diff mbox series

[1/5] drm: drm_bridge: add cec_init/exit bridge ops

Message ID 20210211103703.444625-2-hverkuil-cisco@xs4all.nl (mailing list archive)
State New
Headers show
Series drm/omap: hdmi: improve hdmi4 CEC, add CEC for hdmi5 | expand

Commit Message

Hans Verkuil Feb. 11, 2021, 10:36 a.m. UTC
Add bridge cec_init/exit ops. These ops will be responsible for
creating and destroying the CEC adapter for the bridge that supports
CEC.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/drm_bridge_connector.c | 23 +++++++++++++++++++
 include/drm/drm_bridge.h               | 31 ++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

Comments

Tomi Valkeinen Feb. 19, 2021, 11:12 a.m. UTC | #1
On 11/02/2021 12:36, Hans Verkuil wrote:
> Add bridge cec_init/exit ops. These ops will be responsible for
> creating and destroying the CEC adapter for the bridge that supports
> CEC.
> 
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
>  drivers/gpu/drm/drm_bridge_connector.c | 23 +++++++++++++++++++
>  include/drm/drm_bridge.h               | 31 ++++++++++++++++++++++++++
>  2 files changed, 54 insertions(+)

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

 Tomi
Laurent Pinchart Feb. 19, 2021, 12:02 p.m. UTC | #2
Hi Hans,

Thank you for the patch.

On Thu, Feb 11, 2021 at 11:36:59AM +0100, Hans Verkuil wrote:
> Add bridge cec_init/exit ops. These ops will be responsible for
> creating and destroying the CEC adapter for the bridge that supports
> CEC.
> 
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
>  drivers/gpu/drm/drm_bridge_connector.c | 23 +++++++++++++++++++
>  include/drm/drm_bridge.h               | 31 ++++++++++++++++++++++++++
>  2 files changed, 54 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
> index 791379816837..2ff90f5e468c 100644
> --- a/drivers/gpu/drm/drm_bridge_connector.c
> +++ b/drivers/gpu/drm/drm_bridge_connector.c
> @@ -84,6 +84,13 @@ struct drm_bridge_connector {
>  	 * connector modes detection, if any (see &DRM_BRIDGE_OP_MODES).
>  	 */
>  	struct drm_bridge *bridge_modes;
> +	/**
> +	 * @bridge_cec:
> +	 *
> +	 * The last bridge in the chain (closest to the connector) that provides
> +	 * cec adapter support, if any (see &DRM_BRIDGE_OP_CEC).
> +	 */
> +	struct drm_bridge *bridge_cec;
>  };
>  
>  #define to_drm_bridge_connector(x) \
> @@ -204,6 +211,11 @@ static void drm_bridge_connector_destroy(struct drm_connector *connector)
>  	struct drm_bridge_connector *bridge_connector =
>  		to_drm_bridge_connector(connector);
>  
> +	if (bridge_connector->bridge_cec) {
> +		struct drm_bridge *cec = bridge_connector->bridge_cec;
> +
> +		cec->funcs->cec_exit(cec);
> +	}
>  	if (bridge_connector->bridge_hpd) {
>  		struct drm_bridge *hpd = bridge_connector->bridge_hpd;
>  
> @@ -352,6 +364,8 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
>  			bridge_connector->bridge_detect = bridge;
>  		if (bridge->ops & DRM_BRIDGE_OP_MODES)
>  			bridge_connector->bridge_modes = bridge;
> +		if (bridge->ops & DRM_BRIDGE_OP_CEC)
> +			bridge_connector->bridge_cec = bridge;
>  
>  		if (!drm_bridge_get_next_bridge(bridge))
>  			connector_type = bridge->type;
> @@ -374,6 +388,15 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
>  	else if (bridge_connector->bridge_detect)
>  		connector->polled = DRM_CONNECTOR_POLL_CONNECT
>  				  | DRM_CONNECTOR_POLL_DISCONNECT;
> +	if (bridge_connector->bridge_cec) {
> +		struct drm_bridge *bridge = bridge_connector->bridge_cec;
> +		int ret = bridge->funcs->cec_init(bridge, connector);
> +
> +		if (ret) {
> +			drm_bridge_connector_destroy(connector);
> +			return ERR_PTR(ret);
> +		}
> +	}
>  
>  	return connector;
>  }
> diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
> index 2195daa289d2..4c83c2657e87 100644
> --- a/include/drm/drm_bridge.h
> +++ b/include/drm/drm_bridge.h
> @@ -629,6 +629,30 @@ struct drm_bridge_funcs {
>  	 * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
>  	 */
>  	void (*hpd_disable)(struct drm_bridge *bridge);
> +
> +	/**
> +	 * @cec_init:
> +	 *
> +	 * Initialize the CEC adapter.
> +	 *
> +	 * This callback is optional and shall only be implemented by bridges
> +	 * that support a CEC adapter. Bridges that implement it shall also
> +	 * implement the @cec_exit callback and set the DRM_BRIDGE_OP_CEC flag
> +	 * in their &drm_bridge->ops.
> +	 */
> +	int (*cec_init)(struct drm_bridge *bridge, struct drm_connector *conn);
> +
> +	/**
> +	 * @cec_exit:
> +	 *
> +	 * Terminate the CEC adapter.
> +	 *
> +	 * This callback is optional and shall only be implemented by bridges
> +	 * that support a CEC adapter. Bridges that implement it shall also
> +	 * implement the @cec_init callback and set the DRM_BRIDGE_OP_CEC flag
> +	 * in their &drm_bridge->ops.
> +	 */
> +	void (*cec_exit)(struct drm_bridge *bridge);

