From: Changhuang Liang <changhuang.liang@starfivetech.com>
To: Asutosh Das <quic_asutoshd@quicinc.com>,
Ritesh Harjani <ritesh.list@gmail.com>,
Ulf Hansson <ulfh@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
Changhuang Liang <changhuang.liang@starfivetech.com>
Subject: [PATCH v1 0/2] Improve eMMC performance for the StarFive JHB100 SoC
Date: Wed, 14 Oct 2026 05:12:20 -0700 [thread overview]
Message-ID: <20261014121222.31385-1-changhuang.liang@starfivetech.com> (raw)
This series implements a generic interface to configure CIT based on
time (ns). Different platforms can improve MMC performance by
configuring their respective CIT. This series has been tested on the
JHB100 SoC.
before:
dd if=/dev/mmcblk0 of=/dev/null bs=1M count=800
838860800 bytes (839 MB, 800 MiB) copied, 9.38511 s, 89.4 MB/s
dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=800
838860800 bytes (839 MB, 800 MiB) copied, 12.2127 s, 68.7 MB/s
after:
dd if=/dev/mmcblk0 of=/dev/null bs=1M count=800
838860800 bytes (839 MB, 800 MiB) copied, 3.19472 s, 263 MB/s
dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=800
838860800 bytes (839 MB, 800 MiB) copied, 10.7587 s, 78.0 MB/s
This series depends on series:
https://lore.kernel.org/all/20260930103258.13375-1-changhuang.liang@starfivetech.com/
Changhuang Liang (2):
mmc: cqhci: Add support for setting command idle time in nanoseconds
mmc: sdhci-of-dwcmshc: Set CQHCI command idle time for StarFive JHB100
drivers/mmc/host/cqhci-core.c | 60 +++++++++++++++++++++++++++++
drivers/mmc/host/cqhci.h | 6 +++
drivers/mmc/host/sdhci-of-dwcmshc.c | 22 +++++++++++
3 files changed, 88 insertions(+)
--
2.25.1
next reply other threads:[~2026-10-14 12:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-14 12:12 Changhuang Liang [this message]
2026-10-14 12:12 ` [PATCH v1 1/2] mmc: cqhci: Add support for setting command idle time in nanoseconds Changhuang Liang
2026-10-14 12:12 ` [PATCH v1 2/2] mmc: sdhci-of-dwcmshc: Set CQHCI command idle time for StarFive JHB100 Changhuang Liang
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