Commit 87f5942d authored by Dave Airlie's avatar Dave Airlie Committed by Alex Deucher
Browse files

drm/dp_mst: add a function to retrieve vcpi slots 



radeon requires this to get the slots for later filling
out a table on every transition.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 875711f0

drivers/gpu/drm/drm_dp_mst_topology.c

+13 −0
Original line number Diff line number Diff line
@@ -2319,6 +2319,19 @@ out: 
}

EXPORT_SYMBOL(drm_dp_mst_allocate_vcpi);



int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port)

{

	int slots = 0;

	port = drm_dp_get_validated_port_ref(mgr, port);

	if (!port)

		return slots;



	slots = port->vcpi.num_slots;

	drm_dp_put_port(port);

	return slots;

}

EXPORT_SYMBOL(drm_dp_mst_get_vcpi_slots);



/**

 * drm_dp_mst_reset_vcpi_slots() - Reset number of slots to 0 for VCPI

 * @mgr: manager for this port

include/drm/drm_dp_mst_helper.h

+2 −0
Original line number Diff line number Diff line
@@ -486,6 +486,8 @@ int drm_dp_calc_pbn_mode(int clock, int bpp); 


bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int pbn, int *slots);



int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);





void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);

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