6.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
[ Upstream commit 448060463198924c0a485e7e1622fa8a9c03cf3e ]
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 <suraj.kandpal@xxxxxxxxx>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241217083723.2883317-1-suraj.kandpal@xxxxxxxxx
(cherry picked from commit 605a33e765890e4f1345315afc25268d4ae0fb7c)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 8fee26d791f4f..3bf42871a4f08 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -2180,6 +2180,19 @@ 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",
--
2.39.5
