AM335X 配置TLVaic3104的问题

各位好：

 我正在配置音频，i2c,i2s都已经配置好了，并且启动时都可以识别ALSA list,可是在我播放事先保存的wav文件时，系统崩溃了，求解，求帮助，谢谢。

启动log如下：已经可以识别

+++++++++++++++zhouqun aic3x_i2c_probe
[    1.595245] control_type = SND_SOC_I2C
[    1.599273] ++++++snd_soc_register_codec:0
[    1.603698] +++++++++++++++zhouqun aic3x_i2c_probe
[    1.608795] control_type = SND_SOC_I2C
[    1.612792] ++++++snd_soc_register_codec:0
[    1.618621] ++++zhouqun am335x_evm?
[    1.623077] ++++++++++soc_bind_dai_link
[    1.627136] ++++++++zhouqun:binding TLV320AIC3X at idx 0
[    1.633026] +++++++++++++++ aic3x_probe
[    1.638793] ++++++++++++++aic3x_probe FINISHED
[    1.646301] +++++zhouqun:evm_aic3x_init
[    1.651947] asoc: tlv320aic3x-hifi <-> davinci-mcasp.0 mapping ok
[    1.664703] ALSA device list:
[    1.667877]   #0: AM335X EVM

播放音乐时崩溃log如下：

7777] 9700: df059784 df059710 c0018098 c00412b0 df0582f0 0000000b bf000000 00000008
[  525.386474] 9720: 65059888 63306131 20643030 64323965 30303864 34326520 30306263 35652034
[  525.395141] 9740: 31333039 28206332 33313565 34303030 c0002029 c0400e20 c04fd1a8 fffffffc
[  525.403869] 9760: 00000017 00000000 df059888 fffffffc c0056774 df058000 df05979c df059788
[  525.412567] 9780: c0400b44 c0017f88 df059888 df02ab80 df0597d4 df0597a0 c001a830 c0400af4
[  525.421264] 97a0: df0597cc df0597b0 c02137ac 00000017 c001a648 c05be75c fffffffc df059888
[  525.429962] 97c0: c0056774 df058000 df059884 df0597d8 c00083b0 c001a654 df059804 c05f9ecc
[  525.438659] 97e0: c0622550 0004d36a c05daa00 0000003c c0622550 c0622550 df05982c df059808
[  525.447357] 9800: c003e5c0 c0216c74 0000d3a6 0004d3a6 c05daa00 c05daa00 0004d3a6 ffff0000
[  525.456054] 9820: df059844 df059830 c003e820 c003e548 00000000 0004d3a6 df05987c df059848
[  525.464752] 9840: c003ebe8 c005b1c8 0004d3a6 00000000 c01cc7d0 df0598c4 df0598c4 00000003
[  525.473449] 9860: 00000042 c0056770 20000193 ffffffff df0598bc df02a8c0 df0598dc df059888
[  525.482147] 9880: c0014318 c0008380 df02a8c0 00000000 cb54ff11 00000000 00000000 df058000
[  525.490875] 98a0: c05da4b0 df02aa18 df02a8c0 c0056774 df058000 df0598dc df0598e0 df0598d0
[  525.499572] 98c0: c0052b94 c0056770 20000193 ffffffff df0598f4 df0598e0 c0052b94 c005676c
[  525.508270] 98e0: 00000020 c05da4b0 df05992c df0598f8 c0404908 c0052b8c 00000001 c0404afc
[  525.516967] 9900: c0056774 0000000b 00000000 df02ab80 00000001 c0056772 c0056774 df058000
[  525.525634] 9920: df05993c df059930 c0404afc c04046b8 df059974 df059940 c00418c4 c0404ab8
[  525.534332] 9940: 00000000 df0599ba df058000 c0056772 c0056774 df058000 df059974 df059968
[  525.543029] 9960: c003e534 00000001 df0599ec df059978 c0018098 c00412b0 df0582f0 0000000b
[  525.551727] 9980: bf000000 00000008 65059af0 63306131 20643030 64323965 30303864 34326520
[  525.560424] 99a0: 30306263 35652034 31333039 28206332 33313565 34303030 c0002029 c0400e20
[  525.569122] 99c0: c04fd1a8 fffffffc 00000017 00000000 df059af0 fffffffc c00384e8 df058000
[  525.577819] 99e0: df059a04 df0599f0 c0400b44 c0017f88 df059af0 df02ab80 df059a3c df059a08
[  525.586486] 9a00: c001a830 c0400af4 df059a34 df059a18 c02137ac 00000017 c001a648 c05be75c
[  525.595184] 9a20: fffffffc df059af0 c00384e8 df058000 df059aec df059a40 c00083b0 c001a654
[  525.603881] 9a40: df059a6c c05f9ecc c0622550 0004b055 c05daa00 0000003c c0622550 c0622550
[  525.612609] 9a60: df059a94 df059a70 c003e5c0 c0216c74 0000b091 0004b091 c05daa00 c05daa00
[  525.621276] 9a80: 0004b091 ffff0000 df059aac df059a98 c003e820 c003e548 00000000 0004b091
[  525.629974] 9aa0: df059ae4 df059ab0 c003ebe8 c005b1c8 0004b091 00000000 c01cc7d0 df059b2c
[  525.638671] 9ac0: df059b2c 00000003 00000042 c0056770 20000193 ffffffff df059b24 df02a8c0
[  525.647369] 9ae0: df059b44 df059af0 c0014318 c0008380 df02a8c0 00000000 cb54ff11 00000000
[  525.65606
 CTRL-A Z for help |115200 8N1 | NOR | Minicom 2.5    | VT102 | Online 00:11                                                          

