Hi Shengjiu, On 07/21/2025, Shengjiu Wang wrote: > On Fri, Jul 18, 2025 at 7:51 PM Alexander Stein > <alexander.st...@ew.tq-group.com> wrote:
[...] >> Am Freitag, 18. Juli 2025, 12:11:48 CEST schrieb Shengjiu Wang: [...] >>> + /* IEC60958 format */ >>> + val = 31 << FIELD_CTRL_P_SEL_SHIFT; >>> + val |= 30 << FIELD_CTRL_C_SEL_SHIFT; >>> + val |= 29 << FIELD_CTRL_U_SEL_SHIFT; >>> + val |= 28 << FIELD_CTRL_V_SEL_SHIFT; >>> + val |= 4 << FIELD_CTRL_D_SEL_SHIFT; >>> + val |= 0 << FIELD_CTRL_PRE_SEL_SHIFT; [...] >> But where do these numbers come from? I can see that downstream kernel >> sets these bits depending on audio config being passed. > > These numbers are defined in standard IEC958 spec. Can these be defined by macros, even in a certain common header file, include/sound/asoundef.h? -- Regards, Liu Ying
