[Intel-gfx] [PATCH] drm/i915: add an "off-dvi" HDMI audio mode

[Wu Fengguang]

On Fri, Jan 06, 2012 at 07:08:33AM -0800, Jesse Barnes wrote:
> On Fri, 6 Jan 2012 11:26:40 +0800
> Wu Fengguang <fengguang.wu at intel.com> wrote:
> 
> > Andrea,
> > 
> > Would you test this patch at convenient time?
> > 
> > Thanks,
> > Fengguang
> > 
> > ---
> > Subject: drm/i915: add an "off-dvi" HDMI audio mode
> > Date: Fri Jan 06 11:04:00 CST 2012
> > 
> > When HDMI-DVI converter is used, it's not only necessary to turn off
> > audio, but also to disable HDMI_MODE_SELECT and video infoframe. Since
> > the DVI mode is mainly tied to audio functionality from end user POV,
> > add a new "off-dvi" audio mode:
> > 
> > 	xrandr --output HDMI1 --set audio off-dvi
> > 
> > Reported-by: Andrea Arcangeli <aarcange at redhat.com>
> > Signed-off-by: Wu Fengguang <fengguang.wu at intel.com>
> > ---
> 
> My only complaint here is that off-dvi isn't an intuitive name.  We
> don't have any better way of detecting an HDMI->DVI converter with
> other EDID bits perhaps?

We have 

        intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);

which _should_ auto detect HDMI/DVI connections.

I guess Andrea ran into problem with that due to broken EDID. Anyway
I'll try to test if that drm_detect_hdmi_monitor() will ever work for
the HDMI/DVI monitors in my lab.

> A better name might be off-dvi-mode or off-dvi-only or something.

OK, will change to "off-dvi-mode".

Thanks,
Fengguang