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. Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx> --- Changes in v4: - Simplified the DRM device cleanup patch using devm_drm_dev_alloc() --- drivers/gpu/drm/tests/Makefile | 1 + drivers/gpu/drm/tests/drm_kunit_helpers.c | 61 +++++++++++++++++++++++++++++++ drivers/gpu/drm/tests/drm_kunit_helpers.h | 9 +++++ 3 files changed, 71 insertions(+) diff --git a/drivers/gpu/drm/tests/Makefile b/drivers/gpu/drm/tests/Makefile index 2d9f49b62ecb..b29ef1085cad 100644 --- a/drivers/gpu/drm/tests/Makefile +++ b/drivers/gpu/drm/tests/Makefile @@ -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 diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.c b/drivers/gpu/drm/tests/drm_kunit_helpers.c new file mode 100644 index 000000000000..3524d6a1fa9a --- /dev/null +++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c @@ -0,0 +1,61 @@ +#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 const struct drm_driver drm_mode_driver = { +}; + +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, char *name) +{ + struct kunit_dev *kdev; + struct drm_device *drm; + struct device *dev; + int ret; + + dev = kunit_alloc_resource(test, dev_init, dev_free, GFP_KERNEL, name); + if (!dev) + return ERR_PTR(-ENOMEM); + + kdev = devm_drm_dev_alloc(dev, &drm_mode_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; +} diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.h b/drivers/gpu/drm/tests/drm_kunit_helpers.h new file mode 100644 index 000000000000..a9354f9bda4e --- /dev/null +++ b/drivers/gpu/drm/tests/drm_kunit_helpers.h @@ -0,0 +1,9 @@ +#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, char *name); + +#endif // DRM_KUNIT_HELPERS_H_ -- b4 0.11.0-dev-7da52