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// SPDX-License-Identifier: GPL-2.0
#include <drm/drm_drv.h>
#include <drm/drm_kunit_helpers.h>
#include <drm/drm_managed.h>
#include <kunit/resource.h>
#include <linux/device.h>
#define KUNIT_DEVICE_NAME "drm-kunit-mock-device"
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);
}
/**
* drm_kunit_helper_alloc_drm_device - Allocates a mock DRM device for KUnit tests
* @test: The test context object
* @features: Mocked DRM device driver features
*
* This function allocates a new struct &device, creates a struct
* &drm_driver and will create a struct &drm_device using both.
*
* The device and driver are tied to the @test context and will get
* cleaned at the end of the test. The drm_device is allocated through
* devm_drm_dev_alloc() and will thus be freed through a device-managed
* resource.
*
* Returns:
* A pointer to the new drm_device, or an ERR_PTR() otherwise.
*/
struct drm_device *
drm_kunit_helper_alloc_drm_device(struct kunit *test,
u32 features)
{
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, KUNIT_DEVICE_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;
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_alloc_drm_device);
MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
MODULE_LICENSE("GPL");
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