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<
klange >
[this is not a case of it reporting >100%, as there's two cores here; my laptop was showing 100.5% on the plasma demo's render thread]
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<
clever >
klange: i finally figured out the power gating for the 3d core, and can now begin baremetal 3d code
01:32
<
klange >
I've been thinking about doing a virgl backend for my compositor, but I don't think I'll manage to get actual 3d stuff running on, say, the Intel GPU on the ThinkPad.
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clever >
i happen to already be familiar with the 3d core on the rpi, from past projects
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clever >
and i have a demo that just opens /dev/mem and hammers away at it
01:33
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clever >
all i really need to do, is swap out the routine for rendering the final bitmap output
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clever >
that reminds me, LK isnt accounting for irq time currently
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clever >
so irq's that dont context-switch, just wind up getting blamed on a random thread
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clever >
ok, so thats all of the state and control structures, and the final output buffer
01:57
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clever >
now i just need to tell the 3d hw to obey the control structures!
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clever >
klange: heh, the next big hurdle, is that i'm lacking sin and cos function!
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klange >
clever: I have a portable table-based pair if you want a starting point.
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clever >
ah, i found a hack
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<
clever >
if i build it with -O, gcc figures it out at compile time
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clever >
since the inputs are currently static
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klange >
meanwhile I addressed my issue by just... having ps add thread cpu usage to the process leader if not queried with -T
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clever >
that works
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clever >
now that i have the vertex data filled in, i should be able to just hit a couple control regs, and its done
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clever >
klange: and only now, 7 years later, do i notice, i put 8000 into the original 3d driver, when i meant to put 0x8000, lol
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clever >
i'm surprised it even worked
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clever >
Fatal VPU Exception: Bad L2 alias
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clever >
klange: but things fail like this, the instant i try to begin a render
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clever >
its failing inside a printf function, while parsing the format string
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