rellla changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi - *only registered users can talk*
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<lvrp16> KotCzarny: if you can call a coffee shop an office :)
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<lvrp16> i'm pretty sure libre computer was conceived on a coffee high
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<Jackie365> Where can I get more information about F1c600?
<Jackie365> the wiki does not provide much
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<karlp> probably because it's an archaic legacy part, that predates ~all sunxi, and this dude just found a roll or three of them and is flogging them off?
<karlp> you're talking about this lichee thing I presume?
<Jackie365> Ha! yes!
<Jackie365> I have some difficulty understanding the user manual of f1c600
<Jackie365> Currently I am trying to finger out the boot system
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<karlp> they seem like curious toys honestly.
<Jackie365> yes, I agree
<Jackie365> I'd like to develop a product using f1c600
<Jackie365> so I bought the lichee board
<karlp> have you got supply chain stbaility verified for that part?
<karlp> or is this a product of ~20?
<Jackie365> sorry, what is "~20"
<karlp> was curious at the number of units you want to do for your product.
<karlp> ~ == circa/about
<Jackie365> I don't know if Allwinner will supply that kind chip in the future
<Jackie365> And it's not going to be "a product of ~20"
<Jackie365> You're saying that I should consider choosing another chip?
<Jackie365> And I'm really curious about how you get to know the lichee board.
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<Jackie365> Is the F serials going to be end of line?
<karlp> as I understood it, they were EoL'd years ago.
<Jackie365> Oh my God
<KotCzarny> werent they quite recently new models?
<karlp> but maybe speak to your allwinner sales rep
<KotCzarny> ie. few new eink ereaders
<Jackie365> And the Allwinner website has F serials
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<Jackie365> So,were they really EOL?
* karlp shrugs it's still on their website, no idea what their plans are,
<Jackie365> agree
<Jackie365> so I'd better change my plan
<karlp> well, speak to them.
<Jackie365> ok, I'll contact the Allwinner soon
<Jackie365> thank you, karlp
<willmore> I thought the A13 was the 'someone just found a spool of it and was trying to sell them off.' looks like they found other spools. ;)
<karlp> were you goint to integrate the part directly or try and integrate the lichee part?
<Jackie365> use the soc directly
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<Jackie365> I think it's powerful enough for my product
<Jackie365> peripheral may cost a lot if I use other chips
<Jackie365> Products based on F serials can be extremely cheap,right?
<KotCzarny> as any other allwinner soc based product
<Jackie365> low power consumption
<Jackie365> F serials has both,right?
<karlp> both what?
<Jackie365> it's cheap and consume less power
<Jackie365> am i getting it right?
<Jackie365> I am new to allwinner chips, so after searching the web for some time,I came to that conclusion
<Jackie365> So any other choice?
<karlp> f1c600 product brief is from 2015-2016, so *shrugs*
<karlp> how could anyone possibly know what other choices there are, you've not metnioned anything about your requirements :)
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<Jackie365> oh,performance is not needed. cost and power are the only factors
<Jackie365> peripheral does not need to be very rich
<Jackie365> SD card and USB and RGB output would be enough
<Jackie365> all others are irrelevant
<Jackie365> I think the V serials is too much
<Jackie365> so is other serials
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<Jackie365> I am leaving . Thank you guys, thank you for your help.
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<paulk-leonov> mripard, wens: hey there! I've been working on bringing up the bananapi 3.5" LCD (used by the FOSDEM video boxes) with mainline and found that the LCD DE line must be configured as a GPIO held low (the panel most likely takes an inverted state, which our TCON apparently can't do so DE has to be asserted low all the time instead)
<paulk-leonov> now I have a fix for U-Boot which makes it work with simplefb up to Linux (at http://git.code.paulk.fr/gitweb/?p=u-boot.git;a=shortlog;h=refs/heads/bananapi-lcd-3.5 ) but I'm wondering how to integrate that with the DRM driver
<paulk-leonov> do you have a clue?
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<lvrp16> allwinner will manufacture old chips if you want 50k or more
<lvrp16> so no chip us really eol, just masks are shelved
<karlp> kinda why we suggested to talk to allwinner not us :)
<mripard> paulk-leonov: I'm not really sure that it's a safe thing to do on all displays
<paulk-leonov> mripard, indeed, I think it's only relevant as a workaround for this particular display
<mripard> paulk-leonov: the display engine repeats the last pixel when not in the active window
<mripard> so it can lead to really weird panel behaviours and side effects
<paulk-leonov> either way, if the DE pin is not always asserted low, I get a black screen
<paulk-leonov> would it make sense to have a property for the de node in device-tree to indicate that this quirk is required?
<paulk-leonov> display-engine node*
<paulk-leonov> this seems more related to the display engine not being able to invert the DE pin polarity than a panel-side issue, IMO
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<f11f12> paulk-leonov: which SoC is that?
