linux-kernel - Re: [PATCH 3/3] mmc: tegra: prevent ACMD23 on Tegra 3

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Message-ID: <7096174.4n8ysn5QrL@dimapc>
Date:   Sat, 28 Jul 2018 13:13:42 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Peter Geis <pgwipeout@...il.com>
Cc:     Stefan Agner <stefan@...er.ch>,
        Adrian Hunter <adrian.hunter@...el.com>,
        ulf.hansson@...aro.org, thierry.reding@...il.com,
        jonathanh@...dia.com, marcel.ziswiler@...adex.com,
        linux-mmc@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-tegra-owner@...r.kernel.org
Subject: Re: [PATCH 3/3] mmc: tegra: prevent ACMD23 on Tegra 3

On Friday, 27 July 2018 23:19:53 MSK Peter Geis wrote:
> Kingston KE4CN3K6A.
> Though I am pretty sure I've figured out the instability.
> Brought it in to work and hooked it to a scope.
> Couldn't find clock, but cmd and all eight bits are running at 1.2 volts.
> Repeated the results with the bootloader, the original kernel, and my
> mainline.
> Also noticed that even on the slowest slew rate there is significant
> ringing and overshoot of .15 volts.

Okay, but eMMC is working fine with the original kernel, isn't it?