On Mon, Nov 11, 2013 at 11:12:57AM +0200, Jani Nikula wrote:
> From: Ben Widawsky
>
> Prior to Haswell the CPU control register for backlight
> (BLC_PWM_CPU_CTL) toggled the PCH baclight pin for us. This made some
> sense as there was no pin on the CPU. With Haswell came the introduction
> of a C
From: Ben Widawsky
Prior to Haswell the CPU control register for backlight
(BLC_PWM_CPU_CTL) toggled the PCH baclight pin for us. This made some
sense as there was no pin on the CPU. With Haswell came the introduction
of a CPU backlight pin, but the interface was still controlled by
software with
