Re: [Intel-gfx] [PATCH] drm, drm/i915/lvds: Honour video= parameter to override LVDS fixed mode

Steven Newbury
2011-03-29T14:52:49Z

> > > > > On Tue, Mar 29, 2011 at 5:49 PM, Dave Airlie <airlied@gmail.com>
> > > > > wrote:
> > > > > > can you guys ask someone internally about it also, there is a
> > > > > > driver somewhere in Google also for driving the LVDS->HDMI
> > > > > > adapter but I'm not sure what i2c bus its hanging off.
> > > > > >
> > > > > > Dave.
> > > > >
> > > > >
> > > > > http://git.chromium.org/gitweb/?p=chrontel.git;a=tree
> > > > >
> > > > > may or may not be the thing.
> > > > >
> > > > > Dave.
> > > > I'll see if it works...
> > > Is there a public clone URI for that repo? I dont want to have to
> > > download the full ChromiumOS...
> > Okay, I guessed it right: http://git.chromium.org/git/chrontel.git
> Simply running the resulting executables didn't work, it fails to detect
> the chip, the code also references accesses through GPIO and seems it
> wants an nm10_gpio driver which isn't in my kernel tree. My board is an
> NM10 chipset system, as is the target "Cr48 Chrome Notebook" so it could
> well be the same hardware.

I cherry-picked the nm10_gpio driver from the ChromeOS kernel, but while it worked fine the chrontel driver still couldn't detect the chip:

XAUTHORITY=//home/mythtv/.Xauthority ./ch7036_monitor -v -p
./ch7036_monitor: starts
Found device ID 0xff
./ch7036_monitor: Fatal: Device ID 0xff not the expected 0x56

So either it isn't a ch7036 or I'm still not doing everything necessary to expose it.