drivers/gpu/drm/tests/drm_client_modeset_test.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2022 Maxime Ripard <mripard@kernel.org>
   4  */
   5
   6 #include <kunit/test.h>
   7
   8 #include <drm/drm_connector.h>
   9 #include <drm/drm_edid.h>
  10 #include <drm/drm_drv.h>
  11 #include <drm/drm_kunit_helpers.h>
  12 #include <drm/drm_modes.h>
  13 #include <drm/drm_modeset_helper_vtables.h>
  14 #include <drm/drm_probe_helper.h>
  15
  16 struct drm_client_modeset_test_priv {
  17         struct drm_device *drm;
  18         struct device *dev;
  19         struct drm_connector connector;
  20 };
  21
  22 static int drm_client_modeset_connector_get_modes(struct drm_connector *connector)
  23 {
  24         struct drm_display_mode *mode;
  25         int count;
  26
  27         count = drm_add_modes_noedid(connector, 1920, 1200);
  28
  29         mode = drm_mode_analog_ntsc_480i(connector->dev);
  30         if (!mode)
  31                 return count;
  32
  33         drm_mode_probed_add(connector, mode);
  34         count += 1;
  35
  36         mode = drm_mode_analog_pal_576i(connector->dev);
  37         if (!mode)
  38                 return count;
  39
  40         drm_mode_probed_add(connector, mode);
  41         count += 1;
  42
  43         return count;
  44 }
  45
  46 static const struct drm_connector_helper_funcs drm_client_modeset_connector_helper_funcs = {
  47         .get_modes = drm_client_modeset_connector_get_modes,
  48 };
  49
  50 static const struct drm_connector_funcs drm_client_modeset_connector_funcs = {
  51 };
  52
  53 static int drm_client_modeset_test_init(struct kunit *test)
  54 {
  55         struct drm_client_modeset_test_priv *priv;
  56         int ret;
  57
  58         priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
  59         KUNIT_ASSERT_NOT_NULL(test, priv);
  60
  61         test->priv = priv;
  62
  63         priv->dev = drm_kunit_helper_alloc_device(test);
  64         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);
  65
  66         priv->drm = __drm_kunit_helper_alloc_drm_device(test, priv->dev,
  67                                                         sizeof(*priv->drm), 0,
  68                                                         DRIVER_MODESET);
  69         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
  70
  71         ret = drmm_connector_init(priv->drm, &priv->connector,
  72                                   &drm_client_modeset_connector_funcs,
  73                                   DRM_MODE_CONNECTOR_Unknown,
  74                                   NULL);
  75         KUNIT_ASSERT_EQ(test, ret, 0);
  76
  77         drm_connector_helper_add(&priv->connector, &drm_client_modeset_connector_helper_funcs);
  78
  79         priv->connector.interlace_allowed = true;
  80         priv->connector.doublescan_allowed = true;
  81
  82         return 0;
  83 }
  84
  85 static void drm_test_pick_cmdline_res_1920_1080_60(struct kunit *test)
  86 {
  87         struct drm_client_modeset_test_priv *priv = test->priv;
  88         struct drm_device *drm = priv->drm;
  89         struct drm_connector *connector = &priv->connector;
  90         struct drm_cmdline_mode *cmdline_mode = &connector->cmdline_mode;
  91         struct drm_display_mode *expected_mode, *mode;
  92         const char *cmdline = "1920x1080@60";
  93         int ret;
  94
  95         expected_mode = drm_mode_find_dmt(priv->drm, 1920, 1080, 60, false);
  96         KUNIT_ASSERT_NOT_NULL(test, expected_mode);
  97
  98         KUNIT_ASSERT_TRUE(test,
  99                           drm_mode_parse_command_line_for_connector(cmdline,
 100                                                                     connector,
 101                                                                     cmdline_mode));
