[U-Boot] [PATCH 1/2] nitrogen6x: Pass the correct CPU revision to the kernel

[Eric Nelson <eric.nelson@boundarydevices.com>]

Hi Fabio,

On 03/16/2013 01:27 PM, Eric Nelson wrote:
> Hi Fabio,
>
> <snip>
 >
> That said, I don't think any of this can or should be done
> without identifying the down-stream code that might break.
>
> I've seen code that scrapes /proc/cpuinfo for the "Revision:"
> line and uses that.
>
> My memory is hazy, but I think it was in either or both the
> gstreamer plugins or an "FSL Power Monitor" applet in Android.
>
> I don't recall seeing it in any VPU-related code. Dirk, do you
> have a reference there?
>
> I'll try to do some tests of different userspaces with
> get_board_rev() returning zero and see what breaks.
>

The Gstreamer VPU plugin breaks on Solo and Quad if get_board_rev()
doesn't return 0x61xxx or 0x63xxx. Oddly, the code in vpu_lib.c
loads firmware based on the 61 or 63 reference and yet still
nominally works on a Solo with a hard-coded value of 0x63000.

The VPU seems fine. It runs Vivante demos on Solo and Quad
with a board rev of zero.

Regards,


Eric