[PATCH v11 22/74] drm/display: hdmi-state-helper: Add drm_atomic_helper_connector_hdmi_force_ctx()

[Cristian Ciocaltea]

Introduce drm_atomic_helper_connector_hdmi_force_ctx() as the HDMI
connector implementation of the .force_ctx() callback.  It receives the
modeset acquire context, allowing it to take additional locks, e.g. to
support SCDC status synchronization.

Since migrating from the .force() callback is somewhat more involved,
its users will be migrated incrementally, after which
drm_atomic_helper_connector_hdmi_force() will be removed.

Reviewed-by: Maxime Ripard <mripard at kernel.org>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea at collabora.com>
---
 drivers/gpu/drm/display/drm_hdmi_state_helper.c | 21 +++++++++++++++++++++
 include/drm/display/drm_hdmi_state_helper.h     |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
index 485fcca2de4b..8045b1d17d6e 100644
--- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
@@ -1424,3 +1424,24 @@ void drm_atomic_helper_connector_hdmi_force(struct drm_connector *connector)
 	drm_atomic_helper_connector_hdmi_update(connector, NULL, connector->status);
 }
 EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_force);
+
+/**
+ * drm_atomic_helper_connector_hdmi_force_ctx - HDMI Connector implementation
+ * of the force_ctx callback
+ * @connector: A pointer to the HDMI connector
+ * @ctx: Lock acquisition context to be used for resetting CRTC
+ *
+ * This function implements the .force_ctx() callback for the HDMI connectors.
+ * It can either be used directly as the callback or should be called from
+ * within the .force_ctx() callback implementation to maintain the HDMI-specific
+ * connector's data.
+ *
+ * Returns:
+ * Zero on success, error code on failure, including -EDEADLK.
+ */
+int drm_atomic_helper_connector_hdmi_force_ctx(struct drm_connector *connector,
+					       struct drm_modeset_acquire_ctx *ctx)
+{
+	return drm_atomic_helper_connector_hdmi_update(connector, ctx, connector->status);
+}
+EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_force_ctx);
diff --git a/include/drm/display/drm_hdmi_state_helper.h b/include/drm/display/drm_hdmi_state_helper.h
index 2439bad15c4b..965342f6bbc9 100644
--- a/include/drm/display/drm_hdmi_state_helper.h
+++ b/include/drm/display/drm_hdmi_state_helper.h
@@ -28,6 +28,8 @@ int drm_atomic_helper_connector_hdmi_hotplug(struct drm_connector *connector,
 					     struct drm_modeset_acquire_ctx *ctx,
 					     enum drm_connector_status status);
 void drm_atomic_helper_connector_hdmi_force(struct drm_connector *connector);
+int drm_atomic_helper_connector_hdmi_force_ctx(struct drm_connector *connector,
+					       struct drm_modeset_acquire_ctx *ctx);
 
 enum drm_mode_status
 drm_hdmi_connector_mode_valid(struct drm_connector *connector,

-- 
2.55.0