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drm/bridge: document HDMI CEC callbacks 

Provide documentation for the drm_bridge callbacks related to the
DRM_BRIDGE_OP_HDMI_CEC_ADAPTER flag.

Fixes: a74288c8de ("drm/display: bridge-connector: handle CEC adapters")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/r/20250611140933.1429a1b8@canb.auug.org.au
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250801-drm-hdmi-cec-docs-v1-1-be63e6008d0e@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov 2025-08-01 13:46:41 +03:00
parent 584460393e
commit eec8e8c048
1 changed files with 48 additions and 0 deletions
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48
include/drm/drm_bridge.h
View File

@ -866,13 +866,61 @@ struct drm_bridge_funcs {
struct drm_connector *connector,
bool enable, int direction);
/**
* @hdmi_cec_init:
*
* Initialize CEC part of the bridge.
*
* This callback is optional, it can be implemented by bridges that
* set the @DRM_BRIDGE_OP_HDMI_CEC_ADAPTER flag in their
* &drm_bridge->ops.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_cec_init)(struct drm_bridge *bridge,
struct drm_connector *connector);
/**
* @hdmi_cec_enable:
*
* Enable or disable the CEC adapter inside the bridge.
*
* This callback is optional, it can be implemented by bridges that
* set the @DRM_BRIDGE_OP_HDMI_CEC_ADAPTER flag in their
* &drm_bridge->ops.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_cec_enable)(struct drm_bridge *bridge, bool enable);
/**
* @hdmi_cec_log_addr:
*
* Set the logical address of the CEC adapter inside the bridge.
*
* This callback is optional, it can be implemented by bridges that
* set the @DRM_BRIDGE_OP_HDMI_CEC_ADAPTER flag in their
* &drm_bridge->ops.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_cec_log_addr)(struct drm_bridge *bridge, u8 logical_addr);
/**
* @hdmi_cec_transmit:
*
* Transmit the message using the CEC adapter inside the bridge.
*
* This callback is optional, it can be implemented by bridges that
* set the @DRM_BRIDGE_OP_HDMI_CEC_ADAPTER flag in their
* &drm_bridge->ops.
*
* Returns:
* 0 on success, a negative error code otherwise
*/
int (*hdmi_cec_transmit)(struct drm_bridge *bridge, u8 attempts,
u32 signal_free_time, struct cec_msg *msg);