From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jerome Brunet <jbrunet@baylibre.com>
Subject: Re: [PATCH/RFT] mmc: meson-gx: include tx phase in the tuning
 process
Date: Wed, 27 Sep 2017 18:24:20 +0200
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To: Heiner Kallweit <hkallweit1@gmail.com>, Ulf Hansson <ulf.hansson@linaro.org>, Kevin Hilman <khilman@baylibre.com>
Cc: Carlo Caione <carlo@caione.org>, linux-mmc@vger.kernel.org, linux-amlogic@lists.infradead.org

On Tue, 2017-09-19 at 20:54 +0200, Heiner Kallweit wrote:
> > > Unfortunately this still doesn't fix the issue here.
> > > Tuning rx and tx clk sequentially assumes both are independent, what they
> > > IMHO are not. So meybe we have to check all combinations of rx/tx clk
> > > phase.
> > 
> > Interesting, I would be curious to know what tuning value you ended with,
> > compared to the "hard-coded' working value you have set.
> > 
> > You can get that fairly easily now, using CCF in debugfs, in
> > <debugfs>/clk/clk_summary, the different phase are reported
> > 
> 
> This gives me:
> 
> core phase: 180
> rx phase: 0
> tx phase: 270
> 
> And I end up with a corrupted root file system.

You should have had tuning on both the Rx and Tx phase and yet, you end up with
the default values ... that's strange

I should be able to get my hands on 16GB emmc module for this platform soon.
Let's see ...