[alsa-devel] Alsa-driver compile fail on Ubuntu powerpc

[Takashi Iwai]

At Mon, 18 Aug 2008 18:26:40 +0700,
nguyen tritai wrote:
> 
> Takashi,
> 
> Now I can build and install driver for ca0106 sb Audigy but I got another
> issue when play an example file.
> >> aplay -vv child.wav
> Playing WAVE '/root/child.wav' : Unsigned 8 bit, Rate 22050 Hz, Mono
> Plug PCM: Rate conversion PCM (48000, sformat=U8)
> Its setup is:
>   stream       : PLAYBACK
>   access       : RW_INTERLEAVED
>   format       : U8
>   subformat    : STD
>   channels     : 1
>   rate         : 22050
>   exact rate   : 22050 (22050/1)
>   msbits       : 8
>   buffer_size  : 3763
>   period_size  : 470
>   period_time  : 21333
>   tstamp_mode  : NONE
>   period_step  : 1
>   avail_min    : 470
>   period_event : 0
>   start_threshold  : 3763
>   stop_threshold   : 3763
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 493223936
> Slave: Route conversion PCM (sformat=S32_LE)
>   Transformation table:
>     0 <- 0
>     1 <- 0
> Its setup is:
>   stream       : PLAYBACK
>   access       : MMAP_INTERLEAVED
>   format       : U8
>   subformat    : STD
>   channels     : 1
>   rate         : 48000
>   exact rate   : 48000 (48000/1)
>   msbits       : 8
>   buffer_size  : 8192
>   period_size  : 1024
>   period_time  : 21333
>   tstamp_mode  : NONE
>   period_step  : 1
>   avail_min    : 1024
>   period_event : 0
>   start_threshold  : 8192
>   stop_threshold   : 8192
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 1073741824
> Slave: Direct Stream Mixing PCM
> Its setup is:
>   stream       : PLAYBACK
>   access       : MMAP_INTERLEAVED
>   format       : S32_LE
>   subformat    : STD
>   channels     : 2
>   rate         : 48000
>   exact rate   : 48000 (48000/1)
>   msbits       : 32
>   buffer_size  : 8192
>   period_size  : 1024
>   period_time  : 21333
>   tstamp_mode  : NONE
>   period_step  : 1
>   avail_min    : 1024
>   period_event : 0
>   start_threshold  : 8192
>   stop_threshold   : 8192
>   silence_threshold: 0
>   silence_size : 0
>   boundary     : 1073741824
> Hardware PCM card 0 'CA0106' device 0 subdevice 0
> Its setup is:
>   stream       : PLAYBACK
>   access       : MMAP_INTERLEAVED
>   format       : S32_LE
>   subformat    : STD
>   channels     : 2
>   rate         : 48000
>   exact rate   : 48000 (48000/1)
>   msbits       : 32
>   buffer_size  : 8192
>   period_size  : 1024
>   period_time  : 21333
>   tstamp_mode  : ENABLE
>   period_step  : 1
>   avail_min    : 1024
>   period_event : 0
>   start_threshold  : 1
>   stop_threshold   : 1073741824
>   silence_threshold: 0
>   silence_size : 1073741824
>   boundary     : 1073741824
> #########         +                                | 35%Segmentation fault
> 
> Kernel dump message
> >> dmesg
> Unable to handle kernel paging request for data at address 0x00000000
> Faulting instruction address: 0xc0033fd4
> Oops: Kernel access of bad area, sig: 11 [#7]
> Canyonlands
> Modules linked in: snd_seq_midi snd_ca0106 snd_rawmidi snd_seq_oss
> snd_seq_midi_event snd_seq snd_seq_device snd_ac97_codec snd_pcm_oss
> snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd ac97_bus
> NIP: c0033fd4 LR: c004ac94 CTR: e901a6c8
> REGS: dfbf3d40 TRAP: 0300   Tainted: G      D    (2.6.26-00015-gc0b03c1-dirty)
> MSR: 00029000 <EE,ME>  CR: 48022444  XER: 20000000
> DEAR: 00000000, ESR: 00000000
> TASK = dfa57000[15245] 'aplay' THREAD: dfbf2000
> GPR00: c004ac94 dfbf3df0 dfa57000 00000000 c0b2c180 00000000 3f10c149 00000000
> GPR08: 00000000 00000000 9e370001 c030b10c 00000149 10025478 1000bd14 bff7ab68
> GPR16: c0320000 c030ae74 c0320000 00000000 00000000 00000000 00000000 de14c340
> GPR24: 4814b000 00000000 dfbf2000 de00c2c0 c0b2c180 00000000 00000000 c0b2c180
> NIP [c0033fd4] __wake_up_bit+0x10/0x40
> LR [c004ac94] unlock_page+0x48/0x5c
> Call Trace:
> [dfbf3e10] [c004ac94] unlock_page+0x48/0x5c
> [dfbf3e20] [c005a2d8] __do_fault+0x254/0x618
> [dfbf3e80] [c000faf0] do_page_fault+0x2d8/0x518
> [dfbf3f40] [c000d134] handle_page_fault+0xc/0x80
> Instruction dump:
> 7d6b4a14 800b0280 812b0278 20000020 7c630430 54631838 7c634a14 4e800020
> 7c0802a6 9421ffe0 90810008 90010024 <80030000> 90a1000c 7f801800 419e0014
> ---[ end trace a0b9d3bfbd44991b ]---
> 
> I tried with another example file.wav but the problem is the same.
> The issue seems from accessing memory.
> I'm using AMCC 460EX board with distribution Ubuntu-7.04

It's a known problem with non-coherent PPC architecture.
Try my sound-unstable-2.6 git tree (or alsa-driver-unstable snapshot).


Takashi