<imirkin>
ah, didn't know about the existence of that
<airlied>
not sure it does beyond the slides :-P
<alyssa>
if i maintained llvm i would nak that since the code consuming ptx is proprietary...
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* alyssa
grumpy
<alyssa>
we can't all be airlied and danvet...
<airlied>
we should propose some stuff for jekstand to get NAK practice in :P
<alyssa>
airlied: hmmmmm I can start writing a driver for a Mali that doesn't exist, that seems NAK worthy :-p
<airlied>
alyssa: just port llvmpipe to an imaginary risc-v
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<alyssa>
airlied: why risc-v? i was thinking of adding fp64 extensions to 6502 and running llvmpipe on that...
<jekstrand>
Why do I need to start NAKing more things?
<jekstrand>
I've thought about writing a NIR -> PTX back-end...
* jekstrand
runs
* zmike
would rather have nir -> smoked pork shoulder
<zmike>
work on things that matter, jason.
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<jekstrand>
zmike: Like what? Reviewing your patches? :-P
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<zmike>
I'm not sure how that's going to get us artisanally cooked meats?
<airlied>
need some sponsorship deal with a proscuito maker
<jekstrand>
zmike: I didn't go to Weta just to keep reviewing Zink patches. :-P
<zmike>
"keep" implies it's something you've been doing all along though, and everyone here knows that you've really been using that time to work on IVI systems for Big Automotive
<airlied>
I've definitely been using IVI time for zink review
<jekstrand>
Given the choices...
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<cheako>
I'm back, at 5am I crashed. I did learn that i3 also causes the vulkan overlay to reset(that's the swapchain being re-created, right?) the framerate is also randomized.
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<MrCooper>
cheako: yes, the same issues apply with Xorg, though in that case they can't be fixed in mutter alone; TBH I wouldn't bet on them ever getting fixed with Xorg
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<danvet>
jani, Re: [PATCH v2] drm/edid: Support type 7 timings <- yaroslav doesn't have commit rights, care to also push?
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<jani>
danvet: was waiting for anyone else chiming in, really
<jani>
but yeah, I'll push one of these days ;)
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<pq>
vsyrjala, why would it be nuts for a monitor to support bpc > 8 without "deep color", whatever that is?
<vsyrjala>
hdmi deep color is anything >8 bpc
<vsyrjala>
well, except ycbcr 4:2:2 which is some kind of weird exception in that it's always 12bpc (iirc) but not classified as deep color
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<pq>
ah, so "deep color" refers to bpc and not gamut, ok.
<krh>
vsyrjala: 12 bpp
<vsyrjala>
bpc in this case
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<vsyrjala>
which i guess ends up as average 24bpp due to the subsampling
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<krh>
vsyrjala: 4:2:2 just specifes the subsampling - uv plane is half width and height
<krh>
it doesn't say anything about the number of bits for y, u, or v channels, but typically it's 8, in which case you have 8 bits of y plus (8 + 8) / 4 of uv per pixel = 12 bpp
<krh>
of course there are 4:2:2 ycbcr formats with more than 8 bits per channel (P016, P010 etc) but ycbcr 4:2:2 isn't "always 12bpc"
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<graphitemaster>
I was reading the Intel patent on some neat thing in ARC
<graphitemaster>
They discuss something about rasterizing 3D images as opposed to 2D ones as seen in typical rasterizers and I dunno if I'm reading it wrong or that they're seriously extending traditional fragments to 3D fragments
<ishitatsuyuki>
is that related to texture space shading?
<graphitemaster>
If ARC does 3D fragments holy shit that's huge
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<graphitemaster>
I dunno
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<zackr>
danvet: was there ever a discussion about a graceful fallback when drm driver fails to load on probe? when the system boots with simplefb/efifb/simpledrm/etc and we switch to probe the hardware specific drm drivers they all start with remove_conflicting_framebuffers which removes the boot fb but now if we fail the probe the system is left without usable fb driver, i.e. blank screen. i'd like to restore the boot fb if probe on the hardware specific
<zackr>
driver fails
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<jekstrand>
mareko: I'm now an official wildcard/troll developer. :)
<alyssa>
TDD
<alyssa>
troll-driven development
<danvet>
zackr, I don't think we have that
<danvet>
ever discussed I mean
<danvet>
but maybe chat with tzimmermann and javierm, they're working a lot in this area
<tzimmermann>
zackr, doesn't exist
<marex>
pcercuei: hey, is this GiantPlus GPM940B0 panel really MEDIA_BUS_FMT_RGB888_3X8 or should it be MEDIA_BUS_FMT_RGB888_1X24 ?
