<steev>
Cheaterman: oh, thanks for that patch, gonna try it here with my waveshares which seem to be the only displays i have with broken edids
<steev>
i used to have a SOYO monitor when i was at Genesi that we kept around specifically because the edid was so crazy and incorrect
<steev>
and yeah, gentoo isn't nearly as insane or crazy as it used to be. i definitely miss it
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<steev>
Cheaterman: also have you considered submitting it upstream so that everyone gets it, not just people using tobetter's fork? :D
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<steev>
hm, doesn't seem to help here, at least, not with the 1080x1920 version
<steev>
or i screwed up the patch
<steev>
hm, okay so with Cheaterman's patch, and my patch to lower the bounds of what is a bad mode, the 400x1280 waveshare works, though its top pixels are shifted down about 10 or so
<steev>
now to figure out why the 1080x1920 doesn't
<steev>
oh
<steev>
i bet
<steev>
the upper vertical size is 1600 (with the 2K display support patch), so make that 1920, since the waveshare 5.5" amoled is 1080x1920...
<steev>
oh, and also the fact that it has the wrong margins somehow
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<Cheaterman>
steev: It's such a trivial patch and the issue has been around for so long that I'm very surprised it wouldn't be in patchwork somewhere
<Cheaterman>
The jiggles you're getting are pretty weird ; does the _exact same_ mode work on the same screen when driven by other devices?
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<steev>
As far as I know, yes - I can plug it in to a windows box with no issue, likewise the thinkpad x13s via a usb-c to hdmi adapter, additionally, on the others, there’s no issue with the margins
<xdarklight>
not saying that it's the fix for your issue - but maybe it can give you a starting point
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<Cheaterman>
I see that people are sadly sharing old fixes that have never been mainlined so I figured I'd ask
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<Cheaterman>
I'm getting freezes on N2+, oopses with vblank timeouts, or axg-tdm-iface audio-controller-1: ASoC: error at snd_soc_component_set_bias_level on audio-controller-1:
<Cheaterman>
I'm doing UI stuff so I need the display to be updated at reliable interval, sadly these freezes are in the way
<Cheaterman>
The one that's obviously sound-related can be worked around by removing audio sources from the application I run
<Cheaterman>
but I don't think the vblank timeouts are audio related (they occured at a point where no audio was playing)
<Cheaterman>
If you search for the exact error message I gave above about audio, you'll find literally ONE Google result
<Cheaterman>
lands me on this, user reporting the same issue (and UI freezes) but no fixes
<Cheaterman>
So, thanks in advance if anyone has clues about this :)
<Cheaterman>
Oh also panfrost gpu sched timeout
<Cheaterman>
again no clue whether/how all of these are related, i just know they cause display freezes and I'd like to fix that
<Cheaterman>
Dunno if it's a real thing but it almost feels like there's some power management going on, and whatever handles hdmi audio encoding (or something like that) takes a while to wake up
<Cheaterman>
but once it's awake it responds quickly until it becomes inactive for a while
<Cheaterman>
or something to that effect
<Cheaterman>
possibly an "auto" i could change to "on" in sysfs
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<steev>
Cheaterman: old fixes that were never mainlined because... people assume it's trivial and/or already in a patchwork somewhere :P
<Cheaterman>
could be, but I don't see anything like that in tobetter fork's issues
<Cheaterman>
or PRs
<steev>
oh i was being a bit sarcastic, like when i suggested you submit your patch for mainline and you said it's probably already in a patchwork somewhere - others could be doing the same thing, or not have the time to chase down/fix up any mainline code review requests, and just wanted things to work for them. the amlogic stuff isn't particularly heavy traffic, and you don't even need to be subscribed to the mailing list
<steev>
xdarklight: hm, okay, i see, i'll give something along those lines a whirl
<steev>
hm, 12 was still really jumpy on the 1080x1920, but taking it back to the original 4 pre AFBC patch works, may need to bump it a bit higher... i don't know what AFBC is, or if i'm using it here so...
<steev>
added bonus is that the pixels don't seem to be off anymore
<xdarklight>
steev: AFBC is "Arm Frame Buffer Compression". IIRC it's used when importing a decoded video stream onto the display - for high resolutions this can consume a lot of memory bandwith. AFBC is supposed to save memory bandwidth by compressing the data between the video decoder and display IPs
<steev>
ah, hm, okay so play a video and see if it makes things go very bad
<xdarklight>
more like "decode a video through the VDEC (video decoder IP) and pipe it using zero-copy to the display output"
<steev>
that is above my skillset/knowledge level
<xdarklight>
I also haven't tried the video decoder myself. if Neil doesn't reply here you can try sending the patch as RFC (request for comments) and get some feedback from him on the mailing list
<steev>
that's a good idea as well
<steev>
xdarklight: an interesting side effect is that the pixels aren't pushed all off anymore with that change?