These are very ad-hoc operations. Would it make sense to have something
that could also be reused for other type of intiialization and cleanup
that require access to the drm_connector ?

>  };
>  
>  /**
> @@ -698,6 +722,13 @@ enum drm_bridge_ops {
>  	 * this flag shall implement the &drm_bridge_funcs->get_modes callback.
>  	 */
>  	DRM_BRIDGE_OP_MODES = BIT(3),
> +	/**
> +	 * @DRM_BRIDGE_OP_CEC: The bridge supports a CEC adapter.
> +	 * Bridges that set this flag shall implement the
> +	 * &drm_bridge_funcs->cec_init and &drm_bridge_funcs->cec_exit
> +	 * callbacks.
> +	 */
> +	DRM_BRIDGE_OP_CEC = BIT(4),
>  };
>  
>  /**
Hans Verkuil March 1, 2021, 10:56 a.m. UTC | #3
On 19/02/2021 13:02, Laurent Pinchart wrote:
> Hi Hans,
> 
> Thank you for the patch.
> 
> On Thu, Feb 11, 2021 at 11:36:59AM +0100, Hans Verkuil wrote:
>> Add bridge cec_init/exit ops. These ops will be responsible for
>> creating and destroying the CEC adapter for the bridge that supports
>> CEC.
>>
>> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
>> ---
>>  drivers/gpu/drm/drm_bridge_connector.c | 23 +++++++++++++++++++
>>  include/drm/drm_bridge.h               | 31 ++++++++++++++++++++++++++
>>  2 files changed, 54 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
>> index 791379816837..2ff90f5e468c 100644
>> --- a/drivers/gpu/drm/drm_bridge_connector.c
>> +++ b/drivers/gpu/drm/drm_bridge_connector.c
>> @@ -84,6 +84,13 @@ struct drm_bridge_connector {
>>  	 * connector modes detection, if any (see &DRM_BRIDGE_OP_MODES).
>>  	 */
>>  	struct drm_bridge *bridge_modes;
>> +	/**
>> +	 * @bridge_cec:
>> +	 *
>> +	 * The last bridge in the chain (closest to the connector) that provides
>> +	 * cec adapter support, if any (see &DRM_BRIDGE_OP_CEC).
>> +	 */
>> +	struct drm_bridge *bridge_cec;
>>  };
>>  
>>  #define to_drm_bridge_connector(x) \
>> @@ -204,6 +211,11 @@ static void drm_bridge_connector_destroy(struct drm_connector *connector)
>>  	struct drm_bridge_connector *bridge_connector =
>>  		to_drm_bridge_connector(connector);
>>  
>> +	if (bridge_connector->bridge_cec) {
>> +		struct drm_bridge *cec = bridge_connector->bridge_cec;
>> +
>> +		cec->funcs->cec_exit(cec);
>> +	}
>>  	if (bridge_connector->bridge_hpd) {
>>  		struct drm_bridge *hpd = bridge_connector->bridge_hpd;
>>  
>> @@ -352,6 +364,8 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
>>  			bridge_connector->bridge_detect = bridge;
>>  		if (bridge->ops & DRM_BRIDGE_OP_MODES)
>>  			bridge_connector->bridge_modes = bridge;
>> +		if (bridge->ops & DRM_BRIDGE_OP_CEC)
>> +			bridge_connector->bridge_cec = bridge;
>>  
>>  		if (!drm_bridge_get_next_bridge(bridge))
>>  			connector_type = bridge->type;
>> @@ -374,6 +388,15 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
>>  	else if (bridge_connector->bridge_detect)
>>  		connector->polled = DRM_CONNECTOR_POLL_CONNECT
>>  				  | DRM_CONNECTOR_POLL_DISCONNECT;
>> +	if (bridge_connector->bridge_cec) {
>> +		struct drm_bridge *bridge = bridge_connector->bridge_cec;
>> +		int ret = bridge->funcs->cec_init(bridge, connector);
>> +
>> +		if (ret) {
>> +			drm_bridge_connector_destroy(connector);
>> +			return ERR_PTR(ret);
>> +		}
>> +	}
>>  
>>  	return connector;
>>  }
>> diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
>> index 2195daa289d2..4c83c2657e87 100644
>> --- a/include/drm/drm_bridge.h
>> +++ b/include/drm/drm_bridge.h
>> @@ -629,6 +629,30 @@ struct drm_bridge_funcs {
>>  	 * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
>>  	 */
>>  	void (*hpd_disable)(struct drm_bridge *bridge);
>> +
>> +	/**
>> +	 * @cec_init:
>> +	 *
>> +	 * Initialize the CEC adapter.
>> +	 *
>> +	 * This callback is optional and shall only be implemented by bridges
>> +	 * that support a CEC adapter. Bridges that implement it shall also
>> +	 * implement the @cec_exit callback and set the DRM_BRIDGE_OP_CEC flag
>> +	 * in their &drm_bridge->ops.
>> +	 */
>> +	int (*cec_init)(struct drm_bridge *bridge, struct drm_connector *conn);
>> +
>> +	/**
>> +	 * @cec_exit:
>> +	 *
>> +	 * Terminate the CEC adapter.
>> +	 *
>> +	 * This callback is optional and shall only be implemented by bridges
>> +	 * that support a CEC adapter. Bridges that implement it shall also
>> +	 * implement the @cec_init callback and set the DRM_BRIDGE_OP_CEC flag
>> +	 * in their &drm_bridge->ops.
>> +	 */
>> +	void (*cec_exit)(struct drm_bridge *bridge);
> 
> These are very ad-hoc operations. Would it make sense to have something
> that could also be reused for other type of intiialization and cleanup
> that require access to the drm_connector ?

I do not have a very strong opinion, to be honest.

How about this:

	/**
	 * @DRM_BRIDGE_OP_CONN: The bridge can do additional work when
	 * a drm_connector is created or destroyed, such as creating or
	 * removing a CEC adapter.
	 * &drm_bridge_funcs->conn_init and &drm_bridge_funcs->conn_exit
	 * callbacks.
	 */
	DRM_BRIDGE_OP_CONN = BIT(4),

Would that work better for you?

