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*
<catphish> Net147: interesting
<catphish> i assumed they were all 4096
<catphish> i've moved away from the a20, and luckily only need 1080 :)
<Net147> catphish: I am able to do 3840x2160@24Hz on A20 using only backend with another 4K monitor, but HDMI seems to underrun depending on GPU/RAM load causing some flickering lines
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<catphish> yeah, i think we discussed before that the dma on the a20 backend can be limiting
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<Net147> catphish: I can get most of the image to display using frontend if I limit the width, but I get even more frequent flickering using frontend
<catphish> :(
<Net147> and the A20 frontend driver is missing a mux so I had to poke a register to get it to output to the correct backend
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<hanetzer> nice. one of my coworkers bought a sunxi android tablet with that adups spyware on it
* hanetzer didn't want to buy another piece of hardware but.... fun stuff :P
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<plaes> Net147: were you able to find it?
<Net147> plaes: find what?
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<hanetzer> anyone know who this 'Oliver' on the linux-sunxi.org wiki is?
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<hanetzer> http://linux-sunxi.org/A-Star_KV49L got a device very similar to this one. can't figure out how to start fel mode :P
<plaes> he is not here atm.
<plaes> Net147: the mux for A20 frontend
<plaes> hanetzer: for fel mode I have used the sd-card
<Net147> plaes: OUT_PORT_SEL (bits 9:8) field of DEFE_FRM_CTRL_REG register (offset: 0x4). 00 is BE0, 01 is BE1.
<plaes> nice
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<wens> the de1 frontend driver is mostly developed on single display pipeline SoCs, so that bit would be missing
<hanetzer> plaes: so, I should use that fel sdcard image and just boot, or what?
<Net147> at least this one is in the A20 manual, unlike the HDMI source mux
<Net147> I don't really have any use for the frontend at the moment. the mixer would be useful for screen rotation though.
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<pmp-p> hanetzer: i think i have same one, if you get an uboot to work ping me so i can add it to fel-installer thank you
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<hanetzer> pmp-p: is it 'iview 1066' ?
<plaes> hanetzer: well, yes
<plaes> there's a binary in the repository ^^
<hanetzer> yeah, so I've seen. didn't realize it would be that 'easy' so to speak
<Net147> I guess no one is working on the de1 mixer processor?
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<hanetzer> plaes: thanks, that did the trick.
<hanetzer> hmm. constant -7
<hanetzer> there doesn't appear to be any nand on this device; just an emmc :)
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<hanetzer> suggestions as to a good rootfs for use on an a33 board ?
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<montjoie> hanetzer: there are no good suggestions without some needs/goal
<hanetzer> montjoie: very true. I've went ahead and gone gentoo route
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<plaes> hanetzer: I usually take debian using debootstrap
<hanetzer> yeah. honestly, the lack of an easyish to find uart is making me reconsider acquisition
<plaes> IIRC with A33 the uart is on same pins as cd-card
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<wens> A33 has additional uart0 pins on PB0/1
<wens> A23 is the one that is limited
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<plaes> wens: btw, I pushed sunxi-tools' SPI flash support for A20
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<montjoie> hanetzer: it is the better route:D!
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<quark_> wens: it seems those mfd changes related to sunxi battery/ac input missed 5.0 merge window
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<wens> damn
<quark_> hopefully linus will accept that late pull request :)
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<hanetzer> montjoie: hmm?
<hanetzer> montjoie: as in, not persuing it? its mostly because I'm a bit embroiled with rockchip stuff atm (u-boot for the rk3288 veyron-speedy chromebook and acquiring a rk3399 samsung chromebook plus for u-boot, and mali work on both), I don't have time for yet another SoC in my life :P
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<catphish> how are the rockchips to work with? much documentation?
<catphish> hanetzer: ^
<fALSO> you guys know if the GPIO on the Orange Pi PC works ?
<fALSO> is it easy to do a easy C program to "play" with it ?
