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<wens>
rafaelMOD: oh hey, you're back
<rafaelMOD>
wens! hi
<wens>
rafaelMOD: the a23 does have uart0, but it is only muxed with mmc0 :(
<rafaelMOD>
i am totally lost on A23 documentation
<rafaelMOD>
A23 datasheet and usermanual just don match!
<rafaelMOD>
And A23 SDK is just not reliable!
<rafaelMOD>
And I am right now developing the hardwar schematic for that open hardware board i mentioned before
<rafaelMOD>
but i am a bit scared with such an inconsistency of docs
<rafaelMOD>
yep, i got that muxing with the sdcard
<wens>
rafaelMOD: i can only guarantee you uart0 on mmc0 and r_uart
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<rafaelMOD>
but its possible to use other sd card interface to boot
<wens>
as i have a tablet, and those are the only ones exposed
<rafaelMOD>
after a lot of research i am secure with uart2 and uart3 to
<wens>
ok, that's good :)
<rafaelMOD>
i am matching A23 datasheet, A23 user manual, A33 datasheet, A23 eval board schematic and A23 sdk to select pins
<rafaelMOD>
!!!!
<rafaelMOD>
a hell of a cherry peak
<rafaelMOD>
And i never know who to trust!
<wens>
oh, could you share the eval board schematic?
<rafaelMOD>
Man, my CEO signed a NDA for that and he just DONT want to share it, no matter how i ask him
<rafaelMOD>
but i found one online
<rafaelMOD>
on wendu, and i need help downloading it because is all in chinese!
<wens>
link?
<rafaelMOD>
i am at home now, i dont have it here! just at office, buy some one gave it to me here in the channel
<rafaelMOD>
buy = but
<wens>
rafaelMOD: no rush :)
<rafaelMOD>
promisse you first thing tomorrow morning (here is 00:15am)
<wens>
10:15 am here
<rafaelMOD>
:)
<rafaelMOD>
we just signed another NDA with merrii to disclousure the A33 tablet shematic and some A33 documents
<wens>
anyway, i would trust the eval board, provided you can get the "real" fex file out
<rafaelMOD>
and i really dont know how to manage that, my CEO is not willing to share
<rafaelMOD>
ah, i forgot to mention, i am using lipo8 fex to match the info to
<rafaelMOD>
its a documentation hell
<rafaelMOD>
and as far as i know, the uarts are there
<rafaelMOD>
but the datasheet or manual doesnt have them
<wens>
and since the new sdk uses the pinctrl subsystem, you should be able to get the kernel to dump stuff out
<rafaelMOD>
its so wierd that the user manual mention even the port PA!! there are no pins for that!
<rafaelMOD>
thats the greatest documentation hell i ever seen! allwinner doesnt release docs, and when they does, its a total mass! none match!
<wens>
it's possible the pin controller does have them, just the pins aren't routed outside of the chip
<rafaelMOD>
but the datasheet doesnt mention the UART0 pins! and the fex and the eval board does!
<rafaelMOD>
its a total mess, we cant be sure of anything, and for hardware design this is a hell
<wens>
i agree
<rafaelMOD>
i asked for a meeting on the office to clarify that, and i got a GO for designing the coreboard
<wens>
rafaelMOD: does your CEO share the eval board design with you? if not then there's a problem...
<wens>
otherwise, under the NDA, you really aren't allowed to share it beyond your company
<rafaelMOD>
with me he shared!
<rafaelMOD>
my solution for that was publishing the schematic based on the eval
<rafaelMOD>
i have a wip, do you want it? its on kicas
<rafaelMOD>
kicad
<rafaelMOD>
but if you give me one more week it would be finished
<rafaelMOD>
afaik there are two eval board documents, both A23/A33
<rafaelMOD>
one of them is online, but in a chinese site that i just cant downlaod it becouse you have to get a phone message confirmation on china!
<rafaelMOD>
and i was matching pins, as they say A23 and A33 are pin to pin, but if the docs are right, and they are NOT, both are not pin to pin! One have a GND in other VCC!!
<rafaelMOD>
its a mess,
<wens>
rafaelMOD: i don't have kicad, sorry
<rafaelMOD>
its open source
<rafaelMOD>
i can do a pdf if you want
<rafaelMOD>
of schematic
<wens>
i'm not really into hardware design either. I can read the schematics, but that's about it.
