linux-kernel - Re: [PATCH] ARM64: dts: meson: reduce odroid-c2 eMMC maximum rate

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Message-ID: <7hy3j3fjfo.fsf@baylibre.com>
Date:   Wed, 07 Mar 2018 17:24:43 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     Carlo Caione <carlo@...one.org>, ellierevves@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM64: dts: meson: reduce odroid-c2 eMMC maximum rate

Jerome Brunet <jbrunet@...libre.com> writes:

> Different modules maybe installed by the user on the eMMC connector
> of the odroid-c2. While the red modules are working without an issue,
> it seems some black modules (apparently Samsung based) are having
> issue at 200MHz
>
> While the tuning algorithm introduced in v4.14 enables high speed modes
> on every other tested designs, it seems a problem remains for this
> particular combination of board and eMMC module.
>
> Lowering the maximum frequency of the eMMC on this board until we can
> figure out a better solution.
>
> Fixes: d341ca88eead ("mmc: meson-gx: rework tuning function")
> Suggested-by: Ellie Reeves <ellierevves@...il.com>
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>

Applied to v4.17/dt64 and Cc'd to stable,

Kevin