<fALSO> blink some leds etc ?
<catphish> i don't have one, but it's highly likely that it works
<hanetzer> catphish: ideal. outside of the mali gpu they are wholly fossable (individual hardware may vary)
<fALSO> nice kotczarny
<KotCzarny> first check wiki, then irc
<fALSO> AWESOME
<fALSO> going to rebuild my kernl
<fALSO> with those options
<catphish> hanetzer: where would i find information on them (docs in particular)?
<catphish> hanetzer: i'm getting on ok with sunxi because it's the first thing i found, but would be interested to look at other options too
<catphish> fALSO: you can play with it without even writing anything i believe :)
<fALSO> going to try to do something on one of those nokia displays
<hanetzer> catphish: kernel/u-boot tree, #linux-rockchip prolly has more infos :)
<hanetzer> datasheets are available oneline
<catphish> hanetzer: that's cool, might buy one at some point and have a look for the datasheet then
<catphish> thanks
<ElBarto> catphish: everything is documented except the graphic stuff
<catphish> ElBarto: well that's cool, i hadn't expected it to be so good
<ElBarto> that wasn't the case before :)
<catphish> that really looks great
<catphish> is there an obvious choice of chip to use?
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<catphish> i guess any of the 3 properly supported ones
<ElBarto> I've only messed with RK3328 and RK3399
<ElBarto> but all three are more or less the same (-ish)
<catphish> well, great to see proper public documentation
<catphish> hopefully this will become more common
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<megi> KotCzarny: that's an old way to do gpio
<hanetzer> 3288 is pretty good to
<megi> fALSO: try googling libgpiod
<megi> and see /dev/gpiochip* :)
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<fALSO> thanks
<fALSO> awesome
<megi> I also had some fun accessing GPIO via /dev/kmem directly
<megi> this way I was able to read at 15MHz or so
<fALSO> LOL
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<fALSO> i just want to write
<KotCzarny> megi: what about write?
<fALSO> SPI or I2C
<fALSO> im not sure
<fALSO> gotta check the connection type of the display
<megi> you can write too, but I didn't need speed
<megi> I was just analysing traffic on CSI bus, using gpio access
<fALSO> :)
<KotCzarny> megi: audiocard on gpio?
<KotCzarny> ;)
<fALSO> CSI, like the series
<fALSO> megi puts on the GLASSES
<fALSO> horatio
<megi> interestingly even if io pins were configured for CSI I/O I could read actual vallues via gpio registers
<megi> haha, camera sensor interface
<fALSO> ahhh LOL
<fALSO> one of those tiny cameras
<megi> yup
<fALSO> are they any good ?
<fALSO> i think that the quality will be pretty crappy
<megi> any? yes, good? meh
<fALSO> lol
<fALSO> :-)
<fALSO> saw some on ali express for like 10€
<megi> you have to have a plenty of light
<karlp> there's other rockchips parts that are basically completely unsupported, I'd say RK parts are good/bad more patchy and uneven, whereas sunxi is pretty good across the board
<megi> yes, I bought some on aliexpress for 10 eur:)
<catphish> i didn't know /dev/kmem was a thing, can't think why userland would ever need to access kernel mapped memory space
<megi> probably the same one, as there are not many for opi
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<fALSO> ahh I tought it was a *standard*
<fALSO> and the raspberry pi csi cameras would also work on the orange pi
<megi> I'm working on a mainline driver for one of those now, gc2145/2035
<fALSO> nice megi
<KotCzarny> well, in the past devmem2 was the thing to hack around baremetal
<fALSO> you guys are such MASTERS
<KotCzarny> i guess kmem is just different take on it
<fALSO> i wish i had such low level hardware knowledge
<fALSO> and that C knowledge too, to patch the kernel
<catphish> KotCzarny: why wouldn't you just use /dev/mem when you're working with known physical memory locations
<KotCzarny> catphish: dont know, people used devmem2 for some reason, probably easier to pulloff from userspace
<megi> catphish: kernel may not like it, if it uses caching
<fALSO> there should be a titurial on how to be an hacker like you guys
<fALSO> ;-D
<megi> like it does with regmap
