866 	u32 pch_ctl1, pch_ctl2;  in lpt_enable_backlight()  local
868 	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);  in lpt_enable_backlight()
869 	if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {  in lpt_enable_backlight()
871 		pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;  in lpt_enable_backlight()
872 		I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);  in lpt_enable_backlight()
878 	pch_ctl1 = 0;  in lpt_enable_backlight()
880 		pch_ctl1 |= BLM_PCH_POLARITY;  in lpt_enable_backlight()
884 		pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;  in lpt_enable_backlight()
886 	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);  in lpt_enable_backlight()
888 	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);  in lpt_enable_backlight()
902 	u32 cpu_ctl2, pch_ctl1, pch_ctl2;  in pch_enable_backlight()  local
911 	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);  in pch_enable_backlight()
912 	if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {  in pch_enable_backlight()
914 		pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;  in pch_enable_backlight()
915 		I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);  in pch_enable_backlight()
932 	pch_ctl1 = 0;  in pch_enable_backlight()
934 		pch_ctl1 |= BLM_PCH_POLARITY;  in pch_enable_backlight()
936 	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);  in pch_enable_backlight()
938 	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);  in pch_enable_backlight()
1443 	u32 pch_ctl1, pch_ctl2, val;  in lpt_setup_backlight()  local
1445 	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);  in lpt_setup_backlight()
1446 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in lpt_setup_backlight()
1462 	panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) &&  in lpt_setup_backlight()
1473 	u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;  in pch_setup_backlight()  local
1475 	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);  in pch_setup_backlight()
1476 	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;  in pch_setup_backlight()
1494 		(pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0;  in pch_setup_backlight()