chamelium: Add support for VGA frame comparison testing

This adds support for VGA frame comparison testing with the reference
generated from cairo. The retrieved frame from the chamelium is first
cropped, as it contains the blanking intervals, through a dedicated
helper. Another helper function asserts that the analog frame
matches or dump it to png if not.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Lyude <lyude@redhat.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/tests/chamelium.c b/tests/chamelium.c
index 34448152..33ecc2e7 100644
--- a/tests/chamelium.c
+++ b/tests/chamelium.c
@@ -399,6 +399,10 @@ enable_output(data_t *data,
 					    BROADCAST_RGB_FULL);
 
 	igt_display_commit(display);
+
+	if (chamelium_port_get_type(port) == DRM_MODE_CONNECTOR_VGA)
+		usleep(250000);
+
 	chamelium_port_wait_video_input_stable(data->chamelium, port,
 					       HOTPLUG_TIMEOUT);
 
@@ -533,6 +537,56 @@ test_display_frame_dump(data_t *data, struct chamelium_port *port)
 }
 
 static void
+test_analog_frame_dump(data_t *data, struct chamelium_port *port)
+{
+	igt_display_t display;
+	igt_output_t *output;
+	igt_plane_t *primary;
+	struct igt_fb fb;
+	struct chamelium_frame_dump *frame;
+	drmModeModeInfo *mode;
+	drmModeConnector *connector;
+	int fb_id, i;
+
+	output = prepare_output(data, &display, port);
+	connector = chamelium_port_get_connector(data->chamelium, port, false);
+	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+	igt_assert(primary);
+
+	for (i = 0; i < connector->count_modes; i++) {
+		mode = &connector->modes[i];
+
+		fb_id = igt_create_color_pattern_fb(data->drm_fd,
+						    mode->hdisplay, mode->vdisplay,
+						    DRM_FORMAT_XRGB8888,
+						    LOCAL_DRM_FORMAT_MOD_NONE,
+						    0, 0, 0, &fb);
+		igt_assert(fb_id > 0);
+
+		enable_output(data, port, output, mode, &fb);
+
+		igt_debug("Reading frame dumps from Chamelium...\n");
+
+		frame = chamelium_port_dump_pixels(data->chamelium, port, 0, 0,
+						   0, 0);
+
+		chamelium_crop_analog_frame(frame, mode->hdisplay,
+					    mode->vdisplay);
+
+		chamelium_assert_analog_frame_match_or_dump(data->chamelium,
+							    port, frame, &fb);
+
+		chamelium_destroy_frame_dump(frame);
+
+		disable_output(data, port, output);
+		igt_remove_fb(data->drm_fd, &fb);
+	}
+
+	drmModeFreeConnector(connector);
+	igt_display_fini(&display);
+}
+
+static void
 test_hpd_without_ddc(data_t *data, struct chamelium_port *port)
 {
 	struct udev_monitor *mon = igt_watch_hotplug();
@@ -775,6 +829,9 @@ igt_main
 
 		connector_subtest("vga-hpd-without-ddc", VGA)
 			test_hpd_without_ddc(&data, port);
+
+		connector_subtest("vga-frame-dump", VGA)
+			test_analog_frame_dump(&data, port);
 	}
 
 	igt_subtest_group {