drm_connector_pick_cmdline_mode() is in charge of finding a proper drm_display_mode from the definition we got in the video= command line argument. Let's add some unit tests to make sure we're not getting any regressions there. Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx> diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c index bbc535cc50dd..d553e793e673 100644 --- a/drivers/gpu/drm/drm_client_modeset.c +++ b/drivers/gpu/drm/drm_client_modeset.c @@ -1237,3 +1237,7 @@ int drm_client_modeset_dpms(struct drm_client_dev *client, int mode) return ret; } EXPORT_SYMBOL(drm_client_modeset_dpms); + +#ifdef CONFIG_DRM_KUNIT_TEST +#include "tests/drm_client_modeset_test.c" +#endif diff --git a/drivers/gpu/drm/tests/drm_client_modeset_test.c b/drivers/gpu/drm/tests/drm_client_modeset_test.c new file mode 100644 index 000000000000..46335de7bc6b --- /dev/null +++ b/drivers/gpu/drm/tests/drm_client_modeset_test.c @@ -0,0 +1,114 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022 Maxime Ripard <mripard@xxxxxxxxxx> + */ + +#include <kunit/test.h> + +#include <drm/drm_connector.h> +#include <drm/drm_edid.h> +#include <drm/drm_drv.h> +#include <drm/drm_modes.h> +#include <drm/drm_modeset_helper_vtables.h> +#include <drm/drm_probe_helper.h> + +#include "drm_kunit_helpers.h" + +struct drm_client_modeset_test_priv { + struct drm_device *drm; + struct drm_connector connector; +}; + +static int drm_client_modeset_connector_get_modes(struct drm_connector *connector) +{ + struct drm_display_mode *mode; + int count; + + count = drm_add_modes_noedid(connector, 1920, 1200); + + return count; +} + +static const struct drm_connector_helper_funcs drm_client_modeset_connector_helper_funcs = { + .get_modes = drm_client_modeset_connector_get_modes, +}; + +static const struct drm_connector_funcs drm_client_modeset_connector_funcs = { +}; + +static int drm_client_modeset_test_init(struct kunit *test) +{ + struct drm_client_modeset_test_priv *priv; + int ret; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + test->priv = priv; + + priv->drm = drm_kunit_device_init("drm-client-modeset-test"); + if (IS_ERR(priv->drm)) + return PTR_ERR(priv->drm); + + ret = drmm_connector_init(priv->drm, &priv->connector, + &drm_client_modeset_connector_funcs, + DRM_MODE_CONNECTOR_Unknown, + NULL); + if (ret) + return ret; + drm_connector_helper_add(&priv->connector, &drm_client_modeset_connector_helper_funcs); + + return 0; +} + +static void drm_client_modeset_test_exit(struct kunit *test) +{ + struct drm_client_modeset_test_priv *priv = test->priv; + + drm_kunit_device_exit(priv->drm); +} + +static void drm_pick_cmdline_res_1920_1080_60(struct kunit *test) +{ + struct drm_client_modeset_test_priv *priv = test->priv; + struct drm_device *drm = priv->drm; + struct drm_connector *connector = &priv->connector; + struct drm_cmdline_mode *cmdline_mode = &connector->cmdline_mode; + struct drm_display_mode *expected_mode, *mode; + const char *cmdline = "1920x1080@60"; + int ret; + + expected_mode = drm_mode_find_dmt(priv->drm, 1920, 1080, 60, false); + KUNIT_ASSERT_PTR_NE(test, expected_mode, NULL); + + KUNIT_ASSERT_TRUE(test, + drm_mode_parse_command_line_for_connector(cmdline, + connector, + cmdline_mode)); + + mutex_lock(&drm->mode_config.mutex); + ret = drm_helper_probe_single_connector_modes(connector, 1920, 1080); + mutex_unlock(&drm->mode_config.mutex); + KUNIT_ASSERT_GT(test, ret, 0); + + mode = drm_connector_pick_cmdline_mode(connector); + KUNIT_ASSERT_PTR_NE(test, mode, NULL); + + KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected_mode, mode)); +} + +static struct kunit_case drm_pick_cmdline_tests[] = { + KUNIT_CASE(drm_pick_cmdline_res_1920_1080_60), + {} +}; + +static struct kunit_suite drm_pick_cmdline_test_suite = { + .name = "drm_pick_cmdline", + .init = drm_client_modeset_test_init, + .exit = drm_client_modeset_test_exit, + .test_cases = drm_pick_cmdline_tests +}; + +kunit_test_suite(drm_pick_cmdline_test_suite); +MODULE_AUTHOR("Maxime Ripard <mripard@xxxxxxxxxx>"); +MODULE_LICENSE("GPL"); -- b4 0.10.0-dev-65ba7