drivers/gpu/drm/tests/drm_client_modeset_test.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/tests/drm_client_modeset_test.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/tests/drm_client_modeset_test.c
Extension
.c
Size
5852 bytes
Lines
204
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct drm_client_modeset_test_priv {
	struct drm_device *drm;
	struct device *dev;
	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);

	mode = drm_mode_analog_ntsc_480i(connector->dev);
	if (!mode)
		return count;

	drm_mode_probed_add(connector, mode);
	count += 1;

	mode = drm_mode_analog_pal_576i(connector->dev);
	if (!mode)
		return count;

	drm_mode_probed_add(connector, mode);
	count += 1;

	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 = {
	.atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state
};

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);
	KUNIT_ASSERT_NOT_NULL(test, priv);

	test->priv = priv;

	priv->dev = drm_kunit_helper_alloc_device(test);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);

	priv->drm = __drm_kunit_helper_alloc_drm_device(test, priv->dev,
							sizeof(*priv->drm), 0,
							DRIVER_MODESET);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);

	ret = drmm_connector_init(priv->drm, &priv->connector,
				  &drm_client_modeset_connector_funcs,
				  DRM_MODE_CONNECTOR_Unknown,
				  NULL);
	KUNIT_ASSERT_EQ(test, ret, 0);

	drm_connector_helper_add(&priv->connector, &drm_client_modeset_connector_helper_funcs);

	priv->connector.interlace_allowed = true;
	priv->connector.doublescan_allowed = true;

	return 0;
}

static void drm_test_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;
	const struct drm_display_mode *mode;
	const char *cmdline = "1920x1080@60";
	int ret;

	expected_mode = drm_mode_find_dmt(priv->drm, 1920, 1080, 60, false);
	KUNIT_ASSERT_NOT_NULL(test, expected_mode);

	ret = drm_kunit_add_mode_destroy_action(test, expected_mode);
	KUNIT_ASSERT_EQ(test, ret, 0);

	KUNIT_ASSERT_TRUE(test,
			  drm_mode_parse_command_line_for_connector(cmdline,

Annotation

Implementation Notes