Regards,

	Hans

> 
>>  };
>>  
>>  /**
>> @@ -698,6 +722,13 @@ enum drm_bridge_ops {
>>  	 * this flag shall implement the &drm_bridge_funcs->get_modes callback.
>>  	 */
>>  	DRM_BRIDGE_OP_MODES = BIT(3),
>> +	/**
>> +	 * @DRM_BRIDGE_OP_CEC: The bridge supports a CEC adapter.
>> +	 * Bridges that set this flag shall implement the
>> +	 * &drm_bridge_funcs->cec_init and &drm_bridge_funcs->cec_exit
>> +	 * callbacks.
>> +	 */
>> +	DRM_BRIDGE_OP_CEC = BIT(4),
>>  };
>>  
>>  /**
>
Laurent Pinchart March 1, 2021, 4:25 p.m. UTC | #4
Hi Hans,

(CC'ing the DRM bridge maintainers and Daniel Vetter)

On Mon, Mar 01, 2021 at 11:56:28AM +0100, Hans Verkuil wrote:
> On 19/02/2021 13:02, Laurent Pinchart wrote:
> > On Thu, Feb 11, 2021 at 11:36:59AM +0100, Hans Verkuil wrote:
> >> Add bridge cec_init/exit ops. These ops will be responsible for
> >> creating and destroying the CEC adapter for the bridge that supports
> >> CEC.
> >>
> >> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> >> ---
> >>  drivers/gpu/drm/drm_bridge_connector.c | 23 +++++++++++++++++++
> >>  include/drm/drm_bridge.h               | 31 ++++++++++++++++++++++++++
> >>  2 files changed, 54 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
> >> index 791379816837..2ff90f5e468c 100644
> >> --- a/drivers/gpu/drm/drm_bridge_connector.c
> >> +++ b/drivers/gpu/drm/drm_bridge_connector.c
> >> @@ -84,6 +84,13 @@ struct drm_bridge_connector {
> >>  	 * connector modes detection, if any (see &DRM_BRIDGE_OP_MODES).
> >>  	 */
> >>  	struct drm_bridge *bridge_modes;
> >> +	/**
> >> +	 * @bridge_cec:
> >> +	 *
> >> +	 * The last bridge in the chain (closest to the connector) that provides
> >> +	 * cec adapter support, if any (see &DRM_BRIDGE_OP_CEC).
> >> +	 */
> >> +	struct drm_bridge *bridge_cec;
> >>  };
> >>  
> >>  #define to_drm_bridge_connector(x) \
> >> @@ -204,6 +211,11 @@ static void drm_bridge_connector_destroy(struct drm_connector *connector)
> >>  	struct drm_bridge_connector *bridge_connector =
> >>  		to_drm_bridge_connector(connector);
> >>  
> >> +	if (bridge_connector->bridge_cec) {
> >> +		struct drm_bridge *cec = bridge_connector->bridge_cec;
> >> +
> >> +		cec->funcs->cec_exit(cec);
> >> +	}
> >>  	if (bridge_connector->bridge_hpd) {
> >>  		struct drm_bridge *hpd = bridge_connector->bridge_hpd;
> >>  
> >> @@ -352,6 +364,8 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
> >>  			bridge_connector->bridge_detect = bridge;
> >>  		if (bridge->ops & DRM_BRIDGE_OP_MODES)
> >>  			bridge_connector->bridge_modes = bridge;
> >> +		if (bridge->ops & DRM_BRIDGE_OP_CEC)
