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 ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
