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drm/tests: Add a test for DRM managed actions

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DRM-managed actions are supposed to be ran whenever the device is
released. Let's introduce a basic unit test to make sure it happens.

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Maíra Canal <mcanal@igalia.com>
Link: https://lore.kernel.org/r/20221123-rpi-kunit-tests-v3-12-4615a663a84a@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Maxime Ripard 2022-12-01 16:11:43 +01:00
parent d987803107
commit 4adf59449f
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GPG Key ID: E3EF0D6F671851C5
2 changed files with 72 additions and 0 deletions
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1
drivers/gpu/drm/tests/Makefile
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@ -12,6 +12,7 @@ obj-$(CONFIG_DRM_KUNIT_TEST) += \
drm_format_helper_test.o \
drm_format_test.o \
drm_framebuffer_test.o \
drm_managed_test.o \
drm_mm_test.o \
drm_modes_test.o \
drm_plane_helper_test.o \

71
drivers/gpu/drm/tests/drm_managed_test.c Normal file
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@ -0,0 +1,71 @@
// SPDX-License-Identifier: GPL-2.0
#include <drm/drm_drv.h>
#include <drm/drm_kunit_helpers.h>
#include <drm/drm_managed.h>
#include <kunit/resource.h>
#include <linux/device.h>
/* Ought to be enough for anybody */
#define TEST_TIMEOUT_MS 100
struct managed_test_priv {
bool action_done;
wait_queue_head_t action_wq;
};
static void drm_action(struct drm_device *drm, void *ptr)
{
struct managed_test_priv *priv = ptr;
priv->action_done = true;
wake_up_interruptible(&priv->action_wq);
}
static void drm_test_managed_run_action(struct kunit *test)
{
struct managed_test_priv *priv;
struct drm_device *drm;
struct device *dev;
int ret;
priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
init_waitqueue_head(&priv->action_wq);
dev = drm_kunit_helper_alloc_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
drm = __drm_kunit_helper_alloc_drm_device(test, dev, sizeof(*drm), 0, DRIVER_MODESET);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, drm);
ret = drmm_add_action_or_reset(drm, drm_action, priv);
KUNIT_EXPECT_EQ(test, ret, 0);
ret = drm_dev_register(drm, 0);
KUNIT_ASSERT_EQ(test, ret, 0);
drm_dev_unregister(drm);
drm_kunit_helper_free_device(test, dev);
ret = wait_event_interruptible_timeout(priv->action_wq, priv->action_done,
msecs_to_jiffies(TEST_TIMEOUT_MS));
KUNIT_EXPECT_GT(test, ret, 0);
}
static struct kunit_case drm_managed_tests[] = {
KUNIT_CASE(drm_test_managed_run_action),
{}
};
static struct kunit_suite drm_managed_test_suite = {
.name = "drm-test-managed",
.test_cases = drm_managed_tests
};
kunit_test_suite(drm_managed_test_suite);
MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
MODULE_LICENSE("GPL");