Hey,
On Fri, 2023-01-06 at 16:36 +0100, Andreas Henriksson wrote: > On Tue, Jan 03, 2023 at 11:56:51PM +0100, Andreas Henriksson wrote: > > On Tue, Jan 03, 2023 at 11:46:31PM +0100, Andreas Henriksson wrote: > > > On Wed, Dec 28, 2022 at 04:11:04PM -0800, Vagrant Cascadian > > > wrote: > > > > rpi_4 > > > > rpi_4_32b > [...] > > Hello again, > > While I only have the earliest rpi 4B rev A0 (1.1) it has come to > my attention that apparently there's a revision C0 (1.4) that > has problems booting with u-boot. > > Apparently in 1.4 revision they changed the hardware in > an incompatible way and then cover this up by having the > proprietary firmware modify the dtb in ram to change nodes > as needed. Yes that revision has a newer version of the SoC same/similar as in the rpi 400 > The issue has been discussed on the rpi forums: > https://forums.raspberrypi.com/viewtopic.php?t=315662 > > There has been seemingly two indenpendent attempts at submitting > (very similar) patches upstream to adress this in u-boot: > https://lists.denx.de/pipermail/u-boot/2021-November/468322.html > https://lists.denx.de/pipermail/u-boot/2021-September/462020.html > ... but apparently they've never been merged. Fwiw this came up on the u-boot list again today: https://lists.denx.de/pipermail/u-boot/2023-January/504038.html Lets see if things move forward this year.. Fwiw the latest upstream attempt i saw was Antoine's patch series: https://lists.denx.de/pipermail/u-boot/2022-August/491455.html Which resent my patch + added some additional tweaks. > > NixOS are carrying patches: > https://github.com/NixOS/nixpkgs/tree/master/pkgs/misc/uboot > which includes some revision of Sjoerds patch. > > Some info on board revisions can be found at: > https://www.raspberrypi-spy.co.uk/2012/09/checking-your-raspberry-pi-board-version/ > > This issue probably deserves it's own separate bug report, > but since I don't have the hardware in question I'm leaving that > to who ever else cares and just share the info I have. > > It might be useful to consider just include NixOS/Sjoerds patch > or documenting that RPi 4B hw rev 1.4 will not work. > (Hardware revision is visible in /proc/cpuinfo under the Revision: > field.) > However it maybe best trying to find someone who has the affected > hardware revision that can confirm the problem exists and that > the patch actually resolves it. I can confirm both the problem and the patch solving it :) -- Sjoerd Simons <sjo...@debian.org>
