[Intel-gfx] [PATCH 1/4] drm/i915: Configure the TV sense state correctly on GM45 to make TV detection reliable

[ykzhao]

On Wed, 2010-04-07 at 22:17 +0800, Adam Jackson wrote:
> On Wed, 2010-04-07 at 17:11 +0800, Zhenyu Wang wrote:
> > From: ykzhao <yakui.zhao at intel.com>
> > 
> > The TV detection logic is not reliable on the Cantiga platform.
> > Sometimes the TV will be misdetected as the following two cases:
> > - TV is misdetected on some laptops. e.g. There is no TV connector
> > port or no TV is attached. But the TV is shown as connected.
> > - TV connector type is misdetected. e.g. the component TV is
> > attached, but the TV is shown as S-video type.
> > 
> > According to the hardware requirement, the TV sense state bits of TV DAC
> > register should be cleared to zero on Cantiga platfrom.
> 
> Is it worth doing this for all platforms?  Seems like it can't hurt.

According to the spec it should be set on the 945GM and 965GM platform.
Anyway, we will try it on the other platform and see whether the TV can
be detected correctly.

thanks.
   Yakui
> 
> - ajax