If a HDCP repeater is detected with zero hdcp authenticated downstream devices, there are two option as below: 1. Dont continue on second stage authentication. Disable encryption. 2. Continue with second stage authentication excluding the KSV list and continue encryption on success. This patch adopts the option 1. Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_hdcp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c index 0021511ae4d7..182a3c8a4e4a 100644 --- a/drivers/gpu/drm/i915/intel_hdcp.c +++ b/drivers/gpu/drm/i915/intel_hdcp.c @@ -175,10 +175,10 @@ int intel_hdcp_auth_downstream(struct intel_connector *connector) return -EPERM; } - /* If there are no downstream devices, we're all done. */ + /* If there are no downstream devices, we're not encrypting. */ num_downstream = DRM_HDCP_NUM_DOWNSTREAM(bstatus[0]); if (num_downstream == 0) - return 0; + return -EINVAL; ksv_fifo = kzalloc(num_downstream * DRM_HDCP_KSV_LEN, GFP_KERNEL); if (!ksv_fifo) -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