<wens>
sure, pdf would be nice
<rafaelMOD>
but as i said, is wip, just give me one more week and it will be finishedf
<wens>
though i'm not sure if i can be of any help
<rafaelMOD>
wens, no probelm, is just for sharing
<wens>
phone message confirmation..... can't help you there, i'm not in china
<rafaelMOD>
the phone is for registering the site,
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<rafaelMOD>
wenku or baidu, i dont recall now
<wens>
wenku is a online docs service under baidu :)
<rafaelMOD>
do you have a login on it?
<rafaelMOD>
we need one to download the pdf!
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<wens>
no i don't
<wens>
sorry
<rafaelMOD>
i just cant find it on google
<rafaelMOD>
but i have bookmarked on my officepc
<rafaelMOD>
sorry for that, i'll sent it tonorrow
<rafaelMOD>
but i am totaly not confident on this new hardware design
<rafaelMOD>
the doc is crap
<rafaelMOD>
i think the SDK is the more reliable documentation. Do you know how to get the pin number from the drivers? I was trying to find on the fex parsing but got stucl
<rafaelMOD>
stuck
<rafaelMOD>
Found the A33 tablet doc on channel irc log
<topi`>
hno: good to know. I already noticed that the 3.17 kernel contains some basic bits for A31 to get DRAM, interrupts, etc working
<topi`>
what about U-Boot?
<topi`>
wens: thanks. What are those "kfb_ok" files?
<wens>
all those were downloaded from merrii
<wens>
just different releases
<topi`>
ok.
<topi`>
does "stripped" equal "binaries stripped of debug symbols"? that's a big difference in size...
<topi`>
336M vs. 1926M
<topi`>
too bad the A31 uses SGX, I think the Mali 400 would have been a more opensource friendly choice...
<topi`>
is it possible to use the framebuffer (draw with CPU) on the A31?
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<wens>
stripped = toolchain and android stuff dropped
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<topi`>
thanks!
<topi`>
I'll get that one. Any recommendations on the toolchain? Is the most recent linaro GCC all right?
<topi`>
I've been building that for several targets with crosstool-ng
<wens>
i'm using emdebian toolchain
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<topi`>
I've hooked the USBserial cable to the merrii board's connector and powered up the board, but nothing appears on minicom (115200n8) ... I suppose it ships with an android image on NAND flash, but does it print anything to UART0?
<topi`>
I'll try swapping the Tx/Rx
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<topi`>
there! works
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<topi`>
my merrii a31 board shuts down (although no messages appear on UART?) after 30 seconds or so, any idea what might be the problem? The power supply is 2.5A
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<mripard>
is it booting android?
<topi`>
it tries to, but I've only seen the android launcher scree nonce
<topi`>
once
<topi`>
it usually dies before the screen appears.
<topi`>
I wonder if this is a HW issue...
<mripard>
do you have any messages on the UART before that?
<topi`>
is there a dedicated reset button? I've been using the button labeled POWRE (hold it down 8 secs and it boots)
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<shineworld>
topi`, if you have android bootloader image you can also get a ADB connection to try a ADB shell dmesg or adb logcat
<mripard>
i think there is
<mripard>
on the side of the board
<mripard>
shineworld: if Android doesn't boot, adb won't be usable
<topi`>
shineworld: I'm just trying to see what messages I get on UART when android boots
<mripard>
topi`: yep, flip the board, the reset button is there
<topi`>
actually, it gives me access to shell prompt
<topi`>
there are two blue LEDs, on the sides of the board (close to the mounting holes), what are the meaning of those LEDs?
<topi`>
I see they light up when I connect +5V
<shineworld>
mripard, usually when you are in bootanimation adb start is just after
<topi`>
actually, they are semi-lit even when disconnected, because (probably) the USB-UART supplies some power
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<topi`>
7.9 seconds after kernel boot, the LEDs stop shining. totally. I wonder if this is a HW failure...
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<mripard>
shineworld: yeah, but it's still an userspace app.
<mripard>
nothing related to the bootloader, and not really useful if you have a kernel crash
<topi`>
[ 1.399]battery low power with dc or ac, should charge longer
<topi`>
hmm, might this be related?
