drivers/gpu/drm/tests/drm_managed_test.c

   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
  14 struct managed_test_priv {
  15         struct drm_device *drm;
  16         bool action_done;
  17         wait_queue_head_t action_wq;
  18 };
  19
  20 static 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  */
  32 static 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(priv->drm, 0);
  41         KUNIT_ASSERT_EQ(test, ret, 0);
  42
  43         drmm_release_action(priv->drm, drm_action, 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(priv->drm);
  49         drm_kunit_helper_free_device(test, priv->drm->dev);
  50 }
  51
  52 /*
  53  * The test verifies that the release action is called automatically when the
  54  * device is released.
  55  */
  56 static 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(priv->drm, 0);
  65         KUNIT_ASSERT_EQ(test, ret, 0);
  66
  67         drm_dev_unregister(priv->drm);
  68         drm_kunit_helper_free_device(test, 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
  75 static 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, 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, sizeof(*priv->drm), 0,
  93                                                         DRIVER_MODESET);
  94         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
  95
  96         test->priv = priv;
  97
  98         return 0;
  99 }
 100
 101 static 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
 107 static 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
 113 kunit_test_suite(drm_managed_test_suite);
 114
 115 MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
 116 MODULE_LICENSE("GPL");