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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>
/* Ought to be enough for anybody */
#define TEST_TIMEOUT_MS 100
struct managed_test_priv {
struct drm_device *drm;
bool action_done;
wait_queue_head_t action_wq;
};
static void drm_action(struct drm_device *drm, void *ptr)
{
struct managed_test_priv *priv = ptr;
priv->action_done = true;
wake_up_interruptible(&priv->action_wq);
}
/*
* The test verifies that the release action is called when
* drmm_release_action is called.
*/
static void drm_test_managed_release_action(struct kunit *test)
{
struct managed_test_priv *priv = test->priv;
int ret;
ret = drmm_add_action_or_reset(priv->drm, drm_action, priv);
KUNIT_EXPECT_EQ(test, ret, 0);
ret = drm_dev_register(priv->drm, 0);
KUNIT_ASSERT_EQ(test, ret, 0);
drmm_release_action(priv->drm, drm_action, priv);
ret = wait_event_interruptible_timeout(priv->action_wq, priv->action_done,
msecs_to_jiffies(TEST_TIMEOUT_MS));
KUNIT_EXPECT_GT(test, ret, 0);
drm_dev_unregister(priv->drm);
drm_kunit_helper_free_device(test, priv->drm->dev);
}
/*
* The test verifies that the release action is called automatically when the
* device is released.
*/
static void drm_test_managed_run_action(struct kunit *test)
{
struct managed_test_priv *priv = test->priv;
int ret;
ret = drmm_add_action_or_reset(priv->drm, drm_action, priv);
KUNIT_EXPECT_EQ(test, ret, 0);
ret = drm_dev_register(priv->drm, 0);
KUNIT_ASSERT_EQ(test, ret, 0);
drm_dev_unregister(priv->drm);
drm_kunit_helper_free_device(test, priv->drm->dev);
ret = wait_event_interruptible_timeout(priv->action_wq, priv->action_done,
msecs_to_jiffies(TEST_TIMEOUT_MS));
KUNIT_EXPECT_GT(test, ret, 0);
}
static int drm_managed_test_init(struct kunit *test)
{
struct managed_test_priv *priv;
struct device *dev;
priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
init_waitqueue_head(&priv->action_wq);
dev = drm_kunit_helper_alloc_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
/*
* DRM device can't be embedded in priv, since priv->action_done needs
* to remain allocated beyond both parent device and drm_device
* lifetime.
*/
priv->drm = __drm_kunit_helper_alloc_drm_device(test, dev, sizeof(*priv->drm), 0,
DRIVER_MODESET);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
test->priv = priv;
return 0;
}
static struct kunit_case drm_managed_tests[] = {
KUNIT_CASE(drm_test_managed_release_action),
KUNIT_CASE(drm_test_managed_run_action),
{}
};
static struct kunit_suite drm_managed_test_suite = {
.name = "drm_managed",
.init = drm_managed_test_init,
.test_cases = drm_managed_tests
};
kunit_test_suite(drm_managed_test_suite);
MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
MODULE_LICENSE("GPL");
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