[igt-dev] [PATCH i-g-t v2 2/2] igt/tests/kms_dp_tiled_display: kms test for display port tiled displays

Madhumitha Tolakanahalli Pradeep madhumitha.tolakanahalli.pradeep at intel.com
Fri Aug 23 18:23:51 UTC 2019


This test validates the tiled DP displays to display a test pattern
seamlessly across the two tiles. It validates the transcoder port
sync feature on i915 to get a tearfree tiled display output.

Related kernel work patches-
https://patchwork.freedesktop.org/series/59837/#rev4.

This test can eventually be extended to cover tiled display support
on other connector types.

v2: Added a check for checking pageflip event timestamps (Simon, Manasi)
    Minor style changes (Simon)
   Code clean-up and reordering


Cc: Manasi Navare <manasi.d.navare at intel.com>
Cc: Petri Latvala <petri.latvala at intel.com>
Cc: Simon Ser <simon.ser at intel.com>

Cc: <madhumitha.tp at gmail.com>

Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>
---
 tests/Makefile.sources       |   1 +
 tests/kms_dp_tiled_display.c | 346 +++++++++++++++++++++++++++++++++++
 tests/meson.build            |   1 +
 3 files changed, 348 insertions(+)
 create mode 100644 tests/kms_dp_tiled_display.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index c02e4d94..7561ab9b 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -41,6 +41,7 @@ TESTS_progs = \
 	kms_cursor_edge_walk \
 	kms_cursor_legacy \
 	kms_dp_dsc \
+	kms_dp_tiled_display \
 	kms_draw_crc \
 	kms_fbcon_fbt \
 	kms_fence_pin_leak \
diff --git a/tests/kms_dp_tiled_display.c b/tests/kms_dp_tiled_display.c
new file mode 100644
index 00000000..162fbdd9
--- /dev/null
+++ b/tests/kms_dp_tiled_display.c
@@ -0,0 +1,346 @@
+/*
+ * Copyright © 2018 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *  Madhumitha Tolakanahalli Pradeep
+ *      <madhumitha.tolakanahalli.pradeep at intel.com>
+ *
+ * Display Port Tiled Display Test
+ * This test parses the tile information of the connectors that have TILE
+ * property set, sets up the framebuffer with correct offsets corresponding to
+ * the tile offsets and does an atomic modeset with two CRTCs for two
+ * connectors. Page flip event timestamp from each CRTC is collected and
+ * compared to make sure that they occurred in a synchronous manner.
+ *
+ * This test currently supports only horizontally tiled displays, in line with
+ * the displays supported by the kernel at the moment.
+ */
+
+#include "igt.h"
+#include "poll.h"
+#include "drm_mode.h"
+#include "drm_fourcc.h"
+
+IGT_TEST_DESCRIPTION("Test for Display Port Tiled Displays");
+
+typedef struct {
+	int drm_fd;
+	int num_h_tiles;
+	igt_display_t *display;
+	enum igt_commit_style commit;
+} data_t;
+
+typedef struct {
+	igt_output_t *output;
+	igt_tile_info_t tile;
+	igt_fb_t fb_test_pattern;
+	enum pipe pipe;
+	enum igt_commit_style commit;
+	drmModeConnectorPtr connector;
+} data_connector_t;
+
+static int drm_property_is_tile(drmModePropertyPtr prop)
+{
+	return (strcmp(prop->name , "TILE") ? 0 : 1) &&
+			 drm_property_type_is(prop, DRM_MODE_PROP_BLOB);
+}
+
+static void get_connector_tile_props(data_t *data, drmModeConnectorPtr conn,
+		igt_tile_info_t *tile)
+{
+	int i = 0;
+	drmModePropertyPtr prop;
+	drmModePropertyBlobPtr blob;
+
+	for (i = 0; i < conn->count_props; i++) {
+		prop = drmModeGetProperty(data->drm_fd, conn->props[i]);
+
+		igt_assert(prop);
+
+		if (!drm_property_is_tile(prop))
+			continue;
+
+		blob = drmModeGetPropertyBlob(data->drm_fd,
+				conn->prop_values[i]);
