Date: Sat, 25 Aug 2018 09:26:01 -0600 From: Ian Lepore <ian@freebsd.org> To: Yuri Pankov <yuripv@yuripv.net>, freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: pci bus rescan from userland Message-ID: <1535210761.1488.45.camel@freebsd.org> In-Reply-To: <561d2b7b-b36a-7bee-bb23-fb7d0ff9a50b@yuripv.net> References: <561d2b7b-b36a-7bee-bb23-fb7d0ff9a50b@yuripv.net>
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On Sat, 2018-08-25 at 18:21 +0300, Yuri Pankov wrote: > Hi, > > Trying to enable the HDMI/DP sound output on NVIDIA Quadro M2200, I have > found the following workaround on NVIDIA Linux forums > (https://devtalk.nvidia.com/default/topic/1024022/linux/gtx-1060-no-audio-over-hdmi-only-hda-intel-detected-azalia/post/5211273/#5211273): > > setpci -s 01:00.0 0x488.l=0x2000000:0x2000000 > rmmod nvidia-drm nvidia-modeset nvidia > echo 1 > /sys/bus/pci/devices/0000:01:00.0/remove > echo 1 > /sys/bus/pci/devices/0000:00:01.0/rescan > modprobe nvidia-drm > > So far rmmod and modprobe steps are obvious, setpci works as well (I > guess I could use pciconf? doesn't really matter). Is there a FreeBSD > equivalent of doing the remove/rescan steps from userland? devctl(8) has a rescan function. devinfo(8) might be useful for figuring out which device(s) to use the rescan command on. I don't know much about either of these tools beyond the fact that they exist. -- Ian
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