[PATCH v7 12/36] drm/tests: Add output formats tests

Maxime Ripard
2024-02-22T18:24:35Z

Now that we track the HDMI output format as part of the connector state,
let's add a few tests to make sure it works as expected.

Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
---
.../gpu/drm/tests/drm_atomic_state_helper_test.c | 32 +++++++
drivers/gpu/drm/tests/drm_connector_test.c | 99 +++++++++++++++++++++-
2 files changed, 130 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
index a129ea5f014c..1c3dd8a98fb0 100644
--- a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c
@@ -347,6 +347,15 @@ static void drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test)
static struct kunit_case drm_atomic_helper_connector_hdmi_check_tests[] = {
KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_changed),
KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_not_changed),
+ /*
+ * TODO: We should have tests to check that a change in the
+ * format triggers a CRTC mode change just like we do for the
+ * RGB Quantization and BPC.
+ *
+ * However, we don't have any way to control which format gets
+ * picked up aside from changing the BPC or mode which would
+ * already trigger a mode change.
+ */
{ }
};

@@ -427,10 +436,33 @@ static void drm_test_check_bpc_12_value(struct kunit *test)
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_bpc, 0);
}

+/*
+ * Test that the value of the output format property out of reset is set
+ * to RGB, even if the driver supports more than that.
+ */
+static void drm_test_check_format_value(struct kunit *test)
+{
+ struct drm_atomic_helper_connector_hdmi_priv *priv;
+ struct drm_connector_state *conn_state;
+ struct drm_connector *conn;
+
+ priv = drm_atomic_helper_connector_hdmi_init(test,
+ BIT(HDMI_COLORSPACE_RGB) |
+ BIT(HDMI_COLORSPACE_YUV422) |
+ BIT(HDMI_COLORSPACE_YUV444),
+ 8);
+ KUNIT_ASSERT_NOT_NULL(test, priv);
+
+ conn = &priv->connector;
+ conn_state = conn->state;
+ KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
+}
+
static struct kunit_case drm_atomic_helper_connector_hdmi_reset_tests[] = {
KUNIT_CASE(drm_test_check_bpc_8_value),
KUNIT_CASE(drm_test_check_bpc_10_value),
KUNIT_CASE(drm_test_check_bpc_12_value),
+ KUNIT_CASE(drm_test_check_format_value),
{ }
};

diff --git a/drivers/gpu/drm/tests/drm_connector_test.c b/drivers/gpu/drm/tests/drm_connector_test.c
index a9a57cb23235..5bff67fbed87 100644
--- a/drivers/gpu/drm/tests/drm_connector_test.c
+++ b/drivers/gpu/drm/tests/drm_connector_test.c
@@ -348,6 +348,42 @@ static void drm_test_connector_hdmi_init_bpc_12(struct kunit *test)
KUNIT_EXPECT_NOT_NULL(test, drm_mode_obj_find_prop_id(&connector->base, prop->base.id));
}

+/*
+ * Test that the registration of an HDMI connector with no supported
+ * format fails.
+ */
+static void drm_test_connector_hdmi_init_formats_empty(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,
+ 0,
+ 8);
+ KUNIT_EXPECT_LT(test, ret, 0);
+}
+
+/*
+ * Test that the registration of an HDMI connector not listing RGB as a
+ * supported format fails.
+ */
+static void drm_test_connector_hdmi_init_formats_no_rgb(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,
+ BIT(HDMI_COLORSPACE_YUV422),
+ 8);
+ KUNIT_EXPECT_LT(test, ret, 0);
+}
+
/*
* Test that the registration of an HDMI connector with an HDMI
* connector type succeeds.
@@ -433,6 +469,8 @@ static struct kunit_case drmm_connector_hdmi_init_tests[] = {
KUNIT_CASE(drm_test_connector_hdmi_init_bpc_12),
KUNIT_CASE(drm_test_connector_hdmi_init_bpc_invalid),
KUNIT_CASE(drm_test_connector_hdmi_init_bpc_null),
+ KUNIT_CASE(drm_test_connector_hdmi_init_formats_empty),
+ KUNIT_CASE(drm_test_connector_hdmi_init_formats_no_rgb),
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),
@@ -510,10 +548,69 @@ static struct kunit_suite drm_get_tv_mode_from_name_test_suite = {
.test_cases = drm_get_tv_mode_from_name_tests,
};

+struct drm_hdmi_connector_get_output_format_name_test {
+ unsigned int kind;
+ const char *expected_name;
+};
+
+#define OUTPUT_FORMAT_TEST(_kind, _name) \
+ { \
+ .kind = _kind, \
+ .expected_name = _name, \
+ }
+
+static void drm_test_drm_hdmi_connector_get_output_format_name(struct kunit *test)
+{
+ const struct drm_hdmi_connector_get_output_format_name_test *params =
+ test->param_value;
+
+ KUNIT_EXPECT_STREQ(test,
+ drm_hdmi_connector_get_output_format_name(params->kind),
+ params->expected_name);
+}
+
+static const
+struct drm_hdmi_connector_get_output_format_name_test
+drm_hdmi_connector_get_output_format_name_valid_tests[] = {
+ OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_RGB, "RGB"),
+ OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_YUV420, "YUV 4:2:0"),
+ OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_YUV422, "YUV 4:2:2"),
+ OUTPUT_FORMAT_TEST(HDMI_COLORSPACE_YUV444, "YUV 4:4:4"),
+};
+
+static void
+drm_hdmi_connector_get_output_format_name_valid_desc(const struct drm_hdmi_connector_get_output_format_name_test *t,
+ char *desc)
+{
+ sprintf(desc, "%s", t->expected_name);
+}
+
+KUNIT_ARRAY_PARAM(drm_hdmi_connector_get_output_format_name_valid,
+ drm_hdmi_connector_get_output_format_name_valid_tests,
+ drm_hdmi_connector_get_output_format_name_valid_desc);
+
+static void drm_test_drm_hdmi_connector_get_output_format_name_invalid(struct kunit *test)
+{
+ KUNIT_EXPECT_NULL(test, drm_hdmi_connector_get_output_format_name(4));
+};
+
+static struct kunit_case drm_hdmi_connector_get_output_format_name_tests[] = {
+ KUNIT_CASE_PARAM(drm_test_drm_hdmi_connector_get_output_format_name,
+ drm_hdmi_connector_get_output_format_name_valid_gen_params),
+ KUNIT_CASE(drm_test_drm_hdmi_connector_get_output_format_name_invalid),
+ { }
+};
+
+static struct kunit_suite drm_hdmi_connector_get_output_format_name_test_suite = {
+ .name = "drm_hdmi_connector_get_output_format_name",
+ .test_cases = drm_hdmi_connector_get_output_format_name_tests,
+};
+
kunit_test_suites(
&drmm_connector_hdmi_init_test_suite,
&drmm_connector_init_test_suite,
- &drm_get_tv_mode_from_name_test_suite
+ &drm_get_tv_mode_from_name_test_suite,
+ &drm_hdmi_connector_get_output_format_name_test_suite
);

MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");

--
2.43.2