[Intel-gfx] LPSS backlight control (Dell Venue 8 Pro)

Jani Nikula jani.nikula at linux.intel.com
Mon Jan 4 01:42:35 PST 2016

On Fri, 01 Jan 2016, "C. B." <cbrookes at gmail.com> wrote:
> Hello All,
> Re: http://lists.freedesktop.org/archives/intel-gfx/2015-April/065313.html
>>Recently I noticed another device Dell Venue 8 Pro (BYT-CR) which
>>should be using LPSS backlight control. There is already a LPSS PWM
>>chip driver in upstream kernel which should be used in this case. That
>>patch is for another day
> I would like to humbly register my interest in seeing this support
> added in. I have a Dell Venue 8 Pro running Linux and I'd like to be
> able to adjust the backlight.

Shobhit, any thoughts or news on LPSS backlight?

> I also noticed vbetool dpms control doesn't work either; not sure
> whether that's related?

It's expected vbetool does not work with i915. vbetool bypasses the
driver to access hardware registers owned by i915. It's also unrelated
to LPSS.


Jani Nikula, Intel Open Source Technology Center

More information about the Intel-gfx mailing list