When repeater notifies a downstream topology change, this patch reauthenticate the repeater alone without disabling the hdcp encryption. If that fails then complete reauthentication is executed.
v2: Rebased. v3: No Changes. v4: Typo in commit msg is fixed [Uma] v5: Rebased as part of patch reordering. Minor style fixes. v6: Rebased.
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Uma Shankar uma.shankar@intel.com --- drivers/gpu/drm/i915/intel_hdcp.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c index 0a14d8757346..6afce9ae09ed 100644 --- a/drivers/gpu/drm/i915/intel_hdcp.c +++ b/drivers/gpu/drm/i915/intel_hdcp.c @@ -1766,8 +1766,23 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) goto out; }
- DRM_ERROR("[%s:%d] HDCP2.2 link failed, retrying auth\n", - connector->base.name, connector->base.base.id); + if (ret == DRM_HDCP_TOPOLOGY_CHANGE) { + if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) + goto out; + + DRM_DEBUG_KMS("HDCP2.2 Downstream topology change\n"); + ret = hdcp2_authenticate_repeater_topology(connector); + if (!ret) { + hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED; + schedule_work(&hdcp->prop_work); + goto out; + } + DRM_ERROR("[%s:%d] Repeater topology auth failed.(%d)\n", + connector->base.name, connector->base.base.id, ret); + } else { + DRM_ERROR("[%s:%d] HDCP2.2 link failed, retrying auth\n", + connector->base.name, connector->base.base.id); + }
ret = _intel_hdcp2_disable(connector); if (ret) {