On 04/05/2021 10:26, Tomi Valkeinen wrote:
> On 28/04/2021 16:25, Hans Verkuil wrote:
>> Add bridge connector_attach/detach ops. These ops are called when a
>> bridge is attached or detached to a drm_connector. These ops can be
>> used to register and unregister an HDMI CEC adapter for a bridge that
>> supports CEC.
>>
>> Signed-off-by: Hans Verkuil <[email protected]>
>> ---
>> drivers/gpu/drm/drm_bridge_connector.c | 25 +++++++++++++++++++++++-
>> include/drm/drm_bridge.h | 27 ++++++++++++++++++++++++++
>> 2 files changed, 51 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/drm_bridge_connector.c
>> b/drivers/gpu/drm/drm_bridge_connector.c
>> index 791379816837..0676677badfe 100644
>> --- a/drivers/gpu/drm/drm_bridge_connector.c
>> +++ b/drivers/gpu/drm/drm_bridge_connector.c
>> @@ -203,6 +203,11 @@ static void drm_bridge_connector_destroy(struct
>> drm_connector *connector)
>> {
>> struct drm_bridge_connector *bridge_connector =
>> to_drm_bridge_connector(connector);
>> + struct drm_bridge *bridge;
>> +
>> + drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge)
>> + if (bridge->funcs->connector_detach)
>> + bridge->funcs->connector_detach(bridge, connector);
>>
>> if (bridge_connector->bridge_hpd) {
>> struct drm_bridge *hpd = bridge_connector->bridge_hpd;
>> @@ -318,6 +323,7 @@ struct drm_connector *drm_bridge_connector_init(struct
>> drm_device *drm,
>> struct i2c_adapter *ddc = NULL;
>> struct drm_bridge *bridge;
>> int connector_type;
>> + int ret;
>>
>> bridge_connector = kzalloc(sizeof(*bridge_connector), GFP_KERNEL);
>> if (!bridge_connector)
>> @@ -375,6 +381,23 @@ struct drm_connector *drm_bridge_connector_init(struct
>> drm_device *drm,
>> connector->polled = DRM_CONNECTOR_POLL_CONNECT
>> | DRM_CONNECTOR_POLL_DISCONNECT;
>>
>> - return connector;
>> + ret = 0;
>> + /* call connector_attach for all bridges */
>> + drm_for_each_bridge_in_chain(encoder, bridge) {
>> + if (!bridge->funcs->connector_attach)
>> + continue;
>> + ret = bridge->funcs->connector_attach(bridge, connector);
>> + if (ret)
>> + break;
>> + }
>> + if (!ret)
>> + return connector;
>> +
>> + /* on error, detach any previously successfully attached connectors */
>> + list_for_each_entry_continue_reverse(bridge, &(encoder)->bridge_chain,
>
> No need for parenthesis in (encoder) here.
>
>> + chain_node)
>> + if (bridge->funcs->connector_detach)
>> + bridge->funcs->connector_detach(bridge, connector);
>> + return ERR_PTR(ret);
>> }
>> EXPORT_SYMBOL_GPL(drm_bridge_connector_init);
>> diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
>> index 2195daa289d2..333fbc3a03e9 100644
>> --- a/include/drm/drm_bridge.h
>> +++ b/include/drm/drm_bridge.h
>> @@ -629,6 +629,33 @@ struct drm_bridge_funcs {
>> * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
>> */
>> void (*hpd_disable)(struct drm_bridge *bridge);
>> +
>> + /**
>> + * @connector_attach:
>> + *
>> + * This callback is invoked whenever our bridge is being attached to a
>> + * &drm_connector. This is where an HDMI CEC adapter can be registered.
>> + *
>> + * The @connector_attach callback is optional.
>> + *
>> + * RETURNS:
>> + *
>> + * Zero on success, error code on failure.
>> + */
>> + int (*connector_attach)(struct drm_bridge *bridge,
>> + struct drm_connector *conn);
>> +
>> + /**
>> + * @connector_detach:
>> + *
>> + * This callback is invoked whenever our bridge is being detached from a
>> + * &drm_connector. This is where an HDMI CEC adapter can be
>> + * unregistered.
>> + *
>> + * The @connector_detach callback is optional.
>> + */
>> + void (*connector_detach)(struct drm_bridge *bridge,
>> + struct drm_connector *conn);
>> };
>>
>> /**
>>
>
> Reviewed-by: Tomi Valkeinen <[email protected]>
>
> I can take this series as it's mostly omapdrm, but we'll need a
> reviewed-by/acked-by from a maintainer for this patch.
Laurent, aren't you the drm bridge maintainer?
If so, can you review/ack this patch so Tomi can merge it?
Regards,
Hans
>
> Tomi
>
