On Tuesday 05 December 2017 10:45 AM, Sean Paul wrote:
+static
+bool intel_dp_hdcp_check_link(struct intel_digital_port *intel_dig_port)
+{
+ ssize_t ret;
+ u8 bstatus;
+ ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BSTATUS,
+ &bstatus, 1);
+ if (ret != 1) {
+ DRM_ERROR("Read bstatus from DP/AUX failed (%ld)\n", ret);
+ return ret >= 0 ? -EIO : ret;
+ }
+ return !(bstatus & DP_BSTATUS_LINK_FAILURE);
+}
as per link integrity check should cover other indication from the
repeater like
REAUTHENTICATION_REQUEST - request for reauth due to unauthenticated
state at downstream for some unknown reason
-Ram
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