Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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: Noralf Trønnes <noralf@tronnes.org>
Tested-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v9-2-24b168e5bcd5@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+74
+1
drivers/gpu/drm/tests/Makefile
+1
drivers/gpu/drm/tests/Makefile
+64
drivers/gpu/drm/tests/drm_kunit_helpers.c
+64
drivers/gpu/drm/tests/drm_kunit_helpers.c
···
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#include <drm/drm_drv.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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struct kunit_dev {
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struct drm_device base;
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};
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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 dev_init(struct kunit_resource *res, void *ptr)
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{
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char *name = ptr;
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struct device *dev;
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dev = root_device_register(name);
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if (IS_ERR(dev))
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return PTR_ERR(dev);
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res->data = dev;
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return 0;
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}
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static void dev_free(struct kunit_resource *res)
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{
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struct device *dev = res->data;
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root_device_unregister(dev);
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}
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struct drm_device *drm_kunit_device_init(struct kunit *test, u32 features, char *name)
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{
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struct kunit_dev *kdev;
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struct drm_device *drm;
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struct drm_driver *driver;
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struct device *dev;
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int ret;
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dev = kunit_alloc_resource(test, dev_init, dev_free, GFP_KERNEL, name);
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if (!dev)
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return ERR_PTR(-ENOMEM);
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driver = kunit_kzalloc(test, sizeof(*driver), GFP_KERNEL);
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if (!driver)
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return ERR_PTR(-ENOMEM);
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driver->driver_features = features;
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kdev = devm_drm_dev_alloc(dev, driver, struct kunit_dev, base);
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if (IS_ERR(kdev))
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return ERR_CAST(kdev);
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drm = &kdev->base;
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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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}