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drm/i915/hdcp: disable the QSES check for HDCP2.2 over MST

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Like the patch to disable QSES for HDCP 1.4 over MST
https://patchwork.freedesktop.org/patch/415297/ the HDCP2.2 spec
doesn't require QSES as well and we've seen QSES not supported on a
couple HDCP2.2 docks so far (Dell WD19 and Lenovo LDC-G2)

Remove it for now until we get a better idea of how widely supported
QSES is and how to support it optionally.

Signed-off-by: Juston Li <juston.li@intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210127065034.2501119-4-juston.li@intel.com
This commit is contained in:
Juston Li 2021-01-26 22:50:34 -08:00 committed by Anshuman Gupta
parent 5b6a9ba9f6
commit ee0735ff46
1 changed files with 1 additions and 30 deletions

31
drivers/gpu/drm/i915/display/intel_dp_hdcp.c
View File

@ -698,30 +698,6 @@ intel_dp_mst_hdcp_stream_encryption(struct intel_connector *connector,
return 0;
}
static bool intel_dp_mst_get_qses_status(struct intel_digital_port *dig_port,
struct intel_connector *connector)
{
struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
struct drm_dp_query_stream_enc_status_ack_reply reply;
struct intel_dp *intel_dp = &dig_port->dp;
int ret;
ret = drm_dp_send_query_stream_enc_status(&intel_dp->mst_mgr,
connector->port, &reply);
if (ret) {
drm_dbg_kms(&i915->drm,
"[%s:%d] failed QSES ret=%d\n",
connector->base.name, connector->base.base.id, ret);
return false;
}
drm_dbg_kms(&i915->drm, "[%s:%d] QSES stream auth: %d stream enc: %d\n",
connector->base.name, connector->base.base.id,
reply.auth_completed, reply.encryption_enabled);
return reply.auth_completed && reply.encryption_enabled;
}
static int
intel_dp_mst_hdcp2_stream_encryption(struct intel_connector *connector,
bool enable)
@ -757,11 +733,6 @@ intel_dp_mst_hdcp2_stream_encryption(struct intel_connector *connector,
return 0;
}
/*
* DP v2.0 I.3.3 ignore the stream signature L' in QSES reply msg reply.
* I.3.5 MST source device may use a QSES msg to query downstream status
* for a particular stream.
*/
static
int intel_dp_mst_hdcp2_check_link(struct intel_digital_port *dig_port,
struct intel_connector *connector)
@ -781,7 +752,7 @@ int intel_dp_mst_hdcp2_check_link(struct intel_digital_port *dig_port,
return ret;
}
return intel_dp_mst_get_qses_status(dig_port, connector) ? 0 : -EINVAL;
return 0;
}
static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = {