[igt-dev] [PATCH i-g-t v2 1/2] tests/kms_cursor_crc: Probe kernel for cursor size support

[Lyude <lyude@redhat.com>]

From: Lyude Paul <lyude@redhat.com>

Currently we just assume that every cursor size up to data->cursor_max_w/h will
be supported by the driver, and check for support of nonsquare cursors by
checking if we're running on u815 and if so, which variant of intel hardware
we're running on. This isn't really ideal as we're about to enable 32x32 cursor
size tests for nouveau, and Intel hardware doesn't support cursor sizes that
small.

So, fix this by removing has_nonsquare_cursors() and replacing it with a more
generic require_cursor_size() function which checks whether or not the driver
we're using supports a given cursor size by attempting a test-only atomic
commit.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Martin Peres <martin.peres@free.fr>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Jeremy Cline <jcline@redhat.com>
---
 tests/kms_cursor_crc.c | 131 ++++++++++++++++++++++++-----------------
 1 file changed, 76 insertions(+), 55 deletions(-)

diff --git a/tests/kms_cursor_crc.c b/tests/kms_cursor_crc.c
index 3541ea06..b9c05472 100644
--- a/tests/kms_cursor_crc.c
+++ b/tests/kms_cursor_crc.c
@@ -523,26 +523,43 @@ static void create_cursor_fb(data_t *data, int cur_w, int cur_h)
 	igt_put_cairo_ctx(cr);
 }
 
-static bool has_nonsquare_cursors(data_t *data)
+static void require_cursor_size(data_t *data, int w, int h)
 {
-	uint32_t devid;
+	igt_fb_t primary_fb;
+	drmModeModeInfo *mode;
+	igt_display_t *display = &data->display;
+	igt_output_t *output = data->output;
+	igt_plane_t *primary, *cursor;
+	int ret;
 
-	if (!is_i915_device(data->drm_fd))
-		return false;
+	igt_output_set_pipe(output, data->pipe);
 
-	devid = intel_get_drm_devid(data->drm_fd);
+	mode = igt_output_get_mode(output);
+	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+	cursor = igt_output_get_plane_type(output, DRM_PLANE_TYPE_CURSOR);
 
-	/*
-	 * Test non-square cursors a bit on the platforms
-	 * that support such things.
-	 */
-	if (devid == PCI_CHIP_845_G || devid == PCI_CHIP_I865_G)
-		return true;
+	/* Create temporary primary fb for testing */
+	igt_assert(igt_create_fb(data->drm_fd, mode->hdisplay, mode->vdisplay, DRM_FORMAT_XRGB8888,
+				 LOCAL_DRM_FORMAT_MOD_NONE, &primary_fb));
 
-	if (IS_VALLEYVIEW(devid) || IS_CHERRYVIEW(devid))
-		return false;
+	igt_plane_set_fb(primary, &primary_fb);
+	igt_plane_set_fb(cursor, &data->fb);
+	igt_plane_set_size(cursor, w, h);
+	igt_fb_set_size(&data->fb, cursor, w, h);
+
+	/* Test if the kernel supports the given cursor size or not */
+	ret = igt_display_try_commit_atomic(display,
+					    DRM_MODE_ATOMIC_TEST_ONLY |
+					    DRM_MODE_ATOMIC_ALLOW_MODESET,
+					    NULL);
+
+	igt_plane_set_fb(primary, NULL);
+	igt_plane_set_fb(cursor, NULL);
+
+	igt_remove_fb(data->drm_fd, &primary_fb);
+	igt_output_set_pipe(output, PIPE_NONE);
 
-	return intel_gen(devid) >= 7;
+	igt_skip_on_f(ret, "Cursor size %dx%d not supported by driver\n", w, h);
 }
 
 static void test_cursor_size(data_t *data)
@@ -697,27 +714,33 @@ static void run_tests_on_pipe(data_t *data, enum pipe pipe)
 			create_cursor_fb(data, w, h);
 		}
 
