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Thu, 25 Apr 2024 13:29:40 -0400 (EDT) From: Lyndon Sanche To: lsanche@lyndeno.ca Cc: Matthew Garrett , =?UTF-8?q?Pali=20Roh=C3=A1r?= , Hans de Goede , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, Dell.Client.Kernel@dell.com Subject: [PATCH] platform/x86: dell-laptop: Implement platform_profile Date: Thu, 25 Apr 2024 11:27:57 -0600 Message-ID: <20240425172758.67831-1-lsanche@lyndeno.ca> X-Mailer: git-send-email 2.42.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Some Dell laptops support configuration of preset fan modes through smbios tables. If the platform supports these fan modes, set up platform_profile to change these modes. If not supported, skip enabling platform_profile. Signed-off-by: Lyndon Sanche --- drivers/platform/x86/dell/dell-laptop.c | 220 ++++++++++++++++++++++++ drivers/platform/x86/dell/dell-smbios.h | 1 + 2 files changed, 221 insertions(+) diff --git a/drivers/platform/x86/dell/dell-laptop.c b/drivers/platform/x86= /dell/dell-laptop.c index 42f7de2b4522..7f9c4e0e5ef5 100644 --- a/drivers/platform/x86/dell/dell-laptop.c +++ b/drivers/platform/x86/dell/dell-laptop.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include "dell-rbtn.h" #include "dell-smbios.h" @@ -95,10 +96,18 @@ static struct backlight_device *dell_backlight_device; static struct rfkill *wifi_rfkill; static struct rfkill *bluetooth_rfkill; static struct rfkill *wwan_rfkill; +static struct platform_profile_handler *thermal_handler; static bool force_rfkill; static bool micmute_led_registered; static bool mute_led_registered; =20 +enum thermal_mode_bits { + DELL_BALANCED =3D 0, + DELL_COOL_BOTTOM =3D 1, + DELL_QUIET =3D 2, + DELL_PERFORMANCE =3D 3, +}; + module_param(force_rfkill, bool, 0444); MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models"); =20 @@ -2199,6 +2208,211 @@ static int mute_led_set(struct led_classdev *led_cd= ev, return 0; } =20 +// Derived from smbios-thermal-ctl +// +// cbClass 17 +// cbSelect 19 +// User Selectable Thermal Tables(USTT) +// cbArg1 determines the function to be performed +// cbArg1 0x0 =3D Get Thermal Information +// cbRES1 Standard return codes (0, -1, -2) +// cbRES2, byte 0 Bitmap of supported thermal modes. A mode is supported= if its bit is set to 1 +// Bit 0 Balanced +// Bit 1 Cool Bottom +// Bit 2 Quiet +// Bit 3 Performance +// cbRES2, byte 1 Bitmap of supported Active Acoustic Controller (AAC) mo= des. Each mode +// corresponds to the supported thermal modes in byte 0. A= mode is supported if +// its bit is set to 1. +// Bit 0 AAC (Balanced) +// Bit 1 AAC (Cool Bottom +// Bit 2 AAC (Quiet) +// Bit 3 AAC (Performance) +// cbRes3, byte 0 Current Thermal Mode +// Bit 0 Balanced +// Bit 1 Cool Bottom +// Bit 2 Quiet +// Bit 3 Performanc +// cbRes3, byte 1 AAC Configuration type +// 0 Global (AAC enable/disable applies to all supported US= TT modes) +// 1 USTT mode specific +// cbRes3, byte 2 Current Active Acoustic Controller (AAC) Mode +// If AAC Configuration Type is Global, +// 0 AAC mode disabled +// 1 AAC mode enabled +// If AAC Configuration Type is USTT mode specific (multiple bits may = be set), +// Bit 0 AAC (Balanced) +// Bit 1 AAC (Cool Bottom +// Bit 2 AAC (Quiet) +// Bit 3 AAC (Performance) +// cbRes3, byte 3 Current Fan Failure Mode +// Bit 0 Minimal Fan Failure (at least one fan has failed, one fan wor= king) +// Bit 1 Catastrophic Fan Failure (all fans have failed) +// cbArg1 0x1 (Set Thermal Information), both desired thermal mode and +// desired AAC mode shall be applied +// cbArg2, byte 0 Desired Thermal Mode to set (only one bit may be set f= or this parameter) +// Bit 0 Balanced +// Bit 1 Cool Bottom +// Bit 2 Quiet +// Bit 3 Performance +// cbArg2, byte 1 Desired Active Acoustic Controller (AAC) Mode to set +// If AAC Configuration Type is Global, +// 0 AAC mode disabled +// 1 AAC mode enabled +// +// If AAC Configuration Type is USTT mode specific (multiple bits may = be set for this parameter), +// Bit 0 AAC (Balanced) +// Bit 1 AAC (Cool Bottom +// Bit 2 AAC (Quiet) +// Bit 3 AAC (Performance) +static int thermal_get_mode(void) +{ + struct calling_interface_buffer buffer; + int state; + int ret; + + dell_fill_request(&buffer, 0x0, 0, 0, 0); + ret =3D dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT); + if (ret) + return ret; + state =3D buffer.output[2]; + if ((state >> DELL_BALANCED) & 1) + return DELL_BALANCED; + else if ((state >> DELL_COOL_BOTTOM) & 