> -----Original Message-----
> From: Marcel Ziswiler <[email protected]>
> Sent: 2022??11??3?? 4:43
> To: [email protected]; [email protected];
> [email protected]
> Cc: dl-linux-imx <[email protected]>; [email protected];
> [email protected]; Bough Chen <[email protected]>;
> [email protected]; [email protected]; [email protected];
> [email protected]
> Subject: mmc: host: sdhci-esdhc-imx: async sdio interrupt and hardware
> auto-tuning
>
> Hi there
>
> When we investigated an SDIO Wi-Fi stability issue I discovered the following
> downstream-only commit in NXP's latest downstream BSP
> 5.15.52_2.1.0 [1]. The asynchronous SDIO interrupt seems to adversly affect the
> hardware auto-tuning. As a workaround what got implemented is an fsl-custom
> device tree property that limits the auto-tuning to
> 1 bit only (e.g. on DAT[0]) while the SDIO interrupt stays on DAT[1].
>
> Does anybody know any further details about this?
>
> Would this be a reasonable thing to also implement upstream?
Hi Marcel,
I send these patches to community few month ago, get some comments related to dts part.
I will continue to do the upstream work for these patches.
Best Regards
Haibo Chen
>
> Unfortunately, so far we have not really done any extensive SDIO validation
> using upstream but I plan to set something like that up so we may see whether
> or not we are also hitting such issue.
>
> Thanks!
>
> [1]
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.co
> m%2Fnxp-imx%2Flinux-imx%2Fcommit%2F84c529a1474a9f6614e475e178ca5fe
> 23b6177de&data=05%7C01%7Chaibo.chen%40nxp.com%7C5b75121c05a
> d48c362d708dabd12e507%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0
> %7C638030186093684545%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw
> MDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7
> C&sdata=PX17UiGkQHfMxHd9Sf2jEbIsZgWO5MCp5pF%2BIDXQIn4%3D&a
> mp;reserved=0
>
> Cheers
>
> Marcel