17:07 <dinkelhacker> Hey i justed browsed through the repo and saw that there has already been some development been done on supporting reading out the armv8 mmu related registers like ttbr0_el1, tcr_el1, etc https://github.com/openocd-org/openocd/blob/master/src/target/armv8.c#L816 However it seems like those functions are unused. Does anybody know why?

19:37 <Xogium> borneoa_: howdy :) lightning quick question hopefully, do you have an ETA for kernel 5.15 on mp1 ? I huh might have run into an etnaviv bug in 5.10 which is kinda long in the tooth, hoping that 5.15 would fix this

19:37 <Xogium> gpu keeps hanging on me at random :/

19:38 <Xogium> to be fair don't know if its kernel related or not, but hoping it is

19:39 <Xogium> keep seeing messages like etnaviv doing MMU fault and kernel saying recover hung gpu

20:09 <borneoa_> Xogium: yes, the full update to 5.15 is cooking. I don't have the release date, but should be within this summer.

20:10 <borneoa_> Xogium: For ST release we don't use etnaviv but the binary driver from the vendor.

20:11 <Xogium> borneoa_: thanks :) god, I hope this solves my issue. Its so bloody hard to debug a touchscreen controlled device when you can,t see a damn thing and the only reason you know it works is if you by miracle manage to hit the play button of the audio player

20:11 <Xogium> ah yes, true. I forgot about that

20:12 <borneoa_> Xogium: have you checked what the new patches and fixes in etnaviv driver? Maybe you can easily back port something that looks promising

20:12 <borneoa_> Xogium: anyway the new version will include the source for etnaviv from the upstream 5.15

20:13 <Xogium> not yet. Honestly I'm a terrible code reader and I've not got much info

20:13 <Xogium> all I have are 3 error messages from the kernel, with no idea if its aetnaviv kernel driver issue, or userspace causing a problem which ultimately causes the kernel driver to bug

20:14 <Xogium> but from the looks of things that looks kind of bad

20:15 <Xogium> etnaviv-gpu 59000000.gpu: MMU fault status 0x00000002

20:15 <Xogium> etnaviv-gpu 59000000.gpu: MMU 0 fault addr 0xff957000

20:15 <Xogium> etnaviv-gpu 59000000.gpu: recover hung GPU!

20:16 <borneoa_> Xogium: unfortunately I have no idea about these errors

20:17 <Xogium> been trying to get this stuff working, my whole project that is, for several months and it's been one battle after another, bugs in gstreamer, bugs in wpewebkit or cog, and then this. I think the computer god doesn't want me to succeed XD

20:17 <borneoa_> Xogium: to debug the touchscreen, have you tried 'evtest'?

20:18 <borneoa_> Maybe there are other tool specific for TS, but evtest could be useful too

20:18 <Xogium> yeah evtest reacts to me tapping no problem

20:18 <Xogium> even if its just random taps

20:19 <borneoa_> Which kernel version are you using, right now?

20:19 <Xogium> the latest from st 5.10.61

20:19 <Xogium> haven't found any public repo with experimental 5.15 or anything so I figure it must be private until the work is done

20:21 <Xogium> I tried to use the vivante binaries but buildroot has them not providing gles or something, so selecting them instead of etnaviv disables wpewebkit and cog

20:23 <borneoa_> Xogium: 5.15 should still be internal only. The whole distro has to be completed before publishing it

20:23 <Xogium> yeah, that's what I thought and that makes perfect sense

20:24 <Xogium> well.. I suppose I'll wait for it

20:24 <Xogium> if it's just waiting that's fine :D not like getting hit by bugs one after another like I've been for the past nearly 6 months

20:25 <Xogium> well at least I helped people by reporting them :p

20:26 <borneoa_> I have checked in linux-stable git tree. There are 11 fixes for etnaviv between v5.10.61 and v5.10.119. usually should be easy to just cherry pick them. And if you are lucky the fix is already there

20:30 <Xogium> yeah that's an idea

20:34 <borneoa_> Take the top 11 patches from this link, and apply in reverse order , the 11th first. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/log/drivers/gpu/drm/etnaviv?h=linux-5.10.y

20:36 <borneoa_> This is based on 5.10.119. if Greg makes a new version you will probably need to take few patches more

20:36 <Xogium> huh, that's fancy

20:36 <Xogium> I didn't know how to do that

20:41 <borneoa_> So, start from 'drm/etnaviv: return context from etnaviv_iommu_context_get'. Click on it and in the new page there is the link for download it. Then unzip and patch your code. The move to next patch. You can even consider rebuild and test, if your error is easy to reproduce. And the commit message could help you understand what the patch is fixing

20:42 <Xogium> yeah

20:42 <Xogium> lots of stuff related to MMU so

20:43 <Xogium> considering I get MMU error

20:44 <Xogium> I wouldn't say its eays to reproduce, but I've ran into it for the third time today alone