1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Kunit test for drm_modes functions
4 */
5
6#include <drm/drm_drv.h>
7#include <drm/drm_kunit_helpers.h>
8#include <drm/drm_modes.h>
9
10#include <kunit/test.h>
11
12#include <linux/units.h>
13
14struct drm_test_modes_priv {
15 struct drm_device *drm;
16 struct device *dev;
17};
18
19static int drm_test_modes_init(struct kunit *test)
20{
21 struct drm_test_modes_priv *priv;
22
23 priv = kunit_kzalloc(test, size: sizeof(*priv), GFP_KERNEL);
24 KUNIT_ASSERT_NOT_NULL(test, priv);
25
26 priv->dev = drm_kunit_helper_alloc_device(test);
27 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);
28
29 priv->drm = __drm_kunit_helper_alloc_drm_device(test, dev: priv->dev,
30 size: sizeof(*priv->drm), offset: 0,
31 features: DRIVER_MODESET);
32 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
33
34 test->priv = priv;
35
36 return 0;
37}
38
39static void drm_test_modes_analog_tv_ntsc_480i(struct kunit *test)
40{
41 struct drm_test_modes_priv *priv = test->priv;
42 struct drm_display_mode *mode;
43 int ret;
44
45 mode = drm_analog_tv_mode(dev: priv->drm,
46 mode: DRM_MODE_TV_MODE_NTSC,
47 pixel_clock_hz: 13500 * HZ_PER_KHZ, hdisplay: 720, vdisplay: 480,
48 interlace: true);
49 KUNIT_ASSERT_NOT_NULL(test, mode);
50
51 ret = drm_kunit_add_mode_destroy_action(test, mode);
52 KUNIT_ASSERT_EQ(test, ret, 0);
53
54 KUNIT_EXPECT_EQ(test, drm_mode_vrefresh(mode), 60);
55 KUNIT_EXPECT_EQ(test, mode->hdisplay, 720);
56
57 /* BT.601 defines hsync_start at 736 for 480i */
58 KUNIT_EXPECT_EQ(test, mode->hsync_start, 736);
59
60 /*
61 * The NTSC standard expects a line to take 63.556us. With a
62 * pixel clock of 13.5 MHz, a pixel takes around 74ns, so we
63 * need to have 63556ns / 74ns = 858.
64 *
65 * This is also mandated by BT.601.
66 */
67 KUNIT_EXPECT_EQ(test, mode->htotal, 858);
68
69 KUNIT_EXPECT_EQ(test, mode->vdisplay, 480);
70 KUNIT_EXPECT_EQ(test, mode->vtotal, 525);
71}
72
73static void drm_test_modes_analog_tv_ntsc_480i_inlined(struct kunit *test)
74{
75 struct drm_test_modes_priv *priv = test->priv;
76 struct drm_display_mode *expected, *mode;
77 int ret;
78
79 expected = drm_analog_tv_mode(dev: priv->drm,
80 mode: DRM_MODE_TV_MODE_NTSC,
81 pixel_clock_hz: 13500 * HZ_PER_KHZ, hdisplay: 720, vdisplay: 480,
82 interlace: true);
83 KUNIT_ASSERT_NOT_NULL(test, expected);
84
85 ret = drm_kunit_add_mode_destroy_action(test, mode: expected);
86 KUNIT_ASSERT_EQ(test, ret, 0);
87
88 mode = drm_mode_analog_ntsc_480i(dev: priv->drm);
89 KUNIT_ASSERT_NOT_NULL(test, mode);
90
91 ret = drm_kunit_add_mode_destroy_action(test, mode);
92 KUNIT_ASSERT_EQ(test, ret, 0);
93
94 KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected, mode));
95}
96
97static void drm_test_modes_analog_tv_pal_576i(struct kunit *test)
98{
99 struct drm_test_modes_priv *priv = test->priv;
100 struct drm_display_mode *mode;
101 int ret;
102
103 mode = drm_analog_tv_mode(dev: priv->drm,
104 mode: DRM_MODE_TV_MODE_PAL,
105 pixel_clock_hz: 13500 * HZ_PER_KHZ, hdisplay: 720, vdisplay: 576,
106 interlace: true);
107 KUNIT_ASSERT_NOT_NULL(test, mode);
108
109 ret = drm_kunit_add_mode_destroy_action(test, mode);
110 KUNIT_ASSERT_EQ(test, ret, 0);
111
112 KUNIT_EXPECT_EQ(test, drm_mode_vrefresh(mode), 50);
113 KUNIT_EXPECT_EQ(test, mode->hdisplay, 720);
114
115 /* BT.601 defines hsync_start at 732 for 576i */
116 KUNIT_EXPECT_EQ(test, mode->hsync_start, 732);
117
118 /*
119 * The PAL standard expects a line to take 64us. With a pixel
120 * clock of 13.5 MHz, a pixel takes around 74ns, so we need to
121 * have 64000ns / 74ns = 864.
