Re: [meta-freescale] linux-fsl 5.10 kernels don't appear to have multi-lane in sound/soc/fsl/fsl_sai.c

Hi Brian,

On Tue, Oct 26, 2021 at 11:10 AM Brian Hutchinson <[email protected]> wrote:
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> On Tue, Oct 26, 2021 at 10:07 AM Brian Hutchinson via lists.yoctoproject.org <[email protected]> wrote:
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>> Hi,
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>> First, forgive me for posting a link in an post with no context ... I hit a wrong button and accidentally sent before ready.
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>> Bottom line up front.  How can I get a 5.10 kernel with multi-lane support for IMX8MM?
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>> We use linux-fsl 5.4 on a IMXMM based board and have recently stepped up to linux-fsl 5.10 and the sound/fsl/fsl_sai.c has no support for "multi-lane" anymore which breaks our code.
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>> I figure this is simply a case where things in linux-imx are new and just not picked up in linux-fslc yet but wondering if it's possible to get multi-lane support in a 5.10 kernel for the IMX8MM.
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>> I still don't quite fully understand how all the releases work, the linux-imx releases appear to be for newer boards and don't necessarily support the older boards from what I'm seeing.
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>> Thanks for any advice/guidance.
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>> Regards,
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>> Brian
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> And that link I accidentally posted by itself https://source.codeaurora.org/external/imx/linux-imx/tree/sound/soc/fsl/fsl_sai.c?h=lf-5.10.y
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> ... is the reference I mentioned where I see multi-lane support in linux-imx 5.10.

With the mainline SAI driver, it is possible to use several channels.
Not sure what you mean by "multi-lane" in your use-case.

Please check:
https://bootlin.com/blog/eight-channels-audio-on-i-mx7-with-pcm3168/