// SPDX-License-Identifier: GPL-2.0 /* * Test cases for the drm_plane_helper functions * * Copyright (c) 2022 Maíra Canal */ #include #include #include #include static void set_src(struct drm_plane_state *plane_state, unsigned int src_x, unsigned int src_y, unsigned int src_w, unsigned int 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 int src_x, unsigned int src_y, unsigned int src_w, unsigned int 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 int crtc_w, unsigned int 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 int crtc_w, unsigned int 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 void drm_test_check_plane_state(struct kunit *test) { int ret; static 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) }, }; static struct drm_plane plane = { .dev = NULL }; static struct drm_framebuffer fb = { .width = 2048, .height = 2048 }; static struct drm_plane_state plane_state = { .plane = &plane, .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_NO_SCALING, DRM_PLANE_NO_SCALING, false, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Simple clipping check should pass\n"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, DRM_PLANE_NO_SCALING, false, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Rotated clipping check should pass\n"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, DRM_PLANE_NO_SCALING, false, false); KUNIT_EXPECT_TRUE_MSG(test, 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_NO_SCALING, DRM_PLANE_NO_SCALING, true, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Simple positioning should work\n"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, false, false); KUNIT_EXPECT_TRUE_MSG(test, ret, "Upscaling out of range should fail.\n"); ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state, 0x8000, DRM_PLANE_NO_SCALING, false, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Upscaling exactly 2x should work\n"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, 0x1ffff, false, false); KUNIT_EXPECT_TRUE_MSG(test, ret, "Downscaling out of range should fail.\n"); ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state, DRM_PLANE_NO_SCALING, 0x20000, false, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Should succeed with exact scaling limit\n"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, 0x10001, true, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Should succeed by clipping to exact multiple"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, 0x10001, false, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Should succeed by clipping to exact multiple"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, true, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Should succeed by clipping to exact multiple"); KUNIT_EXPECT_TRUE(test, plane_state.visible); /* Should not be rounded to 0x20001, which would be upscaling. */ KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16)); KUNIT_EXPECT_TRUE(test, 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_NO_SCALING, false, false); KUNIT_EXPECT_FALSE_MSG(test, ret, 0, "Should succeed by clipping to exact multiple"); KUNIT_EXPECT_TRUE(test, plane_state.visible); KUNIT_EXPECT_TRUE(test, check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16)); KUNIT_EXPECT_TRUE(test, check_crtc_eq(&plane_state, 0, 0, 1024, 768)); } static struct kunit_case drm_plane_helper_test[] = { KUNIT_CASE(drm_test_check_plane_state), {} }; static struct kunit_suite drm_plane_helper_test_suite = { .name = "drm_plane_helper", .test_cases = drm_plane_helper_test, }; kunit_test_suite(drm_plane_helper_test_suite); MODULE_LICENSE("GPL");