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Commit 1d82d0d9 authored by Govinda Rajulu Chenna's avatar Govinda Rajulu Chenna Committed by Gerrit - the friendly Code Review server
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drm/dp: export remote dpcd read/write from drm_dp_mst_topology 



This change exports remote dpcd read/write functions from
drm_dp_mst_topology layer in order to read/write dpcd for
a select dp mst port.

Change-Id: Ib91b71079c2ecbc3702fb89839e46771365c326a
Signed-off-by: default avatarGovinda Rajulu Chenna <gchenna@codeaurora.org>
parent 589aab57

drivers/gpu/drm/drm_dp_mst_topology.c

+6 −12
Original line number Diff line number Diff line
@@ -51,10 +51,6 @@ static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, 
				     int id,

				     struct drm_dp_payload *payload);



static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,

				  struct drm_dp_mst_port *port,

				  int offset, int size, u8 *bytes);



static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,

				     struct drm_dp_mst_branch *mstb);

static int drm_dp_send_enum_path_resources(struct drm_dp_mst_topology_mgr *mgr,
@@ -1403,7 +1399,6 @@ static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr, 
	return false;

}



#if 0

static int build_dpcd_read(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 offset, u8 num_bytes)

{

	struct drm_dp_sideband_msg_req_body req;
@@ -1416,7 +1411,6 @@ static int build_dpcd_read(struct drm_dp_sideband_msg_tx *msg, u8 port_num, u32 


	return 0;

}

#endif



static int drm_dp_send_sideband_msg(struct drm_dp_mst_topology_mgr *mgr,

				    bool up, u8 *msg, int len)
@@ -1982,8 +1976,7 @@ int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr) 
}

EXPORT_SYMBOL(drm_dp_update_payload_part2);



#if 0 /* unused as of yet */

static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr,

int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr,

				 struct drm_dp_mst_port *port,

				 int offset, int size, u8 *bytes)

{
@@ -2037,9 +2030,9 @@ static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr, 
	drm_dp_put_mst_branch_device(mstb);

	return ret;

}

#endif

EXPORT_SYMBOL(drm_dp_send_dpcd_read);



static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,

int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,

			   struct drm_dp_mst_port *port,

			   int offset, int size, u8 *bytes)

{
@@ -2075,6 +2068,7 @@ static int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr, 
	drm_dp_put_mst_branch_device(mstb);

	return ret;

}

EXPORT_SYMBOL(drm_dp_send_dpcd_write);



static int drm_dp_encode_up_ack_reply(struct drm_dp_sideband_msg_tx *msg, u8 req_type)

{

include/drm/drm_dp_mst_helper.h

+8 −0
Original line number Diff line number Diff line
@@ -634,4 +634,12 @@ int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state, 
int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,

				 struct drm_dp_mst_port *port, bool power_up);



int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,

			   struct drm_dp_mst_port *port,

			   int offset, int size, u8 *bytes);



int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr,

				 struct drm_dp_mst_port *port,

				 int offset, int size, u8 *bytes);



#endif