int __init test_drm_helper_init(void)
	{
	int err;

	err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL);

	return err > 0 ? 0 : err;
	}

	module_init(test_drm_helper_init);

	MODULE_AUTHOR("Intel Corporation");
	MODULE_LICENSE("GPL");