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drm/tests: helpers: Make sure the device is bound

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The device managed resources are freed when the device is detached, so
it has to be bound in the first place.

Let's create a fake driver that we will bind to our fake device to
benefit from the device managed cleanups in our tests.

Reviewed-by: Maíra Canal <mcanal@igalia.com>
Link: https://lore.kernel.org/r/20221123-rpi-kunit-tests-v3-9-4615a663a84a@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Maxime Ripard 2022-12-01 16:11:40 +01:00
parent 0bdc2e28ef
commit 57a84a97bb
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GPG key ID: E3EF0D6F671851C5
1 changed files with 25 additions and 1 deletions
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26
drivers/gpu/drm/tests/drm_kunit_helpers.c
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@ -18,12 +18,32 @@ struct kunit_dev {
static const struct drm_mode_config_funcs drm_mode_config_funcs = {
};
static int fake_probe(struct platform_device *pdev)
{
return 0;
}
static int fake_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver fake_platform_driver = {
.probe = fake_probe,
.remove = fake_remove,
.driver = {
.name = KUNIT_DEVICE_NAME,
},
};
/**
* drm_kunit_helper_alloc_device - Allocate a mock device for a KUnit test
* @test: The test context object
*
* This allocates a fake struct &device to create a mock for a KUnit
* test.
* test. The device will also be bound to a fake driver. It will thus be
* able to leverage the usual infrastructure and most notably the
* device-managed resources just like a "real" device.
*
* Callers need to make sure drm_kunit_helper_free_device() on the
* device when done.
@ -36,6 +56,9 @@ struct device *drm_kunit_helper_alloc_device(struct kunit *test)
struct platform_device *pdev;
int ret;
ret = platform_driver_register(&fake_platform_driver);
KUNIT_ASSERT_EQ(test, ret, 0);
pdev = platform_device_alloc(KUNIT_DEVICE_NAME, PLATFORM_DEVID_NONE);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
@ -58,6 +81,7 @@ void drm_kunit_helper_free_device(struct kunit *test, struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
platform_device_unregister(pdev);
platform_driver_unregister(&fake_platform_driver);
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_free_device);