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<konradybcio> bamse new clues wrt 8250.. dp_phy clocks delay probing of dispcc to the very end, after remoteprocs et al..
<konradybcio> with all mdss clocks pinned "useful" by simplefb, removal of dp_phy from dispcc clock sources and who knows what else I can get some garbage on my screen and a whole lot of dpu errors like this https://pastebin.com/0Vr1WeJd
<konradybcio> and sometimes with gigatons of mmu ctx faults
<konradybcio> and "dsi_err_worker: status=c"
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<konradybcio> ok so the problem is more serious and it started on 5.13 it seems
<konradybcio> 8998 works well on 5.12, but rebasing the same patches on 5.13 breaks stuff
<konradybcio> 8998 with dpu needless to say, MDP5 works fine
<konradybcio> (on 630, 8976 and 8996)
<konradybcio> he also gets problems enabling the clocks
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<konradybcio> latest -next is no change
<konradybcio> 20210618
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<bamse> konradybcio: so are you perhaps hitting the problem that you don't get MDSS_GDSC, because you get a timeout instead of probe defer?
<konradybcio> no, mdss_gdsc has to be on from cont_splash
<bamse> right, but if dispcc doesn't probe in time, the mdss might fail to acquire MDSS_GDSC
<bamse> if it reprobes before dispcc
<konradybcio> I don't think I get what you mean
<konradybcio> for the dispcc late probe problem, I was able to deduce that dp_phy is the culprit
<konradybcio> for the general 8250dpu brokenness, I have no idea what's the cause
<bamse> yeah, but the fact that dp_phy probes late is not allowed to be a problem...because it is a module and supposed to probe late
<bamse> konradybcio: what i'm saying is, are you sure you don't have "deferred probe timeout, ignoring dependency" in your log
<bamse> from driver_deferred_probe_check_state()
<bamse> which results in a completely broken system
<konradybcio> I can check again but I am pretty sure it's not there
<bamse> okay, that's usually what i end up at whenever i have any of the core providers probe deferring
<konradybcio> actually there's something like this
<bamse> sorry, i don't have any more suggestions without digging into it properly :/
<konradybcio> I wonder if more devices are affected..
<bamse> you mean other than just this particular phon?
<konradybcio> yep
<bamse> phone*
<konradybcio> if 8250 has issues, 8150 should too
<konradybcio> and we know 8998 has them too
<bamse> as i said, the fingerprint is identical to that i have on rb3 (845)
<bamse> i don't have this issue on sc8180x - which clockwise is a sm8150
<konradybcio> :|
<bamse> but i did hit the issue with dispcc not being probed yet a few times...but then it disappeared again
<konradybcio> nothing makes sense anymore, great
<bamse> i bet the mtp has continuous splash...so if i just enable display there i should be able to reproduce what you're seeing (in case rb5 doesn't i mean)
<bamse> trying to clean out a bunch of patches that are almost ready here...after that i think i can take a proper look, but it will take several days before i'm there :/
<konradybcio> well hopefully we can fix this