Linux 3.7 ALSA sound support for iMX233?

[Landoro]

Hello everyone, I've been struggling to get a proper working kernel with audio support. I tried literally every single idea you guys have posted. I'm sharing the kernel oops:


The moment I try to run alsamixer, aplay -l, amixer, the system just freezes and I can't kill those processes!
I really need an explanation for this.


[    3.790000]  mmcblk0: p1 p2
[    3.830000] mxs-sgtl5000 sound: failed to get mclk
[    3.840000] mxs-sgtl5000: probe of sound failed with error -22
[    3.850000] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[    3.870000] mxs-builtin-audio mxs-builtin-audio: mxs-builtin-codec-dai <-> 80048000.mxs-builtin-cpu-dai mapping ok
[    4.150000] ALSA device list:
[    4.150000]   #0: mxs-builtin-audio
[   32.250000] sgtl5000 0-000a: Failed to get mclock: -2
[   32.330000] i2c 0-000a: Driver sgtl5000 requests probe deferral
[   32.590000] sgtl5000 0-000a: Failed to get mclock: -2
[   32.690000] i2c 0-000a: Driver sgtl5000 requests probe deferral
[   32.790000] sgtl5000 0-000a: Failed to get mclock: -2
[   32.790000] i2c 0-000a: Driver sgtl5000 requests probe deferral
[   34.440000] Unable to handle kernel NULL pointer dereference at virtual address 00000004
[   34.520000] pgd = c2f4c000
[   34.650000] [00000004] *pgd=42f3d831, *pte=00000000, *ppte=00000000
[   34.650000] Internal error: Oops: 17 [#1] PREEMPT ARM

Rado

[swahren]

Hi Rado,

could you please post the kernel version and it's relevant config / DTS?

Stefan

[Landoro]

Hello Stefan, I've used the latest rootfs:

http://archlinuxarm.org/os/ArchLinuxARM-armv5-latest.tar.gz

+
u-boot.sb

[root@alarm ~]# uname -a
Linux alarm 3.19.3-1-ARCH #1 PREEMPT Fri Mar 27 19:59:26 MDT 2015 armv5tejl GNU/

The reason I need a working kernel is because every time I try to build a kernel by the www.jann.cc method:
http://www.jann.cc/2012/08/23/building_a_kernel_3_x_for_the_olinuxino_from_sources.html
I never get the zImage file? It never really compiles.
I've been on this for a month, researching how to make it work, it's for an audio project, but I'm seriously stuck.

[swahren]

Hi Rado,

i've looked at https://github.com/archlinuxarm/PKGBUILDs/tree/master/core/linux-armv5

and some of the audio patches are old or looks strange to me.

Maybe you should post the problem at archlinuxarm.org first.

Stefan

[Chris]

I'm wondering why it's so hard to enable sound on kernel >= 3.7 as there are kernel driver options for MXS audio:

Code Select Expand

Device Drivers  --->     
  <*> Sound card support  --->
   <*>   Advanced Linux Sound Architecture  --->     
    <*>   ALSA for SoC audio support  --->
     <*>   SoC Audio for Freescale MXS CPUs  --->
      <*>   SoC Audio support for MXS boards with sgtl5000 
    
Someone maybe just tried these...?

[swahren]

SGTL5000 codec is only for MX28 not for MX23. Unfortunately this option is misleading.

[Chris]

Anyone here who can help building a 3.x kernel w/ working audio?
I cloned github.com/ITserve/imx23-audio, enabled the "SoC Audio for Freescale i.MX23 built-in codec" in menuconfig and did a successful clean build. Olinuxino (maxi) boots fine, but still says

Code Select Expand

[    1.480000] ALSA device list:
[    1.480000]   No soundcards found.
Did I forget any step before??
Any help is welcome!

Chris

[swahren]

I never tested the audio driver.

But do you use the modified imx23-olinuxino-audio.dts from the repository?

[Chris]

Oh yes, imx23-audio.dts was missing, thanks for the hint!

By the way: Anyone here who ported the driver to kernel 4.x ? Taking the new and modified files from  github.com/ITserve/imx23-audio and patching a kernel 4.x won't compile. :-(

[swahren]

It seems that Archlinux maintained these patches until Kernel 4.1:

https://github.com/archlinuxarm/PKGBUILDs/tree/c057ac8267323a3b71394593a742887334fe5275/core/linux-armv5

Maybe this is helpful.

