The check was always succeeding even in case of a mismatch
due to the HDCP_STATUS_ENC bit being set. Make sure both
bits are actually set.
Signed-off-by: Oliver Barta <oliver.ba...@aptiv.com>
Fixes: 2320175feb74 ("drm/i915: Implement HDCP for HDMI")
---
drivers/gpu/drm/i915/display/intel_hdmi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c
b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 93ac0f296852..14912daad7ff 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -1526,7 +1526,8 @@ bool intel_hdmi_hdcp_check_link(struct intel_digital_port
*intel_dig_port)
I915_WRITE(HDCP_RPRIME(dev_priv, cpu_transcoder, port), ri.reg);
/* Wait for Ri prime match */
- if (wait_for(I915_READ(HDCP_STATUS(dev_priv, cpu_transcoder, port)) &
+ if (wait_for((I915_READ(HDCP_STATUS(dev_priv, cpu_transcoder, port)) &
+ (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC)) ==
(HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC), 1)) {
DRM_ERROR("Ri' mismatch detected, link check failed (%x)\n",
I915_READ(HDCP_STATUS(dev_priv, cpu_transcoder,
--
2.20.1
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