<topi`>
I wonder where the battery low is detected...
<shineworld>
ok :)
<shineworld>
I'm used with cubieboard where I use UART to early boot things too
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<topi`>
what SoC does the cubieboard use?
<shineworld>
Allwinner A20
<shineworld>
or A10 (for old boards)
<topi`>
ok. I guess A20 is really well supported on linux
<shineworld>
I'm 90% and android kernel/OS programmer
<shineworld>
But I will move to linux surely
<topi`>
these devboards with 2 GB ram are made for running linux :)
<topi`>
I'm thinking of server usage here
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<shineworld>
android is a toy ... I know... but the GUI is friendly and simple to use than linux and my customer ask simplicity
<shineworld>
and overall I've very few knowledge on how to do touchable applications with linux...
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<topi`>
my board seems to shut itself down after 30 seconds or so :/ I wonder why
<topi`>
is there a watchdog or something?
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<topi`>
I changed to a 3.0 A power supply and it still shuts down after 30 secs or 20 or whatever. odd...
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<topi`>
I'm beginning to think that the A31 requires a heatsink... the resets might be thermally related
<topi`>
since it's trying to bring up android, it has probably started the SGX, which consumes plenty of amps
<mripard>
I didn't experience any heat related issues with an A31 without an heatsink
<topi`>
mripard: is this on the Merrii A31 hummingbird?
<topi`>
maybe I just have a bad sample here
<mripard>
both the hummingbird and another A31 board yep
<topi`>
I'll let the chip cool a bit and try again to see how far it goes
<topi`>
mripard: did you get the UART output when the device boots?
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<topi`>
my A31 gets pretty hot...
<topi`>
does your board boot automatically after connecting +5V or do you need to press the POWER button for 8 secs?
<topi`>
my board goes to some mode after connecting +5V and won't start the kernel until POWR button pressed
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<topi`>
it says "enter standby" and then "power limit detect exit" is the last msg i get, until I press the POWER
<topi`>
then I get: "exit standby by 2", "current bat_cal = 0"
<topi`>
and it says "long key" and then "WORK_MODE_BOOT and Hit any key to stop autoboot" (this msg comes from UBOOT I believe)
<topi`>
WTF? the spec sheet for Hummingbird (on merrii.com) says that Input Power: +12V / 2A
<topi`>
mripard: are you using 5V or 12V power?
<topi`>
the spec sheet says "12V DC in" so maybe I should believe that...
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* mnemoc
loves 12V
<mnemoc>
specially in 2.1/5.5mm barrels
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<hramrach_>
specifically when it is the same barrel plug used fr 5V on another device
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<mnemoc>
:D
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<mnemoc>
the cubies and the meles use an smaller barrer (like the PSP) for 5V
<hramrach_>
shineworld: doing touch applications in Linux is simple. disable right click on your mouse and test your application. apply theme with big buttons. done.
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<hramrach_>
I think my cabling supplier has all the branching elements and cables with barrel on one end for 2.1/5.5mm and you then use an adaptor to connect to actual device
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<wens>
a31 hummingbird comes with 12v supply
<hramrach_>
and I have a very thin barrel socket on the a23 tablet which looks suspiciously alike to the socket on a chromebook. 5v and 12v
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<hramrach_>
12v supply is generally more sensinle. what 5v supply spares you is 1 dc-dc convertor for USB
<topi`>
wens: interesting. My A31 hummingbird came with no power supply at all (it doesn't even fit in the package)
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<hramrach_>
but 5v supply works with all those USB chargers out there
<topi`>
next, boot procedure. Is it possible to divert booting to a SD card? say, I'll want to have my own UBOOT
<hramrach_>
on a31 it's more difficult
<topi`>
there is a button called "UBOOT", what does it do?