<xdarklight>
steev: I've no idea why that would be but I'm happy for you if that's a welcome side-effect :)
<Cheaterman>
steev: yeah but at least I 1/ tested Neil's fix instead of staying on mine, 2/ came here to report results, 3/ updated my issue on tobetter's fork and 4/ included the patch
<steev>
:)
<Cheaterman>
Not perfect for sure but I think I'm being a good steward of the ecosystem
<steev>
oh please don't take it as a criticism at all, i'm 100% guilty of things, and was just teasing, you have no idea how much i appreciate that patch
<Cheaterman>
There's another fun issue BTW that could be tangentially related to what you're experiencing
<Cheaterman>
Some sort of off-by-one error in the framebuffer or something
<steev>
very possible
<Cheaterman>
one pixel row that should be at top is at the bottom, and one pixel column that should be on the left is on the right
<Cheaterman>
Nobody noticed so I didn't investigate too much but it probably will need fixing
<steev>
with the afbc related patch xdarklight mentions, i don't see that here (you can check the last 2 videos, i zoom in on the corners
<Cheaterman>
From what I read above of what AFBC should do, it should be unrelated, I'm observing this both on X11 desktop and in my apps, it's also worth noting I often use display rotation (eg portrait) for work stuff
<steev>
though, that's the 5.10 branch, 5.19 isn't wanting to boot here for me, and that's my main testing device so i haven't looked into it
<Cheaterman>
so perhaps it's less obvious or not exhibited at all on normal rotation
<steev>
the fwiw, both of the videos are with the monitors being rotated via "fbcon=rotate=1"
<Cheaterman>
but either way I sadly can't pipe decoded video straight to display because I do GLES stuff ; it would be neat if that could be piped directly to GPU though, as a GLES texture
<Cheaterman>
oh, I rotate in X11
<steev>
oh, actually, i do both
<Cheaterman>
It would be a bit inconvenient to use a kernel cmdline for that in my case
<Cheaterman>
for me it's pretty old school setup hahaha... gentoo, openrc, x11, openbox (just because some apps might need a WM that respects eg full screen hints and whatnot)
<Cheaterman>
a tweaked inittab for autologin in tty, a tweaked bashrc that starts X
<Cheaterman>
steev: considering what you're displaying it would actually be pretty hard to tell!
<Cheaterman>
what i advise is fullscreen video
<steev>
yeah, i need to find something decent to check
<steev>
something that isn't a *cough* home video *cough*
<Cheaterman>
what's your machine BTW, N2+ like me?
<steev>
radxa zero
<Cheaterman>
lol home video haha
<Cheaterman>
S905Y2
<steev>
yeah
<Cheaterman>
G31 instead of my G52
<Cheaterman>
it may or may not have the same bugs, I take it it's not quite the same module
<steev>
mali and bugs, name a more iconic duo
<Cheaterman>
lol
<Cheaterman>
IKR.... but see I'll take something fast that has a few bugs anyday
<Cheaterman>
As I said earlier I'm really tired of VideoCore haha
<Cheaterman>
and generally Broadcom stuff
<Cheaterman>
Reminds me
<steev>
but seriously, i really do appreciate all the workings, i'm able to now plug in either the 1080x1920 or 400x1280 and have the display work (althuogh i do need to reboot between them)
<Cheaterman>
on an app we developed for XU4 we had refresh issues
<Cheaterman>
I fixed it by having a permanently "blinking" transparent pixel (0-0.0001 alpha) in a corner
<Cheaterman>
I don't mind these hacks, honestly, if it means the whole thing performs twice as fast as a Pi
<Cheaterman>
Yeah that's pretty good news! Although the reboot is less than ideal
<Cheaterman>
OTOH I suppose your G31 is covered by panfrost all the same as my G52
<steev>
it's also a bit odd (or maybe not, who knows) that one waveshare has to be 270 to be "bottom" opposite of hdmi, and the other 90
<Cheaterman>
So a large part of the bugs should be shared.... assuming they're not in silicon... hehe
<Cheaterman>
That's interesting indeed
<Cheaterman>
are you sure they're the exact same revision of the same model
<Cheaterman>
if so, that's really curious for sure
<steev>
no, they're not at all
<Cheaterman>
Oh, well, then anything's possible
<steev>
the one is 7.9" 400x1280, the other is 5.5" 1080x1920 :)
<Cheaterman>
Hahaha literally a different panel
<Cheaterman>
Then yeah it's not necessarily surprising
<steev>
yeah, i'd jus thave expected the manuf to realize that rotation bit but... i should know better from my time at genesi