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Message-ID: <12f980ac-f1d3-a802-37a9-cb6e03b046de@linux.intel.com>
Date: Tue, 29 Oct 2024 19:06:18 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Kurt Borja <kuurtb@...il.com>
cc: W_Armin@....de, Hans de Goede <hdegoede@...hat.com>, 
    LKML <linux-kernel@...r.kernel.org>, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v10 3/5] alienware-wmi: added platform profile support

On Tue, 29 Oct 2024, Kurt Borja wrote:

> On Tue, Oct 29, 2024 at 05:44:05PM +0200, Ilpo Järvinen wrote:
> > On Tue, 29 Oct 2024, Kurt Borja wrote:
> > 
> > > Implements platform profile support for Dell laptops with new WMAX thermal
> > > interface, present on some Alienware X-Series, Alienware M-Series and
> > > Dell's G-Series laptops. This interface is suspected to be used by
> > > Alienware Command Center (AWCC), which is not available for linux
> > > systems, to manage thermal profiles.
> > > 
> > > This implementation makes use of three WMI methods, namely
> > > THERMAL_CONTROL, THERMAL_INFORMATION and GAME_SHIFT_STATUS, which take
> > > u32 as input and output arguments. Each method has a set of supported
> > > operations specified in their respective enums.
> > > 
> > > Not all models with WMAX WMI interface support these methods. Because of
> > > this, models have to manually declare support through new quirks
> > > `thermal` for THERMAL_CONTROL and THERMAL_INFORMATION and `gmode` for
> > > GAME_SHIFT_STATUS.
> > > 
> > > Wrappers written for these methods support multiple operations.
> > > 
> > > THERMAL_CONTROL switches thermal modes through operation
> > > ACTIVATE_PROFILE. Available thermal codes are auto-detected at runtime
> > > and matched against a list of known thermal codes:
> > > 
> > > Thermal Table "User Selectable Thermal Tables" (USTT):
> > > 	BALANCED			0xA0
> > > 	BALANCED_PERFORMANCE		0xA1
> > > 	COOL				0xA2
> > > 	QUIET				0xA3
> > > 	PERFORMANCE			0xA4
> > > 	LOW_POWER			0xA5
> > > 
> > > Thermal Table Basic:
> > > 	QUIET				0x96
> > > 	BALANCED			0x97
> > > 	BALANCED_PERFORMANCE		0x98
> > > 	PERFORMANCE			0x99
> > > 
> > > Devices are known to implement only one of these tables without mixing
> > > their thermal codes.
> > > 
> > > The fact that the least significant digit of every thermal code is
> > > consecutive of one another is exploited to efficiently match codes
> > > through arrays.
> > > 
> > > Autodetection of available codes is done through operation LIST_IDS of
> > > method THERMAL_INFORMATION. This operation lists fan IDs, CPU sensor ID,
> > > GPU sensor ID and available thermal profile codes, *in that order*. As
> > > number of fans and thermal codes is very model dependent, almost every
> > > ID is scanned and matched based on conditions found on
> > > is_wmax_thermal_code(). The known upper bound for the number of IDs is
> > > 13, corresponding to a device that have 4 fans, 2 sensors and 7 thermal
> > > codes.
> > > 
> > > Additionally G-Series laptops have a key called G-key, which (with AWCC
> > > proprietary driver) switches the thermal mode to an special mode named
> > > GMODE with code 0xAB and changes Game Shift Status to 1. Game Shift is a
> > > mode the manufacturer claims, increases gaming performance.
> > > 
> > > GAME_SHIFT_STATUS method is used to mimic this behavior when selecting
> > > PLATFORM_PROFILE_PERFORMANCE option.
> > > 
> > > All of these profiles are known to only change fan speed profiles,
> > > although there are untested claims that some of them also change power
> > > profiles.
> > > 
> > > Activating a thermal mode with method THERMAL_CONTROL may cause short
> > > hangs. This is a known problem present on every platform.
> > > 
> > > Signed-off-by: Kurt Borja <kuurtb@...il.com>
> > > Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> > > ---
> > > v10:
> > >  - Corrected THERMAL_MODE_BASIC_BALANCED -> THERMAL_MODE_BASIC_QUIET in
> > >    is_wmax_thermal_code() logic
> > >  - `thermal` and `gmode` quirks now have to be manually selected,
> > >    because not all Dell devices posses the new WMI thermal methods.