+
+		if (!blob)
+			return;
+
+		igt_parse_connector_tile_blob(blob, tile);
+		break;
+	}
+
+	drmModeFreeProperty(prop);
+	drmModeFreePropertyBlob(blob);
+}
+
+static void get_number_of_h_tiles(data_t *data)
+{
+	int i;
+	drmModeResPtr res;
+	drmModeConnectorPtr connector;
+	igt_tile_info_t tile = {.num_h_tile = 0};
+
+	igt_assert(res = drmModeGetResources(data->drm_fd));
+
+	for (i = 0; i < res->count_connectors; i++) {
+		connector = drmModeGetConnectorCurrent(data->drm_fd,
+				res->connectors[i]);
+
+		igt_assert(connector);
+
+		if (!(connector->connection == DRM_MODE_CONNECTED &&
+			connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort))
+			continue;
+
+		get_connector_tile_props(data, connector, &tile);
+		data->num_h_tiles = tile.num_h_tile;
+		break;
+	}
+
+	drmModeFreeResources(res);
+	drmModeFreeConnector(connector);
+}
+
+static void get_connector(data_t *data, data_connector_t *conn)
+{
+	int count = 0;
+	igt_output_t *output;
+
+	for_each_connected_output(data->display, output) {
+		conn[count].connector = drmModeGetConnector(data->display->drm_fd,
+						output->id);
+
+		igt_assert(conn[count].connector);
+
+		if (!(conn[count].connector->connector_type ==
+			DRM_MODE_CONNECTOR_DisplayPort))
+			continue;
+
+		get_connector_tile_props(data, conn[count].connector,
+			&conn[count].tile);
+
+		/* Check if the connectors belong to the same tile group */
+		if (count > 0)
+			igt_assert(conn[count].tile.tile_group_id ==
+				conn[count-1].tile.tile_group_id);
+
+		count++;
+	}
+}
+
+static void
+reset_framebuffer(int drm_fd, igt_output_t *output, igt_fb_t *fb)
+{
+	igt_plane_t *primary;
+
+	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+	igt_plane_set_fb(primary, NULL);
+	igt_remove_fb(drm_fd, fb);
+}
+
+static void reset_output(igt_output_t *output)
+{
+	igt_output_set_pipe(output, PIPE_NONE);
+}
+
+static void test_cleanup(data_t *data, data_connector_t *conn)
+{
+	int count;
+
+	for (count = 0; count < data->num_h_tiles; count++) {
+		if (conn[count].output) {
+			reset_framebuffer(data->drm_fd, conn[count].output,
+				&conn[count].fb_test_pattern);
+			reset_output(conn[count].output);
+		}
+	}
+	igt_display_commit2(data->display, data->commit);
+}
+
+static void setup_mode(data_t *data, data_connector_t *conn_data)
+{
+	int count = 0;
+	enum pipe pipe;
+	igt_output_t *output;
+
+	for (count = 0; count < data->num_h_tiles; count++) {
+		output = igt_output_from_connector(data->display,
+				conn_data[count].connector);
+
+		/*
+		 * The output is set to PIPE_NONE and then assigned a pipe.
+		 * This is done to ensure a complete modeset occures every
+		 * time the test is run.
+		 */
+		reset_output(output);
+
+		for_each_pipe(data->display, pipe) {
+			if (count > 0 && pipe == conn_data[count-1].pipe)
+				continue;
+
+			if (igt_pipe_connector_valid(pipe, output)) {
+
+				conn_data[count].pipe = pipe;
+				conn_data[count].output = output;
+
+				igt_output_set_pipe(conn_data[count].output,
+					conn_data[count].pipe);
+				break;
+			}
+		}
+	}
+	igt_display_commit_atomic(data->display, DRM_MODE_ATOMIC_ALLOW_MODESET,
+		NULL);
+}
+
+static void setup_framebuffer(data_t *data, data_connector_t *conn)
+{
+	int count;
+	igt_plane_t *primary;
+
+	for (count = 0; count < data->num_h_tiles; count++) {
+
+		igt_create_pattern_fb(data->drm_fd,
+			(conn[count].tile.tile_h_size *
+			data->num_h_tiles),
+			conn[count].tile.tile_v_size,
+			DRM_FORMAT_XBGR8888,
