Convert the topology manager to use struct drm_edid, add
drm_dp_mst_edid_read() that returns drm_edid, and rewrite the old
drm_dp_mst_get_edid() to use it.
Note that the old drm_get_edid() ended up calling
drm_connector_update_edid_property(). This responsibility is now
deferred to drivers, which all do it anyway after calling
drm_dp_mst_edid_read() or drm_dp_mst_get_edid().
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/display/drm_dp_mst_topology.c | 53 +++++++++++++++----
include/drm/display/drm_dp_mst_helper.h | 9 +++-
2 files changed, 49 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c
index a2b8732db0c8..be71be95b706 100644
--- a/drivers/gpu/drm/display/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c
@@ -1823,7 +1823,7 @@ static void drm_dp_destroy_port(struct kref *kref)
return;
}
- kfree(port->cached_edid);
+ drm_edid_free(port->cached_edid);
/*
* we can't destroy the connector here, as we might be holding the
@@ -2272,8 +2272,8 @@ drm_dp_mst_port_add_connector(struct drm_dp_mst_branch *mstb,
if (port->pdt != DP_PEER_DEVICE_NONE &&
drm_dp_mst_is_end_device(port->pdt, port->mcs) &&
port->port_num >= DP_MST_LOGICAL_PORT_0)
- port->cached_edid = drm_get_edid(port->connector,
- &port->aux.ddc);
+ port->cached_edid = drm_edid_read_ddc(port->connector,
+ &port->aux.ddc);
drm_connector_register(port->connector);
return;
@@ -4133,7 +4133,7 @@ drm_dp_mst_detect_port(struct drm_connector *connector,
ret = connector_status_connected;
/* for logical ports - cache the EDID */
if (port->port_num >= DP_MST_LOGICAL_PORT_0 && !port->cached_edid)
- port->cached_edid = drm_get_edid(connector, &port->aux.ddc);
+ port->cached_edid = drm_edid_read_ddc(connector, &port->aux.ddc);
break;
case DP_PEER_DEVICE_DP_LEGACY_CONV:
if (port->ldps)
@@ -4147,7 +4147,7 @@ drm_dp_mst_detect_port(struct drm_connector *connector,
EXPORT_SYMBOL(drm_dp_mst_detect_port);
/**
- * drm_dp_mst_get_edid() - get EDID for an MST port
+ * drm_dp_mst_edid_read() - get EDID for an MST port
* @connector: toplevel connector to get EDID for
* @mgr: manager for this port
* @port: unverified pointer to a port.
@@ -4156,9 +4156,11 @@ EXPORT_SYMBOL(drm_dp_mst_detect_port);
* It validates the pointer still exists so the caller doesn't require a
* reference.
*/
-struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port)
+const struct drm_edid *drm_dp_mst_edid_read(struct drm_connector *connector,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port)
{
- struct edid *edid = NULL;
+ const struct drm_edid *drm_edid;
/* we need to search for the port in the mgr in case it's gone */
port = drm_dp_mst_topology_get_port_validated(mgr, port);
@@ -4166,12 +4168,41 @@ struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_
return NULL;
if (port->cached_edid)
- edid = drm_edid_duplicate(port->cached_edid);
- else {
- edid = drm_get_edid(connector, &port->aux.ddc);
- }
+ drm_edid = drm_edid_dup(port->cached_edid);
+ else
+ drm_edid = drm_edid_read_ddc(connector, &port->aux.ddc);
drm_dp_mst_topology_put_port(port);
+
+ return drm_edid;
+}
+EXPORT_SYMBOL(drm_dp_mst_edid_read);
+
+/**
+ * drm_dp_mst_get_edid() - get EDID for an MST port
+ * @connector: toplevel connector to get EDID for
+ * @mgr: manager for this port
+ * @port: unverified pointer to a port.
+ *
+ * This function is deprecated; please use drm_dp_mst_edid_read() instead.
+ *
+ * This returns an EDID for the port connected to a connector,
+ * It validates the pointer still exists so the caller doesn't require a
+ * reference.
+ */
+struct edid *drm_dp_mst_get_edid(struct drm_connector *connector,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port)
+{
+ const struct drm_edid *drm_edid;
+ struct edid *edid;
+
+ drm_edid = drm_dp_mst_edid_read(connector, mgr, port);
+
+ edid = drm_edid_duplicate(drm_edid_raw(drm_edid));
+
+ drm_edid_free(drm_edid);
+
return edid;
}
EXPORT_SYMBOL(drm_dp_mst_get_edid);
diff --git a/include/drm/display/drm_dp_mst_helper.h b/include/drm/display/drm_dp_mst_helper.h
index 5be96a158ab2..f962e97880b4 100644
--- a/include/drm/display/drm_dp_mst_helper.h
+++ b/include/drm/display/drm_dp_mst_helper.h
@@ -138,7 +138,7 @@ struct drm_dp_mst_port {
* @cached_edid: for DP logical ports - make tiling work by ensuring
* that the EDID for all connectors is read immediately.
*/
- struct edid *cached_edid;
+ const struct drm_edid *cached_edid;
/**
* @fec_capable: bool indicating if FEC can be supported up to that
@@ -819,7 +819,12 @@ drm_dp_mst_detect_port(struct drm_connector *connector,
struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_port *port);
-struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
+const struct drm_edid *drm_dp_mst_edid_read(struct drm_connector *connector,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port);
+struct edid *drm_dp_mst_get_edid(struct drm_connector *connector,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port);
int drm_dp_get_vc_payload_bw(const struct drm_dp_mst_topology_mgr *mgr,
int link_rate, int link_lane_count);
--
2.39.2
