On Wed, Aug 24, 2022 at 2:37 AM Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> Hi Morimoto-san,
>
> On Wed, Aug 24, 2022 at 03:13:04AM +0000, Kuninori Morimoto wrote:
> >
> > Hi Renesas-ML
> > Cc Saravana, Greg, Laurent, Geert
> >
> > I'm now testing v6.0.0-rc2 kernel on ULCB-KF board, and I noticed
> > it doesn't probe sound card.
> > I git-bisected and noticed that this patch breaks sound probe.
> >
> > commit 71066545b48e4259f89481199a0bbc7c35457738
> > ("driver core: Set fw_devlink.strict=1 by default")
> >
> > I could re-probe sound card if I reverted it.
> > (My .config is using Y for all drivers)
> >
> > I'm not well understanding about this patch,
> > but it seems it is related to deferred probe.
> >
> > My sound card needs many drivers to probe.
> >
> > HDMI
> > Sound CPU
> > Sound Codec x 2 (depends on I2C)
> > Sound Card
> >
> > To probe "Sound Card", it needs other necessary drivers.
> > But it seems some necessary drivers are not probed by above patch.
> > In my quick check, "HDMI" and 1 of "Sound Codec" drivers are not probed.
> >
> > How can I solve this issue, or where I can check ?
>
> Saravana is more familiar with devlink than I am, so he may be able to
> diagnose that without further information, but otherwise it would be
> helpful if you could provide some logs. Enabling the debug messages in
> drivers/base/dd.c can provide some insight. The contents of the debugfs
> devices_deferred file can also be useful, as well as the
> consumer/supplier links in sysfs for all the devices involved with the
> sound card.
Thanks Laurent!
Kuninori, Those are exactly the things I'd need. And a pointer to the
dts (not DTSI) file that corresponds to the board.
Also, (I don't think it'll help but might give info for debugging),
try booting with deferred_probe_timeout=0 and
deferred_probe_timeout=1.
-Saravana