<catphish> megi: that makes sense
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<megi> fALSO: re camera standard: usually the wiring is different, or the camera module needs some extra power regulation and that's what those little adapter boards that are sold with orange pi cameras
<megi> you can alway use USB cam if you want something re-usable plug'n'play :)
<quark_> catphish: there is errors or missing parts in rockchip documentation too
<catphish> quark_: joy :)
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<quark_> better than allwinner but far away from TI documentation style
<catphish> i'm pretty happy with my h3 for now anyway
<megi> I grew up on Microchip PIC docs, and Allwinner was quite a shock tbh
<catphish> yeah, i came from STM32, which holds your hand through everything
<fALSO> i tried a USB camera
<fALSO> but it is VERY SLOW on the orange pi
<fALSO> very low FPS
<mru> I wouldn't call those pdfs from allwinner docs
<mru> since they don't really document anything
<megi> header files in PDF form? :D
<mru> if you're lucky
<mru> they are also wrong in many places
<catphish> they're incomplete, occasionally wrong, and totally without explanation, but... they are enough to get by :)
<mru> not really
<fALSO> my maximum hardware skill was to develop a *driver* for a SNES controller in a arduino leonardo
<mru> you still need to extract bits and pieces from the hacked up kernel sources they provide
<mru> still with no explanation of course
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<catphish> mru: i've not yet run into anything that wasn't somewhat documented, or available as documentation from a third party, but otoh i gave up on the idea of configuring dram myself
<mru> well, go look at TI or NXP docs
<mru> if the manual for a modern SoC isn't at least 3000 pages, it's missing something essential
<catphish> the lack of any words of explanation is problematic on its own :) have had to have help from a few people here, and inspiration (though not actual code) from u-boot
<mru> exactly
<mru> the so-called docs are insufficient on their own
<catphish> that's definitely true
<catphish> unless you just want GPIO :)
<catphish> even then, i suppose you'd have no idea how to get code running in the first place
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<silviop> Does someone iS working on ===================== WARNING ====================== This board does not use CONFIG_DM_MMC. Please update.......
<silviop> A13 q8 ???????
<silviop> I receive this message compiling u-boot for A13 q8 Tablet.
<karlp> unless you're going to work on uboots device manager code, just ignore it.
<karlp> and cross your fingers and hope that someone else is/will some time before uboot gets angry
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<mru> if you really hate seeing the message, fix it or pay someone to do it
<mru> I'm available for hire
<catphish> how much does an mru cost?
* hanetzer will work for hardware
<silviop> I partecipate to bootlin crowfunding , start your campaign!! im HERE , there is a lot of u-boot need to add on allwinner (DUAL LVDS support and MPIDSI support for example)
<plaes> \o/
<mru> catphish: for a job like that, I guess $1000 ought to do it
<catphish> i don't have that much :'(
<KotCzarny> does it include ifdeffing warning or something more? :>
<catphish> guess you'll have to remain uneployed
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<mru> or self-unemployed as someone put it
<megi> KotCzarny: hahah
<mru> KotCzarny: I'll ifdef it _and_ delete the line
<KotCzarny> any stretch goals?
<diego71> more work, more pay :)
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<megi> I've made lvds display work in u-boot and added a touch based boot menu for a tablet, see the vid at the end https://xnux.eu/tablet-hacking/ (in part supported by TBS)
<megi> was quite fun :)
<megi> also added some punk battery indication
<plaes> o_O
<plaes> you're a wizard :D
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<catphish> megi: that's pretty awesome
<plaes> kinda like the way you took touchscreen driver and just made it work in u-boot
<tnovotny> megi: btw, did you send the lvds patches (at least the first series) to u-boot already?
