Hi, > >We could also do it the other way around: Instead of having the kernel > >returning > > >the plane description userspace could pass it in, and the kernel throws > >-EINVAL in > > >case it doesn't match due to things having changed meanwhile. > > Or just return a dmabuf based on the current plane ?
If gvt is able to hand out dma-bufs for inactive planes, then yes, we can do this. Have one ioctl where we pass in the plane id, get back a plane description struct, and another where we pass in the plane description struct and get back a dma-buf fd. cheers, Gerd