linux-kernel - Re: [PATCH v7 0/8] Add functions for getting and setting registers related to autonomous selection in cppc

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Message-ID: <CAJZ5v0gNZsv+sJ8OweGYE6bFTqD48g3JUJn_kL2m17Q2QX6p1w@mail.gmail.com>
Date: Wed, 30 Apr 2025 22:03:09 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Mario Limonciello <mario.limonciello@....com>, Lifeng Zheng <zhenglifeng1@...wei.com>
Cc: lenb@...nel.org, robert.moore@...el.com, viresh.kumar@...aro.org, 
	gautham.shenoy@....com, ray.huang@....com, perry.yuan@....com, 
	pierre.gondois@....com, sumitg@...dia.com, acpica-devel@...ts.linux.dev, 
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-pm@...r.kernel.org, linuxarm@...wei.com, jonathan.cameron@...wei.com, 
	zhanjie9@...ilicon.com, lihuisong@...wei.com, cenxinghai@...artners.com, 
	hepeng68@...wei.com
Subject: Re: [PATCH v7 0/8] Add functions for getting and setting registers
 related to autonomous selection in cppc_acpi

On Fri, Apr 11, 2025 at 8:18 PM Mario Limonciello
<mario.limonciello@....com> wrote:
>
> On 4/11/2025 4:38 AM, Lifeng Zheng wrote:
> > The patch series is organized in two parts:
> >
> >   - patch 1-6 refactor out the general CPPC register get and set functions
> >     in cppc_acpi.c
> >
> >   - patches 7-8 add functions for getting and setting values of auto_sel,
> >     energy_perf and auto_act_window in cppc_acpi.c
> >
> > Changelog:
> >
> > v7:
> >
> >   - Fix some typos
> >   - Add check of null pointer in cppc_get_reg_val(),
> >     cppc_get_auto_act_window() and cppc_get_auto_sel()
> >   - Replace ternary operator with logical expression in cppc_get_reg_val()
> >
> > v6:
> >
> >   - Remove the last patch, will resent it in the future after reaching an
> >     agreement with Sumit
> >   - split patch 3 into 2 smaller patches
> >   - Remove the printing of reg_idx in cppc_get_reg_val() and
> >     cppc_set_reg_val()
> >   - Change the logic for determing whether a register is supported in
> >     cppc_get_reg_val() and cppc_set_reg_val()
> >
> > v5:
> >
> >   - add more explanation to the commit logs and comments
> >   - change REG_OPTIONAL from bin to hex
> >   - split patch 2 into 3 smaller patches
> >   - remove CPPC_REG_VAL_READ() and CPPC_REG_VAL_WRITE() macros
> >   - move the modification part in patch 5 into a separate patch
> >   - rename the sysfs file from "energy_perf" to
> >     energy_performance_preference_val
> >
> > v4:
> >
> >   - add REG_OPTIONAL and IS_OPTIONAL_CPC_REG to judge if a cpc register is
> >     an optional one
> >   - check whether the register is optional before CPC_SUPPORTED check in
> >     cppc_get_reg_val() and cppc_set_reg_val()
> >   - check the register's type in cppc_set_reg_val()
> >   - add macros to generally implement registers getting and setting
> >     functions
> >   - move some logic codes from cppc_cpufreq.c to cppc_acpi.c
> >   - replace cppc_get_auto_sel_caps() by cppc_get_auto_sel()
> >
> > v3:
> >
> >   - change cppc_get_reg() and cppc_set_reg() name to cppc_get_reg_val() and
> >     cppc_set_reg_val()
> >   - extract cppc_get_reg_val_in_pcc() and cppc_set_reg_val_in_pcc()
> >   - return the result of cpc_read() in cppc_get_reg_val()
> >   - add pr_debug() in cppc_get_reg_val_in_pcc() when pcc_ss_id < 0
> >   - rename 'cpunum' to 'cpu' in cppc_get_reg_val()
> >   - move some macros from drivers/cpufreq/cppc_cpufreq.c to
> >     include/acpi/cppc_acpi.h with a CPPC_XXX prefix
> >
> > v2:
> >
> >   - fix some incorrect placeholder
> >   - change kstrtoul to kstrtobool in store_auto_select
> >
> > ---
> > Discussions of previous versions:
> > v1: https://lore.kernel.org/all/20241114084816.1128647-1-zhenglifeng1@huawei.com/
> > v2: https://lore.kernel.org/all/20241122062051.3658577-1-zhenglifeng1@huawei.com/
> > v3: https://lore.kernel.org/all/20241216091603.1247644-1-zhenglifeng1@huawei.com/
> > v4: https://lore.kernel.org/all/20250113122104.3870673-1-zhenglifeng1@huawei.com/
> > v5: https://lore.kernel.org/all/20250206131428.3261578-1-zhenglifeng1@huawei.com/
> > v6: https://lore.kernel.org/all/20250409065703.1461867-1-zhenglifeng1@huawei.com/
> >
> > Lifeng Zheng (8):
> >    ACPI: CPPC: Add IS_OPTIONAL_CPC_REG macro to judge if a cpc_reg is
> >      optional
> >    ACPI: CPPC: Optimize cppc_get_perf()
> >    ACPI: CPPC: Rename cppc_get_perf() to cppc_get_reg_val()
> >    ACPI: CPPC: Extract cppc_get_reg_val_in_pcc()
> >    ACPI: CPPC: Add cppc_set_reg_val()
> >    ACPI: CPPC: Refactor register value get and set ABIs
> >    ACPI: CPPC: Modify cppc_get_auto_sel_caps() to cppc_get_auto_sel()
> >    ACPI: CPPC: Add three functions related to autonomous selection
> >
> >   drivers/acpi/cppc_acpi.c     | 313 +++++++++++++++++++++--------------
> >   drivers/cpufreq/amd-pstate.c |   3 +-
> >   include/acpi/cppc_acpi.h     |  30 +++-
> >   3 files changed, 219 insertions(+), 127 deletions(-)
> >
>
> Reviewed-by: Mario Limonciello <mario.limonciello@....com>

All patches in the series applied as 6.16 material, thanks!