Another victim...
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Igor (BotchedRPR)
@botchedrpr@mastodon.social
mastodon 4.8.0-nightly.2026-10-06Hi, thanks for viewing my profile :)
I break phones, and maybe mainline them as a side effect
Currently working on blackberry key2 series android, mediatek mainline, and other cool stuff :)
Wishing you a great day from Poland
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Joined August 21, 2025
Finally - after some 6 hours of work, and multiple new drivers, fixes to the tree - #uboot with internal storage (ufs), and USB gadget is up on the CMF Phone 1 (MediaTek MT6878).
This was my first attempt at writing some uboot drivers - a learning experience. But I'm glad it all worked out, and now #postmarketOS will have an open bootchain on a modern MediaTek platform! Looking to upstream these patches after I clean everything up.
And if that wasn't enough - yep, that's first stage U-Boot on the CMF Phone 1.
This device has a vulnerability in its secure boot system allowing unsigned bl2 and lk images. I've settled on replacing lk, as bl2_ext initializes clocks, PDs and importantly display (which U-Boot is currently incapable of on this platform). So, the CMF logo is drawn by bl2, after that it's all U-Boot.
Such a simple boot sequence too:
Preloader -> bl2_ext -> u-boot
Replying to
@gischpelino@mastodon.online @gray@bark.lgbt @jolla@techhub.social
Pick the lesser evil.
SailfishOS is a (mostly) open source OS thats gradually opening up. Firmware is closed.
Android with GMS is a closed source OS (if we are talking about device distributions). Firmware is closed too.
Besides that, due to regulations and other stuff, no SoC will ever be fully "open". Even ath10k has proprietary blobs.
The Key2 family up to date. January 2026 security patch, Android 15.
Well, almost. There's still some polishing up to do but overall the port is in good shape. The regular Key2 has more issues than LE currently (and that is so sad - much nicer device). Apart from some modem firmware issues (Damn you BlackBerry for not releasing Pie!!!) the rest of the issues are very simple and should be fixed really soon. Feels good.
Replying to
@elly@donotsta.re @gray@bark.lgbt @gischpelino@mastodon.online @jolla@techhub.social
Exactly. I'm a very happy person running an (almost) entirely open and ported by me boot chain on my MTK. I would've never had that privilege on Qualcomm chips. I hate people screaming "Mediatek is proprietary bullshit!" because of the chinese phone markets of 2012-2015 where nobody shared kernel source. Blame it on the vendor? Hell no, what a great phone they sold me... hmm... who to blame it on... my other phones have Qualcomm. It has to be MediaTek then!!!
I've sent off the first one of many #uboot enablement patches for the MT6878/CMF Phone 1
Starting off with: UFS :)
https://lore.kernel.org/u-boot/20251011-mtk-ufs-uboot-v1-0-a05f991ee150@mentallysanemainliners.org/