Messages in this thread | | | Subject | Re: [PATCH v3 9/9] drm/i915: Implement HDCP for DisplayPort | From | Ramalingam C <> | Date | Tue, 5 Dec 2017 20:00:57 +0530 |
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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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