[swahren]

Okay, i applied these patches against 4.3-rc1, but there were compiler errors.

I tried to fixed them and pushed it in my lcd repo:

https://github.com/lategoodbye/linux-lcd6610

Warning: I tested only that my mx233 still boot, but no functional tests.

[Chris]

What does dmesg say?

Code Select Expand

ALSA device list:
  #0: mxs-builtin-audio
or

Code Select Expand

ALSA device list:
  No soundcards found.


And what does

Code Select Expand

aplay -l say?

[swahren]

First of all, i need to say that i configured the driver as module.

Also i noticed that my rootfs didn't contain any alsa stuff. So i installed the alsa-utils. But now i get a kernel oops :-(

Code Select Expand


[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 4.3.0-rc1-next-20150914-g4657771-dirty (user@Duckbill) (gcc version 4.4.4 (4.4.4_09.06.2010) ) #6 Sat Sep 26 09:24:28 UTC 2015
[    0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine model: i.MX23 Olinuxino Low Cost Board
[    0.000000] Memory policy: Data cache writeback
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16240
[    0.000000] Kernel command line: console=ttyAMA0,115200 root=/dev/mmcblk0p2 no_console_suspend=1
[    0.000000] PID hash table entries: 256 (order: -2, 1024 bytes)
[    0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[    0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Memory: 48612K/65536K available (5565K kernel code, 351K rwdata, 1800K rodata, 248K init, 8201K bss, 16924K reserved, 0K cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xc4800000 - 0xff000000   ( 936 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)
[    0.000000]       .text : 0xc0008000 - 0xc0739a5c   (7367 kB)
[    0.000000]       .init : 0xc073a000 - 0xc0778000   ( 248 kB)
[    0.000000]       .data : 0xc0778000 - 0xc07cfdf8   ( 352 kB)
[    0.000000]        .bss : 0xc07cfdf8 - 0xc0fd254c   (8202 kB)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Running RCU self tests
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] clocksource: mxs_timer: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 911346093 ns
[    0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836475000000ns
[    0.000000] Console: colour dummy device 80x30
[    0.000000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[    0.000000] ... MAX_LOCKDEP_SUBCLASSES:  8
[    0.000000] ... MAX_LOCK_DEPTH:          48
[    0.000000] ... MAX_LOCKDEP_KEYS:        8191
[    0.000000] ... CLASSHASH_SIZE:          4096
[    0.000000] ... MAX_LOCKDEP_ENTRIES:     32768
[    0.000000] ... MAX_LOCKDEP_CHAINS:      65536
[    0.000000] ... CHAINHASH_SIZE:          32768
[    0.000000]  memory used by lock dependency info: 5167 kB
[    0.000000]  per task-struct memory footprint: 1536 bytes
[    0.070000] Calibrating delay loop... 226.09 BogoMIPS (lpj=1130496)
[    0.070000] pid_max: default: 32768 minimum: 301
[    0.070000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.070000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.080000] Initializing cgroup subsys memory
[    0.080000] CPU: Testing write buffer coherency: ok
[    0.080000] Setting up static identity map for 0x40008400 - 0x40008458
[    0.110000] devtmpfs: initialized
[    0.160000] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.160000] pinctrl core: initialized pinctrl subsystem
[    0.180000] NET: Registered protocol family 16
[    0.190000] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.290000] Serial: AMBA PL011 UART driver
[    0.300000] 80070000.serial: ttyAMA0 at MMIO 0x80070000 (irq = 17, base_baud = 0) is a PL011 rev2
[    0.500000] console [ttyAMA0] enabled
[    0.600000] mxs-dma 80004000.dma-apbh: initialized
[    0.620000] mxs-dma 80024000.dma-apbx: initialized
[    0.630000] SCSI subsystem initialized
[    0.640000] usbcore: registered new interface driver usbfs
[    0.650000] usbcore: registered new interface driver hub
[    0.650000] usbcore: registered new device driver usb
[    0.660000] pps_core: LinuxPPS API ver. 1 registered
