Re: [LAD] Basic Question: SND/SOUND Libraries Seem to be Missing

2010-09-13 Thread Rory Filer 
On Mon, Sep 13, 2010 at 11:01 AM, Robin Gareus ro...@gareus.org wrote:

 On 09/13/2010 07:49 PM, Rory Filer wrote:
  On Sun, Sep 12, 2010 at 2:40 PM, Robin Gareus ro...@gareus.org wrote:
 
 
 
  Hi Rory,
 
  You're not missing a library but some other kernel modules which provide
  those symbols.
 
  After installing the kernel, run 'depmod' and try to load the module
  with 'modprobe snd-dummy' instead of 'insmod snd-dummy.ko'.
 
 
  Hi Robin,
 
  I appreciate your reply. Unfortunately my embedded system doesn't have
  depmod configured so I'll have to try adding it to Busybox first.

 depmod/modprobe is basically just a handy way to automatically load
 module dependencies. It may or may not be overkill for an embedded system.

 FWIW, you should be able to run 'depmod' to generate modules.dep on the
 system where you built the kernel. The target system only needs modprobe.

 Did you try to run 'insmod snd.ko snd_pcm.ko' manually before the
 'insmod snd-dummy.ko'. That should work as well.


Hi Robin,

It was reply-to munging that got me on that previous reply.

I think there might be some weird stuff with the build/make utility on my
target
which builds the sound files but isn't seeming to include them in my kernel
image.
I'll try and figure out all that before rattling the list again.

Thanks for your assistance.

Rory
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Re: [LAD] Basic Question: SND/SOUND Libraries Seem to be Missing

2010-09-12 Thread Robin Gareus 
On 09/12/2010 09:17 PM, Rory Filer wrote:
 Hello,
 
 Let me point out in advance that my problem is pretty trivial compared to
 most of the postings on that list. If a journey in sound engineering on
 Linux is 1000 steps, I'm at step 1 here. I basically tried configuring sound
 into the kernel but it didn't seem to work. If you think you can help,
 please read on. Otherwise, stop here.
 
 And thanks to all who continue from here...
 
 I want to build sound support into my embedded Linux platform (2.6.28); the
 CPU supports I2S in silicon, but I haven't got a driver for that yet. My
 plan is to build the kernel with SOUND/SND configurations enabled and start
 working on the driver later. In my configurations, I've left all the sound
 card-specific options out, keeping just the CONFIG_SND_SOC. I thought it
 would be sufficient to install snd-dummy so that any cross-compiled audio
 applications could be fooled into working. l rebuilt the kernel after *make
 clean* and noted several new SND files being compiled. So far so good. The
 final zImage was only a little larger. Overall, the configuration and build
 seemed to be going through all the right motions, but when I loaded zImage
 onto the target I didn't see any bootup logging that suggested audio was now
 working. As an experiment, I tried to insmod snd_dummy.ko but got a long
 list of errors. I guess I'm missing something basic.
 
 Here's my configuration choices:
 
 CONFIG_SOUND=m
 CONFIG_SOUND_OSS_CORE=y
 CONFIG_SND=m
 CONFIG_SND_TIMER=m
 CONFIG_SND_PCM=m
 # CONFIG_SND_SEQUENCER is not set
 CONFIG_SND_OSSEMUL=y
 CONFIG_SND_MIXER_OSS=m
 CONFIG_SND_PCM_OSS=m
 CONFIG_SND_PCM_OSS_PLUGINS=y
 # CONFIG_SND_DYNAMIC_MINORS is not set
 CONFIG_SND_SUPPORT_OLD_API=y
 CONFIG_SND_VERBOSE_PROCFS=y
 # CONFIG_SND_VERBOSE_PRINTK is not set
 # CONFIG_SND_DEBUG is not set
 CONFIG_SND_DRIVERS=y
 # CONFIG_SND_PCSP is not set
 CONFIG_SND_DUMMY=m
 # CONFIG_SND_MTPAV is not set
 # CONFIG_SND_MTS64 is not set
 # CONFIG_SND_SERIAL_U16550 is not set
 # CONFIG_SND_MPU401 is not set
 # CONFIG_SND_PORTMAN2X4 is not set
 # CONFIG_SND_ISA is not set
 # CONFIG_SND_PCI is not set
 # CONFIG_SND_SPI is not set
 # CONFIG_SND_USB is not set
 # CONFIG_SND_PCMCIA is not set
 CONFIG_SND_SOC=m
 CONFIG_SND_SOC_ALL_CODECS=m
 CONFIG_SND_SOC_AD73311=m
 CONFIG_SND_SOC_AK4535=m
 CONFIG_SND_SOC_CS4270=m
 CONFIG_SND_SOC_SSM2602=m
 CONFIG_SND_SOC_TLV320AIC23=m
 CONFIG_SND_SOC_TLV320AIC26=m
 CONFIG_SND_SOC_TLV320AIC3X=m
 CONFIG_SND_SOC_UDA1380=m
 CONFIG_SND_SOC_WM8510=m
 CONFIG_SND_SOC_WM8580=m
 CONFIG_SND_SOC_WM8731=m
 CONFIG_SND_SOC_WM8750=m
 CONFIG_SND_SOC_WM8753=m
 CONFIG_SND_SOC_WM8900=m
 CONFIG_SND_SOC_WM8903=m
 CONFIG_SND_SOC_WM8971=m
 CONFIG_SND_SOC_WM8990=m
 # CONFIG_SOUND_PRIME is not set

 
 And here is the list of errors from installing snd-dummy.ko
 
 [r...@127 drivers]#insmod snd-dummy.ko
 Using snd-dummy.ko
 snd_dummy: Unknown symbol snd_pcm_lib_free_pages
 snd_dummy: Unknown symbol snd_pcm_set_ops
 snd_dummy: Unknown symbol snd_ctl_boolean_stereo_info
 snd_dummy: Unknown symbol snd_card_new
 snd_dummy: Unknown symbol snd_pcm_lib_ioctl
 snd_dummy: Unknown symbol snd_pcm_lib_malloc_pages
 snd_dummy: Unknown symbol snd_pcm_lib_preallocate_pages_for_all
 snd_dummy: Unknown symbol snd_card_free
 snd_dummy: Unknown symbol snd_ctl_add
 snd_dummy: Unknown symbol snd_pcm_new
 snd_dummy: Unknown symbol snd_pcm_suspend_all
 snd_dummy: Unknown symbol snd_pcm_period_elapsed
 snd_dummy: Unknown symbol snd_card_register
 snd_dummy: Unknown symbol snd_pcm_format_set_silence
 snd_dummy: Unknown symbol snd_pcm_format_width
 snd_dummy: Unknown symbol snd_ctl_new1
 insmod: cannot insert `snd-dummy.ko': Unknown symbol in module (-1): No such
 fil
 e or directory
 
 Best Regards,
 
 Rory

Hi Rory,

You're not missing a library but some other kernel modules which provide
those symbols.

IIRC the snd-dummy modules requires 'snd_pcm' and 'snd'.

After installing the kernel, run 'depmod' and try to load the module
with 'modprobe snd-dummy' instead of 'insmod snd-dummy.ko'.

See the man-page for modprobe and depmod for details.

HTH,
robin
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