Hi David, On Tue, Aug 30, 2016 at 09:30:44PM +0200, David Herrmann wrote: > Hi Rob > IOW the device handover code somehow needs to know who was responsible > for the instantiation of the simple-framebuffer device, so it can tell > them to remove it again. On x86 there is only one place where those > can be instantiated. But on OF-based systems, it can be dynamically > instantiated in many places right now. I don't think that's true. There's the assumption that the bootloader will have set up the framebuffer and Linux just takes over. Even on ARM, you'll need to at least reserve the memory, grab the clocks and so on, and it needs to happen way before you can load overlays (for the buffer even way before the simple-framebuffer driver is probed). I don't see how we could use overlays with simple-framebuffer, unless we apply those overlays before linux starts, but then Linux basically doesn't care if it was an overlay or not, it's treated as a single DT. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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