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This article analyzes "what if there is no sound in MT7621 ALSA aplay playback". The content is detailed and easy to understand. Friends who are interested in "how to play MT7621 ALSA aplay without sound" can follow the editor's train of thought to read it. I hope it will be helpful to you after reading. Let's follow the editor to learn more about "how to play MT7621 ALSA aplay without sound".

Error record: I2S: i2s_tx_enable done I2S: I2S_TXENABLE done I2S: i2s_dma_unmask_handler ch=4 I2S: TXBE rang 0 wag0 [iLiang1je canti4] I2S: i2s_dma_tx_unmask_handler ch=5 GdmaUnMaskIntCallback I2S: TXBE rang 0 wk 0 [ife2m cantilever 5] I2S: do unmask ch6 tisr=2 in tx_isr

Do MT7621 audio playback, can compile the firmware, but there is no sound, finally solved, post it and record it:

1. I2S support is required for ALSA. To add I2S driver,

2. Modify linux-2.6.36.x/drivers/char/i2s/i2s_ctrl.h / / # define CONFIG_I2S_MS_CTRL

/ / # define CONFIG_I2S_MS_MODE, just remove the comments.

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