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<
alexvf>
ssvb: good morning, are you there?
<
ssvb>
alexvf: yes, I'm here
<
alexvf>
ssvb: i was making tests with dram setings
<
alexvf>
but none fixed the sprite shaking issues
<
alexvf>
did you try the test program i gave you to try to reproduce it?
<
ssvb>
not yet, I haven't been doing anything sunxi related for weeks
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<
alexvf>
it's just that i don't know what more can i test, maybe you have some advice
<
alexvf>
but i'm starting to lose any hope
<
ssvb>
yes, it could be an unresolvable hardware limitation
<
alexvf>
since sprites layer can only use DEBE and it seems broken ...
<
ssvb>
DEBE in A20 is not too bad, or at least it is better than in A10
<
ssvb>
does the sprites layer really use DEBE?
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<
ssvb>
if it exhibits different behavior, I wonder if it could be actually using some different host port (neither DEBE, not DEFE)?
<
alexvf>
but i don't see any sprite controller host port or anything related that i can tweak
<
alexvf>
well, i'm not sure, in the A20 manual it seems a totally different controller
<
alexvf>
actually, there are some unused/unknown host ports
<
alexvf>
could it be one of them which affects sprites?
<
ssvb>
yes, the "5.4.2. Display Engine Block Diagram" in the A20 manual seems to show that the sprite controller probably has its own path to memory
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<
ssvb>
one of the dram controller host ports could be allocated to the sprite controller
<
alexvf>
do you mean one of the undocumented?
<
alexvf>
ok, i will try
<
alexvf>
to minimize the unmber of tests
<
alexvf>
do you have a magic number that should make it?
<
ssvb>
you can try to disable host ports one at a time, to check if one of them breaks the sprite layers
<
alexvf>
i was raising and lowering CmdNmb and PrioLevel (even reserved bit)
<
ssvb>
just flip the bit 0
<
alexvf>
hmm, good idea
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<
alexvf>
ssvb: i will come back hopefully today or tomorrow and report any advance, thank you
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<
ssvb>
you could probably also ask Allwinner people, maybe they can share some information
<
alexvf>
sure, do you have any contact or should i just look for a support email address?
<
ssvb>
mripard_ may have some contacts
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<
alexvf>
ok, waiting for him to come back to computer :)
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<
WarheadsSE>
ssvb: ping re: xf86-video-fbturbo-git on Pi2/armv7h building
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