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Audio in embedded Linux systems - Bootlin
https://bootlin.com/doc/legacy/audio/embedded_linux_audio.pdf
Kernel, drivers and embedded Linux development, consulting, training and support. http//freeelectrons.com Contents (1) Introduction Glossary Audio codecs and file formats System perspective System overview Advanced Linux Sound Architecture (ALSA) ALSA kernel drivers Kernel low latency requirements ALSA userspace interface
Porting custom audio codec in Linux BSP - Bits & Qubits
http://gopinaths.gitlab.io/post/audio_codec_in_linux/
To achieve all this, ASoC basically splits an embedded audio system into 3 components: Codec driver: The codec driver is platform independent and contains audio controls, audio interface capabilities, codec dapm definition and codec IO functions. Example audio codec : wm8750, wm8960, sgtl5000 etc.
ASoC: Supporting Audio on an Embedded Board
https://elinux.org/images/a/a7/Belloni-alsa-asoc-2020.pdf
- Kernel, drivers and embedded Linux - Development, consulting, training and support - https://bootlin.com 27/38. simple-card - routing Routing audio from the codec to the board connector is then done using simple-audio-card,routing simple-audio-card,routing = "AIN0", "Line0",
c - How to add a new audio codec driver to linux - Stack ...
https://stackoverflow.com/questions/32394983/how-to-add-a-new-audio-codec-driver-to-linux
I'm using embedded Linux for this board. UDOO company has released the sources of their linux kernel, so I can edit them. Now, we want to design our custom board similar to UDOO board. We noticed that the audio codec of UDOO board is no longer manufactured, so we want to replace it with another one, for example "wm8960" codec.
ASoC: Supporting Audio on an Embedded Board
https://elinux.org/images/b/b5/Belloni-alsa-asoc.pdf
codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); if (!codec_np) {dev_err(&pdev->dev, "failed to get codec info\n"); ret = -EINVAL; return ret;} dailink->codec_of_node = codec_np; free electrons- Embedded Linux, kernel, drivers - Development, consulting, training and support. http://free-electrons.com 12/38
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