+			LOCAL_DRM_FORMAT_MOD_NONE,
+			&conn[count].fb_test_pattern);
+
+		primary = igt_output_get_plane_type(conn[count].output,
+				DRM_PLANE_TYPE_PRIMARY);
+
+		igt_plane_set_fb(primary, &conn[count].fb_test_pattern);
+
+		igt_fb_set_size(&conn[count].fb_test_pattern, primary,
+				conn[count].tile.tile_h_size,
+				conn[count].tile.tile_v_size);
+
+		igt_fb_set_position(&conn[count].fb_test_pattern, primary,
+				(conn[count].tile.tile_h_size *
+				conn[count].tile.tile_h_loc),
+				(conn[count].tile.tile_v_size *
+				conn[count].tile.tile_v_loc));
+
+		igt_plane_set_size(primary,
+				conn[count].tile.tile_h_size,
+				conn[count].tile.tile_v_size);
+	}
+}
+
+static void page_flip_handler(int fd, unsigned int seq,
+		unsigned int tv_sec, unsigned int tv_usec,
+		unsigned int crtc_id, void *data)
+{
+	bool expr = false;
+	static unsigned int _tv_sec, _tv_usec;
+
+	igt_debug("Page Flip Event received from CRTC:%d at %u:%u\n", crtc_id,
+		tv_sec, tv_usec);
+
+	/* Skip the following checks for the first page flip event */
+	if (_tv_sec == 0 || _tv_usec == 0) {
+		_tv_sec = tv_sec;
+		_tv_usec = tv_usec;
+		return;
+	}
+
+	/*
+	 * For seamless tear-free display, the page flip event timestamps
+	 * from all the tiles should not differ by more than 10us.
+	 */
+	expr = tv_sec == _tv_sec && (abs(tv_usec - _tv_usec) < 10);
+
+	igt_fail_on_f(!expr, "Delayed page flip event from CRTC:%d at %u:%u\n",
+		crtc_id, tv_sec, tv_usec);
+
+	if (tv_sec < _tv_sec)
+		_tv_sec = tv_sec;
+	if (tv_usec < _tv_usec)
+		_tv_usec = tv_usec;
+}
+
+static void wait_for_pageflip(int drm_fd)
+{
+	struct pollfd pfd;
+	drmEventContext drm_event;
+
+	drm_event.version = 3;
+	drm_event.page_flip_handler2 = page_flip_handler;
+
+	pfd.fd = drm_fd;
+	pfd.events = POLLIN;
+	pfd.revents = 0;
+
+	poll(&pfd, 1, 1000);
+	if (pfd.revents & POLLIN)
+		drmHandleEvent(drm_fd, &drm_event);
+}
+
+igt_main
+{
+	igt_display_t display;
+	data_connector_t *conn_data = NULL;
+	data_t data = {.drm_fd = 0, .num_h_tiles = 0,
+		       .display = NULL, .commit = COMMIT_LEGACY};
+
+	igt_fixture {
+		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
+
+		kmstest_set_vt_graphics_mode();
+		igt_display_require(&display, data.drm_fd);
+		igt_display_reset(&display);
+
+		data.display = &display;
+
+		get_number_of_h_tiles(&data);
+		igt_debug("Number of Horizontal Tiles: %d\n", data.num_h_tiles);
+
+		data.commit = data.display->is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY;
+
+		if (data.num_h_tiles > 0)
+			conn_data = malloc(data.num_h_tiles * sizeof(data_connector_t));
+	}
+
+	igt_subtest("basic-test-pattern") {
+		igt_skip_on(data.num_h_tiles == 0);
+		igt_assert(conn_data);
+
+		get_connector(&data, conn_data);
+		setup_mode(&data, conn_data);
+		setup_framebuffer(&data, conn_data);
+		igt_display_commit_atomic(data.display, DRM_MODE_ATOMIC_NONBLOCK |
+			DRM_MODE_PAGE_FLIP_EVENT, NULL);
+		wait_for_pageflip(data.drm_fd);
+
+		test_cleanup(&data, conn_data);
+	}
+
+	igt_fixture {
+		free(conn_data);
+		close(data.drm_fd);
+		kmstest_restore_vt_mode();
+		igt_display_fini(data.display);
+	}
+}
diff --git a/tests/meson.build b/tests/meson.build
index a7b2b322..50292df8 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -26,6 +26,7 @@ test_progs = [
 	'kms_cursor_edge_walk',
 	'kms_cursor_legacy',
 	'kms_dp_dsc',
+	'kms_dp_tiled_display',
 	'kms_draw_crc',
 	'kms_fbcon_fbt',
 	'kms_fence_pin_leak',
-- 
2.17.1



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