ROC-RK3308B-CC-PLUS 如何修改DTS 以支持PDM

nolandPig

目前官方提供的roc-rk3308b-cc-plus dts 只有amic，没有dmic，需要如何修改dts才能支持pdm 麦克风阵列

nolandPig

Firefly_Javier 发表于 2022-6-8 19:15
https://gitlab.com/firefly-linux/kernel/-/blob/rk3308/firefly/arch/arm64/boot/dts/rockchip/rk3308b-r ...

你好，这个是roc-rk3308b-cc的，不是roc-rk3308b-cc-plus，不过我也试过，使用该dts时，内核启动有问题，串口打印一直卡在starting kernel......

nolandPig

好的多谢

nolandPig

Firefly_Javier 发表于 2022-6-9 13:15
这个dts同样适用于ROC-RK3308B-CC-PLUS，因为ROC-RK3308B-CC使用的调试串口是UART2，ROC-RK3308B-CC-PLUS ...

你好，我使用改后的dts，内核可以正常起来，但是使用arecord录音时，好像时钟有点问题

# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: rockchiprk3308v [rockchip,rk3308-vad], device 0: dailink-multicodecs multicodec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: UAC1Gadget [UAC1_Gadget], device 0: UAC1_PCM [UAC1_PCM]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 7: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 7: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
  Subdevices: 7/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
#

录音
# arecord -f dat -t wav -r 48000 -c 8 -D hw:0,0 test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Channels 8
[  142.674604] clk_pdm_frac parent_rate(589823999) is low than rate(61440000)*20, fractional div is not allowed
[  142.676548] dma-pl330 ff2d0000.dma-controller: pl330_submit_req:1680 Try increasing mcbufsz (372/256)
[  142.676603] dma-pl330 ff2d0000.dma-controller: fill_queue:2211 Bad Desc(3)
[  142.676627] dma-pl330 ff2d0000.dma-controller: pl330_submit_req:1680 Try increasing mcbufsz (372/256)
[  142.676642] dma-pl330 ff2d0000.dma-controller: fill_queue:2211 Bad Desc(3)

nolandPig

Firefly_Javier 发表于 2022-6-9 16:06
windows装个软件Audacity，分析下音频文件中，8个通道是否有通道录到音了，一般有波形就说明通道有录取到音 ...

你好，没有波形