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From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: linux-kernel@vger.kernel.org, Ulf Hansson <ulfh@kernel.org>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Avri Altman <avri.altman@sandisk.com>,
	Pedro Demarchi Gomes <pedrodemargomes@gmail.com>,
	Erick Shepherd <erick.shepherd@ni.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	"open list:MULTIMEDIA CARD (MMC),
	SECURE DIGITAL (SD) AND..." <linux-mmc@vger.kernel.org>
Subject: Re: [PATCH] mmc: core: Kioxia 016G01 does not enter boot mode after SLEEP
Date: Thu, 7 May 2026 07:03:24 +0200	[thread overview]
Message-ID: <afwdHLv4xLifaopS@pengutronix.de> (raw)
In-Reply-To: <737a7feb-6573-4c77-8102-08653b3ae9f4@broadcom.com>

Hi Florian,

On Wed, May 06, 2026 at 09:49:46AM -0700, Florian Fainelli wrote:
> On 4/13/26 11:05, Florian Fainelli wrote:
> > The Kioxia 016G01 eMMC device does not exit SLEEP mode when sending CMD0
> > which prevents the system from properly resuming from S3 warm boot where
> > the eMMC is necessary to pull in the boot components.
> > 
> > Add a quirk which prevents that specific device model from entering
> > SLEEP mode. There are no differences in the power consumption observed.
> > 
> > Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
> 
> Any feedback on this?

Hm, can the sleep call be executed before mmcblk driver is loaded?
For example by under-voltage signal? In this case the quirk will not
be applied. May be better to put this quirk in mmc_ext_csd_fixups[]?

Best Regards,
Oleksij
-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
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  reply	other threads:[~2026-05-07  5:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20260413180551.3683969-1-florian.fainelli@broadcom.com>
2026-05-06 16:49 ` [PATCH] mmc: core: Kioxia 016G01 does not enter boot mode after SLEEP Florian Fainelli
2026-05-07  5:03   ` Oleksij Rempel [this message]
2026-05-11 14:18 ` Ulf Hansson
2026-05-11 16:01   ` Florian Fainelli

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