附上播放音乐时崩溃的代码：

root@am335x-evm:/test# aplay -D hw:0,0 123.wav  
Playing WAVE '123.wav' : Signed 16 bit Little En[  299.717620] Unable to handle kernel NULL pointer dereference at virtual address 000c
dian, Rate 44100[  299.727325] pgd = c0004000
 Hz, Stereo
[  299.731567] [0000002c] *pgd=00000000
[  299.736511] Internal error: Oops: 17 [#1]
[  299.740783] Modules linked in: wl12xx_sdio(O)
[  299.745422] CPU: 0    Tainted: G        W  O  (3.2.0 #14)
[  299.751190] PC is at regulator_enable+0xc/0x220
[  299.755981] LR is at regulator_bulk_enable_async+0x18/0x20
[  299.761840] pc : [<c01f8500>]    lr : [<c01f872c>]    psr: 60000013
[  299.761840] sp : df05bed0  ip : df05bef8  fp : df05bef4
[  299.774017] r10: df7a98c0  r9 : df05a000  r8 : df7a98c8
[  299.779571] r7 : c005cb24  r6 : df014200  r5 : df015480  r4 : df1020c4
[  299.786499] r3 : 00000000  r2 : 0000001c  r1 : c01f8714  r0 : 00000000
[  299.793426] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
[  299.801177] Control: 10c5387d  Table: 9f398019  DAC: 00000015
[  299.807281] Process kworker/u:1 (pid: 8, stack limit = 0xdf05a2f0)
[  299.813842] Stack: (0xdf05bed0 to 0xdf05c000)
[  299.818481] bec0:                                     00000000 df1020c4 df015480 df014200
[  299.827178] bee0: c005cb24 df7a98c8 df05bf0c df05bef8 c01f872c c01f8500 00000000 c061f41c
[  299.835876] bf00: df05bf4c df05bf10 c005cb9c c01f8720 df1d1300 df7a98c8 df015480 df014200
[  299.844573] bf20: df05bf3c df05bf30 df7a98c8 df015480 df014200 c005cb24 00000000 00000000
[  299.853240] bf40: df05bf84 df05bf50 c0051598 c005cb30 c0633cb0 df015490 c0633cb0 df015480
[  299.861938] bf60: c0633cb0 df015490 c05dbeec c0633ca8 c0633ca8 df05a000 df05bfbc df05bf88
[  299.870666] bf80: c0051ef8 c0051488 df015480 c0051d7c 00000013 df035ee4 df015480 c0051d7c
[  299.879364] bfa0: 00000013 00000000 00000000 00000000 df05bff4 df05bfc0 c005661c c0051d88
[  299.888061] bfc0: df035ee4 00000000 df015480 00000000 df05bfd0 df05bfd0 00000000 df035ee4
[  299.896759] bfe0: c0056590 c00412a4 00000000 df05bff8 c00412a4 c005659c ffff0000 ffff0000
[  299.905426] Backtrace:

各位好：

  那个播放音乐崩溃的问题已经解决了，现在又遇到了新的问题，log在下面，请大家帮帮忙，看看额，新人一枚。

root@am335x-evm:/test# aplay -v 123.wav
Playing WAVE '123.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
Plug PCM: Hardware PCM card 0 'AM335X EVM' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 44100
  exact rate   : 44100 (44100/1)
  msbits       : 16
  buffer_size  : 32768
  period_size  : 2048
  period_time  : 46439
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 2048
  period_event : 0
  start_threshold  : 32768
  stop_threshold   : 32768
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0
[ 2454.069274] playback write error (DMA or IRQ trouble?)
aplay: pcm_write:1710: write error: Input/output error
root@am335x-evm:/test#

TI 的 FAE能帮忙看下吗？这种情况一般由什么原因导致呢？时钟配置个？谢谢阿。

我觉得这种情况, 基本在于时序控制, 发送的命令数据, 以及内部足够的延时的条件.

参考手册细细验证