<catphish> another tablet with the worst screen ever
<megi> In the end I'd like to have a full custom easily hackable userspace that could do some crude UI for common tasks, like calling, sending sms, doing stuff with the internet, etc. Buildable into a single static binary. Configurable just like you configure the kernel, make menuconfig. But that's a very long goal. :)
<megi> tnovotny: nope, I'll probably wait for the clk/reset patches to land
<plaes> sun4i already supports LVDS
<tnovotny> megi: ok, thanks
<tnovotny> plaes: this is A83t based tablet
<plaes> yeah
<megi> plaes: yup, I just modified it to add support for a83t
<jaganteki> plaes, can you test this A10 MMC bug
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<plaes> yup, when I get home
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<megi> catphish: the screen is lowres, but my camera doesn't do it justice really
<plaes> jaganteki: A20 still works with this patch ;)
<plaes> but my only A10 device is at home
<jaganteki> What is the issue with A20, becuase it doesn't have DM_MMC
<jaganteki> it would work as it is
<plaes> yeah, there isn't any
<karlp> megi: what did you use for that website, it's very nice
<megi> my own php script
<karlp> right, didn't see any common indicators in teh soruce :)
<megi> used as a static site generator
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<silviop> I'm trying to compile 5.0-rc1 i have old 4.14 working .config , but i want to start with new .config i did not find sun5i_defconfig in kernel tree something is changed ?
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<KotCzarny> for a long time (always?) mainline used sunxi_defconfig
<KotCzarny> one config for all boards, with device specific bits defined in DT
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<silviop> from what kernel ? I will change wiki to reflect this thing
<KotCzarny> i would bet on 4.x at least
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<fALSO> megi, already installed libgpiod
<fALSO> later when i get home im going to try a little c program :)
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<fALSO> first to blink some leds, then im going to try to drive a simple LCD
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<megi> nice :)
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<megi> just be careful that it's a 3.3V interface on the sbc side
<fALSO> yap
<fALSO> thats OK
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<fALSO> megi, @home, going to look at the GPIO layout!
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<fALSO> do you guys know a way to see which PIN is PIN1
<fALSO> on the expansion port ?
<fALSO> how should i hold the board
<KotCzarny> see wiki page of your device
<KotCzarny> and pin1 is usually marked
<fALSO> let me try to look more carefully
<KotCzarny> see the white triangle
<fALSO> yes
<fALSO> with 3.3v
<fALSO> so that should be 1, the next to it 2
<fALSO> and so on
<KotCzarny> yup
<fALSO> thanks
<KotCzarny> and multimeter is your friend
<fALSO> going to blink a led now :-D
<KotCzarny> also, keep in mind if you draw more than 40mA from gpio, you will burn it
<fALSO> ohhhhh
<fALSO> i think a little led will burn it ?
<fALSO> you
<KotCzarny> depends on led
<fALSO> one of those basic ones with legs
<fALSO> one leg bigger than the other
<fALSO> normally used with arduinos and stuff
<fALSO> going to search a bit more, before doing anything :-)
<\x> when is the next generation of SBC's
<\x> what can we expect for 2019
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<megi> fALSO: did it work?
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<fALSO> megi, still looking at it ;-)
<fALSO> one thing...
<fALSO> gpioinfo doesnt know the name of any pin
<fALSO> lol
<fALSO> i dont know how to associate a phisical pin to one of those listed there
<karlp> fALSO: it's like port a, 0..32, port b 0..32 goes 0..64 sort of thing
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<megi> fALSO: you can check debugfs, it has the map of names to pin numbers
<fALSO> ok nice, going to try to dig into that
<fALSO> managed to crash the pi with gpioset lol
<fALSO> ;-)
<megi> it's in /sys/kernel/debug/pinctrl i guess
<megi> hmm :)
<megi> crashing is fine, crashing and burning on the other hand...
<catphish> HCF :)
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