BLC_PWM_CPU_CTL2
I915_STATE_WARN(I915_READ(BLC_PWM_CPU_CTL2) & BLM_PWM_ENABLE,
cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
tmp = I915_READ(BLC_PWM_CPU_CTL2);
I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
tmp = I915_READ(BLC_PWM_CPU_CTL2);
I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
POSTING_READ(BLC_PWM_CPU_CTL2);
I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);