> > >  - Because of the above reason, errors in create_thermal_profile are now
> > >    propagated
> > > v9:
> > >  - Bool comparisons are now coherent with their type
> > > v8:
> > >  - Fixed alignment in wmax_mode_to_platform_profile[]
> > >  - Quirk thermal and gmode changed from u8 -> bool
> > >  - Autodetected quirk entries are not initialized
> > >  - is_wmax_thermal_code refactored to increase readibility
> > >  - is_wmax_thermal_code now covers all possibilities
> > >  - Better commit message
> > > v7:
> > >  - Method operations are now clearly listed as separate enums
> > >  - wmax_thermal_modes are now listed without codes in order to support
> > >    autodetection, as well as getting and setting thermal profiles
> > >    cleanly through arrays
> > >  - Added wmax_mode_to_platform_profile[]
> > >  - Added struct wmax_u32_args to replace bit mask approach of
> > >    constructing arguments for wmax methods
> > >  - create_thermal_profile now autodetects available thermal codes
> > >    through operation 0x03 of THERMAL_INFORMATION method. These are
> > >    codes are stored in supported_thermal_profiles[]
> > >  - thermal_profile_get now uses wmax_mode_to_platform_profile[] instead of
> > >    switch-case approach
> > >  - thermal_profile_set now uses supported_thermal_profiles[] instead of
> > >    switch-case approach
> > >  - When gmode is autodetected, thermal_profile_set also sets Game Shift
> > >    status accordingly
> > > v6:
> > >  - Fixed alignment on some function definitions
> > >  - Fixed braces on if statment
> > >  - Removed quirk thermal_ustt
> > >  - Now quirk thermal can take values defined in enum WMAX_THERMAL_TABLE.
> > >  - Proper removal of thermal_profile
> > > ---
> > >  drivers/platform/x86/dell/Kconfig         |   1 +
> > >  drivers/platform/x86/dell/alienware-wmi.c | 306 ++++++++++++++++++++++
> > >  2 files changed, 307 insertions(+)
> > > 
> > > diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig
> > > index 68a49788a..b06d634cd 100644
> > > --- a/drivers/platform/x86/dell/Kconfig
> > > +++ b/drivers/platform/x86/dell/Kconfig
> > > @@ -21,6 +21,7 @@ config ALIENWARE_WMI
> > >  	depends on LEDS_CLASS
> > >  	depends on NEW_LEDS
> > >  	depends on ACPI_WMI
> > > +	select ACPI_PLATFORM_PROFILE
> > >  	help
> > >  	 This is a driver for controlling Alienware BIOS driven
> > >  	 features.  It exposes an interface for controlling the AlienFX
> > > diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c
> > > index b27f3b64c..1d62c2ce7 100644
> > > --- a/drivers/platform/x86/dell/alienware-wmi.c
> > > +++ b/drivers/platform/x86/dell/alienware-wmi.c
> > > @@ -8,8 +8,11 @@
> > >  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> > >  
> > >  #include <linux/acpi.h>
> > > +#include <linux/bitfield.h>
> > > +#include <linux/bits.h>
> > >  #include <linux/module.h>
> > >  #include <linux/platform_device.h>
> > > +#include <linux/platform_profile.h>
> > >  #include <linux/dmi.h>
> > >  #include <linux/leds.h>
> > >  
> > > @@ -25,6 +28,13 @@
> > >  #define WMAX_METHOD_AMPLIFIER_CABLE	0x6
> > >  #define WMAX_METHOD_DEEP_SLEEP_CONTROL	0x0B
> > >  #define WMAX_METHOD_DEEP_SLEEP_STATUS	0x0C
> > > +#define WMAX_METHOD_THERMAL_INFORMATION	0x14
> > > +#define WMAX_METHOD_THERMAL_CONTROL	0x15
> > > +#define WMAX_METHOD_GAME_SHIFT_STATUS	0x25
> > > +
> > > +#define WMAX_THERMAL_MODE_GMODE		0xAB
> > > +
> > > +#define WMAX_FAILURE_CODE		0xFFFFFFFF
> > >  
> > >  MODULE_AUTHOR("Mario Limonciello <mario.limonciello@...look.com>");
> > >  MODULE_DESCRIPTION("Alienware special feature control");
> > > @@ -49,11 +59,59 @@ enum WMAX_CONTROL_STATES {
> > >  	WMAX_SUSPEND = 3,
> > >  };
> > >  
> > > +enum WMAX_THERMAL_INFORMATION_OPERATIONS {
> > > +	WMAX_OPERATION_LIST_IDS			= 0x03,
> > > +	WMAX_OPERATION_CURRENT_PROFILE		= 0x0B,
> > > +};
> > > +
> > > +enum WMAX_THERMAL_CONTROL_OPERATIONS {
> > > +	WMAX_OPERATION_ACTIVATE_PROFILE		= 0x01,
> > > +};
> > > +
> > > +enum WMAX_GAME_SHIFT_STATUS_OPERATIONS {
> > > +	WMAX_OPERATION_TOGGLE_GAME_SHIFT	= 0x01,