<paulk-leonov> f11f12, A20
<f11f12> paulk-leonov: I have a custom board with A20 + LCD that works (without patch). I can test your patch on my LCD to see what it does.
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<paulk-leonov> f11f12, well what I'm talking about only concerns the very specific panel I'm dealing with, it does not affect other panels in any way
<paulk-leonov> so that won't really be necessary :)
<f11f12> paulk-leonov: ok. If you keep DE low, youuse h/v sync?
<paulk-leonov> I suppose so
<paulk-leonov> I'm still unsure whether it's an inverted DE or just that the pin that was routed to something else that needs to be kept low
<mripard> paulk-leonov: that should be a panel I guess?
<mripard> +property
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<rellla> wens, mripard: i don't want to nag you :) but i have pushed my log when executing v4l2-request-test on A10, which includes cma and drm debug infos know. my issue seems to be drm related, so maybe you can find any suspicious things. the same kernel runs fine on A20.
<rellla> s/know/now
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<mripard> rellla: that seems correct
<mripard> what's the issue?
<rellla> the one i mentioned in #cedrus
<rellla> i have green garbage on the screen
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<rellla> kernel is 4.19-rc4 with your cedrus/4.18/drm (rebased) and the latest h265 tree. dts nodes for sun4i drm frontend and cedrus are added. v4l2-request-test reports everything decoded and displayed correctly.
<mripard> have you tested the display without v4l2-request-test?
<rellla> mripard: a few days ago i did it with vlc which seems to do correct iirc
<rellla> there has to be a small bit which is still different from sun4i-a10 to sun7i-a20, because on the cubieboard2 it is working fine.
<mripard> I guess a good first test would be to test whether the display works fine or not using modetest
<mripard> including with multiple planes
<rellla> mripard: can you give me hint for "with multiple planes"?
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<mripard> rellla: you have multiple planes on the display engine, each of them being able to display a different framebuffer, and the engine will do the hardware composition
<mripard> the framebuffer console takes one
<mripard> and thene v4l2-request-test takes a second one, and put it on top of fbdev's
<mripard> so you want to test that those two planes are working properly
<rellla> with modeset i have 4 planes for the crtc-id, doing "modetest -M sun4i-drm -P 28:1280x720+0+0@NV12 for example works for all plane ids.
<f11f12> mripard: is the mali output renderd to a different plane than the default /dev/fb0 output? (on R40/V40)
<mripard> rellla: and if you try two -P options, one being like half the first one ?
<mripard> so something like -P 28:1280x720@XR24 -P 29:640x360@NV12
<mripard> (adjust for actual IDs)
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<mripard> f11f12: it will draw to fb0 if you're using the fbdev blob
<f11f12> mripard: on V40 I can run qt5 demos but the screen remains blank, fbv works fine (fb0==HDMI out). I use r6p2/fbdev
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<f11f12> mripard: proc/interrupts shows that interrupts are generated when I run a qt5/opengl demo (e.g. hellowindow)
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<mripard> f11f12: I never tested the R40, or heard of anyone that tested the mali on that SoC
<mripard> so I don't really know, sorry
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<rellla> shows 2 planes, with the smaller on top.
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<mripard> looks alright then
<rellla> let me check the same with A20 to see a difference ...
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<rellla> mripard: drm debug log while executing v4l2-request-test seems to be the same on a10 and a20. modetest also runs fine on both. i have no idea where to search for the issue anymore. can i dump the output of v4l2-request-test into a file somewhat?
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<rellla> *dump the decoded frame of course
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<rellla> paulk-leonov, mripard: found it!!
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<rellla> the issue is with scaling. if i drop calculation of scaled_height and scaled_width and just take the original values of width and height and feed coomit_atomic_mode with them, everything is shown nice
<paulk-leonov> hmm
<paulk-leonov> I see
<paulk-leonov> rellla, I guess I'll try to setup an A10 tablet soonish and see what I can do
<rellla> not sure if it's scaled_* or x/y ... must check
<paulk-leonov> rellla, right, so this means that scaling is somewhat broken on the driver side
<rellla> i wonder why this works on a20 and not on a10...
<rellla> let me see what commit_atomic_mode does ...
<paulk-leonov> well, the DE hardware got some changes across generations, so some quirks are required
<paulk-leonov> rellla, did you enable frontend quirks for the A10 in the DRM driver?
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<rellla> yes
<paulk-leonov> maybe disable them then ;)
<rellla> at least we know, that has to sth with scaling.
<rellla> i can know confirm, that cedrus works on A10 including drm :p
<paulk-leonov> great :)
<rellla> with the need of probably some fixes :)
<rellla> they do not sound suspicious ...
<paulk-leonov> IIRC these are directly related to scaling
<paulk-leonov> we had a similar issue on the A20, which mripard fixed by introducing these
<rellla> ok, i will try some things as i couldn't find a difference in allwinner 3.4 code ...
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