On Tuesday, May 22, 2007, Benjamin Herrenschmidt wrote:
> On Tue, 2007-05-22 at 08:39 -0700, Jesse Barnes wrote:
> > The current code does its best to figure out what modes are available
> > and tries to pick a good one for each display. It sounds like you're
> > mainly concerned with the actual mode picking, not the mode and output
> > detection and enumeration? If so, that's a pretty easy change to
> > make. But if you're also worried about the kernel building mode
> > lists, then we'll have bigger changes to make...
>
> I'm worried that the EDID we get from the monitor is bogus and needs to
> be overriden.
>
> Now, if the kernel builds a mode list, that's find if we have a call to
> "feed" it with a replacement one later on from userland.
>
> In addition, there are all those monitors that cannot be probed (no
> DDC/EDID) and for which only userland can reasonably provide a mode or a
> mode list.
Yeah, we already have a call to add modes to the kernel's list, so we
should be covered.
> So it's a bit of both :-) Building an "initial" mode list from the EDID
> might be fair enough if we can replace it soon enough, but we still need
> to be very conservative about whatever boot mode we choose.
Right.
> > I'm not really sure how much of a problem broken EDIDs will be. The X
> > server only has a few quirks for broken EDIDs now, nothing major
> > afaict, and apparently the FB layer already has some code for handling
> > EDID quirks, so I don't think that'll be our biggest problem. So far,
> > it looks like handling laptop panels is a bit trickier (at least for
> > Intel chips)...
>
> Well, I've seen my share of broken EDID.. Last time I looked at Darwin,
> I think I saw Apple maintaining a fairly huge database of EDID
> replacements in userland...
Interesting... I wonder how the distro monitor databases compare.
Jesse
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
