[Intel-gfx] [PATCH] drm/i915: fix screen blank issue in TV detect

[Jesse Barnes]

On Mon, 14 Sep 2009 10:06:01 +0800
Zhenyu Wang <zhenyuw at linux.intel.com> wrote:

> On 2009.09.11 10:51:06 -0700, Eric Anholt wrote:
> > On Fri, 2009-09-11 at 13:19 +0800, Zhenyu Wang wrote:
> > > In load time, this one trys to detect TV by current encoder state
> > > instead of load-detect method. Because load-detect will set mode
> > > which disable VGA mode entirely, but couldn't restore back later.
> > > Destroy VGA mode which is the mode after system boot caused black
> > > screen problem, although load fbcon or X later could setup the
> > > mode on LVDS without problem.
> > > 
> > > That fixes screen blank issue seen on Macbook after boot and
> > > before fbcon or X kicks in, actually this affects all laptops
> > > with TV out, or without real port but our TV encoder probe fails
> > > to detect.
> > > 
> > > Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
> > 
> > I think a black screen after boot and before fbcon loads sounds
> > like the right behavior.
> > 
> 
> Really? So this looks like you want to force fbcon loading for kernel,
> I also thought that way, but I don't know if we can do that in i915
> module?

No, we don't need to force it.  It's up to the distro to load things at
the right time.

-- 
Jesse Barnes, Intel Open Source Technology Center