17:56 <ungeskriptet[m]> Hi guys,

17:56 <ungeskriptet[m]> I have a TrekStor tablet (https://wiki.postmarketos.org/wiki/TrekStor_SurfTab_ventos_7.0_HD_(mid-g30ref)) with an Amlogic AML8726-MX SoC which I am intrested in getting mainline Linux to run on. I wrote a small dts (based on meson6-atv1200.dts) which *should* give me a console via UART, however I only getting garbled output which reacts to my keypresses - nothing useful tho. (Here's the dts:

17:56 <ungeskriptet[m]> https://gist.github.com/ungeskriptet/25fd7f3d9e414c0f77ed68d2b57b7ba5). The commands I use to boot the kernel in uboot are: `mmc rescan 0; fatload mmc 0 0x82000000 uImage; fatload mmc 0 0x82000000 uInitrd` and `bootm 0x82000000 0x83000000`. The dts is appended to the kernel, because otherwise I get no output at all.

18:09 <xdarklight> ungeskriptet[m]: I suggest booting with the earlycon kernel cmdline argument to see if at least that works until the full-blown UART driver takes over

18:09 <ungeskriptet[m]> s/I have a TrekStor tablet (https://wiki.postmarketos.org/wiki/TrekStor_SurfTab_ventos_7.0_HD_(mid-g30ref)) with an Amlogic AML8726-MX SoC which I am intrested in getting mainline Linux to run on. I wrote a small dts (based on meson6-atv1200.dts) which *should* give me a console via UART, however I only getting garbled output which reacts to my keypresses - nothing useful tho. (Here's the dts:

18:09 <ungeskriptet[m]> Amlogic AML8726-MX SoC which I am intrested in getting mainline Linux to run on. I wrote a small dts (based on meson6-atv1200.dts) which _should_ give me a console via UART, however I only getting garbled output which reacts to my keypresses - nothing useful tho. (Here's the dts: https://gist.github.com/ungeskriptet/25fd7f3d9e414c0f77ed68d2b57b7ba5). The commands I use to boot the kernel in uboot are: `mmc rescan 0; fatload mmc

18:09 <ungeskriptet[m]> 0 0x82000000 uImage; fatload mmc 0 0x82000000 uInitrd`, `setenv bootargs "console=ttyAML0,115200"` and `bootm 0x82000000 0x83000000`. The dts is appended to the kernel, because otherwise I get no output at all./

18:09 <ungeskriptet[m]> https://gist.github.com/ungeskriptet/25fd7f3d9e414c0f77ed68d2b57b7ba5). The commands I use to boot the kernel in uboot are: `mmc rescan 0; fatload mmc 0 0x82000000 uImage; fatload mmc 0 0x82000000 uInitrd` and `bootm 0x82000000 0x83000000`. The dts is appended to the kernel, because otherwise I get no output at all./I have a TrekStor tablet (https://wiki.postmarketos.org/wiki/TrekStor_SurfTab_ventos_7.0_HD_(mid-g30ref)) with an

18:10 <xdarklight> ungeskriptet[m]: also the .dtb you linked sets 2GiB of RAM while the wiki page only mentions 1GiB... that seems problematic

18:11 <xdarklight> ungeskriptet[m]: and finally: I think it's been years since someone last tried making Meson6 boot - so status is "unknown" at best

18:12 <ungeskriptet[m]> Yep earlycon did the trick 👍️

18:16 <ungeskriptet[m]> Hmm it seems that it gets garbled again after the driver loads? https://bpa.st/YVAA

18:16 <ungeskriptet[m]> About the dts: Should I use `reg = <0x40000000 0x04000000>;` instead

18:17 <xdarklight> ungeskriptet[m]: yep, reg = <0x40000000 0x40000000>; is what we use on other 1GiB boards

18:18 <xdarklight> ungeskriptet[m]: if it's getting garbled again then the most likely cause is that one of the clocks (which are currently hardcoded in meson6.dtsi because there's no clock driver) is wrong or the UART driver has some assumptions about the UART IP which is not true on Meson6