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078a033f45
BLC_PWM_CTL2 is for 965+ only, so add device model check for legacy backlight control. For native backlight control, it maps the backlight value (0~255) in opregion ASLE[BCLP] to backlight duty cycle (0~max_backlight) and set into control register. It also add support for IGD device, which follows opregion spec. Signed-off-by: Li Peng <peng.li@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> |
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