Following up a fixed bug in drm_atomic_helper_connector_hdmi_check(),
discovered while unloading a DRM module, add a test to make sure the
helper will not exhibit any abnormal behaviour for use cases that
involve shutting down the connector's CRTC.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 76 ++++++++++++++++++++++
1 file changed, 76 insertions(+)
diff --git a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
index c3b693bb966f1f8b04066d19f520bfa4bf11c23d..e6e79da200c4e81699c6e159a1bb2725004baf96 100644
--- a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
@@ -1568,6 +1568,81 @@ static void drm_test_check_output_bpc_format_display_8bpc_only(struct kunit *tes
KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB);
}
+/*
+ * Test that if we deactivate connector's CRTC, we trigger a mode change
+ * on that CRTC, along with setting {connectors|active}_changed.
+ */
+static void drm_test_check_crtc_deactivate_mode_changed(struct kunit *test)
+{
+ struct drm_atomic_helper_connector_hdmi_priv *priv;
+ struct drm_modeset_acquire_ctx *ctx;
+ struct drm_connector_state *old_conn_state;
+ struct drm_connector_state *new_conn_state;
+ struct drm_crtc_state *old_crtc_state;
+ struct drm_crtc_state *new_crtc_state;
+ struct drm_atomic_state *state;
+ struct drm_display_mode *preferred;
+ struct drm_connector *conn;
+ struct drm_device *drm;
+ struct drm_crtc *crtc;
+ int ret;
+
+ priv = drm_kunit_helper_connector_hdmi_init(test,
+ BIT(HDMI_COLORSPACE_RGB),
+ 8);
+ KUNIT_ASSERT_NOT_NULL(test, priv);
+
+ conn = &priv->connector;
+ KUNIT_ASSERT_TRUE(test, conn->display_info.is_hdmi);
+
+ ctx = drm_kunit_helper_acquire_ctx_alloc(test);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
+
+ preferred = find_preferred_mode(conn);
+ KUNIT_ASSERT_NOT_NULL(test, preferred);
+
+ drm = &priv->drm;
+ crtc = priv->crtc;
+ ret = light_up_connector(test, drm, crtc, conn, preferred, ctx);
+ KUNIT_ASSERT_EQ(test, ret, 0);
+
+ state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state);
+
+ new_conn_state = drm_atomic_get_connector_state(state, conn);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state);
+
+ old_conn_state = drm_atomic_get_old_connector_state(state, conn);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_conn_state);
+
+ new_crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_crtc_state);
+
+ old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_crtc_state);
+
+ ret = drm_atomic_set_mode_for_crtc(new_crtc_state, NULL);
+ KUNIT_EXPECT_EQ(test, ret, 0);
+ KUNIT_ASSERT_NE(test, old_crtc_state->enable, new_crtc_state->enable);
+
+ new_crtc_state->active = false;
+ KUNIT_ASSERT_NE(test, old_crtc_state->active, new_crtc_state->active);
+
+ ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL);
+ KUNIT_ASSERT_EQ(test, ret, 0);
+
+ KUNIT_ASSERT_PTR_NE(test, old_conn_state->crtc, new_conn_state->crtc);
+
+ ret = drm_atomic_check_only(state);
+ KUNIT_ASSERT_EQ(test, ret, 0);
+
+ new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_crtc_state);
+ KUNIT_EXPECT_TRUE(test, new_crtc_state->mode_changed);
+ KUNIT_EXPECT_TRUE(test, new_crtc_state->connectors_changed);
+ KUNIT_EXPECT_TRUE(test, new_crtc_state->active_changed);
+}
+
static struct kunit_case drm_atomic_helper_connector_hdmi_check_tests[] = {
KUNIT_CASE(drm_test_check_broadcast_rgb_auto_cea_mode),
KUNIT_CASE(drm_test_check_broadcast_rgb_auto_cea_mode_vic_1),
@@ -1596,6 +1671,7 @@ static struct kunit_case drm_atomic_helper_connector_hdmi_check_tests[] = {
KUNIT_CASE(drm_test_check_tmds_char_rate_rgb_8bpc),
KUNIT_CASE(drm_test_check_tmds_char_rate_rgb_10bpc),
KUNIT_CASE(drm_test_check_tmds_char_rate_rgb_12bpc),
+ KUNIT_CASE(drm_test_check_crtc_deactivate_mode_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
--
2.47.1
