Date: Thu, 21 Jun 2012 08:12:41 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Ruslan Bukin <br@bsdpad.com> Subject: Re: newbus / snd_hdspe(4) trouble Message-ID: <201206210812.41137.jhb@freebsd.org> In-Reply-To: <20120620204441.GA63638@jail.io> References: <20120620204441.GA63638@jail.io>
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On Wednesday, June 20, 2012 4:44:41 pm Ruslan Bukin wrote: > Hi. > > I have the problem with different behavior of snd_hdspe(4) sound card > driver initialization. > > If I load the driver by hand using kldload everything works fine, > but in case of loading driver at boot time (loader.conf) or compile > in kernel the driver can't initialize propertly. > > The snd_hdspe(4) driver is designed to create a pcm child device per > each pair of sound channels. > > The problem is that snd_hdspe loaded normally, but pcm child devices > are not appears. hdspe_pcm_probe() in driver is not called at all. > However snd_hdspe_pcm driver exists in kldstat -v after boot: > 5 1 0xffffffff81377000 a2c8 snd_hdspe.ko (/boot/kernel/snd_hdspe.ko) > Contains modules: > Id Name > 7 hdspe/snd_hdspe_pcm > 6 pci/snd_hdspe > > and I have checked, device_add_child() returns not NULL. > > I played with MODULE_DEPEND as done in snd_hda(4) but no luck. > What can I do to debug the problem? The snd_hdspe driver probably needs to use DRIVER_MODULE_ORDERED() to ensure the other modules in its kld are registered with new-bus before it tries to attach to devices. -- John Baldwin
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