122 *
123 * This is also mandated by BT.601.
124 */
125 KUNIT_EXPECT_EQ(test, mode->htotal, 864);
126
127 KUNIT_EXPECT_EQ(test, mode->vdisplay, 576);
128 KUNIT_EXPECT_EQ(test, mode->vtotal, 625);
129}
130
131static void drm_test_modes_analog_tv_pal_576i_inlined(struct kunit *test)
132{
133 struct drm_test_modes_priv *priv = test->priv;
134 struct drm_display_mode *expected, *mode;
135 int ret;
136
137 expected = drm_analog_tv_mode(dev: priv->drm,
138 mode: DRM_MODE_TV_MODE_PAL,
139 pixel_clock_hz: 13500 * HZ_PER_KHZ, hdisplay: 720, vdisplay: 576,
140 interlace: true);
141 KUNIT_ASSERT_NOT_NULL(test, expected);
142
143 ret = drm_kunit_add_mode_destroy_action(test, mode: expected);
144 KUNIT_ASSERT_EQ(test, ret, 0);
145
146 mode = drm_mode_analog_pal_576i(dev: priv->drm);
147 KUNIT_ASSERT_NOT_NULL(test, mode);
148
149 ret = drm_kunit_add_mode_destroy_action(test, mode);
150 KUNIT_ASSERT_EQ(test, ret, 0);
151
152 KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected, mode));
153}
154
155static void drm_test_modes_analog_tv_mono_576i(struct kunit *test)
156{
157 struct drm_test_modes_priv *priv = test->priv;
158 struct drm_display_mode *mode;
159 int ret;
160
161 mode = drm_analog_tv_mode(dev: priv->drm,
162 mode: DRM_MODE_TV_MODE_MONOCHROME,
163 pixel_clock_hz: 13500 * HZ_PER_KHZ, hdisplay: 720, vdisplay: 576,
164 interlace: true);
165 KUNIT_ASSERT_NOT_NULL(test, mode);
166
167 ret = drm_kunit_add_mode_destroy_action(test, mode);
168 KUNIT_ASSERT_EQ(test, ret, 0);
169
170 KUNIT_EXPECT_EQ(test, drm_mode_vrefresh(mode), 50);
171 KUNIT_EXPECT_EQ(test, mode->hdisplay, 720);
172
173 /* BT.601 defines hsync_start at 732 for 576i */
174 KUNIT_EXPECT_EQ(test, mode->hsync_start, 732);
175
176 /*
177 * The PAL standard expects a line to take 64us. With a pixel
178 * clock of 13.5 MHz, a pixel takes around 74ns, so we need to
179 * have 64000ns / 74ns = 864.
180 *
181 * This is also mandated by BT.601.
182 */
183 KUNIT_EXPECT_EQ(test, mode->htotal, 864);
184
185 KUNIT_EXPECT_EQ(test, mode->vdisplay, 576);
186 KUNIT_EXPECT_EQ(test, mode->vtotal, 625);
187}
188
189static struct kunit_case drm_modes_analog_tv_tests[] = {
190 KUNIT_CASE(drm_test_modes_analog_tv_mono_576i),
191 KUNIT_CASE(drm_test_modes_analog_tv_ntsc_480i),
192 KUNIT_CASE(drm_test_modes_analog_tv_ntsc_480i_inlined),
193 KUNIT_CASE(drm_test_modes_analog_tv_pal_576i),
194 KUNIT_CASE(drm_test_modes_analog_tv_pal_576i_inlined),
195 { }
196};
197
198static struct kunit_suite drm_modes_analog_tv_test_suite = {
199 .name = "drm_modes_analog_tv",
200 .init = drm_test_modes_init,
201 .test_cases = drm_modes_analog_tv_tests,
202};
203
204kunit_test_suite(drm_modes_analog_tv_test_suite);
205
206MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
207MODULE_DESCRIPTION("Kunit test for drm_modes functions");
208MODULE_LICENSE("GPL");
209

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