From: Maxime Ripard <mripard@kernel.org>
Date: Thu, 13 Mar 2025 11:59:59 +0000 (+0100)
Subject: drm/tests: helpers: Create new helper to enable output
X-Git-Tag: v6.16-rc1~144^2~21^2~177
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e4e3de631d148d075cb0b3dc3c4c62f1e70fc46c;p=thirdparty%2Flinux.git

drm/tests: helpers: Create new helper to enable output

We'll need the HDMI state tests light_up_connector() function in more
tests, so let's promote it to a helper.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313-bridge-connector-v6-5-511c54a604fb@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
---

diff --git a/drivers/gpu/drm/tests/drm_kunit_helpers.c b/drivers/gpu/drm/tests/drm_kunit_helpers.c
index a4eb68f0decca..14ad8f0a0af18 100644
--- a/drivers/gpu/drm/tests/drm_kunit_helpers.c
+++ b/drivers/gpu/drm/tests/drm_kunit_helpers.c
@@ -2,6 +2,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_uapi.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_fourcc.h>
@@ -271,6 +272,66 @@ drm_kunit_helper_create_crtc(struct kunit *test,
 }
 EXPORT_SYMBOL_GPL(drm_kunit_helper_create_crtc);
 
+/**
+ * drm_kunit_helper_enable_crtc_connector - Enables a CRTC -> Connector output
+ * @test: The test context object
+ * @drm: The device to alloc the plane for
+ * @crtc: The CRTC to enable
+ * @connector: The Connector to enable
+ * @mode: The display mode to configure the CRTC with
+ * @ctx: Locking context
+ *
+ * This function creates an atomic update to enable the route from @crtc
+ * to @connector, with the given @mode.
+ *
+ * Returns:
+ *
+ * A pointer to the new CRTC, or an ERR_PTR() otherwise. If the error
+ * returned is EDEADLK, the entire atomic sequence must be restarted.
+ */
+int drm_kunit_helper_enable_crtc_connector(struct kunit *test,
+					   struct drm_device *drm,
+					   struct drm_crtc *crtc,
+					   struct drm_connector *connector,
+					   const struct drm_display_mode *mode,
+					   struct drm_modeset_acquire_ctx *ctx)
+{
+	struct drm_atomic_state *state;
+	struct drm_connector_state *conn_state;
+	struct drm_crtc_state *crtc_state;
+	int ret;
+
+	state = drm_kunit_helper_atomic_state_alloc(test, drm, ctx);
+	if (IS_ERR(state))
+		return PTR_ERR(state);
+
+	conn_state = drm_atomic_get_connector_state(state, connector);
+	if (IS_ERR(conn_state))
+		return PTR_ERR(conn_state);
+
+	ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
+	if (ret)
+		return ret;
+
+	crtc_state = drm_atomic_get_crtc_state(state, crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
+	if (ret)
+		return ret;
+
+	crtc_state->enable = true;
+	crtc_state->active = true;
+
+	ret = drm_atomic_commit(state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(drm_kunit_helper_enable_crtc_connector);
+
 static void kunit_action_drm_mode_destroy(void *ptr)
 {
 	struct drm_display_mode *mode = ptr;
diff --git a/include/drm/drm_kunit_helpers.h b/include/drm/drm_kunit_helpers.h
index 11d59ce0bac0b..1cda7281f3002 100644
--- a/include/drm/drm_kunit_helpers.h
+++ b/include/drm/drm_kunit_helpers.h
@@ -9,6 +9,7 @@
 
 #include <kunit/test.h>
 
+struct drm_connector;
 struct drm_crtc_funcs;
 struct drm_crtc_helper_funcs;
 struct drm_device;
@@ -118,6 +119,13 @@ drm_kunit_helper_create_crtc(struct kunit *test,
 			     const struct drm_crtc_funcs *funcs,
 			     const struct drm_crtc_helper_funcs *helper_funcs);
 
+int drm_kunit_helper_enable_crtc_connector(struct kunit *test,
+					   struct drm_device *drm,
+					   struct drm_crtc *crtc,
+					   struct drm_connector *connector,
+					   const struct drm_display_mode *mode,
+					   struct drm_modeset_acquire_ctx *ctx);
+
 struct drm_display_mode *
 drm_kunit_display_mode_from_cea_vic(struct kunit *test, struct drm_device *dev,
 				    u8 video_code);