linux-kernel - Re: [PATCH V5 00/11] coresight: Move remaining AMBA ACPI devices into platform driver

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Message-ID: <828d2109-7413-ffe5-da6a-56f15ed2f562@arm.com>
Date: Mon, 11 Mar 2024 09:25:02 +0000
From: James Clark <james.clark@....com>
To: Anshuman Khandual <anshuman.khandual@....com>,
 Suzuki K Poulose <suzuki.poulose@....com>
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Sudeep Holla <sudeep.holla@....com>, Mike Leach <mike.leach@...aro.org>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>, linux-acpi@...r.kernel.org,
 linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH V5 00/11] coresight: Move remaining AMBA ACPI devices into
 platform driver



On 11/03/2024 06:04, Anshuman Khandual wrote:
> 
> 
> On 3/5/24 23:55, Suzuki K Poulose wrote:
>> On 22/02/2024 08:21, Anshuman Khandual wrote:
>>> This moves remaining AMBA ACPI devices into respective platform drivers for
>>> enabling ACPI based power management support. This series applies on kernel
>>> v6.8-rc5 release. This series has been built, and boot tested on a DT based
>>> (RB5) and ACPI supported coresight platform (N1SDP).
>>
>> Please rebase your series on coresight next and fix build failures with the extra warnings turned ON (should be on by default with next).
> 
> I did rebase the series (which required some rebase related changes for some) on
> coresight next i.e with the following commit as HEAD.
> 
> a4f3057d19ff ("coresight-tpda: Change qcom,dsb-element-size to qcom,dsb-elem-bits")
> 
> Although did not see any warning either with = m or = y based coresight options.
> Is there any other particular config which needs to be enabled for these warnings
> to come up ?
> 

It doesn't apply cleanly on a4f305 for me, maybe you sent an old version
after rebasing?

This change in patch 5 is a warning for example, because not all members
of the struct are initialised. No special config is required:

+	{"ARMHC98D", 0}, /* ARM CoreSight Dynamic Replicator */"


