[igt-dev] [PATCH i-g-t v5 2/6] kms_writeback: Add initial writeback tests

Liviu Dudau
2019-01-15T17:47:43Z

From: Brian Starkey <brian.starkey@arm.com>

Add tests for the WRITEBACK_PIXEL_FORMATS, WRITEBACK_OUT_FENCE_PTR and
WRITEBACK_FB_ID properties on writeback connectors, ensuring their
behaviour is correct.

Signed-off-by: Brian Starkey <brian.starkey@arm.com>
[rebased and updated do_writeback_test() function to address feedback]
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
---
tests/Makefile.sources | 1 +
tests/kms_writeback.c | 314 +++++++++++++++++++++++++++++++++++++++++
tests/meson.build | 1 +
3 files changed, 316 insertions(+)
create mode 100644 tests/kms_writeback.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 519eac792..4438d2165 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -90,6 +90,7 @@ TESTS_progs = \
kms_universal_plane \
kms_vblank \
kms_sequence \
+ kms_writeback \
meta_test \
perf \
perf_pmu \
diff --git a/tests/kms_writeback.c b/tests/kms_writeback.c
new file mode 100644
index 000000000..66ef48a6c
--- /dev/null
+++ b/tests/kms_writeback.c
@@ -0,0 +1,314 @@
+/*
+ * (C) COPYRIGHT 2017 ARM Limited. All rights reserved.
+ *
+ * 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.
+ *
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "igt.h"
+#include "igt_core.h"
+#include "igt_fb.h"
+
+static drmModePropertyBlobRes *get_writeback_formats_blob(igt_output_t *output)
+{
+ drmModePropertyBlobRes *blob = NULL;
+ uint64_t blob_id;
+ int ret;
+
+ ret = kmstest_get_property(output->display->drm_fd,
+ output->config.connector->connector_id,
+ DRM_MODE_OBJECT_CONNECTOR,
+ igt_connector_prop_names[IGT_CONNECTOR_WRITEBACK_PIXEL_FORMATS],
+ NULL, &blob_id, NULL);
+ if (ret)
+ blob = drmModeGetPropertyBlob(output->display->drm_fd, blob_id);
+
+ igt_assert(blob);
+
+ return blob;
+}
+
+static bool check_writeback_config(igt_display_t *display, igt_output_t *output)
+{
+ igt_fb_t input_fb, output_fb;
+ igt_plane_t *plane;
+ uint32_t writeback_format = DRM_FORMAT_XRGB8888;
+ uint64_t tiling = igt_fb_mod_to_tiling(0);
+ int width, height, ret;
+ drmModeModeInfo override_mode = {
+ .clock = 25175,
+ .hdisplay = 640,
+ .hsync_start = 656,
+ .hsync_end = 752,
+ .htotal = 800,
+ .hskew = 0,
+ .vdisplay = 480,
+ .vsync_start = 490,
+ .vsync_end = 492,
+ .vtotal = 525,
+ .vscan = 0,
+ .vrefresh = 60,
+ .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+ .name = {"640x480-60"},
+ };
+ igt_output_override_mode(output, &override_mode);
+
+ width = override_mode.hdisplay;
+ height = override_mode.vdisplay;
+
+ ret = igt_create_fb(display->drm_fd, width, height, DRM_FORMAT_XRGB8888, tiling, &input_fb);
+ igt_assert(ret >= 0);
+
+ ret = igt_create_fb(display->drm_fd, width, height, writeback_format, tiling, &output_fb);
+ igt_assert(ret >= 0);
+
+ plane = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+ igt_plane_set_fb(plane, &input_fb);
+ igt_output_set_writeback_fb(output, &output_fb);
+
+ ret = igt_display_try_commit_atomic(display, DRM_MODE_ATOMIC_TEST_ONLY |
+ DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
+ igt_plane_set_fb(plane, NULL);
+ igt_remove_fb(display->drm_fd, &input_fb);
+ igt_remove_fb(display->drm_fd, &output_fb);
+
+ return !ret;
+}
+
+static igt_output_t *kms_writeback_get_output(igt_display_t *display)
+{
+ int i;
+
+ for (i = 0; i < display->n_outputs; i++) {
+ igt_output_t *output = &display->outputs[i];
+ int j;
+
+ if (output->config.connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
+ continue;
+
+ kmstest_force_connector(display->drm_fd, output->config.connector, FORCE_CONNECTOR_ON);
+
+ for (j = 0; j < igt_display_get_n_pipes(display); j++) {
+ igt_output_set_pipe(output, j);
+
+ if (check_writeback_config(display, output)) {
+ igt_debug("Using connector %u:%s on pipe %d\n",
+ output->config.connector->connector_id,
+ output->name, j);
+ return output;
+ }
+ }
+
+ /* Restore any connectors we don't use, so we don't trip on them later */
+ kmstest_force_connector(display->drm_fd, output->config.connector, FORCE_CONNECTOR_UNSPECIFIED);
+ }
+
+ return NULL;
+}
+
+static void check_writeback_fb_id(igt_output_t *output)
+{
+ uint64_t check_fb_id;
+
+ check_fb_id = igt_output_get_prop(output, IGT_CONNECTOR_WRITEBACK_FB_ID);
+ igt_assert(check_fb_id == 0);
+}
+
+static int do_writeback_test(igt_output_t *output, uint32_t flags,
+ uint32_t fb_id, int32_t *out_fence_ptr,
+ bool ptr_valid)
+{
+ int ret;
+ igt_display_t *display = output->display;
+ struct kmstest_connector_config *config = &output->config;
+
+ igt_output_set_prop_value(output, IGT_CONNECTOR_CRTC_ID, config->crtc->crtc_id);
+ igt_output_set_prop_value(output, IGT_CONNECTOR_WRITEBACK_FB_ID, fb_id);
+ igt_output_set_prop_value(output, IGT_CONNECTOR_WRITEBACK_OUT_FENCE_PTR, (uint64_t)out_fence_ptr);
+
+ if (ptr_valid)
+ *out_fence_ptr = 0;
+
+ ret = igt_display_try_commit_atomic(display, flags, NULL);
+
+ if (ptr_valid)
+ igt_assert(*out_fence_ptr == -1);
+
+ /* WRITEBACK_FB_ID must always read as zero */
+ check_writeback_fb_id(output);
+
+ return ret;
+}
+
+static void invalid_out_fence(igt_output_t *output, igt_fb_t *valid_fb, igt_fb_t *invalid_fb)
+{
+ int i, ret;
+ int32_t out_fence;
+ struct {
+ uint32_t fb_id;
+ bool ptr_valid;
+ int32_t *out_fence_ptr;
+ } invalid_tests[] = {
+ {
+ /* No output buffer, but the WRITEBACK_OUT_FENCE_PTR set. */
+ .fb_id = 0,
+ .ptr_valid = true,
+ .out_fence_ptr = &out_fence,
+ },
+ {
+ /* Invalid output buffer. */
+ .fb_id = invalid_fb->fb_id,
+ .ptr_valid = true,
+ .out_fence_ptr = &out_fence,
+ },
+ {
+ /* Invalid WRITEBACK_OUT_FENCE_PTR. */
+ .fb_id = valid_fb->fb_id,
+ .ptr_valid = false,
+ .out_fence_ptr = (int32_t *)0x8,
+ },
+ };
+
+ for (i = 0; i < ARRAY_SIZE(invalid_tests); i++) {
+ ret = do_writeback_test(output, DRM_MODE_ATOMIC_ALLOW_MODESET,
+ invalid_tests[i].fb_id,
+ invalid_tests[i].out_fence_ptr,
+ invalid_tests[i].ptr_valid);
+ igt_assert(ret != 0);
+ }
+}
+
+static void writeback_fb_id(igt_output_t *output, igt_fb_t *valid_fb, igt_fb_t *invalid_fb)
+{
+
+ int ret;
