Unverified Commit 44a39283 authored by Maxime Ripard's avatar Maxime Ripard
Browse files

drm/tests: Add Kunit Helpers 



As the number of kunit tests in KMS grows further, we start to have
multiple test suites that, for example, need to register a mock DRM
driver to interact with the KMS function they are supposed to test.

Let's add a file meant to provide those kind of helpers to avoid
duplication.

Reviewed-by: default avatarNoralf Trønnes <noralf@tronnes.org>
Tested-by: default avatarMateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v9-2-24b168e5bcd5@cerno.tech


Signed-off-by: default avatarMaxime Ripard <maxime@cerno.tech>
parent 99e49bfd

drivers/gpu/drm/tests/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ obj-$(CONFIG_DRM_KUNIT_TEST) += \ 
	drm_format_helper_test.o \

	drm_format_test.o \

	drm_framebuffer_test.o \

	drm_kunit_helpers.o \

	drm_mm_test.o \

	drm_plane_helper_test.o \

	drm_rect_test.o

drivers/gpu/drm/tests/drm_kunit_helpers.c

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Original line number Diff line number Diff line 
#include <drm/drm_drv.h>

#include <drm/drm_managed.h>



#include <kunit/resource.h>



#include <linux/device.h>



struct kunit_dev {

	struct drm_device base;

};



static const struct drm_mode_config_funcs drm_mode_config_funcs = {

};



static int dev_init(struct kunit_resource *res, void *ptr)

{

	char *name = ptr;

	struct device *dev;



	dev = root_device_register(name);

	if (IS_ERR(dev))

		return PTR_ERR(dev);



	res->data = dev;

	return 0;

}



static void dev_free(struct kunit_resource *res)

{

	struct device *dev = res->data;



	root_device_unregister(dev);

}



struct drm_device *drm_kunit_device_init(struct kunit *test, u32 features, char *name)

{

	struct kunit_dev *kdev;

	struct drm_device *drm;

	struct drm_driver *driver;

	struct device *dev;

	int ret;



	dev = kunit_alloc_resource(test, dev_init, dev_free, GFP_KERNEL, name);

	if (!dev)

		return ERR_PTR(-ENOMEM);



	driver = kunit_kzalloc(test, sizeof(*driver), GFP_KERNEL);

	if (!driver)

		return ERR_PTR(-ENOMEM);



	driver->driver_features = features;

	kdev = devm_drm_dev_alloc(dev, driver, struct kunit_dev, base);

	if (IS_ERR(kdev))

		return ERR_CAST(kdev);



	drm = &kdev->base;

	drm->mode_config.funcs = &drm_mode_config_funcs;



	ret = drmm_mode_config_init(drm);

	if (ret)

		return ERR_PTR(ret);



	return drm;

}

drivers/gpu/drm/tests/drm_kunit_helpers.h

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#ifndef DRM_KUNIT_HELPERS_H_

#define DRM_KUNIT_HELPERS_H_



struct drm_device;

struct kunit;



struct drm_device *drm_kunit_device_init(struct kunit *test, u32 features, char *name);



#endif // DRM_KUNIT_HELPERS_H_