[Letux-kernel] LX20 prototype is booting

[H. Nikolaus Schaller]

> Am 06.05.2025 um 16:47 schrieb Paul Boddie <paul at boddie.org.uk>:
> 
> On 2025-05-06 06:58, H. Nikolaus Schaller wrote:
>>> Now, I did read something recently, maybe related to GCC or perhaps Debian, about older XBurst implementations not supporting the appropriate MIPS floating-point semantics. This may have complicated the situation for MIPS32 in Debian, leading to its relegation to only getting support from a third party in future releases.
>> Well, that should indeed influence future development.
>> But here I am using good old Jessie which is working fine on all other Ingenic
>> MIPS devices.
> 
> But newer kernels may well have stricter requirements than the kernels that worked previously, and these new requirements may prevent the old binaries from working. Such considerations may have contributed to the dropping of support for MIPS32 in Debian, as I noted. Remember the fuss about the flash technology used in the CI20 where suddenly people were being told that they should never have expected the flash storage to work, and support for it was going to be removed? It could be that kind of situation.

Well, I am not sure about this since 6.1.28 and 6.15 show exactly the same effect and only for x2000/xburst2.
And I would not expect that dropping Debian MIPS support in Trixie (not yet published) has anything to do with our Jessie not working.

What I could to is to install Bookworm and give it a try...

> 
> I would have to go through my mail to recall the details, and I am not currently in a position to do that. It should perhaps be noted that Sudomaker might not even be using Debian, particularly since their devices are also memory-constrained and probably use a customised root filesystem image. So they can build their programs exactly as they need for the appropriate kernel version.

Yes, they may solve it that way but we have no chance in our framework.
In the worst case we have to develop some emulator (like we started for Stretch on jz4730 where Jessie is the last Debian that can simply boot) - or find the right fix.

BR and thanks,
Nikolaus