On Fri, Nov 04, 2011 at 12:59:59PM +0100, Thomas Hellstrom wrote: > Hi. > > I have a question about the semantics of the DRM_IOCTL_MODE_CURSOR iotcl: > > Some hardware (vmware's virtual in particular) may not be able to > pick up the changes from a bo directly, since the cursor data is > sent though the command stream. Hence we need a notification when > the cursor image has changed. > > Could we *require* that a cursor image change needs to be followed > by an ioctl call with the flag > DRM_MODE_CURSOR_BO?
On i915 we need the cursor in physical memory for some (old) platforms, which is seperate storage from the bo backing storage. So we have the same problem. We've solved it by intercepting pwrite ioctl calls and demanding that userspace only uses these for cursor updates. Is there a special reason you can't use such a driver-specific trick? -Daniel -- Daniel Vetter Mail: dan...@ffwll.ch Mobile: +41 (0)79 365 57 48 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
