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The bspec was updated a couple weeks ago to add an extra block per line to plane watermark calculations for linear pixel formats. Bspec update 115327 description: "Gen9+ - Updated the plane blocks per line calculation for linear cases. Adds +1 for all linear cases to handle the non-block aligned stride cases." Cc: Lyude <cpaul@redhat.com> Cc: drm-intel-fixes@lists.freedesktop.org Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1470344880-27394-1-git-send-email-matthew.d.roper@intel.com Reviewed-by: Lyude <cpaul@redhat.com>