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DPCM connection on Card2, its DT looks like below. Current Card2 is checking (a)/(b) part only for convert-xxx settings. But it is not useful. This patch enables its settings at (A)/(B) part too. (A)/(B) settings will be overwritten (a)/(b) settings if it has. <Image> (A) (a) Card2 <--+--> FE <---> CPU | +--> BE <---> Codec (B) (b) <DT> card2-sound { ... links = <fe, be>; /* (A) (B) */ }; dpcm { /* FE */ ports@0 { /* (A) */ fe: port { fe_ep: endpoint { remote-endpoint = <&cpu_ep>; } }; }; /* BE */ ports@1 { /* (B) */ be: port { convert-rate = <44100>; /* This patch enables this */ be_ep: endpoint { remote-endpoint = <&codec_ep>; } }; }; }; cpu { /* CPU (a) */ port { cpu_ep: endpoint { remote-endpoint = <&fe_ep>; } }; }; codec { /* Codec (b) */ port { convert-rate = <48000>; /* (B) settings will be over written here */ codec_ep: endpoint { remote-endpoint = <&be_ep>; } }; }; Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://lore.kernel.org/r/871qqn8fst.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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README |
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.