drm/tests: connector: Add tests for drmm_connector_hdmi_init

We just introduced a new initialization function for our connectors, so
let's build a kunit test suite for it as well.

Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-2-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>

drivers/gpu/drm/tests/drm_connector_test.c

@@ -172,6 +172,128 @@ static struct kunit_suite drmm_connector_init_test_suite = {
 	.test_cases = drmm_connector_init_tests,
 };
 
+/*
+ * Test that the registration of a bog standard connector works as
+ * expected and doesn't report any error.
+ */
+static void drm_test_connector_hdmi_init_valid(struct kunit *test)
+{
+	struct drm_connector_init_priv *priv = test->priv;
+	int ret;
+
+	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
+				       &dummy_funcs,
+				       DRM_MODE_CONNECTOR_HDMIA,
+				       &priv->ddc);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+}
+
+/*
+ * Test that the registration of a connector without a DDC adapter
+ * doesn't report any error.
+ */
+static void drm_test_connector_hdmi_init_null_ddc(struct kunit *test)
+{
+	struct drm_connector_init_priv *priv = test->priv;
+	int ret;
+
+	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
+				       &dummy_funcs,
+				       DRM_MODE_CONNECTOR_HDMIA,
+				       NULL);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+}
+
+/*
+ * Test that the registration of an HDMI connector with an HDMI
+ * connector type succeeds.
+ */
+static void drm_test_connector_hdmi_init_type_valid(struct kunit *test)
+{
+	struct drm_connector_init_priv *priv = test->priv;
+	unsigned int connector_type = *(unsigned int *)test->param_value;
+	int ret;
+
+	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
+				       &dummy_funcs,
+				       connector_type,
+				       &priv->ddc);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+}
+
+static const unsigned int drm_connector_hdmi_init_type_valid_tests[] = {
+	DRM_MODE_CONNECTOR_HDMIA,
+	DRM_MODE_CONNECTOR_HDMIB,
+};
+
+static void drm_connector_hdmi_init_type_desc(const unsigned int *type, char *desc)
+{
+	sprintf(desc, "%s", drm_get_connector_type_name(*type));
+}
+
+KUNIT_ARRAY_PARAM(drm_connector_hdmi_init_type_valid,
+		  drm_connector_hdmi_init_type_valid_tests,
+		  drm_connector_hdmi_init_type_desc);
+
+/*
+ * Test that the registration of an HDMI connector with an !HDMI
+ * connector type fails.
+ */
+static void drm_test_connector_hdmi_init_type_invalid(struct kunit *test)
+{
+	struct drm_connector_init_priv *priv = test->priv;
+	unsigned int connector_type = *(unsigned int *)test->param_value;
+	int ret;
+
+	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
+				       &dummy_funcs,
+				       connector_type,
+				       &priv->ddc);
+	KUNIT_EXPECT_LT(test, ret, 0);
+}
+
+static const unsigned int drm_connector_hdmi_init_type_invalid_tests[] = {
+	DRM_MODE_CONNECTOR_Unknown,
+	DRM_MODE_CONNECTOR_VGA,
+	DRM_MODE_CONNECTOR_DVII,
+	DRM_MODE_CONNECTOR_DVID,
+	DRM_MODE_CONNECTOR_DVIA,
+	DRM_MODE_CONNECTOR_Composite,
+	DRM_MODE_CONNECTOR_SVIDEO,
+	DRM_MODE_CONNECTOR_LVDS,
+	DRM_MODE_CONNECTOR_Component,
+	DRM_MODE_CONNECTOR_9PinDIN,
+	DRM_MODE_CONNECTOR_DisplayPort,
+	DRM_MODE_CONNECTOR_TV,
+	DRM_MODE_CONNECTOR_eDP,
+	DRM_MODE_CONNECTOR_VIRTUAL,
+	DRM_MODE_CONNECTOR_DSI,
+	DRM_MODE_CONNECTOR_DPI,
+	DRM_MODE_CONNECTOR_WRITEBACK,
+	DRM_MODE_CONNECTOR_SPI,
+	DRM_MODE_CONNECTOR_USB,
+};
+
+KUNIT_ARRAY_PARAM(drm_connector_hdmi_init_type_invalid,
+		  drm_connector_hdmi_init_type_invalid_tests,
+		  drm_connector_hdmi_init_type_desc);
+
+static struct kunit_case drmm_connector_hdmi_init_tests[] = {
+	KUNIT_CASE(drm_test_connector_hdmi_init_valid),
+	KUNIT_CASE(drm_test_connector_hdmi_init_null_ddc),
+	KUNIT_CASE_PARAM(drm_test_connector_hdmi_init_type_valid,
+			 drm_connector_hdmi_init_type_valid_gen_params),
+	KUNIT_CASE_PARAM(drm_test_connector_hdmi_init_type_invalid,
+			 drm_connector_hdmi_init_type_invalid_gen_params),
+	{ }
+};
+
+static struct kunit_suite drmm_connector_hdmi_init_test_suite = {
+	.name = "drmm_connector_hdmi_init",
+	.init = drm_test_connector_init,
+	.test_cases = drmm_connector_hdmi_init_tests,
+};
+
 struct drm_get_tv_mode_from_name_test {
 	const char *name;
 	enum drm_connector_tv_mode expected_mode;
@@ -236,6 +358,7 @@ static struct kunit_suite drm_get_tv_mode_from_name_test_suite = {
 };
 
 kunit_test_suites(
+	&drmm_connector_hdmi_init_test_suite,
 	&drmm_connector_init_test_suite,
 	&drm_get_tv_mode_from_name_test_suite
 );