From: Bhaumik Bhatt <bbhatt@codeaurora.org>
To: manivannan.sadhasivam@linaro.org, hemantk@codeaurora.org
Cc: linux-arm-msm@vger.kernel.org, loic.poulain@linaro.org,
jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v3 0/7] Updates to MHI channel handling
Date: Wed, 2 Dec 2020 15:40:31 -0800 [thread overview]
Message-ID: <1606952438-15321-1-git-send-email-bbhatt@codeaurora.org> (raw)
MHI specification shows a state machine with support for STOP channel command
and the validity of certain state transitions. MHI host currently does not
provide any mechanism to stop a channel and restart it without resetting it.
There are also times when the device moves on to a different execution
environment while client drivers on the host are unaware of it and still
attempt to reset the channels facing unnecessary timeouts.
This series addresses the above areas to provide support for stopping an MHI
channel, resuming it back, improved documentation and improving upon channel
state machine handling in general.
This set of patches was tested on arm64 architecture.
v3:
-Updated documentation for channel transfer APIs to highlight differences
-Create separate patch for "allowing channel to be disabled from stopped state"
v2:
-Renamed the newly introduced APIs to mhi_start_transfer() / mhi_stop_transfer()
-Added improved documentation to avoid confusion with the new APIs
-Removed the __ prefix from mhi_unprepare_channel() API for consistency.
Bhaumik Bhatt (7):
bus: mhi: core: Allow receiving a STOP channel command response
bus: mhi: core: Allow channel to be disabled from stopped state
bus: mhi: core: Improvements to the channel handling state machine
bus: mhi: core: Add support to stop or start channel data transfers
bus: mhi: core: Check execution environment for channel before issuing
reset
bus: mhi: core: Remove __ prefix for MHI channel unprepare function
bus: mhi: Improve documentation on channel transfer setup APIs
drivers/bus/mhi/core/init.c | 9 +-
drivers/bus/mhi/core/internal.h | 12 +++
drivers/bus/mhi/core/main.c | 229 +++++++++++++++++++++++++++-------------
include/linux/mhi.h | 45 +++++++-
4 files changed, 220 insertions(+), 75 deletions(-)
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next reply other threads:[~2020-12-02 23:42 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-02 23:40 Bhaumik Bhatt [this message]
2020-12-02 23:40 ` [PATCH v3 1/7] bus: mhi: core: Allow receiving a STOP channel command response Bhaumik Bhatt
2020-12-03 0:15 ` Hemant Kumar
2020-12-04 1:43 ` Bhaumik Bhatt
2020-12-02 23:40 ` [PATCH v3 2/7] bus: mhi: core: Allow channel to be disabled from stopped state Bhaumik Bhatt
2020-12-03 0:17 ` Hemant Kumar
2020-12-02 23:40 ` [PATCH v3 3/7] bus: mhi: core: Improvements to the channel handling state machine Bhaumik Bhatt
2020-12-03 0:51 ` Hemant Kumar
2020-12-02 23:40 ` [PATCH v3 4/7] bus: mhi: core: Add support to stop or start channel data transfers Bhaumik Bhatt
2020-12-03 0:33 ` Hemant Kumar
2020-12-04 1:44 ` Bhaumik Bhatt
2020-12-02 23:40 ` [PATCH v3 5/7] bus: mhi: core: Check execution environment for channel before issuing reset Bhaumik Bhatt
2020-12-03 0:54 ` Hemant Kumar
2020-12-02 23:40 ` [PATCH v3 6/7] bus: mhi: core: Remove __ prefix for MHI channel unprepare function Bhaumik Bhatt
2020-12-02 23:48 ` Hemant Kumar
2020-12-02 23:40 ` [PATCH v3 7/7] bus: mhi: Improve documentation on channel transfer setup APIs Bhaumik Bhatt
2020-12-03 0:56 ` Hemant Kumar
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