Re: RPi4B 2711ZPKFSB06C0T parts seen in the wild, 13.0-RELEASE fails to boot on them
Mark Millard via freebsd-arm <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On 2021-Apr-18, at 06:32, Denis Ovsienko <denis at ovsienko.info> wrote: > > >> The C0T RPi4B should be able to DMA outside >> the 3 GiByte limit that the B0T ones had: no more >> limit. The RPi firmware may configure the C0T parts >> differently and FreeBSD might have changes >> required if it is to work with the newer parts. > > As far as these commends make sense to me, the foundation has started > shipping RPI4B revision 1.5, The 2711ZPKFSB06C0T RPi4B was reported to indicate revision code b03114 for itself (via attachment content), which that README.md lists as v1.4: b03114 4B 1.4 2GB Sony UK (The ending hexadecimal digit indicates what goes after "1." for "new-style revision codes".) But it turns out that the above line was added to the table in the same commit as the line: c03130 Pi 400 1.0 4GB Sony UK which is a known 2711ZPKFSB06C0T context. The commit was back in 2020-Nov. For all I know there may be b03114's that show a B0T suffix. The shared commit may be a red herring. This makes it still unclear if there will be distinct revision codes in general. > but forgot to bump the revision number up > and to update It is a possibility but not a certainty. > https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md > > If that's the case, it might be better to solve the problem at the > source rather than at run time. It may be more effective to raise this > through the shop, as the foundation does not seem to have a bug tracker. An interesting point about b03114 being a 2GB model's revision code is that the DMA limitation is basically irrelevant since there is < 3 GiByte of RAM to start with. Fixing the DMA limitation would not have been the point of having a 2711ZPKFSB06C0T part in this type of context. === Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar) _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"