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platform/x86: dell-pc: Implement platform_profile
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 <lsanche@lyndeno.ca> Link: https://lore.kernel.org/r/20240529174843.13226-4-lsanche@lyndeno.ca [ij: Adjust #includes into alphabetical order] Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Lyndon Sanche
Ilpo Järvinen
parent
33245680ae
commit
996ad41298
@ -6116,6 +6116,12 @@ F: Documentation/ABI/obsolete/procfs-i8k
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F: drivers/hwmon/dell-smm-hwmon.c
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F: include/uapi/linux/i8k.h
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DELL PC DRIVER
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M: Lyndon Sanche <lsanche@lyndeno.ca>
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L: platform-driver-x86@vger.kernel.org
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S: Maintained
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F: drivers/platform/x86/dell/dell-pc.c
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DELL REMOTE BIOS UPDATE DRIVER
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M: Stuart Hayes <stuart.w.hayes@gmail.com>
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L: platform-driver-x86@vger.kernel.org
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@ -91,6 +91,19 @@ config DELL_RBTN
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To compile this driver as a module, choose M here: the module will
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be called dell-rbtn.
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config DELL_PC
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tristate "Dell PC Extras"
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default m
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depends on ACPI
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depends on DMI
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depends on DELL_SMBIOS
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select ACPI_PLATFORM_PROFILE
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help
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This driver adds support for controlling the fan modes via platform_profile
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on supported Dell systems regardless of formfactor.
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Module will simply do nothing if thermal management commands are not
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supported.
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#
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# The DELL_SMBIOS driver depends on ACPI_WMI and/or DCDBAS if those
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# backends are selected. The "depends" line prevents a configuration
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@ -9,6 +9,7 @@ obj-$(CONFIG_DCDBAS) += dcdbas.o
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obj-$(CONFIG_DELL_LAPTOP) += dell-laptop.o
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obj-$(CONFIG_DELL_RBTN) += dell-rbtn.o
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obj-$(CONFIG_DELL_RBU) += dell_rbu.o
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obj-$(CONFIG_DELL_PC) += dell-pc.o
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obj-$(CONFIG_DELL_SMBIOS) += dell-smbios.o
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dell-smbios-objs := dell-smbios-base.o
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dell-smbios-$(CONFIG_DELL_SMBIOS_WMI) += dell-smbios-wmi.o
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307
drivers/platform/x86/dell/dell-pc.c
Normal file
307
drivers/platform/x86/dell/dell-pc.c
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@ -0,0 +1,307 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Driver for Dell laptop extras
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*
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* Copyright (c) Lyndon Sanche <lsanche@lyndeno.ca>
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*
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* Based on documentation in the libsmbios package:
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* Copyright (C) 2005-2014 Dell Inc.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/bitfield.h>
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#include <linux/bits.h>
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#include <linux/dmi.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_profile.h>
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#include <linux/slab.h>
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#include "dell-smbios.h"
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static const struct dmi_system_id dell_device_table[] __initconst = {
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{
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.ident = "Dell Inc.",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
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},
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},
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{
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.ident = "Dell Computer Corporation",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
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},
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},
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{ }
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};
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MODULE_DEVICE_TABLE(dmi, dell_device_table);
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/* Derived from smbios-thermal-ctl
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*
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* cbClass 17
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* cbSelect 19
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* User Selectable Thermal Tables(USTT)
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* cbArg1 determines the function to be performed
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* cbArg1 0x0 = Get Thermal Information
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* cbRES1 Standard return codes (0, -1, -2)
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* cbRES2, byte 0 Bitmap of supported thermal modes. A mode is supported if
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* its bit is set to 1
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* Bit 0 Balanced
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* Bit 1 Cool Bottom
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* Bit 2 Quiet
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* Bit 3 Performance
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* cbRES2, byte 1 Bitmap of supported Active Acoustic Controller (AAC) modes.
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* Each mode corresponds to the supported thermal modes in
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* byte 0. A mode is supported if its bit is set to 1.