[    0.670000] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.670000] PTP clock support registered
[    0.680000] Advanced Linux Sound Architecture Driver Initialized.
[    0.700000] clocksource: Switched to clocksource mxs_timer
[    1.090000] FS-Cache: Loaded
[    1.090000] CacheFiles: Loaded
[    1.240000] NET: Registered protocol family 2
[    1.260000] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[    1.270000] TCP bind hash table entries: 1024 (order: 3, 36864 bytes)
[    1.270000] TCP: Hash tables configured (established 1024 bind 1024)
[    1.280000] UDP hash table entries: 256 (order: 2, 20480 bytes)
[    1.290000] UDP-Lite hash table entries: 256 (order: 2, 20480 bytes)
[    1.300000] NET: Registered protocol family 1
[    1.300000] NetWinder Floating Point Emulator V0.97 (double precision)
[    1.320000] futex hash table entries: 256 (order: 1, 11264 bytes)
[    1.490000] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
[    1.540000] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[    1.550000] io scheduler noop registered (default)
[    1.590000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.600000] usbcore: registered new interface driver usb-storage
[    1.620000] ci_hdrc ci_hdrc.0: EHCI Host Controller
[    1.630000] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[    1.660000] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[    1.680000] hub 1-0:1.0: USB hub found
[    1.690000] hub 1-0:1.0: 1 port detected
[    1.710000] mousedev: PS/2 mouse device common for all mice
[    1.730000] stmp3xxx-rtc 8005c000.rtc: rtc core: registered 8005c000.rtc as rtc0
[    1.740000] i2c /dev entries driver
[    1.760000] stmp3xxx_rtc_wdt stmp3xxx_rtc_wdt: initialized watchdog with heartbeat 19s
[    1.770000] 80010000.ssp supply vmmc not found, using dummy regulator
[    1.820000] mxs-mmc 80010000.ssp: initialized
[    1.850000] usbcore: registered new interface driver usbhid
[    1.860000] usbhid: USB HID core driver
[    1.870000] mmc0: host does not support reading read-only switch, assuming write-enable
[    1.890000] mmc0: new high speed SDHC card at address 0001
[    1.910000] mmcblk0: mmc0:0001 00000 14.9 GiB
[    1.940000] NET: Registered protocol family 10
[    1.950000]  mmcblk0: p1 p2 p3
[    1.980000] mip6: Mobile IPv6
[    2.000000] sit: IPv6 over IPv4 tunneling driver
[    2.020000] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[    2.030000] ip6_gre: GRE over IPv6 tunneling driver
[    2.040000] NET: Registered protocol family 17
[    2.040000] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.
[    2.060000] Key type dns_resolver registered
[    2.070000] registered taskstats version 1
[    2.100000] stmp3xxx-rtc 8005c000.rtc: setting system clock to 1970-01-01 00:00:06 UTC (6)
[    2.160000] ALSA device list:
[    2.160000]   No soundcards found.
[    2.180000] uart-pl011 80070000.serial: no DMA platform data
[    2.190000] hub 1-1:1.0: USB hub found
[    2.200000] hub 1-1:1.0: 3 ports detected
[    2.230000] EXT2-fs (mmcblk0p2): error: couldn't mount because of unsupported optional features (244)
[    2.250000] EXT4-fs (mmcblk0p2): couldn't mount as ext3 due to feature incompatibilities
[    2.270000] EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem
[    2.270000] EXT4-fs (mmcblk0p2): write access will be enabled during recovery
[    2.490000] usb 1-1.1: new high-speed USB device number 3 using ci_hdrc
[    2.540000] EXT4-fs (mmcblk0p2): recovery complete
[    2.570000] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    2.570000] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[    2.590000] devtmpfs: mounted
[    2.600000] Freeing unused kernel memory: 248K (c073a000 - c0778000)
[    3.180000] random: systemd urandom read with 15 bits of entropy available
[    3.220000] systemd[1]: systemd 215 running in system mode. (+PAM +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ -SECCOMP -APPARMOR)
[    3.240000] systemd[1]: Detected architecture 'arm'.

Welcome to Debian GNU/Linux 8 (jessie)!