1) + return DELL_COOL_BOTTOM; + else if ((state >> DELL_QUIET) & 1) + return DELL_QUIET; + else if ((state >> DELL_PERFORMANCE) & 1) + return DELL_PERFORMANCE; + else + return 0; +} + +static int thermal_get_supported_modes(int *supported_bits) +{ + struct calling_interface_buffer buffer; + int ret; + + dell_fill_request(&buffer, 0x0, 0, 0, 0); + ret =3D dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT); + if (ret) + return ret; + *supported_bits =3D buffer.output[1] & 0xF; + return 0; +} + +static int thermal_get_acc_mode(int *acc_mode) +{ + struct calling_interface_buffer buffer; + int ret; + + dell_fill_request(&buffer, 0x0, 0, 0, 0); + ret =3D dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT); + if (ret) + return ret; + *acc_mode =3D ((buffer.output[3] >> 8) & 0xFF); + return 0; +} + +static int thermal_set_mode(enum thermal_mode_bits state) +{ + struct calling_interface_buffer buffer; + int ret; + int acc_mode; + + ret =3D thermal_get_acc_mode(&acc_mode); + if (ret) + return ret; + + dell_fill_request(&buffer, 0x1, (acc_mode << 8) | BIT(state), 0, 0); + ret =3D dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT); + return ret; +} + +static int thermal_platform_profile_set(struct platform_profile_handler *p= prof, + enum platform_profile_option profile) +{ + int ret; + + switch (profile) { + case PLATFORM_PROFILE_BALANCED: + ret =3D thermal_set_mode(DELL_BALANCED); + break; + case PLATFORM_PROFILE_PERFORMANCE: + ret =3D thermal_set_mode(DELL_PERFORMANCE); + break; + case PLATFORM_PROFILE_QUIET: + ret =3D thermal_set_mode(DELL_QUIET); + break; + case PLATFORM_PROFILE_COOL: + ret =3D thermal_set_mode(DELL_COOL_BOTTOM); + break; + default: + return -EOPNOTSUPP; + } + + return ret; +} + +static int thermal_platform_profile_get(struct platform_profile_handler *p= prof, + enum platform_profile_option *profile) +{ + switch (thermal_get_mode()) { + case DELL_BALANCED: + *profile =3D PLATFORM_PROFILE_BALANCED; + break; + case DELL_PERFORMANCE: + *profile =3D PLATFORM_PROFILE_PERFORMANCE; + break; + case DELL_COOL_BOTTOM: + *profile =3D PLATFORM_PROFILE_COOL; + break; + case DELL_QUIET: + *profile =3D PLATFORM_PROFILE_QUIET; + break; + default: + return -EINVAL; + } + + return 0; +} + +int thermal_init(void) +{ + int ret; + int supported_modes; + + ret =3D thermal_get_supported_modes(&supported_modes); + + if (ret !=3D 0 || supported_modes =3D=3D 0) + return -ENXIO; + + thermal_handler =3D kzalloc(sizeof(*thermal_handler), GFP_KERNEL); + if (!thermal_handler) + return -ENOMEM; + thermal_handler->profile_get =3D thermal_platform_profile_get; + thermal_handler->profile_set =3D thermal_platform_profile_set; + + if ((supported_modes >> DELL_QUIET) & 1) + set_bit(PLATFORM_PROFILE_QUIET, thermal_handler->choices); + if ((supported_modes >> DELL_COOL_BOTTOM) & 1) + set_bit(PLATFORM_PROFILE_COOL, thermal_handler->choices); + if ((supported_modes >> DELL_BALANCED) & 1) + set_bit(PLATFORM_PROFILE_BALANCED, thermal_handler->choices); + if ((supported_modes >> DELL_PERFORMANCE) & 1) + set_bit(PLATFORM_PROFILE_PERFORMANCE, thermal_handler->choices); + + platform_profile_register(thermal_handler); + + return 0; +} + +void thermal_cleanup(void) +{ + platform_profile_remove(); + kfree(thermal_handler); +} + static struct led_classdev mute_led_cdev =3D { .name =3D "platform::mute", .max_brightness =3D 1, @@ -2266,6 +2480,11 @@ static int __init dell_init(void) mute_led_registered =3D true; } =20 + // Do not fail module if thermal modes not supported, + // just skip + if (thermal_init() !=3D 0) + pr_warn("Unable to setup platform_profile, skipping"); + if (acpi_video_get_backlight_type() !=3D acpi_backlight_vendor) return 0; =20 @@ -2344,6 +2563,7 @@ static void __exit dell_exit(void) platform_device_unregister(platform_device); platform_driver_unregister(&platform_driver); } + thermal_cleanup(); } =20 /* dell-rbtn.c driver export functions which will not work correctly (and = could diff --git a/drivers/platform/x86/dell/dell-smbios.h b/drivers/platform/x86= /dell/dell-smbios.h index eb341bf000c6..585d042f1779 100644 --- a/drivers/platform/x86/dell/dell-smbios.h +++ b/drivers/platform/x86/dell/dell-smbios.h @@ -19,6 +19,7 @@ /* Classes and selects used only in kernel drivers */ #define CLASS_KBD_BACKLIGHT 4 #define SELECT_KBD_BACKLIGHT 11 +#define SELECT_THERMAL_MANAGEMENT 19 =20 /* Tokens used in kernel drivers, any of these * should be filtered from userspace access --=20 2.42.0