Re: HDMi out on Venice2

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On Mon, May 5, 2014 at 1:32 PM, Thierry Reding <thierry.reding@xxxxxxxxx> wrote:
> On Mon, May 05, 2014 at 12:07:51PM -0700, Dylan Reid wrote:
>> Hi Thierry,
>>
>> Did you have to make any user-space changes to test the HDMI output on
>> Venice2?  I've got your recent patch series and see the hdmi device
>> being probed but I haven't figured out how to get X to use it.  I'm
>> using the sample rootfs that was posted for the Jetson board.
>
> I've used custom userspace, but I would expect regular X to work with
> the patches as well. The sample rootfs probably comes with only the
> NVIDIA Tegra X driver installed. Have you tried installing the
> xf86-video-modesetting driver? That should automatically use the HDMI
> output if it's connected to a monitor. If not you should still be able
> to manually configure the outputs using xrandr.

Thanks, I haven't gotten to the point where I can see a screen in
xrandr yet, I'll try to find some time to dig a little deeper this
week.

>
>> My goal is to be able to test the hdmi audio changes on this as well
>> as our downstream kernel.
>
> Note that while there's some code to support HDMI audio, nobody's ever
> tested this upstream and it's likely not to work. So I think there may
> be more work required to get that running. I can help out with that,
> it's been on my list of things to do for a while.

Understood, although what is upstream looks pretty similar to what is
in our tree so I'm optimistic =)

>
> Thierry
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