Commit ced63326 authored by Oliver Barta's avatar Oliver Barta Committed by Rodrigo Vivi

drm/i915: HDCP: fix Ri prime check done during link check

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: default avatarOliver Barta <oliver.barta@aptiv.com>
Fixes: 2320175f ("drm/i915: Implement HDCP for HDMI")
Reviewed-by: default avatarRamalingam C <ramalingam.c@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200328104100.12162-1-oliver.barta@aptiv.com
(cherry picked from commit 3ffaf56e)
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent e1eb075c
......@@ -1536,7 +1536,8 @@ bool intel_hdmi_hdcp_check_link(struct intel_digital_port *intel_dig_port)
intel_de_write(i915, HDCP_RPRIME(i915, cpu_transcoder, port), ri.reg);
/* Wait for Ri prime match */
if (wait_for(intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder, port)) &
if (wait_for((intel_de_read(i915, HDCP_STATUS(i915, 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",
intel_de_read(i915, HDCP_STATUS(i915, cpu_transcoder, port)));
......
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