target/linux/bcm27xx/patches-6.1/950-0495-drm-tests-helpers-Make-sure-the-device-is-bound.patch

   1 From 51e89f803856386ebecef22453ab34907a393954 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Mon, 21 Nov 2022 13:18:29 +0100
   4 Subject: [PATCH] drm/tests: helpers: Make sure the device is bound
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 The device managed resources are freed when the device is detached, so
  10 it has to be bound in the first place.
  11
  12 Let's create a fake driver that we will bind to our fake device to
  13 benefit from the device managed cleanups in our tests.
  14
  15 Reviewed-by: Maíra Canal <mcanal@igalia.com>
  16 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  17 ---
  18  drivers/gpu/drm/tests/drm_kunit_helpers.c | 26 ++++++++++++++++++++++-
  19  1 file changed, 25 insertions(+), 1 deletion(-)
  20
  21 --- a/drivers/gpu/drm/tests/drm_kunit_helpers.c
  22 +++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c
  23 @@ -18,12 +18,32 @@ struct kunit_dev {
  24  static const struct drm_mode_config_funcs drm_mode_config_funcs = {
  25  };
  26
  27 +static int fake_probe(struct platform_device *pdev)
  28 +{
  29 +       return 0;
  30 +}
  31 +
  32 +static int fake_remove(struct platform_device *pdev)
  33 +{
  34 +       return 0;
  35 +}
  36 +
  37 +static struct platform_driver fake_platform_driver = {
  38 +       .probe  = fake_probe,
  39 +       .remove = fake_remove,
  40 +       .driver = {
  41 +               .name   = KUNIT_DEVICE_NAME,
  42 +       },
  43 +};
  44 +
  45  /**
  46   * drm_kunit_helper_alloc_device - Allocate a mock device for a KUnit test
  47   * @test: The test context object
  48   *
  49   * This allocates a fake struct &device to create a mock for a KUnit
  50 - * test.
  51 + * test. The device will also be bound to a fake driver. It will thus be
  52 + * able to leverage the usual infrastructure and most notably the
  53 + * device-managed resources just like a "real" device.
  54   *
  55   * Callers need to make sure drm_kunit_helper_free_device() on the
  56   * device when done.
  57 @@ -36,6 +56,9 @@ struct device *drm_kunit_helper_alloc_de
  58         struct platform_device *pdev;
  59         int ret;
  60
  61 +       ret = platform_driver_register(&fake_platform_driver);
  62 +       KUNIT_ASSERT_EQ(test, ret, 0);
  63 +
  64         pdev = platform_device_alloc(KUNIT_DEVICE_NAME, PLATFORM_DEVID_NONE);
  65         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pdev);
  66
  67 @@ -58,6 +81,7 @@ void drm_kunit_helper_free_device(struct
  68         struct platform_device *pdev = to_platform_device(dev);
  69
  70         platform_device_unregister(pdev);
  71 +       platform_driver_unregister(&fake_platform_driver);
  72  }
  73  EXPORT_SYMBOL_GPL(drm_kunit_helper_free_device);
  74