[    3.340000] systemd[1]: Set hostname to <duckbill>.
[    5.130000] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-manager.service failed to load: No such file or directory.
[    5.160000] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.
[    5.180000] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[    5.190000] systemd[1]: Expecting device dev-ttyAMA0.device...
         Expecting device dev-ttyAMA0.device...
[    5.220000] systemd[1]: Starting Remote File Systems (Pre).
[  OK  ] Reached target Remote File Systems (Pre).
[    5.250000] systemd[1]: Reached target Remote File Systems (Pre).
[    5.250000] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[    5.260000] systemd[1]: Starting Dispatch Password Requests to Console Directory Watch.
[    5.280000] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[    5.280000] systemd[1]: Starting Paths.
[  OK  ] Reached target Paths.
[    5.310000] systemd[1]: Reached target Paths.
[    5.310000] systemd[1]: Starting Encrypted Volumes.
[  OK  ] Reached target Encrypted Volumes.
[    5.340000] systemd[1]: Reached target Encrypted Volumes.
[    5.340000] systemd[1]: Starting Swap.
[  OK  ] Reached target Swap.
[    5.370000] systemd[1]: Reached target Swap.
[    5.370000] systemd[1]: Starting Root Slice.
[  OK  ] Created slice Root Slice.
[    5.400000] systemd[1]: Created slice Root Slice.
[    5.400000] systemd[1]: Starting User and Session Slice.
[  OK  ] Created slice User and Session Slice.
[    5.440000] systemd[1]: Created slice User and Session Slice.
[    5.440000] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
[  OK  ] Listening on /dev/initctl Compatibility Named Pipe.
[    5.480000] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[    5.480000] systemd[1]: Starting Delayed Shutdown Socket.
[  OK  ] Listening on Delayed Shutdown Socket.
[    5.520000] systemd[1]: Listening on Delayed Shutdown Socket.
[    5.520000] systemd[1]: Starting Journal Socket (/dev/log).
[  OK  ] Listening on Journal Socket (/dev/log).
[    5.560000] systemd[1]: Listening on Journal Socket (/dev/log).
[    5.560000] systemd[1]: Starting udev Control Socket.
[  OK  ] Listening on udev Control Socket.
[    5.600000] systemd[1]: Listening on udev Control Socket.
[    5.600000] systemd[1]: Starting udev Kernel Socket.
[  OK  ] Listening on udev Kernel Socket.
[    5.630000] systemd[1]: Listening on udev Kernel Socket.
[    5.630000] systemd[1]: Starting Journal Socket.
[  OK  ] Listening on Journal Socket.
[    5.660000] systemd[1]: Listening on Journal Socket.
[    5.660000] systemd[1]: Starting System Slice.
[  OK  ] Created slice System Slice.
[    5.690000] systemd[1]: Created slice System Slice.
[    5.690000] systemd[1]: Starting system-getty.slice.
[  OK  ] Created slice system-getty.slice.
[    5.730000] systemd[1]: Created slice system-getty.slice.
[    5.730000] systemd[1]: Starting system-serial\x2dgetty.slice.
[  OK  ] Created slice system-serial\x2dgetty.slice.
[    5.770000] systemd[1]: Created slice system-serial\x2dgetty.slice.
[    5.780000] systemd[1]: Starting Increase datagram queue length...
         Starting Increase datagram queue length...
[    5.860000] systemd[1]: Starting Create list of required static device nodes for the current kernel...
         Starting Create list of required static device nodes...rrent kernel...
[    5.970000] systemd[1]: Mounted POSIX Message Queue File System.
[    6.010000] systemd[1]: Starting Load Kernel Modules...
         Starting Load Kernel Modules...
[    6.160000] systemd[1]: Mounted Huge Pages File System.
[    6.190000] systemd[1]: Starting udev Coldplug all Devices...
         Starting udev Coldplug all Devices...
