drm/i915: HDCP: retry link integrity check on failure

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A single Ri mismatch doesn't automatically mean that the link integrity
is broken. Update and check of Ri and Ri' are done asynchronously. In
case an update happens just between the read of Ri' and the check against
Ri there will be a mismatch even if the link integrity is fine otherwise.

Signed-off-by: Oliver Barta <oliver.barta@aptiv.com>
Reviewed-by: Sean Paul <sean@poorly.run>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200504123524.7731-1-oliver.barta@aptiv.com

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Oliver Barta 2020-05-04 14:35:24 +02:00 • committed by Jani Nikula

parent 4003dac180

commit b08239b2f4

1 changed files with 16 additions and 3 deletions

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drivers/gpu/drm/i915/display/intel_hdmi.c

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