1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Kunit test for drm_atomic functions
4 */
5#include <drm/drm_atomic.h>
6#include <drm/drm_atomic_state_helper.h>
7#include <drm/drm_atomic_uapi.h>
8#include <drm/drm_encoder.h>
9#include <drm/drm_kunit_helpers.h>
10#include <drm/drm_modeset_helper_vtables.h>
11
12#include <kunit/test.h>
13
14struct drm_atomic_test_priv {
15 struct drm_device drm;
16 struct drm_plane *plane;
17 struct drm_crtc *crtc;
18 struct drm_encoder encoder;
19 struct drm_connector connector;
20};
21
22static const struct drm_connector_helper_funcs drm_atomic_init_connector_helper_funcs = {
23};
24
25static const struct drm_connector_funcs drm_atomic_init_connector_funcs = {
26 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
27 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
28 .reset = drm_atomic_helper_connector_reset,
29};
30
31static struct drm_atomic_test_priv *create_device(struct kunit *test)
32{
33 struct drm_atomic_test_priv *priv;
34 struct drm_connector *connector;
35 struct drm_encoder *enc;
36 struct drm_device *drm;
37 struct drm_plane *plane;
38 struct drm_crtc *crtc;
39 struct device *dev;
40 int ret;
41
42 dev = drm_kunit_helper_alloc_device(test);
43 if (IS_ERR(ptr: dev))
44 return ERR_CAST(ptr: dev);
45
46 priv = drm_kunit_helper_alloc_drm_device(test, dev,
47 struct drm_atomic_test_priv, drm,
48 DRIVER_MODESET | DRIVER_ATOMIC);
49 if (IS_ERR(ptr: priv))
50 return ERR_CAST(ptr: priv);
51
52 drm = &priv->drm;
53 plane = drm_kunit_helper_create_primary_plane(test, drm,
54 NULL,
55 NULL,
56 NULL, num_formats: 0,
57 NULL);
58 if (IS_ERR(ptr: plane))
59 return ERR_CAST(ptr: plane);
60 priv->plane = plane;
61
62 crtc = drm_kunit_helper_create_crtc(test, drm,
63 primary: plane, NULL,
64 NULL,
65 NULL);
66 if (IS_ERR(ptr: crtc))
67 return ERR_CAST(ptr: crtc);
68 priv->crtc = crtc;
69
70 enc = &priv->encoder;
71 ret = drmm_encoder_init(dev: drm, encoder: enc, NULL, DRM_MODE_ENCODER_TMDS, NULL);
72 if (ret)
73 return ERR_PTR(error: ret);
74
75 enc->possible_crtcs = drm_crtc_mask(crtc);
76
77 connector = &priv->connector;
78 ret = drmm_connector_init(dev: drm, connector,
79 funcs: &drm_atomic_init_connector_funcs,
80 DRM_MODE_CONNECTOR_VIRTUAL,
81 NULL);
82 if (ret)
83 return ERR_PTR(error: ret);
84
85 drm_connector_helper_add(connector, funcs: &drm_atomic_init_connector_helper_funcs);
86
87 drm_connector_attach_encoder(connector, encoder: enc);
88
89 drm_mode_config_reset(dev: drm);
90
91 return priv;
92}
93
94static void drm_test_drm_atomic_get_connector_for_encoder(struct kunit *test)
95{
96 struct drm_modeset_acquire_ctx ctx;
97 struct drm_atomic_test_priv *priv;
98 struct drm_display_mode *mode;
99 struct drm_connector *curr_connector;
100 int ret;
101
102 priv = create_device(test);
103 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
104
105 mode = drm_kunit_display_mode_from_cea_vic(test, dev: &priv->drm, video_code: 16);
106 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, mode);
107
108 drm_modeset_acquire_init(ctx: &ctx, flags: 0);
109
110retry_enable:
111 ret = drm_kunit_helper_enable_crtc_connector(test, drm: &priv->drm,
112 crtc: priv->crtc, connector: &priv->connector,
113 mode, ctx: &ctx);
114 if (ret == -EDEADLK) {
115 drm_modeset_backoff(ctx: &ctx);
116 goto retry_enable;
117 }
118 KUNIT_ASSERT_EQ(test, ret, 0);
119
120 drm_modeset_drop_locks(ctx: &ctx);
121 drm_modeset_acquire_fini(ctx: &ctx);
122
123 drm_modeset_acquire_init(ctx: &ctx, flags: 0);
124
125retry_conn:
126 curr_connector = drm_atomic_get_connector_for_encoder(encoder: &priv->encoder,
127 ctx: &ctx);
128 if (PTR_ERR(ptr: curr_connector) == -EDEADLK) {
129 drm_modeset_backoff(ctx: &ctx);
130 goto retry_conn;
131 }
132 KUNIT_EXPECT_PTR_EQ(test, curr_connector, &priv->connector);
133
134 drm_modeset_drop_locks(ctx: &ctx);
135 drm_modeset_acquire_fini(ctx: &ctx);
136}
137
138static struct kunit_case drm_atomic_get_connector_for_encoder_tests[] = {
139 KUNIT_CASE(drm_test_drm_atomic_get_connector_for_encoder),
140 { }
141};
142
143
144static struct kunit_suite drm_atomic_get_connector_for_encoder_test_suite = {
145 .name = "drm_test_atomic_get_connector_for_encoder",
146 .test_cases = drm_atomic_get_connector_for_encoder_tests,
147};
148
149kunit_test_suite(drm_atomic_get_connector_for_encoder_test_suite);
150
151MODULE_AUTHOR("Maxime Ripard <mripard@kernel.org>");
152MODULE_DESCRIPTION("Kunit test for drm_atomic functions");
153MODULE_LICENSE("GPL");
154

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