Re: help testing a vchiq patch

Bakul Shah <[email protected]>
Newsgroups gmane.os.freebsd.devel.arm
Message-ID <[email protected]>
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.

# 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:
# 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.
>
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