From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Avri Altman <Avri.Altman@sandisk.com>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
"linux-renesas-soc@vger.kernel.org"
<linux-renesas-soc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/5] mmc: core: Add support for graceful host removal for eMMC
Date: Mon, 31 Mar 2025 10:27:53 +0200 [thread overview]
Message-ID: <Z-pSCVf9OJfCzKbS@shikoro> (raw)
In-Reply-To: <CAPDyKFreJu8jZXoBJ2J1Mgj+OOAJX5rjzX0D4ZfbTj_uVrPKPw@mail.gmail.com>
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> > > + _mmc_suspend(host, MMC_POWEROFF_UNBIND);
> > Couldn't find how _mmc_suspend handles this new power off flag?
>
> Right. You need to look closer at mmc_may_poweroff_notify() as it
> should return false if MMC_POWEROFF_UNBIND, unless
> MMC_CAP2_FULL_PWR_CYCLE.
And this is what we need for Renesas SDHI which only has
MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND. What this means is:
For suspend, we have some blackbox firmware (PSCI) handling the power
cycle. But for unbind, we cannot trigger the firmware, so we can't use
the notification but need mmc_sleep().
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next prev parent reply other threads:[~2025-03-31 8:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-20 14:00 [PATCH 0/5] mmc: core: Add support for graceful host removal for eMMC/SD Ulf Hansson
2025-03-20 14:00 ` [PATCH 1/5] mmc: core: Convert mmc_can_poweroff_notify() into a bool Ulf Hansson
2025-03-28 13:39 ` Avri Altman
2025-03-31 8:14 ` Wolfram Sang
2025-03-20 14:00 ` [PATCH 2/5] mmc: core: Further avoid re-storing power to the eMMC before a shutdown Ulf Hansson
2025-03-28 13:55 ` Avri Altman
2025-03-31 8:21 ` Wolfram Sang
2025-03-31 9:13 ` Ulf Hansson
2025-03-31 10:46 ` Wolfram Sang
2025-03-31 12:06 ` Ulf Hansson
2025-04-01 6:51 ` Wolfram Sang
2025-04-01 11:50 ` Ulf Hansson
2025-03-20 14:00 ` [PATCH 3/5] mmc: core: Convert into an enum for the poweroff-type for eMMC Ulf Hansson
2025-03-31 8:22 ` Wolfram Sang
2025-03-20 14:00 ` [PATCH 4/5] mmc: core: Add support for graceful host removal " Ulf Hansson
2025-03-28 8:13 ` Avri Altman
2025-03-28 10:21 ` Ulf Hansson
2025-03-31 8:27 ` Wolfram Sang [this message]
2025-03-31 8:23 ` Wolfram Sang
2025-03-20 14:00 ` [PATCH 5/5] mmc: core: Add support for graceful host removal for SD Ulf Hansson
2025-03-31 8:30 ` Wolfram Sang
2025-04-01 8:50 ` Wolfram Sang
2025-04-01 8:51 ` Wolfram Sang
2025-04-01 11:51 ` Ulf Hansson
2025-03-20 15:50 ` [PATCH 0/5] mmc: core: Add support for graceful host removal for eMMC/SD Wolfram Sang
2025-03-31 8:32 ` Wolfram Sang
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