Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) TODO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) . Where should we do eviction (detatch_pages())?  We aren't necessarily
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)   accessing the pages via a GART, so maybe we need some other threshold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)   to put a cap on the # of pages that can be pin'd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)   . Use mm_shrinker to trigger unpinning pages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)   . This is mainly theoretical since most of these devices don't actually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)     have swap or harddrive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) . GEM/shmem backed pages can have existing mappings (kernel linear map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)   etc..), which isn't really ideal.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) . Revisit GEM sync object infrastructure.. TTM has some framework for this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)   already.  Possibly this could be refactored out and made more common?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)   There should be some way to do this with less wheel-reinvention.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)   . This can be handled by the dma-buf fence/reservation stuff when it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)     lands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) Userspace:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) . git://anongit.freedesktop.org/xorg/driver/xf86-video-omap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) Currently tested on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) . OMAP3530 beagleboard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) . OMAP4430 pandaboard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) . OMAP4460 pandaboard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) . OMAP5432 uEVM