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

[Tomeu Vizoso]

On 15 January 2015 at 08:50, Thierry Reding <thierry.reding at gmail.com> wrote:
> On Wed, Jan 14, 2015 at 08:02:25AM +0100, Tomeu Vizoso wrote:
>> On 14 January 2015 at 01:32, Dylan Reid <dgreid at chromium.org> wrote:
>> > On Tue, Jan 13, 2015 at 9:49 AM, Tomeu Vizoso <tomeu at tomeuvizoso.net> wrote:
>> >> On 13 August 2014 at 03:56, Dylan Reid <dgreid at 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.

This is the best we have right now, TTBOMK.

http://git.alsa-project.org/?p=alsa-lib.git;a=tree;f=src/conf/ucm

Regards,

Tomeu

> 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