[Intel-gfx] Flicker-free boot in DRM

[Adam Jackson]

On 10/31/11 2:43 PM, Keith Packard wrote:
> On Mon, 31 Oct 2011 12:56:58 -0400, Adam Jackson<ajax at redhat.com>  wrote:
>
>> Yeah, it won't be precise.  That's why there's PLL search code at all,
>> and why it has a fuzz factor for finding "good enough".
>
> Right, so we'll need a similar fuzz factor when deciding whether we
> actually need to flip modes or not. Makes me concerned that we'll be
> effectively ignoring minor changes in the mode, which will make tweaking
> dot clocks impossible.

I don't see why we'd need to use the same equality operator everywhere. 
  The case of "is userspace asking for a fine-tune" seems clearly 
distinguishable from "are the current panel timings close enough to what 
EDID asked for".

- ajax