[Pkg-electronics-devel] Bug#1055171: fpga-icestorm: icebram incompatible with yosys 0.23

[Daniel Gröber]

Package: fpga-icestorm
Version: 0~20220915gita545498-3
X-Debbugs-Cc: Andras Pal <apal at szofi.net>

Hi Andras,

On Wed, Nov 01, 2023 at 04:52:25PM +0100, Andras Pal wrote:
> I'm using the yosys/nextpnr/icestorm toolchain regularly under Debian and
> after upgrading to bookworm i noted (after some debugging) that in some
> cases yosys-0.23 tends to generate memory instances whose initialization
> values cannot be replaced with the `icebram` utility in a similar way like
> in the previous (and in the following) releases.

Do you have a reproducer/example for this? I haven't had the need to use
icebram in my projects yet so having a regression test in the package would
be good.

> By checking the source code on github, i found that `icebram` underwent a
> significant refactoring, likely after freezing the bookworm release (i.e.
> sometimes in between Sept '22 and Feb '23). And indeed, after manually
> downloading installing the trixie version (20230218gitd20a5e9-1) of the
> fpga-icestorm and fpga-icestrom-chipdb packages, the toolchain started to
> work again as it is expected.
> 
> Is it possible to backport this upgraded version of `icebram` to bookworm as
> well in order to be compatible with the shipped yosys version? I don't know
> what is the severity of this bug - it is indeed not a security issue, but
> otherwise the packeges are broken in this sense. And it might be beneficial
> for another users and projects as well.

Sholdn't be a problem. There's two ways to go, either we find a (small)
patch that fixes the issue in the version from stable or (with some
negotiation with the release team) we get permission to upgrade the version
in stable.

--Daniel