On Fri, Jan 13, 2023 at 3:04 AM Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> wrote: > From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > > ALSA SoC has many type of Generic Audio Card driver (Simple Audio Card, > Audio Graph Card, Audio Graph Card2), and Renesas/Kuninori Morimoto want > to test these. > > Generic Audio Card driver had been requested on ALSA SoC. > It has many type of device connection method, and historically, > requested connection support range of generic driver have been > upgraded. > > Upgrading connection support range itself was possible on generic > driver, but could not implemented, because we need to keep compatibility > on Device-Tree. This is one of the reason why we have many type of > Generic Audio Card driver. > > ULCB/KF is good board to test these. > Kuninori has been testing these Generic Audio Card driver by using his > local patch to switching drivers. But it is good idea to upstream these > from information sharing point of view, because DT setting is complex. > It can be good sample for user. This patch is one of them. > > From normal user point of view who don't need to test the driver, > it should keep as-is, nothing changed. > > This patch adds "Audio Graph Card2 + MIXer + TDM Split" DT setting file > for ULCB/KF. Because it reach to subdevice maximum, it ignore HDMI. > We can switch to use it if ulcb.dtsi / ulcb-kf.dtsi were updated. > > Because it needs "switching driver", not "add extra feature", > it doesn't use Device-Tree overlay. > > Link: https://lore.kernel.org/r/875yeepxfw.wl-kuninori.morimoto.gx@xxxxxxxxxxx > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> i.e. will queue in renesas-devel for v6.3. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
