On Wed, Jul 18, 2007 at 11:18:15PM +0800, Antonino A. Daplas wrote:
> > > Currently if the refresh rate is not specified fb_find_mode() returns
> > > the first known video mode with the requested resoluion, which provides
> > > no guarantees wrt the refresh rate. Change this so that the mode with
> > > the highest refresh rate is returned instead.
> >
> > What refresh rate it sets when used on card or monitor without DDC?
>
> Yes, I noted this also while reviewing patches. fb_find_mode() is used
> predominantly with the 'generic' modedb which contains modes that are
> not specific to the card or monitor. And fb_try_mode() is not a
> guarantee that the returned refresh rate will be safe (we have a lot of
> drivers that do not check the timings against the display capabilities).
>
> It would be best that fb_find_mode() return the safest refresh rate
> (60Hz) instead of the highest.
How about modifying it so that it looks for a mode with the highest
refresh rate if either a non-generic modedb is used or
info.monspecs.{vfmin,vfmax,hfmin,hfmax,dclkmax} are all non-zero,
and for a mode with refresh rate closest to 60 Hz otherwise?
I'm sorry for the delayed reply.
Best regards.
--
Michal Januszewski JID: [email protected]
Gentoo Linux Developer http://people.gentoo.org/spock
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