linux-kernel - Re: [PATCH v7 00/11] Introduce features and debugfs/sysfs entries for MHI

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Date:   Tue, 11 Aug 2020 10:53:15 -0700
From:   bbhatt@...eaurora.org
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        linux-kernel-owner@...r.kernel.org
Subject: Re: [PATCH v7 00/11] Introduce features and debugfs/sysfs entries for
 MHI

On 2020-08-10 23:26, Manivannan Sadhasivam wrote:
> Hi Bhaumik,
> 
> On Mon, Aug 10, 2020 at 03:00:54PM -0700, Bhaumik Bhatt wrote:
>> Save hardware information from BHI.
>> Allow reading and modifying some MHI variables for debug, test, and
>> informational purposes using debugfs.
>> Read values for device specific hardware information to be used by 
>> OEMs in
>> factory testing such as serial number and PK hash using sysfs.
>> 
>> This set of patches was tested on arm64 and x86.
>> 
> 
> Sorry for stretching the review so long. Will apply the series to 
> mhi-next
> once v5.9-rc1 is out.
> 
> Thanks,
> Mani
> 
Awesome. Thank you for the thorough review.
>> v7:
>> -Added suggested-by and reviewed-by tags
>> -Fixed nitpick on removal of M3_fast counter as it was unused
>> -Updated sysfs documentation dates and intended kernel version
>> -Fixed minor debugfs formatting by removing an extra newline character
>> 
>> v6:
>> -Introduced APIs for allocating and freeing the MHI controller so as 
>> to ensure
>> that it is always zero-initialized
>> -Moved gerrits around for counter introduction
>> -Fixed documentation for sysfs
>> 
>> v5:
>> -Removed the debug entry to trigger reset and will be addressed in a 
>> seperate
>> patch
>> -Added patch bus: mhi: core: Use counters to track MHI device state 
>> transitions
>> -Updated helper API to trigger a non-blocking host resume
>> -Minor nitpicks also fixed
>> 
>> v4:
>> -Removed bus: mhi: core: Introduce independent voting mechanism patch
>> -Removed bus vote function from debugfs due to independent voting 
>> removal
>> -Added helper resume APIs to aid consolidation of spread out code
>> -Added a clean-up patch and a missing host resume in voting API
>> 
>> v3:
>> -Add patch to check for pending packets in suspend as a dependency for 
>> the
>> independent voting mechanism introduction
>> -Include register dump entry for debugfs to dump MHI, BHI, and BHIe 
>> registers
>> -Update commit message for the debugfs patch
>> -Updated Documentation/ABI with the required info for sysfs
>> -Updated debugfs patch to include a new KConfig entry and dependencies
>> -Updated reviewed-by for some patches
>> 
>> v2:
>> -Added a new debugfs.c file for specific debugfs entries and code
>> -Updated commit text and addressed some comments for voting change
>> -Made sure sysfs is only used for serial number and OEM PK hash usage
>> 
>> Bhaumik Bhatt (11):
>>   bus: mhi: core: Remove double occurrence for mhi_ctrl_ev_task()
>>     declaration
>>   bus: mhi: core: Abort suspends due to outgoing pending packets
>>   bus: mhi: core: Use helper API to trigger a non-blocking host resume
>>   bus: mhi: core: Trigger host resume if suspended during
>>     mhi_device_get()
>>   bus: mhi: core: Use generic name field for an MHI device
>>   bus: mhi: core: Introduce helper function to check device state
>>   bus: mhi: core: Introduce counters to track MHI device state
>>     transitions
>>   bus: mhi: core: Introduce debugfs entries for MHI
>>   bus: mhi: core: Read and save device hardware information from BHI
>>   bus: mhi: core: Introduce APIs to allocate and free the MHI 
>> controller
>>   bus: mhi: core: Introduce sysfs entries for MHI
>> 
>>  Documentation/ABI/stable/sysfs-bus-mhi |  21 ++
>>  MAINTAINERS                            |   1 +
>>  drivers/bus/mhi/Kconfig                |   8 +
>>  drivers/bus/mhi/core/Makefile          |   5 +-
>>  drivers/bus/mhi/core/boot.c            |  17 +-
>>  drivers/bus/mhi/core/debugfs.c         | 409 
>> +++++++++++++++++++++++++++++++++
>>  drivers/bus/mhi/core/init.c            |  81 ++++++-
>>  drivers/bus/mhi/core/internal.h        |  37 ++-
>>  drivers/bus/mhi/core/main.c            |  27 +--
>>  drivers/bus/mhi/core/pm.c              |  26 ++-
>>  include/linux/mhi.h                    |  30 ++-
>>  11 files changed, 623 insertions(+), 39 deletions(-)
>>  create mode 100644 Documentation/ABI/stable/sysfs-bus-mhi
>>  create mode 100644 drivers/bus/mhi/core/debugfs.c
>> 
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
>> Forum,
>> a Linux Foundation Collaborative Project
>>