-		/* Using created cursor FBs to test cursor support */
-		igt_describe("Check if a given-size cursor is well-positioned inside the screen.");
-		igt_subtest_f("pipe-%s-cursor-%dx%d-onscreen", kmstest_pipe_name(pipe), w, h)
-			run_test(data, test_crc_onscreen, w, h);
-
-		igt_describe("Check if a given-size cursor is well-positioned outside the screen.");
-		igt_subtest_f("pipe-%s-cursor-%dx%d-offscreen", kmstest_pipe_name(pipe), w, h)
-			run_test(data, test_crc_offscreen, w, h);
-
-		igt_describe("Check the smooth and pixel-by-pixel given-size cursor movements on"
-		             "horizontal, vertical and diagonal.");
-		igt_subtest_f("pipe-%s-cursor-%dx%d-sliding", kmstest_pipe_name(pipe), w, h)
-			run_test(data, test_crc_sliding, w, h);
-
-		igt_describe("Check random placement of a cursor with given size.");
-		igt_subtest_f("pipe-%s-cursor-%dx%d-random", kmstest_pipe_name(pipe), w, h)
-			run_test(data, test_crc_random, w, h);
-
-		igt_describe("Check the rapid update of given-size cursor movements.");
-		igt_subtest_f("pipe-%s-cursor-%dx%d-rapid-movement", kmstest_pipe_name(pipe), w, h) {
-			run_test(data, test_rapid_movement, w, h);
+		igt_subtest_group {
+			igt_fixture
+				require_cursor_size(data, w, h);
+
+			/* Using created cursor FBs to test cursor support */
+			igt_describe("Check if a given-size cursor is well-positioned inside the "
+				     "screen.");
+			igt_subtest_f("pipe-%s-cursor-%dx%d-onscreen", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_onscreen, w, h);
+
+			igt_describe("Check if a given-size cursor is well-positioned outside the "
+				     "screen.");
+			igt_subtest_f("pipe-%s-cursor-%dx%d-offscreen", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_offscreen, w, h);
+
+			igt_describe("Check the smooth and pixel-by-pixel given-size cursor "
+				     "movements on horizontal, vertical and diagonal.");
+			igt_subtest_f("pipe-%s-cursor-%dx%d-sliding", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_sliding, w, h);
+
+			igt_describe("Check random placement of a cursor with given size.");
+			igt_subtest_f("pipe-%s-cursor-%dx%d-random", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_random, w, h);
+
+			igt_describe("Check the rapid update of given-size cursor movements.");
+			igt_subtest_f("pipe-%s-cursor-%dx%d-rapid-movement", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_rapid_movement, w, h);
 		}
 
 		igt_fixture
@@ -730,27 +753,25 @@ static void run_tests_on_pipe(data_t *data, enum pipe pipe)
 		 */
 		h /= 3;
 
-		igt_fixture {
-			if (has_nonsquare_cursors(data))
-				create_cursor_fb(data, w, h);
-		}
+		igt_fixture
+			create_cursor_fb(data, w, h);
 
-		/* Using created cursor FBs to test cursor support */
-		igt_subtest_f("pipe-%s-cursor-%dx%d-onscreen", kmstest_pipe_name(pipe), w, h) {
-			igt_require(has_nonsquare_cursors(data));
-			run_test(data, test_crc_onscreen, w, h);
-		}
-		igt_subtest_f("pipe-%s-cursor-%dx%d-offscreen", kmstest_pipe_name(pipe), w, h) {
-			igt_require(has_nonsquare_cursors(data));
-			run_test(data, test_crc_offscreen, w, h);
-		}
-		igt_subtest_f("pipe-%s-cursor-%dx%d-sliding", kmstest_pipe_name(pipe), w, h) {
-			igt_require(has_nonsquare_cursors(data));
-			run_test(data, test_crc_sliding, w, h);
-		}
-		igt_subtest_f("pipe-%s-cursor-%dx%d-random", kmstest_pipe_name(pipe), w, h) {
-			igt_require(has_nonsquare_cursors(data));
-			run_test(data, test_crc_random, w, h);
+		igt_subtest_group {
+			igt_fixture
+				require_cursor_size(data, w, h);
+
+			/* Using created cursor FBs to test cursor support */
+			igt_subtest_f("pipe-%s-cursor-%dx%d-onscreen", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_onscreen, w, h);
+
+			igt_subtest_f("pipe-%s-cursor-%dx%d-offscreen", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_offscreen, w, h);
+
+			igt_subtest_f("pipe-%s-cursor-%dx%d-sliding", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_sliding, w, h);
+
+			igt_subtest_f("pipe-%s-cursor-%dx%d-random", kmstest_pipe_name(pipe), w, h)
+				run_test(data, test_crc_random, w, h);
 		}
 
 		igt_fixture
-- 
2.29.2

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