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器件型号：TDA4VM Thread 中讨论的其他器件： PCM3168A
工具与软件：
配置如下：
平台：TDA4VM
SDK：08_05_00
我已经完成了一些检查：
1.检查设备:
root@j7-evm:~# aplay -l aplay: device_list:272: no soundcards found...
2.检查模块：
root@j7-evm:~# lsmod | grep snd snd_soc_j721e_evm 32768 0 snd_soc_pcm3168a_i2c 16384 0 snd_soc_pcm3168a 32768 1 snd_soc_pcm3168a_i2c
3.启动时出现一些故障
root@j7-evm:~# dmesg | grep snd [ 12.108025] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.640075] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.891715] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.904619] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.922237] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.947454] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.956215] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 12.976936] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.006818] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.048758] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.064626] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.086060] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.106016] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.122092] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.142373] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.243471] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.260072] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.269130] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.283268] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.752601] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.760274] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.852527] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.860050] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.934773] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 13.942894] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517 [ 14.298839] j721e-audio sound@0: devm_snd_soc_register_card() failed: -517
4. 列出/dev/snd 但看不到"PCM..."
root@j7-evm:~# ls /dev/snd/ timer
5.在总线3上检测 I2C、但发现 PCM3168A (即0x20)的地址繁忙(即 UU)
root@j7-evm:~# i2cdetect -y -r 3
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: UU -- UU -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- 6d -- --
70: 70 71 -- -- -- -- 76 --
我想知道音频编解码器 PCM3168A 是否有问题？
如何调试呢？
提前感谢
