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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<nik123> Hello people, I just wanted to know is being able to run lima (on a Allwinner A20) with a LCD is possible. One guy did it, but replicating his steps lead to me nowhere. Link: https://forum.armbian.com/topic/14560-sun4i-drm-and-lcd-panels/
<nik123> This is an entirely new A20 tablet port and I've got most of the things to work, including:
<nik123> Touchscreen, Audio (both speakers and jack), Wi-Fi/Bluetooth, GPU (but in HDMI only)
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<nik123> I've managed to extract the appropriate LCD settings from the fex file and they work in U-Boot
<nik123> I'm just wondering if getting Lima to run also is possible
<nik123> *with the LCD
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<asdf28> are you sure this is a lima problem?
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<nik123> Here's the source: https://pastebin.com/1mGkJLcZ
<asdf28> i always thought that it doesn't know about the display that's being used
<nik123> Yeah it's not a lima problem
<nik123> that's why im asking here
<nik123> because sun4i-drm is the driver responsible for giving lima a workable drm
<nik123> IIRC
<nik123> the reason why it fails is because sun4i-drm doesn't give lima a workable surface, which instantly fails any compositor
<nik123> while when I plug in HDMI, it's all fine
<nik123> and a another weird side effect is when the de (display engine) is enabled, the framebuffer ceases to work
<nik123> is there a way of communicating how to run the LCD to the DE
<libv> nik123: which tablet is it?
<nik123> Some Croatian rebrand of a Chinese no-name: Vivax TPC-9150
<libv> which device page?
<nik123> No device page as of yet
<nik123> I've just ported the thing
<libv> nik123: a device page is a working document
<nik123> So should I add one?
<libv> yes, you could document as you go
<nik123> where do I add a new page
<nik123> cant seem to find the option anywhere
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<nik123> sorry my pasting skills clearly aren't developed enough
<nik123> anyways hopefully that's enough detail
<nik123> as for the hardware images I'd rather not take the device apart again
<nik123> it in bad shape as it is now
<nik123> *it's in bad shape as it is now
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<nik123> anyways
<nik123> any ideas on how to get sun4i-drm to comply with the LCD?
<asdf28> nik123 thanks for creating the wiki page!
<asdf28> hdmi output on an old tablet, that's unusual
<nik123> yeah
<nik123> micro or mini HDMI
<nik123> not sure
<nik123> but not your full-size one
<nik123> also that port helped me a lot until i figured out how to enable the LCD
<asdf28> i wish i could help you but i've never done this
<nik123> So I guess this is as far as it goes for enabling a device using only DTS?
<nik123> because not really in a mood to write kernel drivers
<nik123> but i understand it must be done to an extent
<gediz0x539> nik123: could you identify your LCD? so we can easily use some similar devices as a reference.
<nik123> So take apart the device and see the sticker if any
<gediz0x539> even basic dimension, resolution may help for now if you're not in the situatio of taking the device apart
<libv> asdf28: most a20 tablets had hdmi
<nik123> gediz0x539: I've already listed that
<nik123> And that information is in the U-Boot patch as well
<gediz0x539> oh sorry
<gediz0x539> let me look at that again
<nik123> just not the model
<nik123> i do not know who made this LCD
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<gediz0x539> i'd look at drivers/gpu/drm/panel/panel-simple.c and compare your CONFIG_VIDEO_LCD_MODE with existing devices to look for an identical/similar device
<libv> and drm panel simple or somesuch
<nik123> managed to get some photos of the back side without breaking the tablet
<nik123> yay
<nik123> apologies about the camera quality in advance
<nik123> FOSS camera drivers arent really the best in a smartphone
<nik123> sorry about imgur, i don't know of any alternative
<nik123> but yeah
<nik123> those are the images
<asdf28> libv right, almost all had it, it seems. i didn't know that
<gediz0x539> libv: i've backed up the irclogs for this channel, beginning from 2013. is it fine to upload it to the wiki?
