Hello, On 3/25/22 10:18 AM, Daft Soft wrote: > Hi! > Is FEX-file applicable on 5.x kernel?
No, mainline Linux describes the audio routing in the device tree, not via FEX. > On Monday, 7 March 2022 at 13:25:27 UTC+3 mullappil...@gmail.com wrote: > > i have a board with A20 and PAM8620 audio amplifier. 3.4 kernel works > with > good audio along with patches on sunxi-codec.c, now moved to kernel 5.16, > and audio is not working. > the fex file has following entry > > [audio_para] > audio_used = 1 > audio_pa_ctrl = port:PH15<1><default><default><0> > audio_mute_ctrl = port:PH25<1><default><default><0> > > any help is appreciated Normally, external amplifiers use the "simple-audio-amplifier" binding here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/sound/simple-audio-amplifier.yaml The amplifier node is an "auxiliary device" referenced from the sound card via an "aux-devs" property, and the amplifier DAPM widgets (INL, INR, OUTL, OUTR) are added to the "allwinner,audio-routing" property. This setup with an external amplifier is common on A64 boards, for example: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi?h=v5.17#n436 The problem with the A20 codec is that the mainline driver does not currently support an "aux-devs" property. You would need to add a call from sun4i_codec_create_card() to something like: snd_soc_of_parse_aux_devs(card, "allwinner,aux-devs"); Then you could use the binding I described above. Regards, Samuel -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/0acdc596-e381-5fd2-0bd2-b0aa7990ddc6%40sholland.org.
