[igt-dev] [v3 4/9] tests/kms_plane_scaling: Downscaling each plane

[Swati Sharma]

Subtest for testing downscaling for each plane
individually (checked 1 plane per "class" like
we do in other tests).

Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
---
 tests/kms_plane_scaling.c | 77 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/tests/kms_plane_scaling.c b/tests/kms_plane_scaling.c
index 25e91659..22563fac 100644
--- a/tests/kms_plane_scaling.c
+++ b/tests/kms_plane_scaling.c
@@ -288,6 +288,76 @@ test_plane_upscaling(data_t *d, enum pipe pipe, igt_output_t *output)
 	}
 }
 
+static void
+__test_plane_downscaling(data_t *d, igt_plane_t *plane,
+		         enum pipe pipe, igt_output_t *output)
+{
+	igt_display_t *display = &d->display;
+	int width, height;
+	drmModeModeInfo *mode;
+	bool test_complete = false;
+	int scaling = 50;
+	int ret;
+
+	cleanup_crtc(d);
+
+	igt_output_set_pipe(output, pipe);
+	mode = igt_output_get_mode(output);
+	width = mode->hdisplay;
+	height = mode->vdisplay;
+
+	while(!test_complete) {
+
+		igt_create_color_pattern_fb(display->drm_fd,
+					    width, height,
+					    DRM_FORMAT_XRGB8888,
+					    I915_TILING_NONE,
+					    1.0, 0.0, 0.0, &d->fb[0]);
+
+		igt_plane_set_fb(plane, &d->fb[0]);
+		igt_plane_set_size(plane, (width * scaling) / 100, (height * scaling) / 100);
+		ret = igt_display_try_commit_atomic(display, DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
+
+		if (ret != -EINVAL)
+			test_complete = true;
+
+		scaling += 5;
+
+		igt_plane_set_fb(plane, NULL);
+		igt_remove_fb(display->drm_fd, &d->fb[0]);
+	}
+}
+
+static void
+test_plane_downscaling(data_t *d, enum pipe pipe, igt_output_t *output)
+{
+	igt_display_t *display = &d->display;
+	igt_plane_t *plane;
+	uint64_t modifier = is_i915_device(d->drm_fd) ?
+		I915_FORMAT_MOD_Y_TILED : DRM_FORMAT_MOD_LINEAR;
+
+	igt_require(get_num_scalers(d, pipe) > 0);
+
+	for_each_plane_on_pipe(display, pipe, plane) {
+		struct igt_vec tested_formats;
+
+		if (plane->type == DRM_PLANE_TYPE_CURSOR)
+			continue;
+
+		igt_vec_init(&tested_formats, sizeof(uint32_t));
+
+		for (int j = 0; j < plane->drm_plane->count_formats; j++) {
+			uint32_t format = plane->drm_plane->formats[j];
+			if (test_format(d, &tested_formats, format) &&
+			    igt_plane_has_format_mod(plane, format, modifier) &&
+			    can_scale(d, format))
+					__test_plane_downscaling(d, plane, pipe, output);
+		}
+
+		igt_vec_fini(&tested_formats);
+	}
+}
+
 static bool test_pipe_iteration(data_t *data, enum pipe pipe, int iteration)
 {
 	if (!is_i915_device(data->drm_fd) ||
@@ -612,6 +682,13 @@ igt_main_args("", long_opts, help_str, opt_handler, &data)
 					test_plane_upscaling(&data, pipe, output);
 		}
 
+		igt_describe("Tests plane downscaling.");
+		igt_subtest_with_dynamic("plane-downscaling") {
+			for_each_pipe_with_single_output(&data.display, pipe, output)
+				igt_dynamic_f("pipe-%s-%s-downscaling", kmstest_pipe_name(pipe), igt_output_name(output))
+					test_plane_downscaling(&data, pipe, output);
+		}
+
 		igt_describe("Tests scaling with pixel formats.");
 		igt_subtest_with_dynamic("scaler-with-pixel-format") {
 			for_each_pipe_with_single_output(&data.display, pipe, output)
-- 
2.25.1