<gediz0x539> as a some kind of dump
<gediz0x539> i use whitequark's logger frequently but nowadays it kind of looks a little bit problematic
<gediz0x539> is it labeled "GQ-LT9D-LED18-3.5", "D075-D1B2-140328-007162"
<gediz0x539> nik123: i could not find anything based on these terms
<nik123> I believe the D is either an 0 or O
<nik123> LT90
<nik123> D075-D1B2-140328-007162
<nik123> for the other
<nik123> I couldn't either
<nik123> :\
<gediz0x539> it's probably BOE
<gediz0x539> pretty much similar except the BOE part "BOE7D-GQ-LED18-3.5-104"
<libv> nik123: you can upload images straight to the wiki
<libv> s/images/pictures/
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<libv> gediz0x539: not sure what that would look like
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<gediz0x539> yeah i also do not know what would be the best way to share that. so i upload a compressed archive log somewhere and share its link in my user page, citing whitequark logger.
<nik123> doesnt look like it connector-wise gediz0x539
<nik123> it's a straight flat 50-pin from the exact center of the LCD
<nik123> that one bends
<nik123> most similar to mode l3
<nik123> *model 3
<nik123> shown on the website
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<gediz0x539> all given parameters may change depending on your setup, as you may already guess
<gediz0x539> be, tcon0 and tcon0_out nodes are also necessary btw
<nik123> and I can assume that no-one did this for a A20 device
<nik123> and that I have to change sun7i-a20.dtsi as well
<nik123> gediz0x539
<gediz0x539> yeah, I've looked for an lcd panel node in A20 DTSes and as libv said, almost all of them have HDMI
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<jernej> anarsoul: do you know what is the max. GPU frequency on A64?
<jernej> I tried with same opp table as on H3 a while back but it didn't work
<jernej> apparently 576 MHz doesn't work on all boards (one user reported artifacts and lock up)
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<anarsoul> jernej: IIRC 432Mhz
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<anarsoul> blob sets it to 432
<anarsoul> 576 didn't work for me either
<jernej> ok, thanks!
<jernej> did you try to use any opp table?
<anarsoul> nope
<anarsoul> I just set it to 432mhz unconditionally
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<nik123> gediz0x539 where would I obtain LCD pins?
<nik123> or should i just yolo it and try sun5i's pins
<nik123> nothing changed
<nik123> lul
<nik123> also have tablets ever used LVDS
<nik123> because that seems supported
<nik123> it's in the sun7i-a20.dtsi file
<nik123> GUISE IT WORKS
<nik123> AAAAAAAAAAAA
<nik123> it worked for a second
<nik123> :(
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<nik123> turns out drm did work, but when wayland launched the system froze for some reason
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<JuniorJPDJ> nik123: LVDS is used for screens with better resolution than 800x480
<JuniorJPDJ> so for most of tablets better than crap
<JuniorJPDJ> I enabled LCD on 2 tablets this week, you can make a look here: https://gitlab.com/postmarketOS/pmaports/-/merge_requests/2040
<JuniorJPDJ> and there's soft I wrote to calculate patch for panel-simple from uboot config string: https://gitlab.com/JuniorJPDJ/uboot-rgb-to-simple-panel
<JuniorJPDJ> tag me if you'll need further help with that ;D
<JuniorJPDJ> ktos mi znalazl problem z usb prawdopodobnie, axp209 pinctl bylo wylaczone w kconfigu
<JuniorJPDJ> kompiluje i testuje daelj
<JuniorJPDJ> * kompiluje i testuje dalej
<KotCzarny> you should stick to english, i guess
<KotCzarny> unless you missed the right window
<JuniorJPDJ> oh that's not this window, sorry xD
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<JuniorJPDJ> anyone knows what can cause problem with usb power?
<JuniorJPDJ> where to search
<JuniorJPDJ> my sun4i tablet has 1 otg mini usb port and 1 full usb A port
<JuniorJPDJ> and devices on USB-A works only when I connect power supply to miniUSB
<JuniorJPDJ> else there
<JuniorJPDJ> * else there's no power on output
<JuniorJPDJ> and I'm out of ideas
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