<topi`>
probably is hooked to some GPIO, which UBOOT then reads during boot procedure
<hramrach_>
that is customarily a button that enters FEL (usb boot) mode
<hramrach_>
but you cannot tell until you try
<hramrach_>
topi`: iirc there was somewhere a boot seqence description on the wiki which pointed out that the a31 is *different* from the other SoCs and you have to switch the boot device by connecting some pins somewhere
<hramrach_>
which may or may not be available as testpoints or jumpers on the board
<hramrach_>
but I cannot find the boot description for a31
<topi`>
I guess strict-aliasing needs to be taken away from -Werror
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<Meskibear>
Hello, I need a working boot.cmd for uboot 2014/10 and banana pi - the wiki code https://linux-sunxi.org/Manual_build_howto#boot.cmd does not work (stuck after loading the kernel), tftp might work, but I have a 2nd primary partition ready as rootfs on my sdhc card.
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<topi`>
whew, managed to compile u-boot, let's see if it really boots...
<Meskibear>
topi: are you using boot.cmd or uenv.txt with 2014/10 uboot?
<libv>
Meskibear: 2014/10 is upstream uboot.
<libv>
Meskibear: you are not following the manual build howto
<libv>
so you can stop pretending as if that page is valid for you
<Meskibear>
I used this git branch: git://git.denx.de/u-boot-sunxi.git - what's so wrong about that one for banana pi? That board is in - has it's own config
<libv>
Meskibear: what u-boot version does the manual build howto talk about?
<topi`>
the A31 wiki page says "Linux-sunxi's u-boot currently lacks SPL support. This means that you have to chain load it from Allwinner's bootloader" (but the How link is not written yet)
<topi`>
what does this chain loading mean? do you compile another SPL, which is then loaded by the existing SPL?
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<hno>
topi`, if I am not mistaken the A31 uboot button changes bootorder to always be SD, FEL.
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<hno>
topi`, the u-boot chainloading means you need to use Allwinner bootloader to load u-boot. There is no u-boot SPL for A31.
<libv>
so has anyone noticed any improvement from allwinner apart from releasing some incomplete docs themselves and creating a neutered kernel tree?
<adj_>
libv, what SOC do you recommend for openness?
<mnemoc>
discard all those with GPU and VPU :p
<adj_>
only SOCs that aren't a system on a chip?
<adj_>
good idea!
<adj_>
:)
<mnemoc>
:p
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<hno>
adj_, a SoC do not need video to be a SoC.
<hramrach_>
like Marvell SoCs for NAS
<adj_>
hno, just jocking
<libv>
adj_: allwinner a20
<mnemoc>
good answer
<adj_>
better than imx6?
<adj_>
lima is a good project, not a complete driver yet
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<libv>
adj_: i wouldn't know.
<adj_>
;)
<Turl>
libv: it's been a while since somebody asked
<Turl>
:p
<libv>
:)
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<adj_>
i miss the old days with x86 and matrox g400
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<mnemoc>
adj_: if you like x86, there is prpplague's minnowboard
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<mripard>
the Tegra K1 has an open GPU driver too.
<adj_>
don't like x86, just i didn't imagine that 15 years later that OS graphic support were so poor
<adj_>
just to thank libv and the other making so good work!
<libv>
well, the industry is stupid and shortsighted and unable to adapt in less than a century
<mnemoc>
same applies to laptop screen.... :(
<libv>
and with this i mean chipmakers, their customers and their suppliers.
<Turl>
mnemoc: but 1080p ought to be enough for everyone :P
<mnemoc>
most still 1360x768
<Turl>
mnemoc: that's more than 1080p if you rotate your screen 90º :)
<hramrach_>
just watched some 480p video on 1440p screen. you do need decent scaler for that
<libv>
mnemoc: buy more expensive laptops :)
<Turl>
libv: iirc he's a fan of the business grade lenovos :p
<mnemoc>
libv: I would, if they wen't also replacements for the bathroom's mirror
<hramrach_>
hehe
<libv>
i like 14" probooks
<hramrach_>
but if you are a spy you can see who's behind you
<mnemoc>
hramrach_: indeed
<libv>
but they only go to 1600x900 still
<libv>
still no full hd on them
<hramrach_>
not as much good if you are actually a coder
<libv>
some lenovos do, but they have other drawbacks from where i sit
<hramrach_>
recent notebooks have lame keyboards
<libv>
hramrach_: s/recent/any made this decade/
<hramrach_>
I mean if they must make the arrow keys half-height they can as well leave them out
<Turl>
hramrach_: no arrows?!?!
<mnemoc>
and they become worse every year
<Turl>
heresy!
