Re: help testing a vchiq patch

On Thu, Aug 20, 2026 at 03:49:56PM -0700, Bakul Shah wrote:
> On pi4 /dev/sndstat doesn't show any extra devices.
> Any audio comes out on the mini jack (as before).
> 
> # cat /dev/sndstat
> Installed devices:
> pcm0: <VCHIQ audio> (play) default
> No devices installed from userspace.
> 
> Also, sound device permission bits are wrong.

This is due to a recent change in main:
https://cgit.freebsd.org/src/commit/?id=a6aa95eba6ee2dd199d6cb8063dbaccd8a6f7512

> 
> # ls -l /dev/dsp* /dev/mixer* /dev/sndstat
> crw-rw----  1 root audio 0x6e Aug 20 15:26 /dev/dsp0
> crw-rw----  1 root audio 0x6d Aug 20 14:59 /dev/mixer0
> crw-r-----  1 root audio  0x6 Aug 20 15:00 /dev/sndstat
> 
> Compare with x86-64 machines:

... which I presume are running an older build.

> # ls -l /dev/dsp* /dev/mixer* /dev/sndstat
> crw-rw-rw-  1 root wheel 0x4b Aug  4 19:43 /dev/dsp0
> crw-rw-rw-  1 root wheel 0x4d Aug  4 19:43 /dev/dsp1
> crw-rw-rw-  1 root wheel 0x4f Aug  4 19:43 /dev/dsp2
> crw-rw-rw-  1 root wheel 0x51 Aug  4 19:43 /dev/dsp3
> crw-rw-rw-  1 root wheel 0x53 Aug  4 19:43 /dev/dsp4
> crw-rw-rw-  1 root wheel 0x4a Aug  4 19:43 /dev/mixer0
> crw-rw-rw-  1 root wheel 0x4c Aug  4 19:43 /dev/mixer1
> crw-rw-rw-  1 root wheel 0x4e Aug  4 19:43 /dev/mixer2
> crw-rw-rw-  1 root wheel 0x50 Aug  4 19:43 /dev/mixer3
> crw-rw-rw-  1 root wheel 0x52 Aug  4 19:43 /dev/mixer4
> crw-r--r--  1 root wheel  0x7 Aug  4 19:43 /dev/sndstat
> 
> 
> > On Aug 17, 2026, at 7:59 AM, Mark Johnston <[email protected]> wrote:
> > 
> > Hi,
> > 
> > I wonder if anyone running FreeBSD on an RPi is able to help test the
> > patch here? https://reviews.freebsd.org/D58889
> > 
> > It fixes some bugs in the RPi videocore kernel-mode driver, and it
> > modifies the bcm2835 audio driver as well.  If anyone using these
> > drivers can report whether they see any regressions with that patch
> > applied, I'd appreciate it.
> > 
>