Commit f3c03be1 authored by Jani Nikula's avatar Jani Nikula
Browse files

drm/dp: extract drm_dp_dpcd_clear_payload() 



SST with 128b/132b channel coding needs this too. Extract to a separate
helper, independent of MST.

Cc: Lyude Paul <lyude@redhat.com>
Reviewed-by: default avatarImre Deak <imre.deak@intel.com>
Reviewed-by: default avatarLyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/904fa73ea9ea976185062eeb493a08ffc43ed27e.1733238941.git.jani.nikula@intel.com


Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 3b00b53a

drivers/gpu/drm/display/drm_dp_helper.c

+14 −0
Original line number Diff line number Diff line
@@ -849,6 +849,20 @@ int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux, 
}

EXPORT_SYMBOL(drm_dp_dpcd_write_payload);



/**

 * drm_dp_dpcd_clear_payload() - Clear the entire VC Payload ID table

 * @aux: DisplayPort AUX channel

 *

 * Clear the entire VC Payload ID table.

 *

 * Returns: 0 on success, negative error code on errors.

 */

int drm_dp_dpcd_clear_payload(struct drm_dp_aux *aux)

{

	return drm_dp_dpcd_write_payload(aux, 0, 0, 0x3f);

}

EXPORT_SYMBOL(drm_dp_dpcd_clear_payload);



/**

 * drm_dp_dpcd_poll_act_handled() - Poll for ACT handled status

 * @aux: DisplayPort AUX channel

drivers/gpu/drm/display/drm_dp_mst_topology.c

+1 −1
Original line number Diff line number Diff line
@@ -3679,7 +3679,7 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms 
			goto out_unlock;



		/* Write reset payload */

		drm_dp_dpcd_write_payload(mgr->aux, 0, 0, 0x3f);

		drm_dp_dpcd_clear_payload(mgr->aux);



		drm_dp_mst_queue_probe_work(mgr);

include/drm/display/drm_dp_helper.h

+1 −0
Original line number Diff line number Diff line
@@ -569,6 +569,7 @@ int drm_dp_dpcd_read_phy_link_status(struct drm_dp_aux *aux, 


int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux,

			      int vcpid, u8 start_time_slot, u8 time_slot_count);

int drm_dp_dpcd_clear_payload(struct drm_dp_aux *aux);

int drm_dp_dpcd_poll_act_handled(struct drm_dp_aux *aux, int timeout_ms);



bool drm_dp_send_real_edid_checksum(struct drm_dp_aux *aux,