+
+ /* Valid output buffer */
+ ret = do_writeback_test(output, DRM_MODE_ATOMIC_ALLOW_MODESET,
+ valid_fb->fb_id, NULL, false);
+ igt_assert(ret == 0);
+
+ /* Invalid object for WRITEBACK_FB_ID */
+ ret = do_writeback_test(output, DRM_MODE_ATOMIC_ALLOW_MODESET,
+ output->id, NULL, false);
+ igt_assert(ret == -EINVAL);
+
+ /* Zero WRITEBACK_FB_ID */
+ ret = do_writeback_test(output, DRM_MODE_ATOMIC_ALLOW_MODESET,
+ 0, NULL, false);
+ igt_assert(ret == 0);
+}
+
+igt_main
+{
+ igt_display_t display;
+ igt_output_t *output;
+ igt_plane_t *plane;
+ igt_fb_t input_fb;
+ drmModeModeInfo mode;
+ int ret;
+
+ memset(&display, 0, sizeof(display));
+
+ igt_fixture {
+ display.drm_fd = drm_open_driver_master(DRIVER_ANY);
+ igt_display_require(&display, display.drm_fd);
+
+ kmstest_set_vt_graphics_mode();
+
+ igt_display_require(&display, display.drm_fd);
+
+ igt_require(display.is_atomic);
+
+ output = kms_writeback_get_output(&display);
+ igt_require(output);
+
+ if (output->use_override_mode)
+ memcpy(&mode, &output->override_mode, sizeof(mode));
+ else
+ memcpy(&mode, &output->config.default_mode, sizeof(mode));
+
+ plane = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+ igt_require(plane);
+
+ ret = igt_create_fb(display.drm_fd, mode.hdisplay,
+ mode.vdisplay,
+ DRM_FORMAT_XRGB8888,
+ igt_fb_mod_to_tiling(0),
+ &input_fb);
+ igt_assert(ret >= 0);
+ igt_plane_set_fb(plane, &input_fb);
+ }
+
+ igt_subtest("writeback-pixel-formats") {
+ drmModePropertyBlobRes *formats_blob = get_writeback_formats_blob(output);
+ const char *valid_chars = "0123456 ABCGNRUVXY";
+ unsigned int i;
+ char *c;
+
+ /*
+ * We don't have a comprehensive list of formats, so just check
+ * that the blob length is sensible and that it doesn't contain
+ * any outlandish characters
+ */
+ igt_assert(!(formats_blob->length % 4));
+ c = formats_blob->data;
+ for (i = 0; i < formats_blob->length; i++)
+ igt_assert_f(strchr(valid_chars, c[i]),
+ "Unexpected character %c\n", c[i]);
+ }
+
+ igt_subtest("writeback-invalid-out-fence") {
+ igt_fb_t invalid_fb;
+ ret = igt_create_fb(display.drm_fd, mode.hdisplay / 2,
+ mode.vdisplay / 2,
+ DRM_FORMAT_XRGB8888,
+ igt_fb_mod_to_tiling(0),
+ &invalid_fb);
+ igt_require(ret > 0);
+
+ invalid_out_fence(output, &input_fb, &invalid_fb);
+
+ igt_remove_fb(display.drm_fd, &invalid_fb);
+ }
+
+ igt_subtest("writeback-fb-id") {
+ igt_fb_t output_fb;
+ ret = igt_create_fb(display.drm_fd, mode.hdisplay, mode.vdisplay,
+ DRM_FORMAT_XRGB8888,
+ igt_fb_mod_to_tiling(0),
+ &output_fb);
+ igt_require(ret > 0);
+
+ writeback_fb_id(output, &input_fb, &output_fb);
+
+ igt_remove_fb(display.drm_fd, &output_fb);
+ }
+
+ igt_fixture {
+ igt_remove_fb(display.drm_fd, &input_fb);
+ igt_display_fini(&display);
+ }
+}
diff --git a/tests/meson.build b/tests/meson.build
index e14ab2b45..41e78b8ee 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -60,6 +60,7 @@ test_progs = [
'kms_tv_load_detect',
'kms_universal_plane',
'kms_vblank',
+ 'kms_writeback',
'meta_test',
'perf',
'pm_backlight',
--
2.20.1