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* Bit 0 AAC (Balanced)
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* Bit 1 AAC (Cool Bottom
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* Bit 2 AAC (Quiet)
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* Bit 3 AAC (Performance)
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* cbRes3, byte 0 Current Thermal Mode
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* Bit 0 Balanced
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* Bit 1 Cool Bottom
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* Bit 2 Quiet
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* Bit 3 Performanc
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* cbRes3, byte 1 AAC Configuration type
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* 0 Global (AAC enable/disable applies to all supported USTT modes)
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* 1 USTT mode specific
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* cbRes3, byte 2 Current Active Acoustic Controller (AAC) Mode
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* If AAC Configuration Type is Global,
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* 0 AAC mode disabled
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* 1 AAC mode enabled
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* If AAC Configuration Type is USTT mode specific (multiple bits may be set),
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* Bit 0 AAC (Balanced)
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* Bit 1 AAC (Cool Bottom
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* Bit 2 AAC (Quiet)
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* Bit 3 AAC (Performance)
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* cbRes3, byte 3 Current Fan Failure Mode
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* Bit 0 Minimal Fan Failure (at least one fan has failed, one fan working)
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* Bit 1 Catastrophic Fan Failure (all fans have failed)
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*
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* cbArg1 0x1 (Set Thermal Information), both desired thermal mode and
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* desired AAC mode shall be applied
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* cbArg2, byte 0 Desired Thermal Mode to set
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* (only one bit may be set for this parameter)
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* Bit 0 Balanced
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* Bit 1 Cool Bottom
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* Bit 2 Quiet
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* Bit 3 Performance
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* cbArg2, byte 1 Desired Active Acoustic Controller (AAC) Mode to set
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* If AAC Configuration Type is Global,
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* 0 AAC mode disabled
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* 1 AAC mode enabled
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* If AAC Configuration Type is USTT mode specific
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* (multiple bits may be set for this parameter),
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* Bit 0 AAC (Balanced)
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* Bit 1 AAC (Cool Bottom
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* Bit 2 AAC (Quiet)
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* Bit 3 AAC (Performance)
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*/
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#define DELL_ACC_GET_FIELD GENMASK(19, 16)
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#define DELL_ACC_SET_FIELD GENMASK(11, 8)
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#define DELL_THERMAL_SUPPORTED GENMASK(3, 0)
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static struct platform_profile_handler *thermal_handler;
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enum thermal_mode_bits {
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DELL_BALANCED = BIT(0),
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DELL_COOL_BOTTOM = BIT(1),
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DELL_QUIET = BIT(2),
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DELL_PERFORMANCE = BIT(3),
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};
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static int thermal_get_mode(void)
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{
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struct calling_interface_buffer buffer;
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int state;
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int ret;
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dell_fill_request(&buffer, 0x0, 0, 0, 0);
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ret = dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT);
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if (ret)
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return ret;
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state = buffer.output[2];
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if (state & DELL_BALANCED)
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return DELL_BALANCED;
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else if (state & DELL_COOL_BOTTOM)
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return DELL_COOL_BOTTOM;
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else if (state & DELL_QUIET)
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return DELL_QUIET;
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else if (state & DELL_PERFORMANCE)
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return DELL_PERFORMANCE;
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else
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return -ENXIO;
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}
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static int thermal_get_supported_modes(int *supported_bits)
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{
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struct calling_interface_buffer buffer;
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int ret;
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dell_fill_request(&buffer, 0x0, 0, 0, 0);
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ret = dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT);
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/* Thermal function not supported */
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if (ret == -ENXIO) {
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*supported_bits = 0;
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return 0;
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}
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if (ret)
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return ret;
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*supported_bits = FIELD_GET(DELL_THERMAL_SUPPORTED, buffer.output[1]);
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return 0;
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}
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static int thermal_get_acc_mode(int *acc_mode)
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{
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struct calling_interface_buffer buffer;
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int ret;
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dell_fill_request(&buffer, 0x0, 0, 0, 0);
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ret = dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT);
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if (ret)
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return ret;
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*acc_mode = FIELD_GET(DELL_ACC_GET_FIELD, buffer.output[3]);
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return 0;
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}
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static int thermal_set_mode(enum thermal_mode_bits state)
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{
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struct calling_interface_buffer buffer;
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int ret;
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int acc_mode;
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ret = thermal_get_acc_mode(&acc_mode);
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if (ret)
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return ret;
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dell_fill_request(&buffer, 0x1, FIELD_PREP(DELL_ACC_SET_FIELD, acc_mode) | state, 0, 0);
