[Intel-gfx] [PATCH v9 04/19] drm/i915/hdcp: No HDCP when encoder is't initialized

Anshuman Gupta anshuman.gupta at intel.com
Mon Jan 11 08:11:05 UTC 2021

There can be situation when DP MST connector is created without
mst modeset being done, in those cases connector->encoder will be
NULL. MST connector->encoder initializes after modeset.
Don't enable HDCP in such cases to prevent any crash.

Cc: Ramalingam C <ramalingam.c at intel.com>
Cc: Juston Li <juston.li at intel.com>
Tested-by: Karthik B S <karthik.b.s at intel.com>
Reviewed-by: Ramalingam C <ramalingam.c at intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
 drivers/gpu/drm/i915/display/intel_hdcp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index b9d8825e2bb1..7d63e9495956 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -2106,6 +2106,12 @@ int intel_hdcp_enable(struct intel_connector *connector,
 	if (!hdcp->shim)
 		return -ENOENT;
+	if (!connector->encoder) {
+		drm_err(&dev_priv->drm, "[%s:%d] encoder is not initialized\n",
+			connector->base.name, connector->base.base.id);
+		return -ENODEV;
+	}

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