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Jesse Barnes committed f796cf8f517
drm/i915: split enable/disable vblank code into chipset specific functions This makes the Ironlake+ code trivial and generally simplifies things. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Keith Packard <keithp@keithp.com>