linux-kernel - Re: [RFC PATCH V2 2/2] mmc: allow card to disable tuning

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Message-ID: <20250218184156.574787-1-erick.shepherd@ni.com>
Date: Tue, 18 Feb 2025 12:41:56 -0600
From: Erick Shepherd <erick.shepherd@...com>
To: <adrian.hunter@...el.com>
CC: <andy-ld.lu@...iatek.com>, <avri.altman@....com>, <cw9316.lee@...sung.com>,
        <dsimic@...jaro.org>, <erick.shepherd@...com>, <keita.aihara@...y.com>,
        <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <quic_jjohnson@...cinc.com>, <ricardo@...liere.net>,
        <ulf.hansson@...aro.org>, <victor.shih@...esyslogic.com.tw>,
        <wsa+renesas@...g-engineering.com>
Subject: Re: [RFC PATCH V2 2/2] mmc: allow card to disable tuning

Sorry about that, the context for this change is that I have been
working with a DDR50 swissbit SD card that does not support tuning.
The case I'm seeing is that the first tuning times out and any
further tuning attempts cause an async page read I/O error. I used
this change to prevent the card from attempting to tune again if it
is ever reset in the case where we know tuning isn't supported.

Regards
Erick