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return dell_send_request(&buffer, CLASS_INFO, SELECT_THERMAL_MANAGEMENT);
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}
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static int thermal_platform_profile_set(struct platform_profile_handler *pprof,
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enum platform_profile_option profile)
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{
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switch (profile) {
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case PLATFORM_PROFILE_BALANCED:
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return thermal_set_mode(DELL_BALANCED);
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case PLATFORM_PROFILE_PERFORMANCE:
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return thermal_set_mode(DELL_PERFORMANCE);
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case PLATFORM_PROFILE_QUIET:
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return thermal_set_mode(DELL_QUIET);
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case PLATFORM_PROFILE_COOL:
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return thermal_set_mode(DELL_COOL_BOTTOM);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int thermal_platform_profile_get(struct platform_profile_handler *pprof,
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enum platform_profile_option *profile)
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{
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int ret;
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ret = thermal_get_mode();
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if (ret < 0)
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return ret;
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switch (ret) {
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case DELL_BALANCED:
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*profile = PLATFORM_PROFILE_BALANCED;
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break;
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case DELL_PERFORMANCE:
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*profile = PLATFORM_PROFILE_PERFORMANCE;
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break;
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case DELL_COOL_BOTTOM:
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*profile = PLATFORM_PROFILE_COOL;
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break;
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case DELL_QUIET:
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*profile = PLATFORM_PROFILE_QUIET;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int thermal_init(void)
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{
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int ret;
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int supported_modes;
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/* If thermal commands are not supported, exit without error */
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if (!dell_smbios_class_is_supported(CLASS_INFO))
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return 0;
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/* If thermal modes are not supported, exit without error */
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ret = thermal_get_supported_modes(&supported_modes);
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if (ret < 0)
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return ret;
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if (!supported_modes)
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return 0;
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thermal_handler = kzalloc(sizeof(*thermal_handler), GFP_KERNEL);
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if (!thermal_handler)
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return -ENOMEM;
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thermal_handler->profile_get = thermal_platform_profile_get;
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thermal_handler->profile_set = thermal_platform_profile_set;
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if (supported_modes & DELL_QUIET)
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set_bit(PLATFORM_PROFILE_QUIET, thermal_handler->choices);
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if (supported_modes & DELL_COOL_BOTTOM)
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set_bit(PLATFORM_PROFILE_COOL, thermal_handler->choices);
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if (supported_modes & DELL_BALANCED)
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set_bit(PLATFORM_PROFILE_BALANCED, thermal_handler->choices);
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if (supported_modes & DELL_PERFORMANCE)
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set_bit(PLATFORM_PROFILE_PERFORMANCE, thermal_handler->choices);
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/* Clean up if failed */
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ret = platform_profile_register(thermal_handler);
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if (ret)
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kfree(thermal_handler);
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return ret;
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}
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static void thermal_cleanup(void)
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{
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if (thermal_handler) {
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platform_profile_remove();
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kfree(thermal_handler);
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}
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}
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static int __init dell_init(void)
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{
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int ret;
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if (!dmi_check_system(dell_device_table))
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return -ENODEV;
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/* Do not fail module if thermal modes not supported, just skip */
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ret = thermal_init();
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if (ret)
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goto fail_thermal;
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return 0;
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fail_thermal:
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thermal_cleanup();
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return ret;
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}
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static void __exit dell_exit(void)
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{
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thermal_cleanup();
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}
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module_init(dell_init);
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module_exit(dell_exit);
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MODULE_AUTHOR("Lyndon Sanche <lsanche@lyndeno.ca>");
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MODULE_DESCRIPTION("Dell PC driver");
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MODULE_LICENSE("GPL");
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@ -71,6 +71,7 @@ static struct smbios_call call_blacklist[] = {
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/* handled by kernel: dell-laptop */
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{0x0000, CLASS_INFO, SELECT_RFKILL},
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{0x0000, CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT},
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{0x0000, CLASS_INFO, SELECT_THERMAL_MANAGEMENT},
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};
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struct token_range {
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@ -19,6 +19,7 @@
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/* Classes and selects used only in kernel drivers */
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#define CLASS_KBD_BACKLIGHT 4
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#define SELECT_KBD_BACKLIGHT 11
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#define SELECT_THERMAL_MANAGEMENT 19
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/* Tokens used in kernel drivers, any of these
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* should be filtered from userspace access
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