On Mo, 2015-05-18 at 09:51 +0200, Frederic Konrad wrote: > On 18/05/2015 09:34, Gerd Hoffmann wrote: > > On Mi, 2015-05-13 at 21:12 +0200, fred.kon...@greensocs.com wrote: > >> From: KONRAD Frederic <fred.kon...@greensocs.com> > >> > >> This allows to create a surface with a different format than xrgb8888. > > What is the use case for this? > > > > cheers, > > Gerd > > > > > > > Hi, > > The Display Port introduced in patch 7 and the driver use differents > pixel format. > eg: rgb565, RGB888, etc. see xilinx_dp_change_graphic_fmt in patch 7:
Ah, and dpdma scatterlists (patch 6) suggest the guest framebuffer is not contiguous in guest phyiscal memory, correct? So using guest memory as surface storage using qemu_create_displaysurface_from() doesn't work. But I think you can simply call qemu_create_displaysurface_from() with linesize=0 and data=NULL to make pixman allocate storage for you. cheers, Gerd
