18:50 <Putti> Hi, I get on samsung s3 (i9305) graphics glitches in lineageos setup wizard but not after that. When the graphics totally hang I see error messages like: lima 13000000.gpu: mmu command 2 timeout

18:50 <Putti> and [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:34:plane-1] flip_done timed out

18:51 <Putti> I have disabled PM_DEVFREQ but that didn't help

18:51 <Putti> could this still be something related to bus clocks?

18:52 <Putti> the kernel I'm using is 5.7rc1

18:52 <Putti> and latest mesa3d master

18:55 <anarsoul> hi

18:55 <anarsoul> yeah, likely something's up with hardware

18:55 <anarsoul> try lowering gpu clock

18:56 <Putti> hmm, not quite sure how to do that, but will try to find out

18:56 <anarsoul> assigned-clock-rates in dts is the easiest way

18:57 <Putti> exynos4.dtsi contains clocks

18:59 <anarsoul> oh, it also has voltage regulator for gpu

18:59 <anarsoul> devfreq patches are not in 5.7-rc1 yet and moreover you don't have operation points

19:00 <anarsoul> so make sure your gpu runs at lowest frequency

19:05 <Putti> anarsoul, hmm, this has the bus and core clocks

19:05 <Putti> bus at highest, core at lowest?

19:06 <anarsoul> Putti: lima in 5.7-rc1 doesn't configure clock rate, so it uses default

19:06 <anarsoul> also you have a voltage regulator for GPU

19:06 <anarsoul> so you may be undervolting GPU if default voltage is too low for default clock rate

19:07 <anarsoul> as temporary workaround you can set clock rate in dts

19:07 <anarsoul> grep for assigned-clock-rates for examples

19:07 <anarsoul> I'm not sure if you can configure voltage in the same way

19:07 <Putti> anarsoul, so core clock? (I'm asking since there is also bus clock here)

19:07 <anarsoul> Putti: yes

19:08 <Putti> anarsoul, thanks a lot, I will try now :)

19:12 <xdarklight> anarsoul: Putti: lima devfreq missed the v5.7 cycle so it will only be part of v5.8-rc1

19:12 <anarsoul> xdarklight: exynos still would need opp :)

19:14 <Putti> the exynos display controller doesn't work (at least in 5.3 kernel) correctly with devfreq so I don't know if devfreq can only be enabled for lima

19:14 <xdarklight> anarsoul: OK. just wanted to let you know so you don't waste time debugging devfreq issues on 5.7 while you could spend your time better (like pushing out more lima improvements) :)

19:15 <anarsoul> xdarklight: thanks, I'm following kernel driver development as well :P

19:15 <Putti> xdarklight, yeah, thanks for letting me know, today is the first day I tried lima on this device :)

19:15 <Putti> and so much better than SW rendering

19:15 <Putti> so thanks a lot to you all lima developer!

19:18 <anarsoul> Putti: you're welcome, please keep us up to date on lima integration into lineageos

19:30 <Putti> anarsoul, so I lowered the clock rate all the way down to 40mhz but kernel says "lima 13000000.gpu: mod rate = 50000000" so I guess it doesn't want to go below 50Mhz. This still didn't fix the glitches so now I will have to figure out how else I can configure the voltage regulator

19:34 <anarsoul> 50mhz is probably too low

19:34 <anarsoul> but it shouldn't cause glitches

19:34 <anarsoul> so yeah, check voltage regulator

19:35 <Putti> I don't know what to check on the voltage regulator

19:40 <Putti> not sure I understand the PMU driver but I only see low power setting for the G3D power supply being used

19:40 <Putti> so that could be it, will have to figure out how to get the normal power option enabled