[求救] Time out:: Audio DMA buffdone time out!!! the time = 20005!

Chip Platform Rockchip
1

請教大神:
在 echo 1 > /sys/module/snd_soc_core/parameters/debug_audio_timeout
印出下列訊息:
[ 318.598704] Time out:: Audio DMA buffdone time out!!! the time = 20005!
[ 318.618374] Time out:: Audio DMA buffdone time out!!! the time = 19989!
[ 318.638050] Time out:: Audio DMA buffdone time out!!! the time = 19998!
[ 318.657720] Time out:: Audio DMA buffdone time out!!! the time = 19995!
[ 318.677399] Time out:: Audio DMA buffdone time out!!! the time = 19999!
[ 318.697077] Time out:: Audio DMA buffdone time out!!! the time = 19998!
[ 318.716757] Time out:: Audio DMA buffdone time out!!! the time = 20001!
[ 318.736438] Time out:: Audio DMA buffdone time out!!! the time = 20000!
[ 318.756115] Time out:: Audio DMA buffdone time out!!! the time = 19997!
[ 318.775797] Time out:: Audio DMA buffdone time out!!! the time = 20001!
[ 318.795479] Time out:: Audio DMA buffdone time out!!! the time = 19999!
[ 318.815153] Time out:: Audio DMA buffdone time out!!! the time = 19997!
[ 318.834837] Time out:: Audio DMA buffdone time out!!! the time = 20002!
[ 318.854515] Time out:: Audio DMA buffdone time out!!! the time = 19998!
[ 318.874193] Time out:: Audio DMA buffdone time out!!! the time = 19999!
[ 318.893873] Time out:: Audio DMA buffdone time out!!! the time = 20000!
[ 318.913552] Time out:: Audio DMA buffdone time out!!! the time = 19998!
[ 318.933770] Time out:: Audio DMA buffdone time out!!! the time = 20546!
[ 318.952927] Time out:: Audio DMA buffdone time out!!! the time = 19462!
[ 318.972597] Time out:: Audio DMA buffdone time out!!! the time = 19993!

請大神指點方向

2

echo 1 > /sys/module/snd_soc_core/parameters/debug_audio_timeout 基本上就是印出Timeout value而已

主要是因為 i2s 會隨機出現不正常的現象, 在追蹤問題出在哪?

解法是: 把 maxburst加大

sound/soc/rockchip/rk30_i2s.c

  •    i2s->playback_dma_data.maxburst = 1;

  •    i2s->playback_dma_data.maxburst = 4;

  •    i2s->capture_dma_data.maxburst = 1;

  •    i2s->capture_dma_data.maxburst = 4;

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請神人指點一下, 看這樣改會不會出問題