<zackr>
tzimmermann: yea, i didn't see a clean way of doing it. i'd probably want to take a stab at figuring this out the next time i have a little bit of time
<zackr>
it's a corner case but it's rather painful when it happens
<tzimmermann>
zackr, once your driver is active, there's no way of going back to the old framebuffer. the old FB comes from bios/uefi/grub. we just take whatever we get
<tzimmermann>
before you touch registers or videomem, you want to kick-out the old state, so that it doesn't interfere
<tzimmermann>
i think the best you can do is to rearrange you rdriver code to do as many things as possible before touching hardware.
<pcercuei>
marex: 3x8, it's a 24-bit panel with a 8-bit bus
<zackr>
tzimmermann: couldn't drm utility code remember what it kicked off, return that info to the driver, and then driver do drm_restore_old_fb(previous_fb_state) which just forces reprobe of the old code? or is the issue that it would require the entire platform reinit?
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<jekstrand>
alyssa: You know it!
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<cheako>
MrCooper: thanks. To be clear, this is an issue if the app does not send frames fast enough? If I can fix the app, then I'm done?
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<tzimmermann>
zackr, probably a full reinit to make it reliable
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<cheako>
I guess when "zooming out"(what's that called in gnome?) a call to VkPresent returns out_of_date, paraphrasing as I just got up. I'm trying to build the most complete bug report I can and for that I need to know everything about what happens to an app during this zoom out.
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<cheako>
I've seen that it get's a blur event and I wonder if that's premature.
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<cheako>
How do I zero in on driver VS app if recreating the swapchain is the trigger?
<javierm>
zackr: what tzimmermann said. The best you can do is to put the remove conflicting buffers call at the most sensible place in the driver's probe function
<javierm>
zackr: that is, after some operations that may fail but before doing any setup of the hw
<javierm>
zackr: in fact, for some embedded devices that will only work with clk_ignore_unused, pd_ignore_unused, etc since gating clocks, regulators, etc could make the fw set-up FB to go away
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<MrCooper>
cheako: rather that an individual app frame takes so long to render that it slows down everything else as well
<cheako>
That's something to be expected, games running low FPS when in background.
<cheako>
I only have like 3 apps running, Steam, FF, and NMS.
<cheako>
VsCode.
<MrCooper>
low FPS when in background is separate, not related
<cheako>
I care only when NMS is foreground, it's annoying but something I can live with elsewhere.
<cheako>
ohh, I see.
<cheako>
Rather than fixing Gnome so it can handle an app misbehaving, I think it easier to stop the app from doing that.
<marex>
pcercuei: ahh , I see :)
<marex>
pcercuei: that;s unusual
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<pcercuei>
marex: I have 3 panels like that
<pcercuei>
marex: have a look at MEDIA_BUS_FMT_RGB888_3X8_DELTA too
<pcercuei>
it's like 3X8, but it's RGB on one line, BGR on the following one
<pcercuei>
and the pixel data has to be sent accordingly
<ajax>
it's what
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<ajax>
someone seriously built a boustrophedonic display
<pcercuei>
ajax: how many years did you wait to place this word in a conversation? ;)
<daniels>
ajax: how long have you been waiting to use that word?
<daniels>
ha ...
<ajax>
hahaha
<ajax>
who doesn't love fifty dollar words like that though
* imirkin
had to look it up
<imirkin>
me no speak good
<HdkR>
My primary language is C++, English I have to constantly check stackoverflow for how to speak :P
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<airlied>
tzimmermann: can you pick up the ast revert?
<tzimmermann>
airlied, which one?
<tzimmermann>
airlied, there was a revert for something abotu ast2600 and there was a regression recently
<imirkin>
afaik glReadPixels is meant to convert. this is pretty extreme though, so maybe not between float and int? i forget
<imirkin>
(in ES, that's absolutely not the case of course)
<imirkin>
been too long since i looked at the other funcs you're changing
<airlied>
If format is GL_STENCIL_INDEX and type is not GL_FLOAT, each index is masked with the mask value given in the following table. If type is GL_FLOAT, then each integer index is converted to single-precision floating-point format.
<airlied>
seems like it should work
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<zmike>
I've tested that it passes on drivers at least
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<airlied>
we off in the CI woods again? got hit by traces and now v3d taking too long, 3rd times a charm hopefully
<airlied>
just seem to take it's time, might be a bit overloaded, since when I opened the MR it had finished
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<alyssa>
airlied: debian-andorid failed in !14715
<alyssa>
in case you want to intercept Marge and retry
<cheako>
I've updated the description on my video https://youtu.be/QMBp0B9BCFQ it's centered on speaking to Hello Games, the devs of NMS.
<airlied>
alyssa: that one ist at least my fault :-P
<alyssa>
lol
<cheako>
I have become more adept at speaking about the issue. Where my current debugging has lead is that this is either the game or the driver, if it's the driver I should be able to reproduce this with something like renderdoc.
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<airlied>
oh get.c really not used to CONST floats