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The predicate source registers are needed to implement conditional rendering without stalling. The two source registers are used to load the previous values of the PS_DEPTH_COUNT register saved from PIPE_CONTROL commands. These can then be compared and used to set the predicate enable bit via the MI_PREDICATE command. The command parser version number is increased to 2 to make it easier to detect the new functionality in user space. Signed-off-by: Neil Roberts <neil@linux.intel.com> Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com> (v1) Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> (v1) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
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