[    6.280000] systemd[1]: Mounting Debug File System...
         Mounting Debug File System...
[    6.500000] systemd[1]: Started Set Up Additional Binary Formats.
[    6.540000] systemd[1]: Starting Slices.
[  OK  ] Reached target Slices.
[    6.560000] systemd[1]: Reached target Slices.
[    6.560000] systemd[1]: Starting Remount Root and Kernel File Systems...
         Starting Remount Root and Kernel File Systems...
[  OK  ] Started Increase datagram queue length.
[    6.850000] systemd[1]: Started Increase datagram queue length.
[  OK  ] Started Create list of required static device nodes ...current kernel.
[    7.110000] systemd[1]: Started Create list of required static device nodes for the current kernel.
[  OK  ] Started Load Kernel Modules.
[    7.190000] systemd[1]: Started Load Kernel Modules.
[    7.200000] EXT4-fs (mmcblk0p2): re-mounted. Opts: commit=60
[  OK  ] Mounted Debug File System.
[    7.230000] systemd[1]: Mounted Debug File System.
[  OK  ] Started Remount Root and Kernel File Systems.
[    7.310000] systemd[1]: Started Remount Root and Kernel File Systems.
[    8.350000] systemd[1]: Started Various fixups to make systemd work better on Debian.
[    8.370000] systemd[1]: Starting Load/Save Random Seed...
         Starting Load/Save Random Seed...
[    8.450000] systemd[1]: Mounted Configuration File System.
[    8.480000] systemd[1]: Mounted FUSE Control File System.
[    8.480000] systemd[1]: Starting Apply Kernel Variables...
         Starting Apply Kernel Variables...
[    8.620000] systemd[1]: Starting Create Static Device Nodes in /dev...
         Starting Create Static Device Nodes in /dev...
[    8.800000] systemd[1]: Starting Syslog Socket.
[  OK  ] Listening on Syslog Socket.
[    8.860000] systemd[1]: Listening on Syslog Socket.
[    8.860000] systemd[1]: Starting Journal Service...
         Starting Journal Service...
[  OK  ] Started Journal Service.
[    9.090000] systemd[1]: Started Journal Service.
[  OK  ] Started Load/Save Random Seed.
[  OK  ] Started Apply Kernel Variables.
[  OK  ] Started Create Static Device Nodes in /dev.
[  OK  ] Started udev Coldplug all Devices.
         Starting udev Kernel Device Manager...
[  OK  ] Reached target Local File Systems (Pre).
[  OK  ] Reached target Local File Systems.
         Starting Create Volatile Files and Directories...
[  OK  ] Reached target Remote File Systems.
         Starting Trigger Flushing of Journal to Persistent Storage...
         Starting LSB: Raise network interfaces....
[   10.700000] systemd-udevd[76]: starting version 215
[  OK  ] Started udev Kernel Device Manager.
[  OK  ] Started Create Volatile Files and Directories.
[   12.140000] systemd-journald[72]: Received request to flush runtime journal from PID 1
[  OK  ] Started Trigger Flushing of Journal to Persistent Storage.
         Starting Update UTMP about System Boot/Shutdown...
         Starting Copy rules generated while the root was ro...
[  OK  ] Started Copy rules generated while the root was ro.
[  OK  ] Started Update UTMP about System Boot/Shutdown.
[   15.830000] mxs-builtin-audio mxs-builtin-audio: ASoC: CPU DAI (null) not registered
[   15.830000] mxs-builtin-audio mxs-builtin-audio: snd_soc_register_card failed (-517)
[   16.050000] mxs-builtin-audio mxs-builtin-audio: ASoC: CPU DAI (null) not registered
[   16.060000] mxs-builtin-audio mxs-builtin-audio: snd_soc_register_card failed (-517)
[   16.110000] mxs_lradc: module is from the staging directory, the quality is unknown, you have been warned.
[   16.270000] mxs-builtin-audio mxs-builtin-audio: mxs-builtin-codec-dai <-> 80048000.mxs-builtin-cpu-dai mapping ok
