From: Ritesh Harjani <riteshh@codeaurora.org>
To: ulf.hansson@linaro.org, linux-mmc@vger.kernel.org,
adrian.hunter@intel.com
Cc: shawn.lin@rock-chips.com, devicetree@vger.kernel.org,
andy.gross@linaro.org, linux-arm-msm@vger.kernel.org,
georgi.djakov@linaro.org, alex.lemberg@sandisk.com,
mateusz.nowak@intel.com, Yuliy.Izrailov@sandisk.com,
asutoshd@codeaurora.org, david.griego@linaro.org,
stummala@codeaurora.org, venkatg@codeaurora.org,
pramod.gurav@linaro.org, jeremymc@redhat.com,
linux-kernel@vger.kernel.org,
Ritesh Harjani <riteshh@codeaurora.org>
Subject: [RFC PATCH 0/4] mmc: core: Provide CMD5 awake and partial_init support
Date: Mon, 20 Feb 2017 13:33:08 +0530 [thread overview]
Message-ID: <1487577792-12510-1-git-send-email-riteshh@codeaurora.org> (raw)
As per JEDEC spec - CMD5 can be used to awake from sleep mode for emmc.
This patch series provide CMD5(awake) + mmc_partial_init support to resume
mmc card device. This is mainly to reduce the resume time.
This was tested on db410c (emmc with HS200 mode) and MS8996 (emmc with HS400ES)
based internal board. This patch reduced the resume time by ~50% on msm8996
and ~11% on db410c.
As of now this patch series provides a caps (MMC_CAP2_SLEEP_AWAKE) to enable this feature.
Since there is no dependency on host platform for this, we can enable this feature by
default as well. Thoughts?
Ritesh Harjani (4):
Documentation: mmc: add mmc-sleep-awake
mmc: core: add mmc-sleep-awake caps
mmc: mmc: add support for CMD5 awake
mmc: core: Implement mmc_partial_init during resume
Documentation/devicetree/bindings/mmc/mmc.txt | 2 +
drivers/mmc/core/core.c | 13 +++
drivers/mmc/core/core.h | 1 +
drivers/mmc/core/host.c | 2 +
drivers/mmc/core/mmc.c | 160 ++++++++++++++++++++++++--
include/linux/mmc/card.h | 3 +
include/linux/mmc/host.h | 2 +
7 files changed, 176 insertions(+), 7 deletions(-)
--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.
next reply other threads:[~2017-02-20 8:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-20 8:03 Ritesh Harjani [this message]
2017-02-20 8:03 ` [RFC PATCH 1/4] Documentation: mmc: add mmc-sleep-awake Ritesh Harjani
2017-02-27 19:04 ` Rob Herring
2017-02-20 8:03 ` [RFC PATCH 2/4] mmc: core: add mmc-sleep-awake caps Ritesh Harjani
2017-02-20 8:03 ` [RFC PATCH 3/4] mmc: mmc: add support for CMD5 awake Ritesh Harjani
2017-02-20 8:03 ` [RFC PATCH 4/4] mmc: core: Implement mmc_partial_init during resume Ritesh Harjani
2017-02-21 7:40 ` Adrian Hunter
[not found] ` <1487577792-12510-5-git-send-email-riteshh-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-02-21 10:51 ` Ulf Hansson
2017-02-21 10:51 ` Ulf Hansson
2017-02-20 11:39 ` [RFC PATCH 0/4] mmc: core: Provide CMD5 awake and partial_init support Ulf Hansson
2017-02-20 13:04 ` Ritesh Harjani
2017-02-22 0:55 ` Shawn Lin
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