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Message-Id: <20250407-drm-hdmi-connector-cec-v5-3-04809b10d206@oss.qualcomm.com>
Date: Mon, 07 Apr 2025 18:11:00 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Dave Stevenson <dave.stevenson@...pberrypi.com>,
Maíra Canal <mcanal@...lia.com>,
Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Dmitry Baryshkov <lumag@...nel.org>
Subject: [PATCH v5 03/11] drm/connector: add CEC-related fields
As a preparation to adding HDMI CEC helper code, add CEC-related fields
to the struct drm_connector. The callbacks abstract CEC infrastructure
in order to support CEC adapters and CEC notifiers in a universal way.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
drivers/gpu/drm/drm_connector.c | 42 +++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 56 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 98 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 48b08c9611a7bc70e4d849ff33ecf1c9de3cf0ae..ba08fbd973829e49ea977251c4f0fb6d96ade631 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -279,6 +279,7 @@ static int drm_connector_init_only(struct drm_device *dev,
INIT_LIST_HEAD(&connector->probed_modes);
INIT_LIST_HEAD(&connector->modes);
mutex_init(&connector->mutex);
+ mutex_init(&connector->cec.mutex);
mutex_init(&connector->eld_mutex);
mutex_init(&connector->edid_override_mutex);
mutex_init(&connector->hdmi.infoframes.lock);
@@ -701,6 +702,47 @@ static void drm_mode_remove(struct drm_connector *connector,
drm_mode_destroy(connector->dev, mode);
}
+/**
+ * drm_connector_cec_phys_addr_invalidate - invalidate CEC physical address
+ * @connector: connector undergoing CEC operation
+ *
+ * Invalidated CEC physical address set for this DRM connector.
+ */
+void drm_connector_cec_phys_addr_invalidate(struct drm_connector *connector)
+{
+ mutex_lock(&connector->cec.mutex);
+
+ if (connector->cec.funcs &&
+ connector->cec.funcs->phys_addr_invalidate)
+ connector->cec.funcs->phys_addr_invalidate(connector);
+
+ mutex_unlock(&connector->cec.mutex);
+}
+EXPORT_SYMBOL(drm_connector_cec_phys_addr_invalidate);
+
+
+/**
+ * drm_connector_cec_phys_addr_set - propagate CEC physical address
+ * @connector: connector undergoing CEC operation
+ *
+ * Propagate CEC physical address from the display_info to this DRM connector.
+ */
+void drm_connector_cec_phys_addr_set(struct drm_connector *connector)
+{
+ u16 addr;
+
+ mutex_lock(&connector->cec.mutex);
+
+ addr = connector->display_info.source_physical_address;
+
+ if (connector->cec.funcs &&
+ connector->cec.funcs->phys_addr_set)
+ connector->cec.funcs->phys_addr_set(connector, addr);
+
+ mutex_unlock(&connector->cec.mutex);
+}
+EXPORT_SYMBOL(drm_connector_cec_phys_addr_set);
+
/**
* drm_connector_cleanup - cleans up an initialised connector
* @connector: connector to cleanup
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index f13d597370a30dc1b14c630ee00145256052ba56..5f47df9a586a3e0acc26204b86ee7242acad7403 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1191,6 +1191,37 @@ struct drm_connector_hdmi_audio_funcs {
bool enable, int direction);
};
+void drm_connector_cec_phys_addr_invalidate(struct drm_connector *connector);
+void drm_connector_cec_phys_addr_set(struct drm_connector *connector);
+
+/**
+ * struct drm_connector_cec_funcs - drm_hdmi_connector control functions
+ */
+struct drm_connector_cec_funcs {
+ /**
+ * @phys_addr_invalidate: mark CEC physical address as invalid
+ *
+ * The callback to mark CEC physical address as invalid, abstracting
+ * the operation.
+ */
+ void (*phys_addr_invalidate)(struct drm_connector *connector);
+
+ /**
+ * @phys_addr_set: set CEC physical address
+ *
+ * The callback to set CEC physical address, abstracting the operation.
+ */
+ void (*phys_addr_set)(struct drm_connector *connector, u16 addr);
+
+ /**
+ * @unregister: unregister CEC adapter / notifier.
+ *
+ * The callback to unregister CEC adapter or notifier, abstracting the
+ * operation.
+ */
+ void (*unregister)(struct drm_connector *connector);
+};
+
/**
* struct drm_connector_hdmi_funcs - drm_hdmi_connector control functions
*/
@@ -1832,6 +1863,26 @@ struct drm_connector_hdmi {
} infoframes;
};
+/**
+ * struct drm_connector_cec - DRM Connector CEC-related structure
+ */
+struct drm_connector_cec {
+ /**
+ * @mutex: protects all fields in this structure.
+ */
+ struct mutex mutex;
+
+ /**
+ * @funcs: CEC Control Functions
+ */
+ const struct drm_connector_cec_funcs *funcs;
+
+ /**
+ * @data: CEC implementation-specific data
+ */
+ void *data;
+};
+
/**
* struct drm_connector - central DRM connector control structure
*
@@ -2253,6 +2304,11 @@ struct drm_connector {
* @hdmi_audio: HDMI codec properties and non-DRM state.
*/
struct drm_connector_hdmi_audio hdmi_audio;
+
+ /**
+ * @cec: CEC-related data.
+ */
+ struct drm_connector_cec cec;
};
#define obj_to_connector(x) container_of(x, struct drm_connector, base)
--
2.39.5
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