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authorMykola Lysenko <Mykola.Lysenko@amd.com>2016-01-22 17:07:27 -0500
committerDave Airlie <airlied@redhat.com>2016-02-05 15:23:49 +1000
commitcfcfa086d43ced33e1099b9befb12f17fca102e1 (patch)
tree15c539f333e67406ce3112156cc59c42f9221839
parenta9ebb3e46c7ef6112c0da466ef0954673ad36832 (diff)
downloadlinux-cfcfa086d43ced33e1099b9befb12f17fca102e1.tar.bz2
drm/dp/mst: change MST detection scheme
1. Get edid for all connected MST displays, not only on logical ports, in the same thread as MST topology detection is done: There are displays that have branches inside w/o logical ports. So in case another SST display connected downstream system can end-up in situation when 3 DOWN requests sent: two for ‘remote i2c read’ and one for ‘enum path resources’, making slots full. 2. Call notification callback in one place in the end of topology discovery/update: This is done to reduce number of events sent to userspace in case complex topology discovery is going, adding multiple number of connectors; 3. Remove notification callback call from short pulse interrupt processing function: This is done in order not to block interrupt processing function, in case any MST request will be made from it. Notification will be send from topology discovery/update work item. Signed-off-by: Mykola Lysenko <Mykola.Lysenko@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Cc: stable@vger.kernel.org Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/drm_dp_mst_topology.c37
1 files changed, 19 insertions, 18 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 84047b802c18..630e6eb55fa3 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -1130,13 +1130,11 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
drm_dp_put_port(port);
goto out;
}
- if (port->port_num >= DP_MST_LOGICAL_PORT_0) {
- port->cached_edid = drm_get_edid(port->connector, &port->aux.ddc);
- drm_mode_connector_set_tile_property(port->connector);
- }
+
+ drm_mode_connector_set_tile_property(port->connector);
+
(*mstb->mgr->cbs->register_connector)(port->connector);
}
-
out:
/* put reference to this port */
drm_dp_put_port(port);
@@ -1161,9 +1159,9 @@ static void drm_dp_update_port(struct drm_dp_mst_branch *mstb,
port->ddps = conn_stat->displayport_device_plug_status;
if (old_ddps != port->ddps) {
+ dowork = true;
if (port->ddps) {
drm_dp_check_port_guid(mstb, port);
- dowork = true;
} else {
port->guid_valid = false;
port->available_pbn = 0;
@@ -1271,8 +1269,13 @@ static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *m
if (port->input)
continue;
- if (!port->ddps)
+ if (!port->ddps) {
+ if (port->cached_edid) {
+ kfree(port->cached_edid);
+ port->cached_edid = NULL;
+ }
continue;
+ }
if (!port->available_pbn)
drm_dp_send_enum_path_resources(mgr, mstb, port);
@@ -1283,6 +1286,12 @@ static void drm_dp_check_and_send_link_address(struct drm_dp_mst_topology_mgr *m
drm_dp_check_and_send_link_address(mgr, mstb_child);
drm_dp_put_mst_branch_device(mstb_child);
}
+ } else if (port->pdt == DP_PEER_DEVICE_SST_SINK ||
+ port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV) {
+ if (!port->cached_edid) {
+ port->cached_edid =
+ drm_get_edid(port->connector, &port->aux.ddc);
+ }
}
}
}
@@ -1302,6 +1311,8 @@ static void drm_dp_mst_link_probe_work(struct work_struct *work)
drm_dp_check_and_send_link_address(mgr, mstb);
drm_dp_put_mst_branch_device(mstb);
}
+
+ (*mgr->cbs->hotplug)(mgr);
}
static bool drm_dp_validate_guid(struct drm_dp_mst_topology_mgr *mgr,
@@ -1558,7 +1569,6 @@ static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]);
}
- (*mgr->cbs->hotplug)(mgr);
}
} else {
mstb->link_address_sent = false;
@@ -2232,8 +2242,6 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
drm_dp_update_port(mstb, &msg.u.conn_stat);
DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
- (*mgr->cbs->hotplug)(mgr);
-
} else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
if (!mstb)
@@ -2320,10 +2328,6 @@ enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector
case DP_PEER_DEVICE_SST_SINK:
status = connector_status_connected;
- /* for logical ports - cache the EDID */
- if (port->port_num >= 8 && !port->cached_edid) {
- port->cached_edid = drm_get_edid(connector, &port->aux.ddc);
- }
break;
case DP_PEER_DEVICE_DP_LEGACY_CONV:
if (port->ldps)
@@ -2378,10 +2382,7 @@ struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_
if (port->cached_edid)
edid = drm_edid_duplicate(port->cached_edid);
- else {
- edid = drm_get_edid(connector, &port->aux.ddc);
- drm_mode_connector_set_tile_property(connector);
- }
+
port->has_audio = drm_detect_monitor_audio(edid);
drm_dp_put_port(port);
return edid;