--- Felix Kühling <[EMAIL PROTECTED]> wrote: > On Sun, 19 Sep 2004 12:46:13 -0400 > Jon Smirl <[EMAIL PROTECTED]> wrote: > > > On Sun, 19 Sep 2004 14:45:37 +1000, Benjamin Herrenschmidt > > <[EMAIL PROTECTED]> wrote: > > > One issue here... When we discussed all of this with Keith, we > wanted > > > a mecanism where the user can set the mode without "owning" the > device. > > > > The owning part is for multiuser systems. If I have four users logged > > into the same system I have to assign them ownership of their video > > devices so that they can't mess with each other. I want to avoid > > needing root priv to change the monitor mode. > > > > > Typically, with X: We don't want X itself to have to be the one > setting > > > the mode, but rather set the mode and have X be notified properly > before > > > and after it happens so it can "catch up". > > > > This is going to require some more thought. Mode setting needs two > > things, a description of the mode timings and a location of the scan > > out buffer. With multiple heads you can't just assume that the buffer > > starts at zero. There also the problem of the buffer increasing in > > size and needing to be moved since it won't fit where it is. > > > > Keith, how should this work for X? We have to make sure all DRI users > > of the buffer are halted, get a new location for the buffer, set the > > mode, free the old buffer, notify all of the DRI clients that their > > target has been wiped and has a new size. > > Sounds a lot like moving and resizing GL windows in X. A similar (if not I'd like to point out that this is not smooth on my system, exept for when using fglrx. When I move, or resize, a DRI window I get vary noticable(more then 10th second) stoped system, mouse updates aren't even recorded.
> the same mechanism) could be used here. Whenever a client takes the lock > and detects that someone else had the lock in the mean time it checks > for a new window position and size. Checking for a changed mode or frame > buffer layout would fit in nicely. AFAIK these kind of changes are > communicated through the sarea which is shared by all DRI clients, the > Xserver and the kernel driver, so the checks are pretty low cost (no > system calls or context switches required). > > You only have to take the lock before changing the mode. DRI clients and > X will detect the change when they take the lock the next time and > adjust to the new conditions. > > > > > I was wanting to switch mode setting into an atomic operation where > > you passed in both the mode timings and buffer location. > > > > -- > > Jon Smirl > > [EMAIL PROTECTED] > > | Felix Kühling <[EMAIL PROTECTED]> http://fxk.de.vu | > | PGP Fingerprint: 6A3C 9566 5B30 DDED 73C3 B152 151C 5CC1 D888 E595 | > > > ------------------------------------------------------- > This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 > Project Admins to receive an Apple iPod Mini FREE for your judgement on > who ports your project to Linux PPC the best. Sponsored by IBM. > Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php > -- > _______________________________________________ > Dri-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/dri-devel > __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php -- _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