<libv>
apple crap :(
<libv>
just like this whole ultrabook bs
<libv>
those people who still buy laptops want a mobile workstation, not a fashion statement
<hramrach_>
ultrabooks actually work
<Turl>
libv: some people don't want a small desktop with UPS
<libv>
not when you spend all day building yocto
<hramrach_>
they made the mainstream platform so low power that you can have a mobile office in a 13" lightweight thin case
<hramrach_>
but mobile workstations are getting rare. very few 17" laptops
* Turl
has a 16" one here
<mnemoc>
17" doesn't qualify as mobile :p
<Turl>
the 14" gets waaaay more use though :)
<libv>
Turl: why!
<hno>
it does.
<hramrach_>
the fact that they can stuff a 1080p screen and a numeric keyboard into 15.6" case is not an excuse
<libv>
Turl: only those massive backpacks take them
<mnemoc>
:D
<hramrach_>
for workstaion 17" is mobile
<Turl>
libv: because it was a desktop replacement more or less :p
<libv>
even then!
<Turl>
libv: I have a suitcase for it
<libv>
haha
<mnemoc>
17" is a desktop with built-in UPS
* hno
uses a backpack.
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<hno>
17" is a mobile desktop.
<Turl>
libv: for the 14" I use a backpack
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<libv>
Turl: ah, so you have a useful machine as well ;p
<hramrach_>
I can understand people who want 17" screen on a laptop
<Turl>
with a denim cover for the notebook
<hno>
at least with a decent screen, which I had..
<Turl>
libv: yeah
<Turl>
libv: 14" is Pentium, 16" is C2D
<adj_>
we have 6" 2500x1440 smartphones with unsupported gpu and 1360x768 15.6" laptops with well supported gpus
<Turl>
both with intel gfx :)
<hramrach_>
if you just take it out of car/put into car and want to have as good mobile display as possible it's the way to go
<libv>
adj_: my 14" probook is almost 3 years old
<Turl>
they're ~6y old, both of them
<libv>
i have worn off the aluminium layer on the palmrest
<mnemoc>
adj_: my 2500x1440 smartphone is 5.5" ... and has more pixels than my laptop and external display combined...
<libv>
i looked into what the latest probook is like
<libv>
and it barely has changed or improved
<Turl>
mnemoc: what did you replace your gnex with? :p
<mnemoc>
Turl: LG G3
<adj_>
mnemoc, and a powervr gpu?
<libv>
no improved screen, the 2 intel gen jump barely improves performance
<libv>
the whole pc world has been at a semi standstill these past 3 years
<hramrach_>
btw the problem with mirroring is solved by a screen foil
<Turl>
HD6k is pretty good I hear
<Turl>
libv: ^
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<mnemoc>
adj_: yes... but hey! it's a phone
<libv>
Turl: you mean the intel gpu?
* Turl
libv yeah
<Turl>
err without the /me
<hramrach_>
so if you *really* want a notebook with the specs of Apple hardware for the price of Apple hardware and the only problem is the gloss you can get that fixed for very little extra
<hno>
I had 1920x1200 17" matte, fully supported Intel GPU. Until screen crashed from physical abuse by a book.
<mnemoc>
Turl: always so selfish... /me /me /me
<Turl>
libv: I'm pretty happy with my HD4k tbh
<Turl>
mnemoc: :p
<libv>
Turl: yeah, i am pretty happy with the sandy bridge i am running on as well, i think my next one will be an i7 (if hp offers it to me), and i can live with 1600x900, but i pine for full hd
<hramrach_>
actually, the latest Intel CPU seems to be a noticable improvement
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<Turl>
libv: and GM45 is more than enough for day to day use
<libv>
the thing is simply worn out :)
<Turl>
libv: and that's 6y old tech :p
<libv>
what do we need graphics for anyway?
<libv>
showing our terminals and our editors
<Turl>
libv: gnome shell :D
<hramrach_>
but the 2 gen before were very minor
<Turl>
libv: and games :p
<Turl>
now that we got steam
<hramrach_>
graphics for hi-def terminals
<hramrach_>
improve readability of Chinese manuals
<Turl>
hramrach_: heh
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<rafaelMOD>
does anyone knows what kind of DDR3 is used on Ippo 8? Is it 78ball FBGA or 96ball FBGA?
