[PATCH i-g-t] kms_cursor_crc: Test cursor size change ioctl

[Antti Koskipaa <antti.koskipaa@linux.intel.com>]

Now that we support cursor changes other than 64x64, a bug was found
where the size change was only applied at cursor enable time, rather
than at every update. Add a testcase for that.

Signed-off-by: Antti Koskipaa <antti.koskipaa@linux.intel.com>
---
 tests/kms_cursor_crc.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/tests/kms_cursor_crc.c b/tests/kms_cursor_crc.c
index 06625ee..1b8da26 100644
--- a/tests/kms_cursor_crc.c
+++ b/tests/kms_cursor_crc.c
@@ -54,6 +54,7 @@ typedef struct {
 	int left, right, top, bottom;
 	int screenw, screenh;
 	int curw, curh; /* cursor size */
+	int cursor_max_size;
 	igt_pipe_crc_t *pipe_crc;
 } test_data_t;
 
@@ -272,6 +273,7 @@ static bool prepare_crtc(test_data_t *test_data, igt_output_t *output,
 	test_data->screenh = mode->vdisplay;
 	test_data->curw = cursor_w;
 	test_data->curh = cursor_h;
+	test_data->cursor_max_size = cursor_w;
 
 	/* make sure cursor is disabled */
 	cursor_disable(test_data);
@@ -354,6 +356,56 @@ static void create_cursor_fb(data_t *data, int cur_w, int cur_h)
 	igt_assert(cairo_status(cr) == 0);
 }
 
+static void test_cursor_size(test_data_t *test_data)
+{
+	data_t *data = test_data->data;
+	igt_display_t *display = &data->display;
+	igt_pipe_crc_t *pipe_crc = test_data->pipe_crc;
+	igt_crc_t crc[10], ref_crc;
+	igt_plane_t *cursor;
+	cairo_t *cr;
+	uint32_t fb_id;
+	int i, size, cursor_max_size = test_data->cursor_max_size;
+
+	/* Create a maximum size cursor, then change the size in flight to
+	 * smaller ones to see that the size is applied correctly
+	 */
+	fb_id = igt_create_fb(data->drm_fd, cursor_max_size, cursor_max_size,
+			      DRM_FORMAT_ARGB8888, false, &data->fb);
+	igt_assert(fb_id);
+
+	/* Use a solid white rectangle as the cursor */
+	cr = igt_get_cairo_ctx(data->drm_fd, &data->fb);
+	igt_paint_color_alpha(cr, 0, 0, cursor_max_size, cursor_max_size, 1.0, 1.0, 1.0, 1.0);
+
+	/* Hardware test loop */
+	cursor_enable(test_data);
+	cursor = igt_output_get_plane(test_data->output, IGT_PLANE_CURSOR);
+	igt_plane_set_position(cursor, 0, 0);
+	for (i = 0, size = cursor_max_size; size >= 64; size /= 2, i++) {
+		/* Change size in flight: */
+		int ret = drmModeSetCursor(data->drm_fd, test_data->output->config.crtc->crtc_id,
+					   data->fb.gem_handle, size, size);
+		igt_assert(ret == 0);
+		igt_wait_for_vblank(data->drm_fd, test_data->pipe);
+		igt_pipe_crc_collect_crc(pipe_crc, &crc[i]);
+	}
+	cursor_disable(test_data);
+	/* Software test loop */
+	cr = igt_get_cairo_ctx(data->drm_fd, &data->primary_fb);
+	for (i = 0, size = cursor_max_size; size >= 64; size /= 2, i++) {
+		/* Now render the same in software and collect crc */
+		igt_paint_color_alpha(cr, 0, 0, size, size, 1.0, 1.0, 1.0, 1.0);
+		igt_display_commit(display);
+		igt_wait_for_vblank(data->drm_fd, test_data->pipe);
+		igt_pipe_crc_collect_crc(pipe_crc, &ref_crc);
+		/* Clear screen afterwards */
+		igt_paint_color(cr, 0, 0, test_data->screenw, test_data->screenh,
+				0.0, 0.0, 0.0);
+		igt_assert(igt_crc_equal(&crc[i], &ref_crc));
+	}
+}
+
 static void run_test_generic(data_t *data, int cursor_max_size)
 {
 	int cursor_size;
@@ -407,6 +459,9 @@ igt_main
 		igt_display_init(&data.display, data.drm_fd);
 	}
 
+	igt_subtest_f("cursor-size-change")
+		run_test(&data, test_cursor_size, cursor_width, cursor_height);
+
 	run_test_generic(&data, cursor_width);
 
 	igt_fixture {
-- 
1.8.3.2