PANEL_8TO6_DITHER_ENABLE  219 drivers/gpu/drm/gma500/psb_intel_reg.h #define PANEL_8TO6_DITHER_ENABLE	(1 << 3)
PANEL_8TO6_DITHER_ENABLE 4789 drivers/gpu/drm/i915/i915_reg.h #define   PANEL_8TO6_DITHER_ENABLE (1 << 3)