1// SPDX-License-Identifier: GPL-2.0
2
3#include <drm/drm_drv.h>
4#include <drm/drm_kunit_helpers.h>
5#include <drm/drm_managed.h>
6
7#include <kunit/resource.h>
8
9#include <linux/device.h>
10
11/* Ought to be enough for anybody */
12#define TEST_TIMEOUT_MS 100
13
14struct managed_test_priv {
15 struct drm_device *drm;
16 bool action_done;
17 wait_queue_head_t action_wq;
18};
19
20static void drm_action(struct drm_device *drm, void *ptr)
21{
22 struct managed_test_priv *priv = ptr;
23
24 priv->action_done = true;
25 wake_up_interruptible(&priv->action_wq);
26}
27
28/*
29 * The test verifies that the release action is called when
30 * drmm_release_action is called.
31 */
32static void drm_test_managed_release_action(struct kunit *test)
33{
34 struct managed_test_priv *priv = test->priv;
35 int ret;
36
37 ret = drmm_add_action_or_reset(priv->drm, drm_action, priv);
38 KUNIT_EXPECT_EQ(test, ret, 0);
39
40 ret = drm_dev_register(dev: priv->drm, flags: 0);
41 KUNIT_ASSERT_EQ(test, ret, 0);
42
43 drmm_release_action(dev: priv->drm, action: drm_action, data: priv);
44 ret = wait_event_interruptible_timeout(priv->action_wq, priv->action_done,
45 msecs_to_jiffies(TEST_TIMEOUT_MS));
46 KUNIT_EXPECT_GT(test, ret, 0);
47
48 drm_dev_unregister(dev: priv->drm);
49 drm_kunit_helper_free_device(test, dev: priv->drm->dev);
50}
51
52/*
53 * The test verifies that the release action is called automatically when the
54 * device is released.
55 */
56static void drm_test_managed_run_action(struct kunit *test)
57{
58 struct managed_test_priv *priv = test->priv;
59 int ret;
60
61 ret = drmm_add_action_or_reset(priv->drm, drm_action, priv);
62 KUNIT_EXPECT_EQ(test, ret, 0);
63
64 ret = drm_dev_register(dev: priv->drm, flags: 0);
65 KUNIT_ASSERT_EQ(test, ret, 0);
66
67 drm_dev_unregister(dev: priv->drm);
68 drm_kunit_helper_free_device(test, dev: priv->drm->dev);
69
70 ret = wait_event_interruptible_timeout(priv->action_wq, priv->action_done,
71 msecs_to_jiffies(TEST_TIMEOUT_MS));
72 KUNIT_EXPECT_GT(test, ret, 0);
73}
74
75static int drm_managed_test_init(struct kunit *test)
76{
77 struct managed_test_priv *priv;
78 struct device *dev;
79
80 priv = kunit_kzalloc(test, size: sizeof(*priv), GFP_KERNEL);
81 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
82 init_waitqueue_head(&priv->action_wq);
83
84 dev = drm_kunit_helper_alloc_device(test);
85 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
86
87 /*
88 * DRM device can't be embedded in priv, since priv->action_done needs
89 * to remain allocated beyond both parent device and drm_device
90 * lifetime.
91 */
92 priv->drm = __drm_kunit_helper_alloc_drm_device(test, dev, size: sizeof(*priv->drm), offset: 0,
93 features: DRIVER_MODESET);
94 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
95
96 test->priv = priv;
97
98 return 0;
99}
100
101static struct kunit_case drm_managed_tests[] = {
102 KUNIT_CASE(drm_test_managed_release_action),
103 KUNIT_CASE(drm_test_managed_run_action),
104 {}
105};
106
107static struct kunit_suite drm_managed_test_suite = {
108 .name = "drm_managed",
109 .init = drm_managed_test_init,
110 .test_cases = drm_managed_tests
111};
112
113kunit_test_suite(drm_managed_test_suite);
114
115MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
116MODULE_DESCRIPTION("KUnit DRM managed test suite");
117MODULE_LICENSE("GPL");
118

source code of linux/drivers/gpu/drm/tests/drm_managed_test.c