小编科普一下RK3399 Audio的功能有哪些呢

答案对人有帮助，有参考价值 0

• NanoPC-T4 / Ubuntu-18.04 / Linux-4.4
  
  

• Audio Codec的型号：Realtek-ALC5651
  
• 控制：I2C1
  
• 数据：I2S0
  
• 耳机插拔检测：PHONE_DET -> HP_DET_H -> GPIO4_D3_d
  
• 录音：MIC_IN2P / MIC_IN2N
  
  

• 概述 / Overview
  
  
  
  
  • I2S/PCM controllers 的 features
    
    
  
  
• 框图 / Block Diagram
  
  

• master / slave
  
• i2s 的3种 mode
  
• pcm 的4种 mode
  
  

• 2.Features
  
• 4.Function Block and Mixer Path
  
  

• Audio Mixer Path
  
• Digital Mixer Path
  
  

• Digital I/O Pins
  
• Analog I/O Pins
  
  

   Digital Audio Interface.

   Provides audio data to the codec. Formats are usually AC97, I2S, PCM

   ALSA System on Chip.

   A Linux kernel subsystem created to provide better ALSA support for system-on-chip and portable audio codecs. It allows to reuse codec drivers across multiple architectures and provides an API to integrate them with the SoC audio interface.

• Platform drivers，提供了配置/使能 SoC audio interface (或称 CPU DAI) 的能力;
  
• Codec drivers，提供了配置/使能 Codec 的能力;
  
• Machine drivers，描述了应该如何控制 CPU DAI 和 Codec，使他们互相配合在一起工作;
  
  

• Documentation/devicetree/bindings/sound/simple-card.txt
  
• Documentation/devicetree/bindings/sound/widgets.txt
  
• Documentation/sound/alsa/soc/machine.txt
  
• sound/soc/generic/simple-card.c
  
  

• platform driver 是 i2s0;
  
• codec driver 是 rt5651;
  
  

• 在 Asoc 驱动中，用 Widget 来描述一个声卡的功能部件
  
• 参考文档：Documentation/sound/alsa/soc/dapm.txt
  
  

• Mic Jack，代表麦克风
  
• Headphone Jack，代表 3.5 mm 耳机座
  
  

   A list of the connections between audio components.

   Each entry is a pair of strings, the first being the connection's sink, the second being the connection's source.

• Documentation/devicetree/bindings/sound/rockchip-i2s.txt
  
• sound/soc/rockchip/rockchip_i2s.c
  
  

• sound/soc/codecs/rt5651.c
  
• Documentation/sound/alsa/soc/dapm.txt
  
  

答案对人有帮助，有参考价值 0

• 第1个参数是目的地;
  
• 第2个参数是会用到的 kcontrol，可以为 NULL;
  
• 第3个成员是来源;