> > > +	WMAX_OPERATION_GET_GAME_SHIFT_STATUS	= 0x02,
> > > +};
> > > +
> > > +enum WMAX_THERMAL_TABLES {
> > > +	WMAX_THERMAL_TABLE_BASIC		= 0x90,
> > > +	WMAX_THERMAL_TABLE_USTT			= 0xA0,
> > > +};
> > > +
> > > +enum wmax_thermal_mode {
> > > +	THERMAL_MODE_USTT_BALANCED,
> > > +	THERMAL_MODE_USTT_BALANCED_PERFORMANCE,
> > > +	THERMAL_MODE_USTT_COOL,
> > > +	THERMAL_MODE_USTT_QUIET,
> > > +	THERMAL_MODE_USTT_PERFORMANCE,
> > > +	THERMAL_MODE_USTT_LOW_POWER,
> > > +	THERMAL_MODE_BASIC_QUIET,
> > > +	THERMAL_MODE_BASIC_BALANCED,
> > > +	THERMAL_MODE_BASIC_BALANCED_PERFORMANCE,
> > > +	THERMAL_MODE_BASIC_PERFORMANCE,
> > > +	THERMAL_MODE_LAST,
> > > +};
> > > +
> > > +static const enum platform_profile_option wmax_mode_to_platform_profile[THERMAL_MODE_LAST] = {
> > > +	[THERMAL_MODE_USTT_BALANCED]			= PLATFORM_PROFILE_BALANCED,
> > > +	[THERMAL_MODE_USTT_BALANCED_PERFORMANCE]	= PLATFORM_PROFILE_BALANCED_PERFORMANCE,
> > > +	[THERMAL_MODE_USTT_COOL]			= PLATFORM_PROFILE_COOL,
> > > +	[THERMAL_MODE_USTT_QUIET]			= PLATFORM_PROFILE_QUIET,
> > > +	[THERMAL_MODE_USTT_PERFORMANCE]			= PLATFORM_PROFILE_PERFORMANCE,
> > > +	[THERMAL_MODE_USTT_LOW_POWER]			= PLATFORM_PROFILE_LOW_POWER,
> > > +	[THERMAL_MODE_BASIC_QUIET]			= PLATFORM_PROFILE_QUIET,
> > > +	[THERMAL_MODE_BASIC_BALANCED]			= PLATFORM_PROFILE_BALANCED,
> > > +	[THERMAL_MODE_BASIC_BALANCED_PERFORMANCE]	= PLATFORM_PROFILE_BALANCED_PERFORMANCE,
> > > +	[THERMAL_MODE_BASIC_PERFORMANCE]		= PLATFORM_PROFILE_PERFORMANCE,
> > > +};
> > > +
> > >  struct quirk_entry {
> > >  	u8 num_zones;
> > >  	u8 hdmi_mux;
> > >  	u8 amplifier;
> > >  	u8 deepslp;
> > > +	bool thermal;
> > > +	bool gmode;
> > >  };
> > >  
> > >  static struct quirk_entry *quirks;
> > > @@ -64,6 +122,8 @@ static struct quirk_entry quirk_inspiron5675 = {
> > >  	.hdmi_mux = 0,
> > >  	.amplifier = 0,
> > >  	.deepslp = 0,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > >  };
> > >  
> > >  static struct quirk_entry quirk_unknown = {
> > > @@ -71,6 +131,8 @@ static struct quirk_entry quirk_unknown = {
> > >  	.hdmi_mux = 0,
> > >  	.amplifier = 0,
> > >  	.deepslp = 0,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > >  };
> > >  
> > >  static struct quirk_entry quirk_x51_r1_r2 = {
> > > @@ -78,6 +140,8 @@ static struct quirk_entry quirk_x51_r1_r2 = {
> > >  	.hdmi_mux = 0,
> > >  	.amplifier = 0,
> > >  	.deepslp = 0,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > >  };
> > >  
> > >  static struct quirk_entry quirk_x51_r3 = {
> > > @@ -85,6 +149,8 @@ static struct quirk_entry quirk_x51_r3 = {
> > >  	.hdmi_mux = 0,
> > >  	.amplifier = 1,
> > >  	.deepslp = 0,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > >  };
> > >  
> > >  static struct quirk_entry quirk_asm100 = {
> > > @@ -92,6 +158,8 @@ static struct quirk_entry quirk_asm100 = {
> > >  	.hdmi_mux = 1,
> > >  	.amplifier = 0,
> > >  	.deepslp = 0,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > >  };
> > >  
> > >  static struct quirk_entry quirk_asm200 = {
> > > @@ -99,6 +167,8 @@ static struct quirk_entry quirk_asm200 = {
> > >  	.hdmi_mux = 1,
> > >  	.amplifier = 0,
> > >  	.deepslp = 1,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > >  };
> > >  
> > >  static struct quirk_entry quirk_asm201 = {
> > > @@ -106,6 +176,17 @@ static struct quirk_entry quirk_asm201 = {
> > >  	.hdmi_mux = 1,
> > >  	.amplifier = 1,
> > >  	.deepslp = 1,
> > > +	.thermal = false,
> > > +	.gmode = false,
> > > +};
> > > +
> > > +static struct quirk_entry quirk_x_series = {
> > > +	.num_zones = 2,
> > > +	.hdmi_mux = 0,
> > > +	.amplifier = 0,
> > > +	.deepslp = 0,
> > > +	.thermal = true,
> > > +	.gmode = false,
> > >  };
> > 
> > So now gmode is always false unless the module parameter from patch 4 is 
> > given?
> 
> G-Series laptops can also register a quirk_entry with gmode set in the
> future. I can do it ahead of time, but I don't have a G-Series laptop to
> test it.

Understood. I'm fine with this in the current form if it's fine for Armin 
too.

-- 
 i.

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