<alyssa>
that bit I identified as controlling a barrier with iterate instructions
<alyssa>
turns out we already handle that bit in applegpu
<alyssa>
labelled as 'forward'
<alyssa>
ie the bit that controls forwarding into the texture pipe
<alyssa>
Not sure how to reconcile these observations.
<alyssa>
so either that's not the forwarding bit, or there's something really spooky happening
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<alyssa>
lina: surely there's some way to get a fake headless display DRM device?
<alyssa>
(Just enough to start weston or sway and run the "on screen" cts tests)
<alyssa>
the hacky way being m1n1 reserving a carveout of ram and pretending there's a simpledrm framebuffer there
<alyssa>
(did we ever get simpledrm + kmsro working?)
<alyssa>
oh, I think vkms is the correct way to do this
<lina>
alyssa: The problem with kmsro is that it hardcodes what display controllers go with what drivers
<lina>
We do have a dummy framebuffer but it's not probing, I think something is messed up with the power domains since these devices don't actually have disp0
<alyssa>
lina: wdym
<alyssa>
mesa has a master list of known display controllers, as long as it's added to the list it should work
<alyssa>
kmsro just tries all the gpus
<alyssa>
example how to teach kmsro about a new display controller: a1ed056ee6334ac58ce5e8120818fb88ba696f85
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