> >> +			bridge_connector->bridge_cec = bridge;
> >>  
> >>  		if (!drm_bridge_get_next_bridge(bridge))
> >>  			connector_type = bridge->type;
> >> @@ -374,6 +388,15 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
> >>  	else if (bridge_connector->bridge_detect)
> >>  		connector->polled = DRM_CONNECTOR_POLL_CONNECT
> >>  				  | DRM_CONNECTOR_POLL_DISCONNECT;
> >> +	if (bridge_connector->bridge_cec) {
> >> +		struct drm_bridge *bridge = bridge_connector->bridge_cec;
> >> +		int ret = bridge->funcs->cec_init(bridge, connector);
> >> +
> >> +		if (ret) {
> >> +			drm_bridge_connector_destroy(connector);
> >> +			return ERR_PTR(ret);
> >> +		}
> >> +	}
> >>  
> >>  	return connector;
> >>  }
> >> diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
> >> index 2195daa289d2..4c83c2657e87 100644
> >> --- a/include/drm/drm_bridge.h
> >> +++ b/include/drm/drm_bridge.h
> >> @@ -629,6 +629,30 @@ struct drm_bridge_funcs {
> >>  	 * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
> >>  	 */
> >>  	void (*hpd_disable)(struct drm_bridge *bridge);
> >> +
> >> +	/**
> >> +	 * @cec_init:
> >> +	 *
> >> +	 * Initialize the CEC adapter.
> >> +	 *
> >> +	 * This callback is optional and shall only be implemented by bridges
> >> +	 * that support a CEC adapter. Bridges that implement it shall also
> >> +	 * implement the @cec_exit callback and set the DRM_BRIDGE_OP_CEC flag
> >> +	 * in their &drm_bridge->ops.
> >> +	 */
> >> +	int (*cec_init)(struct drm_bridge *bridge, struct drm_connector *conn);
> >> +
> >> +	/**
> >> +	 * @cec_exit:
> >> +	 *
> >> +	 * Terminate the CEC adapter.
> >> +	 *
> >> +	 * This callback is optional and shall only be implemented by bridges
> >> +	 * that support a CEC adapter. Bridges that implement it shall also
> >> +	 * implement the @cec_init callback and set the DRM_BRIDGE_OP_CEC flag
> >> +	 * in their &drm_bridge->ops.
> >> +	 */
> >> +	void (*cec_exit)(struct drm_bridge *bridge);
> > 
> > These are very ad-hoc operations. Would it make sense to have something
> > that could also be reused for other type of intiialization and cleanup
> > that require access to the drm_connector ?
> 
> I do not have a very strong opinion, to be honest.
> 
> How about this:
> 
> 	/**
> 	 * @DRM_BRIDGE_OP_CONN: The bridge can do additional work when
> 	 * a drm_connector is created or destroyed, such as creating or
> 	 * removing a CEC adapter.
> 	 * &drm_bridge_funcs->conn_init and &drm_bridge_funcs->conn_exit
> 	 * callbacks.
> 	 */
> 	DRM_BRIDGE_OP_CONN = BIT(4),
> 
> Would that work better for you?

I like that better, it's more generic, but I then think we should drop
DRM_BRIDGE_OP_CONN. More than one bridge may need to be notified of
connector creation and deletion, so I'd loop over the bridges and call
all the ones that implement conn_init and conn_exit (which I'd rename to
spell out connector in full, but maybe there could also be better names
for init/exit as conn_init doesn't initialize the connector itself).

We could also merge the conn_init and conn_exit operations into a
connector_notify operation that would take an enum notification
parameter.

> >>  };
> >>  
> >>  /**
> >> @@ -698,6 +722,13 @@ enum drm_bridge_ops {
> >>  	 * this flag shall implement the &drm_bridge_funcs->get_modes callback.
> >>  	 */
> >>  	DRM_BRIDGE_OP_MODES = BIT(3),
> >> +	/**
> >> +	 * @DRM_BRIDGE_OP_CEC: The bridge supports a CEC adapter.
> >> +	 * Bridges that set this flag shall implement the
> >> +	 * &drm_bridge_funcs->cec_init and &drm_bridge_funcs->cec_exit
> >> +	 * callbacks.
> >> +	 */
> >> +	DRM_BRIDGE_OP_CEC = BIT(4),
> >>  };
> >>  
> >>  /**
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
index 791379816837..2ff90f5e468c 100644
--- a/drivers/gpu/drm/drm_bridge_connector.c
+++ b/drivers/gpu/drm/drm_bridge_connector.c
@@ -84,6 +84,13 @@  struct drm_bridge_connector {
 	 * connector modes detection, if any (see &DRM_BRIDGE_OP_MODES).
 	 */
 	struct drm_bridge *bridge_modes;
+	/**
+	 * @bridge_cec:
+	 *
+	 * The last bridge in the chain (closest to the connector) that provides
+	 * cec adapter support, if any (see &DRM_BRIDGE_OP_CEC).
+	 */
+	struct drm_bridge *bridge_cec;
 };
 
