Re: No HDMI output on AC100

[Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>]

On Saturday 08 June 2013 18:05:52 Lucas Stach wrote:
> Am Samstag, den 08.06.2013, 16:21 +0200 schrieb Thomas Meyer:
> > > On Saturday 08 June 2013 10:33:55 Thomas Meyer wrote:
> > >> Kernel version: 3.10.0-0.rc4.git0.1.fc20.armv7hl
> > >> 
> > >> This is the latest Fedora ARM kernel. Config is available here:
> > >> http://pkgs.fedoraproject.org/cgit/kernel.git/tree/config-armv7
> > >> 
> > >> This is what I see in the kernel log:
> > >> 
> > >> $ dmesg |grep hdmi
> > >> [   33.403417] tegra-hdmi 54280000.hdmi: failed to get VDD regulator
> > >> [   33.403441] platform 54280000.hdmi: Driver tegra-hdmi requests probe
> > >> 
> > >> any ideas?
> > > 
> > > is the regulator (tps6586x) build-in?
> > 
> > No, it's a module.
> > 
> > > The make everything a module path isn't
> > > well tested I guess.
> 
> It's not the problem here. The driver requests to be probed again and
> comes up once the regulator is there.
> 
> Though the pixel clock looks odd for a HD HDMI monitor. Try looking at
> the Xorg log to see what mode of your monitor get's chosen and why it
> fails.

I just checked myself. Found that tps6586x-regulator module can't be 
autoloaded, so I connected my TV, booted and modprobed the module by hand.
All works more or less fine, so probe deferral is no problem.

Thomas, did you add cma=64M to you kernel command line? HDMI needs some 
memory.

Marc