EDP_PSR_CTL
val |= I915_READ(EDP_PSR_CTL) & EDP_PSR_RESTORE_PSR_ACTIVE_CTX_MASK;
I915_WRITE(EDP_PSR_CTL, val);
WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE);
I915_WRITE(EDP_PSR_CTL,
I915_READ(EDP_PSR_CTL) & ~EDP_PSR_ENABLE);
WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE);
val = I915_READ(EDP_PSR_CTL);
I915_WRITE(EDP_PSR_CTL, val & ~EDP_PSR_ENABLE);