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Sink can be configured to calculate the CRC over the static frame and compare with the CRC calculated and transmited in the VSC SDP by source, if there is a mismatch sink will do a short pulse in HPD and set DP_PSR_LINK_CRC_ERROR in DP_PSR_ERROR_STATUS. Spec: 7723 v6: andling DP_PSR_LINK_CRC_ERROR here and remove "bdw+" from commit message v4: patch moved to after 'drm/i915/psr: Avoid PSR exit max time timeout' to avoid touch in 2 patches EDP_PSR_DEBUG. v3: disabling PSR instead of exiting on error Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180626201644.21932-5-jose.souza@intel.com