linux-kernel - Re: [PATCH] mmc: sdhci-of-arasan: Increase CD stable timeout to 2 seconds

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Message-ID: <CAPDyKFrA7TiqX26BrSKaKeNyq8TRSoMpxvChuE1AhdVShvspGg@mail.gmail.com>
Date: Wed, 17 Dec 2025 14:45:11 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
Cc: Adrian Hunter <adrian.hunter@...el.com>, Michal Simek <michal.simek@....com>, 
	linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, git@....com, saikrishna12468@...il.com
Subject: Re: [PATCH] mmc: sdhci-of-arasan: Increase CD stable timeout to 2 seconds

On Fri, 12 Dec 2025 at 07:36, Sai Krishna Potthuri
<sai.krishna.potthuri@....com> wrote:
>
> On Xilinx/AMD platforms, the CD stable bit take slightly longer than
> one second(about an additional 100ms) to assert after a host
> controller reset. Although no functional failure observed with the
> existing one second delay but to ensure reliable initialization, increase
> the CD stable timeout to 2 seconds.
>
> Fixes: e251709aaddb ("mmc: sdhci-of-arasan: Ensure CD logic stabilization before power-up")
> Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>

Applied for fixes and by adding a stable-tag, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/sdhci-of-arasan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index b97d042897ad..ab7f0ffe7b4f 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -99,7 +99,7 @@
>  #define HIWORD_UPDATE(val, mask, shift) \
>                 ((val) << (shift) | (mask) << ((shift) + 16))
>
> -#define CD_STABLE_TIMEOUT_US           1000000
> +#define CD_STABLE_TIMEOUT_US           2000000
>  #define CD_STABLE_MAX_SLEEP_US         10
>
>  /**
> --
> 2.25.1
>