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Diffstat (limited to 'drivers/gpu/drm/tests/drm_plane_helper_test.c')
-rw-r--r--drivers/gpu/drm/tests/drm_plane_helper_test.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tests/drm_plane_helper_test.c b/drivers/gpu/drm/tests/drm_plane_helper_test.c
new file mode 100644
index 000000000..ec71af791
--- /dev/null
+++ b/drivers/gpu/drm/tests/drm_plane_helper_test.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Test cases for the drm_plane_helper functions
+ *
+ * Copyright (c) 2022 MaĆ­ra Canal <mairacanal@riseup.net>
+ */
+
+#include <kunit/test.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_modes.h>
+
+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");