El Wed, Aug 31, 2016 at 10:56:48AM -0300, Fabio Estevam deia:
> Commit 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
> changed many more clocks than only the SPDIF core clock as stated in
> the commit message.
>
> The MLB clock has been added and this causes SPDIF regression as
> reported by Xavi Drudis Ferran and also in this forum post:
> https://forum.digikey.com/thread/34240
>
> The MX6Q Reference Manual does not mention that MLB is a clock related
> to SPDIF, so change it back to a dummy clock to restore SPDIF
> functionality.
>
> Thanks to Ambika for providing the fix at:
> https://community.nxp.com/thread/387131
>
> Fixes: 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.4.x
> Reported-by: Xavi Drudis Ferran <xdrudis@xxxxxxxxx>
> Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxx>
> ---
> arch/arm/boot/dts/imx6qdl.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
> index b620ac8..b13b0b2 100644
> --- a/arch/arm/boot/dts/imx6qdl.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> @@ -243,7 +243,7 @@
> clocks = <&clks IMX6QDL_CLK_SPDIF_GCLK>, <&clks IMX6QDL_CLK_OSC>,
> <&clks IMX6QDL_CLK_SPDIF>, <&clks IMX6QDL_CLK_ASRC>,
> <&clks IMX6QDL_CLK_DUMMY>, <&clks IMX6QDL_CLK_ESAI_EXTAL>,
> - <&clks IMX6QDL_CLK_IPG>, <&clks IMX6QDL_CLK_MLB>,
> + <&clks IMX6QDL_CLK_IPG>, <&clks IMX6QDL_CLK_DUMMY>,
> <&clks IMX6QDL_CLK_DUMMY>, <&clks IMX6QDL_CLK_SPBA>;
> clock-names = "core", "rxtx0",
> "rxtx1", "rxtx2",
> --
> 1.9.1
>
Tested-by: Xavi Drudis Ferran <xdrudis@xxxxxxxxx>
(on linux-libre-4.7, wandboard-quad-rev-b1, imx6q MCIMX6Q5EYM10AC ,according to wandboard manual BOM)
Before the change I didn't hear output on spdif, after the change output sounds ok.
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