 #define to_drm_bridge_connector(x) \
@@ -204,6 +211,11 @@  static void drm_bridge_connector_destroy(struct drm_connector *connector)
 	struct drm_bridge_connector *bridge_connector =
 		to_drm_bridge_connector(connector);
 
+	if (bridge_connector->bridge_cec) {
+		struct drm_bridge *cec = bridge_connector->bridge_cec;
+
+		cec->funcs->cec_exit(cec);
+	}
 	if (bridge_connector->bridge_hpd) {
 		struct drm_bridge *hpd = bridge_connector->bridge_hpd;
 
@@ -352,6 +364,8 @@  struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 			bridge_connector->bridge_detect = bridge;
 		if (bridge->ops & DRM_BRIDGE_OP_MODES)
 			bridge_connector->bridge_modes = bridge;
+		if (bridge->ops & DRM_BRIDGE_OP_CEC)
+			bridge_connector->bridge_cec = bridge;
 
 		if (!drm_bridge_get_next_bridge(bridge))
 			connector_type = bridge->type;
@@ -374,6 +388,15 @@  struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
 	else if (bridge_connector->bridge_detect)
 		connector->polled = DRM_CONNECTOR_POLL_CONNECT
 				  | DRM_CONNECTOR_POLL_DISCONNECT;
+	if (bridge_connector->bridge_cec) {
+		struct drm_bridge *bridge = bridge_connector->bridge_cec;
+		int ret = bridge->funcs->cec_init(bridge, connector);
+
+		if (ret) {
+			drm_bridge_connector_destroy(connector);
+			return ERR_PTR(ret);
+		}
+	}
 
 	return connector;
 }
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 2195daa289d2..4c83c2657e87 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -629,6 +629,30 @@  struct drm_bridge_funcs {
 	 * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
 	 */
 	void (*hpd_disable)(struct drm_bridge *bridge);
+
+	/**
+	 * @cec_init:
+	 *
+	 * Initialize the CEC adapter.
+	 *
+	 * This callback is optional and shall only be implemented by bridges
+	 * that support a CEC adapter. Bridges that implement it shall also
+	 * implement the @cec_exit callback and set the DRM_BRIDGE_OP_CEC flag
+	 * in their &drm_bridge->ops.
+	 */
+	int (*cec_init)(struct drm_bridge *bridge, struct drm_connector *conn);
+
+	/**
+	 * @cec_exit:
+	 *
+	 * Terminate the CEC adapter.
+	 *
+	 * This callback is optional and shall only be implemented by bridges
+	 * that support a CEC adapter. Bridges that implement it shall also
+	 * implement the @cec_init callback and set the DRM_BRIDGE_OP_CEC flag
+	 * in their &drm_bridge->ops.
+	 */
+	void (*cec_exit)(struct drm_bridge *bridge);
 };
 
 /**
@@ -698,6 +722,13 @@  enum drm_bridge_ops {
 	 * this flag shall implement the &drm_bridge_funcs->get_modes callback.
 	 */
 	DRM_BRIDGE_OP_MODES = BIT(3),
+	/**
+	 * @DRM_BRIDGE_OP_CEC: The bridge supports a CEC adapter.
+	 * Bridges that set this flag shall implement the
+	 * &drm_bridge_funcs->cec_init and &drm_bridge_funcs->cec_exit
+	 * callbacks.
+	 */
+	DRM_BRIDGE_OP_CEC = BIT(4),
 };
 
 /**