From 605a33e765890e4f1345315afc25268d4ae0fb7c Mon Sep 17 00:00:00 2001 From: Suraj Kandpal Date: Tue, 17 Dec 2024 14:07:23 +0530 Subject: [PATCH] drm/i915/hdcp: Fix Repeater authentication during topology change When topology changes, before beginning a new HDCP authentication by sending AKE_init message we need to first authenticate only the repeater. Only after repeater authentication failure, it makes sense to start a new HDCP authentication. Even though it made sense to not enable HDCP directly from check_link and schedule it for later, repeater authentication needs to be done immediately. --v2 -Fix comment grammatical errors [Ankit] Fixes: 47ef55a8b784 ("drm/i915/hdcp: Don't enable HDCP2.2 directly from check_link") Signed-off-by: Suraj Kandpal Reviewed-by: Ankit Nautiyal Link: https://patchwork.freedesktop.org/patch/msgid/20241217083723.2883317-1-suraj.kandpal@intel.com --- drivers/gpu/drm/i915/display/intel_hdcp.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index 7464b44c8bb36..c60b22aaa819e 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -2188,6 +2188,19 @@ static int intel_hdcp2_check_link(struct intel_connector *connector) drm_dbg_kms(display->drm, "HDCP2.2 Downstream topology change\n"); + + ret = hdcp2_authenticate_repeater_topology(connector); + if (!ret) { + intel_hdcp_update_value(connector, + DRM_MODE_CONTENT_PROTECTION_ENABLED, + true); + goto out; + } + + drm_dbg_kms(display->drm, + "[CONNECTOR:%d:%s] Repeater topology auth failed.(%d)\n", + connector->base.base.id, connector->base.name, + ret); } else { drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] HDCP2.2 link failed, retrying auth\n", -- 2.47.2