[  OK  ] Found device /dev/ttyAMA0.
[  OK  ] Reached target Sound Card.
[   20.620000] Unable to handle kernel NULL pointer dereference at virtual address 00000004
[   20.620000] pgd = c2eb8000
[   20.630000] [00000004] *pgd=42ee8831, *pte=00000000, *ppte=00000000
[   20.630000] Internal error: Oops: 17 [#1] ARM
[   20.630000] Modules linked in: mxs_lradc(C) snd_soc_mxs_builtin_dai snd_soc_mxs_builtin_codec snd_soc_mxs_builtin_pcm industrialio_triggered_buffer snd_soc_mxs_builtin_audio
[   20.630000] CPU: 0 PID: 125 Comm: alsactl Tainted: G         C      4.3.0-rc1-next-20150914-g4657771-dirty #6
[   20.630000] Hardware name: Freescale MXS (Device Tree)
[   20.630000] task: c2dbda00 ti: c2eaa000 task.ti: c2eaa000
[   20.630000] PC is at dac_put_volsw+0x20/0x54 [snd_soc_mxs_builtin_codec]
[   20.630000] LR is at snd_ctl_elem_write_user+0x148/0x210
[   20.630000] pc : [<bf00c264>]    lr : [<c03fe7a4>]    psr: 60000013
[   20.630000] sp : c2eabe58  ip : c377ca80  fp : 00000000
[   20.630000] r10: 00000001  r9 : c377cab8  r8 : c37b73c4
[   20.630000] r7 : c37b7720  r6 : 011018e0  r5 : c37b7000  r4 : c37eac00
[   20.630000] r3 : 00000000  r2 : 00e60000  r1 : c37eac00  r0 : bf00cacc
[   20.630000] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[   20.630000] Control: 0005317f  Table: 42eb8000  DAC: 00000051
[   20.630000] Process alsactl (pid: 125, stack limit = 0xc2eaa190)
[   20.630000] Stack: (0xc2eabe58 to 0xc2eac000)
[   20.630000] be40:                                                       00000000 c0fa0704
[   20.630000] be60: 00000001 00000000 c2dbde08 c00590bc 00000000 00000070 0000005b b6dc0000
[   20.630000] be80: 00000000 c2c01254 00000000 60000013 00000000 80000005 c2c85513 c2ed1980
[   20.630000] bea0: c37b7000 00000004 011018e0 c2eaa000 00000000 c03ff754 00000070 c00518b4
[   20.630000] bec0: c2eabfb0 c0018f68 00000200 c0055500 c0785460 c0785460 c0785ca0 c0552c20
[   20.630000] bee0: c0785460 00000000 00000000 00000005 c077f72c b6dcdd4c c2eabfb0 011018e0
[   20.630000] bf00: c37af360 c2e38060 00000004 00000004 c2eaa000 00000000 00000000 c01244d4
[   20.630000] bf20: 00000100 c0023738 c07d05a8 00000000 00000000 c0023b70 0000001c c3418000
[   20.630000] bf40: 0110162a 00000004 0000000a ffff92dd 00400000 00000001 00000000 c3418000
[   20.630000] bf60: 00000000 c3414260 00000000 c37af360 c37af360 011018e0 c2c85513 00000004
[   20.630000] bf80: c2eaa000 00000000 00000000 c0124bcc bed76fdc 010f8038 00000002 00000036
[   20.630000] bfa0: c00103e8 c0010240 bed76fdc 010f8038 00000004 c2c85513 011018e0 010f8558
[   20.630000] bfc0: bed76fdc 010f8038 00000002 00000036 00000001 00000000 0000000a 00000000
[   20.630000] bfe0: b6ee142c bed768d4 b6e4b9c8 b6cbe36c 20000010 00000004 00000000 00000000
[   20.630000] [<bf00c264>] (dac_put_volsw [snd_soc_mxs_builtin_codec]) from [<c03fe7a4>] (snd_ctl_elem_write_user+0x148/0x210)
[   20.630000] [<c03fe7a4>] (snd_ctl_elem_write_user) from [<c03ff754>] (snd_ctl_ioctl+0x164/0x738)
[   20.630000] [<c03ff754>] (snd_ctl_ioctl) from [<c01244d4>] (do_vfs_ioctl+0x74/0x734)
[   20.630000] [<c01244d4>] (do_vfs_ioctl) from [<c0124bcc>] (SyS_ioctl+0x38/0x5c)
[   20.630000] [<c0124bcc>] (SyS_ioctl) from [<c0010240>] (ret_fast_syscall+0x0/0x1c)
[   20.630000] Code: e0802002 e5d22068 e5933084 e1a02802 (e5933004)
[   20.900000] ---[ end trace ed1d71c7af464ff3 ]---


[swahren]

Okay, i commited a bugfix for the kernel oops and here are the results of aplay:

Code Select Expand


# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: mxsbuiltinaudio [mxs-builtin-audio], device 0: MXS ADC/DAC mxs-builtin-codec-dai-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0


[Chris]

Looks much better, thank you! +1