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/*
* 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");
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