Add a basic KUnit test for the newly introduced drm_bridge_alloc().
Signed-off-by: Luca Ceresoli <luca.ceres...@bootlin.com>
---
Changed in v7:
- rebase on current drm-misc-next, which now has a drm_bridge_test.c file
- cleanup commit message
Changed in v6:
- update to new devm_drm_bridge_alloc() API
- remove drm_test_drm_bridge_put test, not straightforward to write with
the new API and the current notification mechanism
- do not allocate a drm_device: a bridge is allocated without one
- rename some identifiers for easier code reading
This patch was added in v5.
---
drivers/gpu/drm/tests/drm_bridge_test.c | 60 +++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/drivers/gpu/drm/tests/drm_bridge_test.c
b/drivers/gpu/drm/tests/drm_bridge_test.c
index
ff88ec2e911c9cc9a718483f09d4c764f45f991a..87fb64744b67f0780457a546aba77ba945a0ce67
100644
--- a/drivers/gpu/drm/tests/drm_bridge_test.c
+++ b/drivers/gpu/drm/tests/drm_bridge_test.c
@@ -8,6 +8,7 @@
#include <drm/drm_bridge_helper.h>
#include <drm/drm_kunit_helpers.h>
+#include <kunit/device.h>
#include <kunit/test.h>
struct drm_bridge_init_priv {
@@ -407,11 +408,70 @@ static struct kunit_suite
drm_bridge_helper_reset_crtc_test_suite = {
.test_cases = drm_bridge_helper_reset_crtc_tests,
};
+struct drm_bridge_alloc_test_ctx {
+ struct device *dev;
+};
+
+/*
+ * Mimick the typical struct defined by a bridge driver, which embeds a
+ * bridge plus other fields.
+ */
+struct dummy_drm_bridge {
+ int dummy; // ensure we test non-zero @bridge offset
+ struct drm_bridge bridge;
+};
+
+static const struct drm_bridge_funcs drm_bridge_dummy_funcs = {
+};
+
+static int drm_test_bridge_alloc_init(struct kunit *test)
+{
+ struct drm_bridge_alloc_test_ctx *ctx;
+
+ ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+
+ ctx->dev = kunit_device_register(test, "drm-bridge-dev");
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->dev);
+
+ test->priv = ctx;
+
+ return 0;
+}
+
+/*
+ * Test that the allocation and initialization of a bridge works as
+ * expected and doesn't report any error.
+ */
+static void drm_test_drm_bridge_alloc(struct kunit *test)
+{
+ struct drm_bridge_alloc_test_ctx *ctx = test->priv;
+ struct dummy_drm_bridge *dummy;
+
+ dummy = devm_drm_bridge_alloc(ctx->dev, struct dummy_drm_bridge, bridge,
+ &drm_bridge_dummy_funcs);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dummy);
+}
+
+static struct kunit_case drm_bridge_alloc_tests[] = {
+ KUNIT_CASE(drm_test_drm_bridge_alloc),
+ { }
+};
+
+static struct kunit_suite drm_bridge_alloc_test_suite = {
+ .name = "drm_bridge_alloc",
+ .init = drm_test_bridge_alloc_init,
+ .test_cases = drm_bridge_alloc_tests,
+};
+
kunit_test_suites(
&drm_bridge_get_current_state_test_suite,
&drm_bridge_helper_reset_crtc_test_suite,
+ &drm_bridge_alloc_test_suite,
);
MODULE_AUTHOR("Maxime Ripard <mrip...@kernel.org>");
+MODULE_AUTHOR("Luca Ceresoli <luca.ceres...@bootlin.com>");
+
MODULE_DESCRIPTION("Kunit test for drm_bridge functions");
MODULE_LICENSE("GPL");
--
2.49.0
