111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <drm/drm_drv.h>
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#include <drm/drm_kunit_helpers.h>
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#include <drm/drm_managed.h>
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#include <kunit/resource.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#define KUNIT_DEVICE_NAME "drm-kunit-mock-device"
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static const struct drm_mode_config_funcs drm_mode_config_funcs = {
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};
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static int fake_probe(struct platform_device *pdev)
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{
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return 0;
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}
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static int fake_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver fake_platform_driver = {
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.probe = fake_probe,
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.remove = fake_remove,
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.driver = {
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.name = KUNIT_DEVICE_NAME,
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},
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};
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/**
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* drm_kunit_helper_alloc_device - Allocate a mock device for a KUnit test
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* @test: The test context object
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*
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* This allocates a fake struct &device to create a mock for a KUnit
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* test. The device will also be bound to a fake driver. It will thus be
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* able to leverage the usual infrastructure and most notably the
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* device-managed resources just like a "real" device.
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*
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* Callers need to make sure drm_kunit_helper_free_device() on the
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* device when done.
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*
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* Returns:
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* A pointer to the new device, or an ERR_PTR() otherwise.
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*/
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struct device *drm_kunit_helper_alloc_device(struct kunit *test)
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{
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struct platform_device *pdev;
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int ret;
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ret = platform_driver_register(&fake_platform_driver);
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KUNIT_ASSERT_EQ(test, ret, 0);
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pdev = platform_device_alloc(KUNIT_DEVICE_NAME, PLATFORM_DEVID_NONE);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
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ret = platform_device_add(pdev);
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KUNIT_ASSERT_EQ(test, ret, 0);
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return &pdev->dev;
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}
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EXPORT_SYMBOL_GPL(drm_kunit_helper_alloc_device);
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/**
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* drm_kunit_helper_free_device - Frees a mock device
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* @test: The test context object
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* @dev: The device to free
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*
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* Frees a device allocated with drm_kunit_helper_alloc_device().
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*/
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void drm_kunit_helper_free_device(struct kunit *test, struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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platform_device_unregister(pdev);
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platform_driver_unregister(&fake_platform_driver);
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}
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EXPORT_SYMBOL_GPL(drm_kunit_helper_free_device);
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struct drm_device *
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__drm_kunit_helper_alloc_drm_device_with_driver(struct kunit *test,
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struct device *dev,
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size_t size, size_t offset,
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const struct drm_driver *driver)
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{
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struct drm_device *drm;
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void *container;
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int ret;
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container = __devm_drm_dev_alloc(dev, driver, size, offset);
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if (IS_ERR(container))
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return ERR_CAST(container);
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drm = container + offset;
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drm->mode_config.funcs = &drm_mode_config_funcs;
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ret = drmm_mode_config_init(drm);
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if (ret)
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return ERR_PTR(ret);
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return drm;
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}
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EXPORT_SYMBOL_GPL(__drm_kunit_helper_alloc_drm_device_with_driver);
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MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
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MODULE_LICENSE("GPL");
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