[PATCH 1/2] ARM: tegra: add Acer Chromebook 13 device tree

[thierry.reding@gmail.com (Thierry Reding)]

On Wed, Jan 14, 2015 at 08:02:25AM +0100, Tomeu Vizoso wrote:
> On 14 January 2015 at 01:32, Dylan Reid <dgreid@chromium.org> wrote:
> > On Tue, Jan 13, 2015 at 9:49 AM, Tomeu Vizoso <tomeu@tomeuvizoso.net> wrote:
> >> On 13 August 2014 at 03:56, Dylan Reid <dgreid@chromium.org> wrote:
> >>> The Acer Chromebook 13, codenamed "Big", contains an NVIDIA tegra124
> >>> processor and is similar to the Venice2 reference platform.
> >>>
> >>> The keyboard, USB 2, audio, HDMI, sdcard and emmc have been tested
> >>> and work on the 1366x768 models.  I haven't tried on the HD systems
> >>> yet.
> >>
> >> Hi Dylan,
> >>
> >> do you have any notes on how you tested audio? I have been fiddling a
> >> bit with amixer but haven't been able to get any sound from the
> >> speakers nor the headphones.
> >
> > I don't have any notes, and it's been a while since I tried it.  To
> > the best of my knowledge, I loaded the UCM config from the ChromeOS
> > tree manually with alsaucm, then enabled/disabled headphones from
> > there.
> >
> > https://chromium.googlesource.com/chromiumos/third_party/adhd/+/master/ucm-config/nyan/NVIDIA%20Tegra%20Venice2/
> >
> > The important stuff is all in the enable sequence of HiFi.conf
> >
> > Let me know if that helps.
> 
> Thanks, it does work fine now. Will submit that conf file upstream.

Out of curiosity, where is "upstream" for UCM configuration files? It'd
be interesting to collect files for other Tegra boards there. I find it
rather tedious figuring out time and time again what control needs to be
toggled to enable a certain output.

Stephen, since you undoubtedly have the most experience with upstream
audio, do you happen to know if we have something like that for the
other upstream-supported boards?

Thierry
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