07:06 <szemzoa> hi, this is my first Allwinner SoC, a T113-S3. I try to write a simple bootloader to boot linux. Current state is I'm able to use xfel tool to init DDR RAM, than I upload my bootloader with xfel to 0x30000 address (with correct boot_head), which is load the kernel and DTB to SDRAM from SDHCI0 from a FAT partition, and jump to the kernel, but it is not booting, this is the log: https://pastebin.com/QwZiAvay

07:07 <szemzoa> anybody has an idea what I do not so well?

07:34 <DuClare> psci..

07:34 <DuClare> I think that wants a secure monitor thing

07:34 <DuClare> What was it called again..

07:36 <DuClare> ATF

07:37 <DuClare> That is something you'd normally load with u-boot

07:37 <DuClare> I'm not sure what the convention on allwinner platforms is

08:16 <szemzoa> I'll look at it in u-boot, thanks

12:02 <apritzel> szemzoa: for ARMv7 it's U-Boot providing PSCI services

12:02 <apritzel> if you don't care about the second core for now, just remove the PSCI references from the device tree

12:03 <szemzoa> yes, I was able to boot correctly with only one core, disabling the PSCI.

12:06 <apritzel> but that's some BSP kernel and DT, right?

12:07 <szemzoa> yes, this one is the official allwinner kernel/dt. I try to get rid of all the fancy bootloader, fex, u-boot etc, keep it as simple as possible.

12:08 <szemzoa> and maybe one day use mainline kernel...

15:57 <apritzel> szemzoa: do you have the "User manual" for the T113-S3?

20:48 <LordKalma> Hello! Nice to join you all! Found your website while doing some research :D

20:52 <LordKalma> Let me tell you my story. I do amateur (ham) radio. And I bought this: https://www.radioddity.com/products/xiegu-x6100

20:52 <LordKalma> Happens that the community found it it uses an Allwinner SoC

20:52 <LordKalma> https://raw.githubusercontent.com/TemporarilyOffline/X6100-TOADs/main/HiRes%20Photos/20211212_183003.jpg

20:52 <LordKalma> ^pic of the SoC

20:53 <LordKalma> It runs Linux on top of that. And the GUI is a Qt app. The community is already quite advanced in "hacking" it. Like booting armbian from the SDCard slot and etc

20:53 <LordKalma> We do have a problem tho... In an unsurprising violation of the GPL 2.0, there is one driver missing: the LCD display

20:54 <LordKalma> and no, the company doesn't seem they'll share their kernel...

20:54 <LordKalma> It's something i'll try to look into in the future :) Perhaps making the kernel driver, or try to :)

20:55 <LordKalma> I don0t have a question in particular about the SoC right now, just wanted to share my story :) and hang around and learn

20:56 <jernej> LordKalma: depending on connection type, LCD driver might be very simple

20:57 <LordKalma> I can give you what we already know, if you want to comment on it :)

20:58 <jernej> well, I'm not really interested in device, I just wanted to say that making LCD work with mainline kernel should not be that hard

21:01 <LordKalma> the mainline kernel has this: https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/panel/panel-sitronix-st7701.c

21:01 <LordKalma> And the display the radio uses is the Jinglitai model JLT4013A, with ST7701S driver IC

21:01 <LordKalma> notice the S in the end

21:01 <LordKalma> and it uses SPI, not MIPI

21:02 <LordKalma> (in this device, I mean)

21:05 <jernej> ah, SPI LCD, that's a bit weird

21:06 <jernej> well, probably cheaper

21:06 <LordKalma> https://i.gyazo.com/0de5746275e9bbf7e6e42c55c371b031.png

21:07 <LordKalma> someone more advanced in this than I am shared this code (unfortunately as a screenshot) from the decompiled DTB

21:07 <jernej> do you have access to dtb?

21:07 <jernej> this looks like mainline kernel

21:08 <LordKalma> someone decompiled it

21:08 <jernej> yes, but if you have device, you can also dump it

21:08 <LordKalma> the community already dumped the kernel, already built new kernels (except for that driver), etc etc

21:08 <LordKalma> yes yes, and the manufacturer gives firmware updates as .img files

21:09 <jernej> which kernel is running originaly?

21:09 <LordKalma> the version? not sure what you're asking

21:09 <jernej> yes, version

21:10 <jernej> devices based on Allwinner SoCs rarely feature mainline kernel

21:11 <LordKalma> > Linux version 5.8.9 (jet@ubuntu) (arm-buildroot-linux-gnueabihf-gcc.br_real (Buildroot 2020.02.9) 8.4.0, GNU ld (GNU Binutils) 2.32) #89 SMP PREEMPT Sun Feb 20 13:55:09 HKT 2022

21:11 <LordKalma> Jet seems to be the Xiegu employee that does the building