From: Avri Altman <avri.altman@wdc.com>
To: Ulf Hansson <ulf.hansson@linaro.org>, linux-mmc@vger.kernel.org
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Jaehoon Chung <jh80.chung@samsung.com>,
Shawn Lin <shawn.lin@rock-chips.com>,
Avi Shchislowski <avi.shchislowski@wdc.com>,
Alex Lemberg <alex.lemberg@wdc.com>,
linux-kernel@vger.kernel.org, Avri Altman <avri.altman@wdc.com>
Subject: [PATCH 0/3] mmc: core: Add SD Discard support
Date: Sun, 3 Feb 2019 10:50:25 +0200 [thread overview]
Message-ID: <1549183828-17316-1-git-send-email-avri.altman@wdc.com> (raw)
D spec v5.1 adds discard support. The flows and commands matches those
in eMMC, Which leaves to set the appropriate discard arg in CMD38 if
DISCARD_SUPPORT (b313) is set in the SD_STATUS register.
We set this arg on card init: not in mmc_init_erase as one might expect
but arbitrarily once the card indicated its discard support. This is
because unlike erase, it doesn't really involve any logic, and we want
to avoid the unnecessary complication.
Avri Altman (3):
mmc: core: Calculate the discard arg only once
mmc: core: Indicate SD specs higher than 4.0
mmc: core: Add discard support to sd
drivers/mmc/core/block.c | 12 +++---------
drivers/mmc/core/core.c | 6 +++++-
drivers/mmc/core/mmc.c | 8 ++++++++
drivers/mmc/core/sd.c | 15 +++++++++++++++
include/linux/mmc/card.h | 4 ++++
include/linux/mmc/sd.h | 6 ++++++
6 files changed, 41 insertions(+), 10 deletions(-)
--
1.9.1
next reply other threads:[~2019-02-03 8:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-03 8:50 Avri Altman [this message]
2019-02-03 8:50 ` [PATCH 1/3] mmc: core: Calculate the discard arg only once Avri Altman
2019-02-05 13:33 ` Ulf Hansson
2019-02-05 14:06 ` Avri Altman
2019-02-03 8:50 ` [PATCH 2/3] mmc: core: Indicate SD specs higher than 4.0 Avri Altman
2019-02-03 8:50 ` [PATCH 3/3] mmc: core: Add discard support to sd Avri Altman
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