<Turl>
libv: on the other hand, I battled a geforce 7025 on noveau the other day
<Turl>
libv: no way in hell it'd show the correct resolution for the monitor :<
<hramrach_>
if you have picture of the board
<hramrach_>
read the writing on the chip
<hramrach_>
search datasheet
<hramrach_>
read number of balls
<hramrach_>
also 78vs96 ball might give different chip format
<Turl>
libv: I had to force a modeline on xorg.conf and even then it outputted some other resolution according to the monitor OSD
<hramrach_>
just look at the chip size directly or on X-ray
<libv>
Turl: i don't get that
<Turl>
libv: at least it looked half sane and not all stretched and blurry having done that :(
<libv>
Turl: why is display still not working as it should!
<libv>
it vould be sensible and logical and all that
<hramrach_>
if you want just number of balls photos from a luggage inspection machine might be good enough
<Turl>
libv: looking at the logs it printed some edid stuff as all zeros
<libv>
if only clueful people were tasked to work on it
<Turl>
libv: all blue connectors as far as I could see :)
<rafaelMOD>
hramrach_: i dont have one in hands, i'll look for pictures
<rafaelMOD>
thanks
<Turl>
libv: another pc with the same gpu and same monitor worked fine, ironically enough
<hramrach_>
the other day I was debugging an issue with a 18" screen connected to hdmi on a10s showing all stretched and blurry text
<Turl>
hramrach_: with HDMI it's usually the monitor at fault
<Turl>
some overscan crap or autoadjust setting
<hramrach_>
turned out that the screen somehow *thought* that I only want like 320x280 out of 1280x1024 displayed and changing the settings fixed it
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<hramrach_>
the screen is DVI. it should not care about overscan crap :/
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<Turl>
hramrach_: my monitors have multiple inputs, and it turns out it does some sick color correction and noise reduction on HDMI
<Turl>
unless you go and edit the source name to "PC"
<Turl>
of course it's not documented anywhere
<hramrach_>
it corrects the color so that everyone appears sick on the screen?
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<Turl>
hramrach_: lol
<Turl>
hramrach_: it doesn't correct anything
<Turl>
maybe if you're watching a movie from a 720p STB it'd
<Turl>
but when you're running a pc desktop it's no good
<rafaelMOD>
exactly the same doc i have here for A23 eval board
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<rafaelMOD>
libv: i was checking the olinuxino A13 to see how they convert from LCD RGB to VGA connector, and on sunxi wiki it mentions a DAC that converts the signal with DACs, but i saw on the schematic they use 3 SN74ALVC244, which is a non inverting buffer
<rafaelMOD>
libv: with dac you ment digital to analog converter?
<hno>
rafaelMOD, you need to look closer... a couple mm to the right.
<rafaelMOD>
libv: sorry i didnt get it, o saw the diferent resistor in each output, it works like a resistor divider??
<hno>
yes.
<rafaelMOD>
wow, nice, now i got it
<hno>
the buffer is for isolation and having a known drive strength.
<rafaelMOD>
and for making that work, the SoC just need to have the TCON peripheral? I want to use this on A33
<hno>
The SoC just needs to support TTL LCD connection.
<hno>
and suitable timing control.
<rafaelMOD>
hno: and what would be the kernel driver for that kind of display? the same tft driver?
<hno>
LCD driver with somewhat adjusted timings.
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<rafaelMOD>
Anyone tested that on Olinuxino A13?
<libv>
rafaelMOD: yeah, to convert to vga signalling
<rafaelMOD>
thanks guys, i will use that on the A33 board
<rafaelMOD>
comparing datasheets, both have similar controllers, specially TCON, so it should work with some hacking
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<rafaelMOD>
and i will go for 1GB RAM (2x 512Mx8 78ball FBGA) and 8GB Flash
<hno>
iirc the LCD_DE signal was key to get this to work at all. First iterations did not have that controlling the buffers and got very odd results due to LCD controller continuing outputting display data during sync periods.
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<rafaelMOD>
on olinuxino schematic i see lcd_de in paralel with a general gpio, but the gpio is marked as NA.
<rafaelMOD>
is LCD_DE enough?
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