On Wed, Apr 2, 2014 at 5:52 AM, Archit Taneja <archit@xxxxxx> wrote: > Hi, > > I was trying to figure out how we are supposed to manage synchronization > between a mode_set and a page_flip called on a crtc. > > Say, if a mode_set is immediately followed by a page_flip. The driver can't > process the page_flip straight away since the hardware is still completing > the mode_set. I guess setcrtc is expected to be synchronous(ish).. so a lot of userspace won't expect the first pageflip to fail with -EBUSY. BR, -R > What is the driver supposed to do? Should it return -EBUSY? Or should it > somehow queue the page_flip task internally? > > A lot of libdrm applications seem to call mode_set, and call a page_flip > soon after it. They tend to bail out if page_flip returns an error, they > don't try to do another page_flip if it fails the first time. Is this okay > behaviour? > > Thanks, > Archit > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
