Hi Laurent
Small nit below.
> /**
> * struct drm_bridge_funcs - drm_bridge control functions
> @@ -338,6 +343,119 @@ struct drm_bridge_funcs {
> */
> void (*atomic_post_disable)(struct drm_bridge *bridge,
> struct drm_atomic_state *old_state);
> +
> + /**
> + * @detect:
> + *
> + * Check if anything is attached to the bridge output.
> + *
> + * This callback is optional, if not implemented the bridge will be
> + * considered as always having a component attached to its output.
> + * Bridges that implement this callback shall set the
> + * DRM_BRIDGE_OP_DETECT flag in their &drm_bridge->ops.
> + *
> + * RETURNS:
> + *
> + * drm_connector_status indicating the bridge output status.
> + */
> + enum drm_connector_status (*detect)(struct drm_bridge *bridge);
> +
> + /**
> + * @get_modes:
> + *
> + * Fill all modes currently valid for the sink into the &drm_connector
> + * with drm_mode_probed_add().
> + *
> + * The @get_modes callback is mostly intended to support non-probable
non-probeable?
> + * displays such as many fixed panels. Bridges that support reading
> + * EDID shall leave @get_modes unimplemented and implement the
> + * &drm_bridge_funcs->get_edid callback instead.
> + *
> + * This callback is optional. Bridges that implement it shall set the
> + * DRM_BRIDGE_OP_MODES flag in their &drm_bridge->ops.
> + *
> + * The connector parameter shall be used for the sole purpose of
> + * filling modes, and shall not be stored internally by bridge drivers
> + * for future usage.
> + *
> + * RETURNS:
> + *
> + * The number of modes added by calling drm_mode_probed_add().
> + */
> + int (*get_modes)(struct drm_bridge *bridge,
> + struct drm_connector *connector);
> +
> + /**
> + * @get_edid:
> + *
> + * Read and parse the EDID data of the connected display.
> + *
> + * The @get_edid callback is the preferred way of reporting mode
> + * information for a display connected to the bridge output. Bridges
> + * that support readind EDID shall implement this callback and leave
s/readind/probing/? - or fix the spelling mistake.
> + * the @get_modes callback unimplemented.
> + *
> + * The caller of this operation shall first verify the output
> + * connection status and refrain from reading EDID from a disconnected
> + * output.
> + *
> + * This callback is optional. Bridges that implement it shall set the
> + * DRM_BRIDGE_OP_EDID flag in their &drm_bridge->ops.
> + *
> + * The connector parameter shall be used for the sole purpose of EDID
> + * retrieval and parsing, and shall not be stored internally by bridge
> + * drivers for future usage.
> + *
> + * RETURNS:
> + *
> + * An edid structure newly allocated with kmalloc() (or similar) on
> + * success, or NULL otherwise. The caller is responsible for freeing
> + * the returned edid structure with kfree().
> + */
> + struct edid *(*get_edid)(struct drm_bridge *bridge,
> + struct drm_connector *connector);
> +
> + /**
> + * @hpd_notify:
> + *
> + * Notify the bridge of hot plug detection.
> + *
> + * This callback is optional, it may be implemented by bridges that
> + * need to be notified of display connection or disconnection for
> + * internal reasons. One use case is to reset the internal state of CEC
> + * controllers for HDMI bridges.
> + */
> + void (*hpd_notify)(struct drm_bridge *bridge,
> + enum drm_connector_status status);
> +
> + /**
> + * @hpd_enable:
> + *
> + * Enable hot plug detection. From now on the bridge shall call
> + * drm_bridge_hpd_notify() each time a change is detected in the output
> + * connection status, until hot plug detection gets disabled with
> + * @hpd_disable.
> + *
> + * This callback is optional and shall only be implemented by bridges
> + * that support hot-plug notification without polling. Bridges that
> + * implement it shall also implement the @hpd_disable callback and set
> + * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
> + */
> + void (*hpd_enable)(struct drm_bridge *bridge);
> +
> + /**
> + * @hpd_disable:
> + *
> + * Disable hot plug detection. Once this function returns the bridge
> + * shall not call drm_bridge_hpd_notify() when a change in the output
> + * connection status occurs.
> + *
> + * This callback is optional and shall only be implemented by bridges
> + * that support hot-plug notification without polling. Bridges that
> + * implement it shall also implement the @hpd_enable callback and set
> + * the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
> + */
> + void (*hpd_disable)(struct drm_bridge *bridge);
> };
>
> /**
> @@ -376,6 +494,39 @@ struct drm_bridge_timings {
> bool dual_link;
> };
>
> +/**
> + * enum drm_bridge_ops - Bitmask of operations supported by the bridge
> + */
> +enum drm_bridge_ops {
> + /**
> + * @DRM_BRIDGE_OP_DETECT: The bridge can detect displays connected to
> + * its output. Bridges that set this flag shall implement the
> + * &drm_bridge_funcs->detect callback.
> + */
> + DRM_BRIDGE_OP_DETECT = BIT(0),
> + /**
> + * @DRM_BRIDGE_OP_EDID: The bridge can retrieve the EDID of the display
> + * connected to its output. Bridges that set this flag shall implement
> + * the &drm_bridge_funcs->get_edid callback.
> + */
> + DRM_BRIDGE_OP_EDID = BIT(1),
> + /**
> + * @DRM_BRIDGE_OP_HPD: The bridge can detect hot-plug and hot-unplug
> + * without requiring polling. Bridges that set this flag shall
> + * implement the &drm_bridge_funcs->hpd_enable and
> + * &drm_bridge_funcs->hpd_disable callbacks if they support enabling
> + * and disabling hot-plug detection dynamically.
> + */
> + DRM_BRIDGE_OP_HPD = BIT(2),
> + /**
> + * @DRM_BRIDGE_OP_MODES: The bridge can retrieving the modes supported
> + * by the display at its output. This does not include readind EDID
s/readind/probing/?
> + * which is separately covered by @DRM_BRIDGE_OP_EDID. Bridges that set
> + * this flag shall implement the &drm_bridge_funcs->get_modes callback.
> + */
> + DRM_BRIDGE_OP_MODES = BIT(3),
> +};
> +
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