<parco>
could this be something wrong with my panel driver?
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<parco>
looks like the ili9881c.c driver makes a call to "mipi_dsi_dcs_set_tear_on", which my panel does not have. I wonder if that is what's creating the VBLANK interrupts
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<parco>
or maybe because i don't have something installed in userland, like xorg
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<wens>
I think someone else encountered that. it was due to either incorrect timings or some bug in the dsi driver
<wens>
paulk-leonov: ^
<wens>
anarsoul: ^ you as well?
<anarsoul>
wens: ?
<anarsoul>
I don't remember any issues with binding my panel
<anarsoul>
parco: DSI is pretty sensitive to timings. If your timings are not correct you'll get no VBLANK interrupts
<parco>
anarsoul: ok great, i just wanted to nail it down to my actual driver
<parco>
i don't have any Xorg or the like installed though, will that be an issue?
<anarsoul>
yeah, no vblank interrupts will mean that any attempt to wait for vblank will timeout
<anarsoul>
it'll look like your system hangs for some time (30s?)
<parco>
Exactly
<parco>
then quickly spits out a bunch of stuff
<anarsoul>
fix your timings
<anarsoul>
:)
<anarsoul>
panel timings I mean
<parco>
so everything in my drm_display_mode struct?
<anarsoul>
yes
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<wens>
anarsoul: ah, wrong person then, might have been jernej
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<parco>
this is gonna take a bit of digging, not sure how to map "qcom,mdss-dsi-panel-timings" to actual values
<parco>
that still leaves me confused as to what would I expect to see if I don't have Xorg installed?
<parco>
will the console just magically appear :)
<wens>
Xorg is not needed to test panels. you can build libdrm, which has the `modetest` util
<parco>
ok thanks, i'll get that installed after my vblanks start coming in
<parco>
root
<parco>
woops :/
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<MartijnBraam>
Hello, I'm currently trying to get mainline linux working on my A10 tablet for the postmarketOS project but I can't get any kernel output
<MartijnBraam>
I compiled a mainline u-boot and got that working, I got it to the point where u-boot says "Starting kernel ..." but there's no output after that
<KotCzarny>
enable earlyprintk?
<MartijnBraam>
hmm I'll check if this kernel has EARLY_PRINTK enabled
<MartijnBraam>
Hmm the wiki says "Pretty much useless on sunxi since some u-boot specific mechanism of printing to u-boot enabled serial port is used anyway and duplicates the earlyprintk functionality. Might come handy if you want to use another port, however. "
<tautologico>
elros1: I think this is just what I need, will investigate further. Thanks a lot, I'm kinda cross-eyed from reading a lot of uboot source code recently :)