drm/i915: Extract i845_cursor_ctl() and i9xx_cursor_ctl()
Pull the code to calculate the cursor control register value into separate functions. Allows us to pre-compute them in the future. Signed-off-by:Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170317211808.14693-8-ville.syrjala@linux.intel.comReviewed-by:
Chris Wilson <chris@chris-wilson.co.uk>
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