 102
 103         mutex_lock(&drm->mode_config.mutex);
 104         ret = drm_helper_probe_single_connector_modes(connector, 1920, 1080);
 105         mutex_unlock(&drm->mode_config.mutex);
 106         KUNIT_ASSERT_GT(test, ret, 0);
 107
 108         mode = drm_connector_pick_cmdline_mode(connector);
 109         KUNIT_ASSERT_NOT_NULL(test, mode);
 110
 111         KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected_mode, mode));
 112 }
 113
 114 struct drm_connector_pick_cmdline_mode_test {
 115         const char *cmdline;
 116         struct drm_display_mode *(*func)(struct drm_device *drm);
 117 };
 118
 119 #define TEST_CMDLINE(_cmdline, _fn)             \
 120         {                                       \
 121                 .cmdline = _cmdline,            \
 122                 .func = _fn,                    \
 123         }
 124
 125 static void drm_test_pick_cmdline_named(struct kunit *test)
 126 {
 127         const struct drm_connector_pick_cmdline_mode_test *params = test->param_value;
 128         struct drm_client_modeset_test_priv *priv = test->priv;
 129         struct drm_device *drm = priv->drm;
 130         struct drm_connector *connector = &priv->connector;
 131         struct drm_cmdline_mode *cmdline_mode = &connector->cmdline_mode;
 132         const struct drm_display_mode *expected_mode, *mode;
 133         const char *cmdline = params->cmdline;
 134         int ret;
 135
 136         KUNIT_ASSERT_TRUE(test,
 137                           drm_mode_parse_command_line_for_connector(cmdline,
 138                                                                     connector,
 139                                                                     cmdline_mode));
 140
 141         mutex_lock(&drm->mode_config.mutex);
 142         ret = drm_helper_probe_single_connector_modes(connector, 1920, 1080);
 143         mutex_unlock(&drm->mode_config.mutex);
 144         KUNIT_ASSERT_GT(test, ret, 0);
 145
 146         mode = drm_connector_pick_cmdline_mode(connector);
 147         KUNIT_ASSERT_NOT_NULL(test, mode);
 148
 149         expected_mode = params->func(drm);
 150         KUNIT_ASSERT_NOT_NULL(test, expected_mode);
 151
 152         KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected_mode, mode));
 153 }
 154
 155 static const
 156 struct drm_connector_pick_cmdline_mode_test drm_connector_pick_cmdline_mode_tests[] = {
 157         TEST_CMDLINE("NTSC", drm_mode_analog_ntsc_480i),
 158         TEST_CMDLINE("NTSC-J", drm_mode_analog_ntsc_480i),
 159         TEST_CMDLINE("PAL", drm_mode_analog_pal_576i),
 160         TEST_CMDLINE("PAL-M", drm_mode_analog_ntsc_480i),
 161 };
 162
 163 static void
 164 drm_connector_pick_cmdline_mode_desc(const struct drm_connector_pick_cmdline_mode_test *t,
 165                                      char *desc)
 166 {
 167         sprintf(desc, "%s", t->cmdline);
 168 }
 169
 170 KUNIT_ARRAY_PARAM(drm_connector_pick_cmdline_mode,
 171                   drm_connector_pick_cmdline_mode_tests,
 172                   drm_connector_pick_cmdline_mode_desc);
 173
 174 static struct kunit_case drm_test_pick_cmdline_tests[] = {
 175         KUNIT_CASE(drm_test_pick_cmdline_res_1920_1080_60),
 176         KUNIT_CASE_PARAM(drm_test_pick_cmdline_named,
 177                          drm_connector_pick_cmdline_mode_gen_params),
 178         {}
 179 };
 180
 181 static struct kunit_suite drm_test_pick_cmdline_test_suite = {
 182         .name = "drm_test_pick_cmdline",
 183         .init = drm_client_modeset_test_init,
 184         .test_cases = drm_test_pick_cmdline_tests
 185 };
 186
 187 kunit_test_suite(drm_test_pick_cmdline_test_suite);
 188
 189 /*
 190  * This file is included directly by drm_client_modeset.c so we can't
 191  * use any MODULE_* macro here.
 192  */