<mkazantsev>
smaeul: hello! I was using your patches and device trees for D1 display engine and DSI, and I've ran into some trouble: https://pastebin.com/36xYX1Yc
<mkazantsev>
pipeline won't bind
<mkazantsev>
isn't there a circular dependency between sun6i_dsi_probe and sun8i_tcon_top_bind?
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<ungeskriptet>
Is it possible for a sun5i tablet to have disabled UART? I tried soldering wires to the serial port twice now and I'm getting no output at all. I have also tried the points next to the SD card slot with no luck either
<ungeskriptet>
I've also checked my soldering with a multimeter to make sure the continuity is all good which it is
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<apritzel>
ungeskriptet: we have seen missing FETs on some recent boards that would block serial input and/or output
<ungeskriptet>
I've just now realized that I had the metal frame from the LCD shorting the points I think.
<ungeskriptet>
But that shouldn't damage it permanently right?
<mkazantsev>
it could, I've burned a uart on A20 this way
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<apritzel>
ungeskriptet: are you sure you got the right UART? IIRC, on older boards it's not necessarily only UART0 that is used for debug
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<ungeskriptet>
I found two UART points on it, one on the back and one next to the SD card slot but neither of them worked
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<apritzel>
ungeskriptet: I meant the right UART device, in software. Or are you running the vendor code on the flash?
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<ungeskriptet>
Right now there is vendor stuff on it
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<ungeskriptet>
Even trying serial_noise doesn't work on it. I'm getting I/O error. Could that mean that my UART controller is unreachable or is the kernel restricting access to it?
<apritzel>
and what is your console? ADB over serial?
<apritzel>
meh, FEX ...
<ungeskriptet>
apritzel: I haven't yet done anything with it, stock ROM/firmware is still on there
<apritzel>
what's the SoC again? A33?
<ungeskriptet>
The pins I'm soldered to right now should be PG3 and PG4
<ungeskriptet>
sun5i/A13
<ungeskriptet>
I want to try getting UART output first before trying to flash/port U-Boot to it
<apritzel>
A13 ... sorry to hear that ;-)
<ungeskriptet>
lol
<apritzel>
so PG3/PG4 is UART1, I doubt you will see any output from a stock Android on that port
<ungeskriptet>
Yeah but should U-Boot output something to there if i set it in the script.bin file?
<karlp>
can you put in the sunxi-fel sdcard and have it show up as fel? is a13 supported?
<karlp>
because then you can just fel load uboot into ram and try things out.
<apritzel>
UART0 seems to be only on portF, so if the image is outputting debug info only on UART0, so you would need to use the PortF pinmux
<karlp>
and that's less hassle (IMO) than figuring out whether you can get a vendor sdk to do uart in a useful format.
<apritzel>
yeah, vendor SDK is typically a huge time sink
<apritzel>
you spend a lot of time working around weirdness, for no reason
<apritzel>
I guess q8_a13_tablet_defconfig would be a good starting point in mainline U-Boot
<apritzel>
karlp: what SoC is your problem on?
<apritzel>
ungeskriptet: that one uses CONFIG_CONS_INDEX=2, so it's outputting on UART1
<karlp>
h3.
<jernej>
apritzel: I'm debugging instability of DRAM driver on OPi3 LTS and I'm wonder, are we sure that AXP805 provides proper voltage for it? for LPDDR3 this should be 1.2 V.
<karlp>
there's a chance it hasn't been "unmounted" properly after writing the image, and damn, I do _not_ have the stamina to try and debug it much right now.
<karlp>
I'm doing enough image rebuilding and flashing to test out upgraddes, running into some of this is not helping much :)
<ungeskriptet>
apritzel: I'll try porting mainline u-boot tomorrow, I've bricked the nanda partition now anyway. Hopefully uart will work there
<apritzel>
jernej: according to the schematic, DRAM is on DCDC-E, which defaults to 1.2V, at least according to the AXP805 datasheet regulator overview
<jernej>
apritzel: ah,
<jernej>
I'm looking at default register value, which seems a bit high
<apritzel>
yeah, I was puzzled, too. 0x16 would mean 3.3V
<apritzel>
which doesn't make much sense
<apritzel>
but table 4 says 1.2V, and I guess you wouldn't see much of the DRAM at 3.3V ;-)
<jernej>
yeah, I guess it's good
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