kms_plane: Add panning test for primary plane

Get CRCs of a full red and a full blue surface as reference.

Create a big framebuffer that is twice width and twice height as the
current display mode.

Fill the top left quarter with red, bottom right quarter with blue
Check the scanned out image with the CRTC at position (0, 0) of the
framebuffer and it should be the same CRC as the full red fb
Check the scanned out image with the CRTC at position (hdisplay,
vdisplay) and it should be the same CRC as the full blue fb

v2: Fix a few things here and there (Damien)

Cc: Lei Liu <lei.a.liu@intel.com>
Cc: Yi Sun <yi.sun@intel.com>
Signed-off-by: Lei Liu <lei.a.liu@intel.com>
Signed-off-by: Yi Sun <yi.sun@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

1 files changed, 130 insertions, 0 deletions

diff --git a/tests/kms_plane.c b/tests/kms_plane.c
index 45c4a774..7437641b 100644
--- a/tests/kms_plane.c
+++ b/tests/kms_plane.c
@@ -45,7 +45,9 @@ typedef struct {
 	igt_pipe_crc_t *pipe_crc;
 } data_t;
 
+static color_t red   = { 1.0f, 0.0f, 0.0f };
 static color_t green = { 0.0f, 1.0f, 0.0f };
+static color_t blue  = { 0.0f, 0.0f, 1.0f };
 
 /*
  * Common code across all tests, acting on data_t
@@ -211,6 +213,124 @@ test_plane_position(data_t *data, enum pipe pipe, enum igt_plane plane,
 						flags);
 }
 
+/*
+ * Plane panning test.
+ *   - We start by grabbing reference CRCs of a full red and a full blue fb
+ *     being scanned out on the primary plane
+ *   - Then we create a big fb, sized (2 * hdisplay, 2 * vdisplay) and:
+ *      - fill the top left quarter with red
+ *      - fill the bottom right quarter with blue
+ *   - The TEST_PANNING_TOP_LEFT test makes sure that with panning at (0, 0)
+ *     we do get the same CRC than the full red fb.
+ *   - The TEST_PANNING_BOTTOM_RIGHT test makes sure that with panning at
+ *     (vdisplay, hdisplay) we do get the same CRC than the full blue fb.
+ */
+typedef struct {
+	data_t *data;
+	igt_crc_t red_crc, blue_crc;
+} test_panning_t;
+
+static void
+create_fb_for_mode__panning(data_t *data, drmModeModeInfo *mode,
+			    struct igt_fb *fb /* out */)
+{
+	unsigned int fb_id;
+	cairo_t *cr;
+
+	fb_id = igt_create_fb(data->drm_fd,
+			      mode->hdisplay * 2, mode->vdisplay * 2,
+			      DRM_FORMAT_XRGB8888,
+			      false /* tiling */,
+			      fb);
+	igt_assert(fb_id);
+
+	cr = igt_get_cairo_ctx(data->drm_fd, fb);
+
+	igt_paint_color(cr, 0, 0, mode->hdisplay, mode->vdisplay,
+			1.0, 0.0, 0.0);
+
+	igt_paint_color(cr,
+			mode->hdisplay, mode->vdisplay,
+			mode->hdisplay, mode->vdisplay,
+			0.0, 0.0, 1.0);
+
+	igt_assert(cairo_status(cr) == 0);
+	cairo_destroy(cr);
+}
+
+enum {
+	TEST_PANNING_TOP_LEFT	  = 1 << 0,
+	TEST_PANNING_BOTTOM_RIGHT = 1 << 1,
+};
+
+static void
+test_plane_panning_with_output(data_t *data,
+			       enum pipe pipe,
+			       enum igt_plane plane,
+			       igt_output_t *output,
+			       unsigned int flags)
+{
+	test_panning_t test = { .data = data };
+	igt_plane_t *primary;
+	struct igt_fb primary_fb;
+	drmModeModeInfo *mode;
+	igt_crc_t crc;
+
+	fprintf(stdout, "Testing connector %s using pipe %c plane %d\n",
+		igt_output_name(output), pipe_name(pipe), plane);
+
+	test_init(data, pipe);
+
+	test_grab_crc(data, output, &red, &test.red_crc);
+	test_grab_crc(data, output, &blue, &test.blue_crc);
+
+	igt_output_set_pipe(output, pipe);
+
+	mode = igt_output_get_mode(output);
+	primary = igt_output_get_plane(output, 0);
+
+	create_fb_for_mode__panning(data, mode, &primary_fb);
+	igt_plane_set_fb(primary, &primary_fb);
+
+	if (flags & TEST_PANNING_TOP_LEFT)
+		igt_plane_set_panning(primary, 0, 0);
+	else
+		igt_plane_set_panning(primary, mode->hdisplay, mode->vdisplay);
+
+	igt_plane_set_position(primary, 0, 0);
+
+	igt_display_commit(&data->display);
+
+	igt_pipe_crc_collect_crc(data->pipe_crc, &crc);
+
+	if (flags & TEST_PANNING_TOP_LEFT)
+		igt_assert(igt_crc_equal(&test.red_crc, &crc));
+	else
+		igt_assert(igt_crc_equal(&test.blue_crc, &crc));
+
+	igt_plane_set_fb(primary, NULL);
+
+	/* reset states to neutral values, assumed by other tests */
+	igt_output_set_pipe(output, PIPE_ANY);
+	igt_plane_set_panning(primary, 0, 0);
+
+	test_fini(data);
+}
+
+static void
+test_plane_panning(data_t *data, enum pipe pipe, enum igt_plane plane,
+            unsigned int flags)
+{
+	igt_output_t *output;
+
+	igt_skip_on(pipe >= data->display.n_pipes);
+	igt_skip_on(plane >= data->display.pipes[pipe].n_planes);
+
+	for_each_connected_output(&data->display, output)
+		test_plane_panning_with_output(data, pipe, plane, output,
+						flags);
+}
+
 static void
 run_tests_for_pipe_plane(data_t *data, enum pipe pipe, enum igt_plane plane)
 {
@@ -222,6 +342,16 @@ run_tests_for_pipe_plane(data_t *data, enum pipe pipe, enum igt_plane plane)
 	igt_subtest_f("plane-position-hole-pipe-%c-plane-%d",
 		      pipe_name(pipe), plane)
 		test_plane_position(data, pipe, plane, 0);
+
+	igt_subtest_f("plane-panning-top-left-pipe-%c-plane-%d",
+		      pipe_name(pipe), plane)
+		test_plane_panning(data, pipe, plane, TEST_PANNING_TOP_LEFT);
+
+	igt_subtest_f("plane-panning-bottom-right-pipe-%c-plane-%d",
+		      pipe_name(pipe), plane)
+		test_plane_panning(data, pipe, plane,
+				   TEST_PANNING_BOTTOM_RIGHT);
+
 }
 
 static void