From: Alan H. <al...@fa...> - 2007-06-17 20:19:58
|
On Wed, 2007-06-13 at 18:48 -0400, Kristian H=C3=B8gsberg wrote: > Hi, >=20 > I've finished the changes to the DRI interface that I've been talking > about for a while (see #5714). Ian had a look at the DRI driver side > of things, and ACK'ed those changes. I've done the X server changes > now plus a couple of GLX module cleanups, and I think it's all ready > to push: >=20 > http://gitweb.freedesktop.org/?p=3Dusers/krh/mesa.git;a=3Dshortlog;h=3D= dri2 and > http://gitweb.freedesktop.org/?p=3Dusers/krh/xserver.git;a=3Dshortlog= ;h=3Ddri2 >=20 > One thing that's still missing is Alan H's changes to how DRI/DDX maps > the front buffer. While the changes above break the DRI interface, > they only require an X server and a Mesa update. Alans patches change > the device private shared between the DDX and DRI driver and thus > requires updating every DRI capable DDX driver in a non-compatible > way. >=20 > I've been trying to understand the change better in order to try to > come up with a backwards compatible way to do the same. I think I've > found a way to let the DDX driver tell libdri not to map the > framebuffer and then do it itself. The problem is that Alans patch > also changes the DRI driver side of things to not map the front buffer > in the loader but in the driver code, based on extra info from the DDX > device private. >=20 > A compromise that will leave the DDX device private untouched is still > require the framebuffer info (handle and size etc) through > DRIGetDeviceInfo, but to not map the front buffer in the loader. > Instead we just pass the handle and size into the DRI driver (as we do > now), and the driver can then do the drmMap(). However, at this point > I'm wondering what the intention of the patch is and if my suggested > change somehow conflicts with that... help? Kristian, What you are suggesting sounds fine, but do you have patches to back up the suggested compromise so I can double check ?? Thanks, Alan. |