From: Leo Liang <ycliang@andestech.com>
To: <thomas.perrot@bootlin.com>
Cc: <u-boot@lists.denx.de>
Subject: Re: [PATCH] riscv: sifive: fu740: reduce DDR speed from 1866MT/s to 1600MT/s
Date: Tue, 12 Mar 2024 13:23:49 +0800 [thread overview]
Message-ID: <Ze_m5Zs1qmcSg_Zx@swlinux02> (raw)
In-Reply-To: <20240222145203.2659671-1-thomas.perrot@bootlin.com>
On Thu, Feb 22, 2024 at 03:52:03PM +0100, thomas.perrot@bootlin.com wrote:
> From: Thomas Perrot <thomas.perrot@bootlin.com>
>
> It appears that there is some timing marginality either in the
> board layout or the SoC that results in occasional data corruption
> on some boards.
> We observed this issue on some of the new HiFive Unmatched RevB
> boards during volume production as well as some of the original
> HiFive Unmatched boards from 2021 in our possession. This means
> that there are other boards out there that might have the issue
> too.
>
> We have done some limited testing with DDR4 at 1600MT/s and
> faulty boards (failing at 1866MT/s) passed.
> We plan further testing after we procure a temperature chamber.
>
> Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
> ---
> arch/riscv/dts/fu740-c000-u-boot.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
prev parent reply other threads:[~2024-03-12 5:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-22 14:52 [PATCH] riscv: sifive: fu740: reduce DDR speed from 1866MT/s to 1600MT/s thomas.perrot
2024-03-12 5:23 ` Leo Liang [this message]
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