[PATCH RFC v2 02/37] drm/connector: hdmi: Create a custom state

From: Maxime Ripard
Date: Wed Sep 20 2023 - 10:35:56 EST


The next features we will need to share across drivers will need to
store some parameters for drivers to use, such as the selected output
format.

Let's create a new connector state dedicated to HDMI controllers, that
will eventually store everything we need.

Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic_state_helper.c | 34 +++++++++++++++++++++++++++++++
include/drm/drm_atomic_state_helper.h | 4 ++++
include/drm/drm_connector.h | 3 +++
3 files changed, 41 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 784e63d70a42..972710a9fd49 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -556,6 +556,21 @@ void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector)
}
EXPORT_SYMBOL(drm_atomic_helper_connector_tv_reset);

+/**
+ * __drm_atomic_helper_connector_hdmi_reset() - Initializes all HDMI @drm_connector_state resources
+ * @connector: DRM connector
+ *
+ * Initializes all HDMI resources from a @drm_connector_state without
+ * actually allocating it. This is useful for HDMI drivers, in
+ * combination with __drm_atomic_helper_connector_reset() or
+ * drm_atomic_helper_connector_reset().
+ */
+void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
+ struct drm_connector_state *new_state)
+{
+}
+EXPORT_SYMBOL(__drm_atomic_helper_connector_hdmi_reset);
+
/**
* drm_atomic_helper_connector_tv_check - Validate an analog TV connector state
* @connector: DRM Connector
@@ -605,6 +620,25 @@ int drm_atomic_helper_connector_tv_check(struct drm_connector *connector,
}
EXPORT_SYMBOL(drm_atomic_helper_connector_tv_check);

+/**
+ * drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state
+ * @connector: DRM Connector
+ * @state: the DRM State object
+ *
+ * Provides a default connector state check handler for HDMI connectors.
+ * Checks that a desired connector update is valid, and updates various
+ * fields of derived state.
+ *
+ * RETURNS:
+ * Zero on success, or an errno code otherwise.
+ */
+int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ return 0;
+}
+EXPORT_SYMBOL(drm_atomic_helper_connector_hdmi_check);
+
/**
* __drm_atomic_helper_connector_duplicate_state - copy atomic connector state
* @connector: connector object
diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
index b9740edb2658..d59d2b3aef9a 100644
--- a/include/drm/drm_atomic_state_helper.h
+++ b/include/drm/drm_atomic_state_helper.h
@@ -71,7 +71,11 @@ void __drm_atomic_helper_connector_state_reset(struct drm_connector_state *conn_
void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
struct drm_connector_state *conn_state);
void drm_atomic_helper_connector_reset(struct drm_connector *connector);
+void __drm_atomic_helper_connector_hdmi_reset(struct drm_connector *connector,
+ struct drm_connector_state *new_state);
void drm_atomic_helper_connector_tv_reset(struct drm_connector *connector);
+int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
+ struct drm_atomic_state *state);
int drm_atomic_helper_connector_tv_check(struct drm_connector *connector,
struct drm_atomic_state *state);
void drm_atomic_helper_connector_tv_margins_reset(struct drm_connector *connector);
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index c86cd363d652..5961f2ad48b1 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1022,6 +1022,9 @@ struct drm_connector_state {
* DRM blob property for HDR output metadata
*/
struct drm_property_blob *hdr_output_metadata;
+
+ struct {
+ } hdmi;
};

/**

--
2.41.0