>>
>>
>> Suzuki
>>
>>>
>>> https://git.gitlab.arm.com/linux-arm/linux-anshuman.git (amba_other_acpi_migration_v5)
>>>
>>> Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>
>>> Cc: Sudeep Holla <sudeep.holla@....com>
>>> Cc: Suzuki K Poulose <suzuki.poulose@....com>
>>> Cc: Mike Leach <mike.leach@...aro.org>
>>> Cc: James Clark <james.clark@....com>
>>> Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
>>> Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>
>>> Cc: linux-acpi@...r.kernel.org
>>> Cc: linux-arm-kernel@...ts.infradead.org
>>> Cc: linux-kernel@...r.kernel.org
>>> Cc: coresight@...ts.linaro.org
>>> Cc: linux-stm32@...md-mailman.stormreply.com
>>>
>>> Changes in V5:
>>>
>>> - Used table->mask to filter out bits from pid in coresight_get_uci_data_from_amba()
>>> - Dropped custom masks such as STM_AMBA_MASK and TMC_AMBA_MASK
>>> - Modified tmc_etr_setup_caps() to accept struct csdev_access argument
>>> - Reverted back tmc_etr_setup_caps() call site position in tmc_probe()
>>> - Changed replicator and funnel devices to use the new helpers earlier in series
>>> - Updated the commit messages regarding xxx_probe() refactoring and renaming
>>>
>>> Changes in V4:
>>>
>>> https://lore.kernel.org/all/20240123054608.1790189-1-anshuman.khandual@arm.com/
>>>
>>> - Fixed PM imbalance in etm4_probe() error path with pm_runtime_disable()
>>> - Restored back the pm_runtime_disable() on platform probe error paths
>>>    in replicator, funnel, catu, tpiu, tmc and stm devices
>>> - Dropped dev_caps argument from __tmc_probe()
>>> - Changed xxxx_platform_remove() for platform_driver->remove_new() callback
>>>
>>> Changes in V3:
>>>
>>> https://lore.kernel.org/all/20231208053939.42901-1-anshuman.khandual@arm.com/
>>>
>>> - Split coresight_init_driver/remove_driver() helpers into a separate patch
>>> - Added 'drvdata->pclk' comments in replicator, funnel, tpiu, tmc, and stm devices
>>> - Updated funnel, and replicator drivers to use these new helpers
>>> - Check for drvdata instead of drvdata->pclk in suspend and resume paths in catu,
>>>    tmc and debug devices
>>> - Added patch to extract device name from AMBA pid based table lookup for stm
>>> - Added patch to extract device properties from AMBA pid based table look for tmc
>>> - Dropped pm_runtime_put() from common __probe() functions
>>> - Handled pm_runtime_put() in AMBA driver in success path
>>> - Handled pm_runtime_put() in platform driver in both success and error paths
>>>
>>> Changes in V2:
>>>
>>> https://lore.kernel.org/all/20231201062053.1268492-1-anshuman.khandual@arm.com/
>>>
>>> - Dropped redundant devm_ioremap_resource() hunk from tmc_platform_probe()
>>> - Defined coresight_[init|remove]_driver() for both AMBA/platform drivers
>>> - Changed catu, tmc, tpiu, stm and debug coresight drivers to use the new
>>>    helpers avoiding build issues arising from module_amba_driver(), and
>>>    module_platform_driver() being on the same file
>>>
>>> Changes in V1:
>>>
>>> https://lore.kernel.org/all/20231027072943.3418997-1-anshuman.khandual@arm.com/
>>>
>>> - Replaced all IS_ERR() instances with IS_ERR_OR_NULL() as per Suzuki
>>>
>>> Changes in RFC:
>>>
>>> https://lore.kernel.org/all/20230921042040.1334641-1-anshuman.khandual@arm.com/
>>>
>>> Anshuman Khandual (11):
>>>    coresight: etm4x: Fix unbalanced pm_runtime_enable()
>>>    coresight: stm: Extract device name from AMBA pid based table lookup
>>>    coresight: tmc: Extract device properties from AMBA pid based table lookup
>>>    coresight: Add helpers registering/removing both AMBA and platform drivers
>>>    coresight: replicator: Move ACPI support from AMBA driver to platform driver
>>>    coresight: funnel: Move ACPI support from AMBA driver to platform driver
>>>    coresight: catu: Move ACPI support from AMBA driver to platform driver
>>>    coresight: tpiu: Move ACPI support from AMBA driver to platform driver
>>>    coresight: tmc: Move ACPI support from AMBA driver to platform driver
>>>    coresight: stm: Move ACPI support from AMBA driver to platform driver
>>>    coresight: debug: Move ACPI support from AMBA driver to platform driver
>>>
>>>   drivers/acpi/arm64/amba.c                     |   8 -
>>>   drivers/hwtracing/coresight/coresight-catu.c  | 142 +++++++++++++---
>>>   drivers/hwtracing/coresight/coresight-catu.h  |   1 +
>>>   drivers/hwtracing/coresight/coresight-core.c  |  29 ++++
>>>   .../hwtracing/coresight/coresight-cpu-debug.c | 141 ++++++++++++++--
>>>   .../coresight/coresight-etm4x-core.c          |   3 +
>>>   .../hwtracing/coresight/coresight-funnel.c    |  86 +++++-----
>>>   drivers/hwtracing/coresight/coresight-priv.h  |  10 ++
>>>   .../coresight/coresight-replicator.c          |  81 +++++-----
>>>   drivers/hwtracing/coresight/coresight-stm.c   | 115 +++++++++++--
>>>   .../hwtracing/coresight/coresight-tmc-core.c  | 153 +++++++++++++++---
>>>   drivers/hwtracing/coresight/coresight-tmc.h   |   2 +
>>>   drivers/hwtracing/coresight/coresight-tpiu.c  | 102 ++++++++++--
>>>   include/linux/coresight.h                     |   7 +
>>>   14 files changed, 721 insertions(+), 159 deletions(-)
>>>
>>