diff options
Diffstat (limited to 'drivers/platform/x86/hp/hp-wmi.c')
| -rw-r--r-- | drivers/platform/x86/hp/hp-wmi.c | 188 |
1 files changed, 171 insertions, 17 deletions
diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c index 5fa553023842..876e0a97cee1 100644 --- a/drivers/platform/x86/hp/hp-wmi.c +++ b/drivers/platform/x86/hp/hp-wmi.c @@ -24,6 +24,9 @@ #include <linux/platform_profile.h> #include <linux/hwmon.h> #include <linux/acpi.h> +#include <linux/mutex.h> +#include <linux/cleanup.h> +#include <linux/power_supply.h> #include <linux/rfkill.h> #include <linux/string.h> #include <linux/dmi.h> @@ -42,6 +45,8 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45E9-BE91-3D44E2C707E4"); #define HP_OMEN_EC_THERMAL_PROFILE_TIMER_OFFSET 0x63 #define HP_OMEN_EC_THERMAL_PROFILE_OFFSET 0x95 +#define ACPI_AC_CLASS "ac_adapter" + #define zero_if_sup(tmp) (zero_insize_support?0:sizeof(tmp)) // use when zero insize is required /* DMI board names of devices that should use the omen specific path for @@ -259,10 +264,18 @@ static const struct key_entry hp_wmi_keymap[] = { { KE_END, 0 } }; +/* + * Mutex for the active_platform_profile variable, + * see omen_powersource_event. + */ +static DEFINE_MUTEX(active_platform_profile_lock); + static struct input_dev *hp_wmi_input_dev; static struct input_dev *camera_shutter_input_dev; static struct platform_device *hp_wmi_platform_dev; static struct platform_profile_handler platform_profile_handler; +static struct notifier_block platform_power_source_nb; +static enum platform_profile_option active_platform_profile; static bool platform_profile_support; static bool zero_insize_support; @@ -1194,8 +1207,7 @@ fail: return err; } -static int platform_profile_omen_get(struct platform_profile_handler *pprof, - enum platform_profile_option *profile) +static int platform_profile_omen_get_ec(enum platform_profile_option *profile) { int tp; @@ -1223,6 +1235,27 @@ static int platform_profile_omen_get(struct platform_profile_handler *pprof, return 0; } +static int platform_profile_omen_get(struct platform_profile_handler *pprof, + enum platform_profile_option *profile) +{ + /* + * We directly return the stored platform profile, as the embedded + * controller will not accept switching to the performance option when + * the conditions are not met (e.g. the laptop is not plugged in). + * + * If we directly return what the EC reports, the platform profile will + * immediately "switch back" to normal mode, which is against the + * expected behaviour from a userspace point of view, as described in + * the Platform Profile Section page of the kernel documentation. + * + * See also omen_powersource_event. + */ + guard(mutex)(&active_platform_profile_lock); + *profile = active_platform_profile; + + return 0; +} + static bool has_omen_thermal_profile_ec_timer(void) { const char *board_name = dmi_get_system_info(DMI_BOARD_NAME); @@ -1245,8 +1278,7 @@ inline int omen_thermal_profile_ec_timer_set(u8 value) return ec_write(HP_OMEN_EC_THERMAL_PROFILE_TIMER_OFFSET, value); } -static int platform_profile_omen_set(struct platform_profile_handler *pprof, - enum platform_profile_option profile) +static int platform_profile_omen_set_ec(enum platform_profile_option profile) { int err, tp, tp_version; enum hp_thermal_profile_omen_flags flags = 0; @@ -1300,6 +1332,22 @@ static int platform_profile_omen_set(struct platform_profile_handler *pprof, return 0; } +static int platform_profile_omen_set(struct platform_profile_handler *pprof, + enum platform_profile_option profile) +{ + int err; + + guard(mutex)(&active_platform_profile_lock); + + err = platform_profile_omen_set_ec(profile); + if (err < 0) + return err; + + active_platform_profile = profile; + + return 0; +} + static int thermal_profile_get(void) { return hp_wmi_read_int(HPWMI_THERMAL_PROFILE_QUERY); @@ -1381,8 +1429,7 @@ static bool is_victus_thermal_profile(void) board_name) >= 0; } -static int platform_profile_victus_get(struct platform_profile_handler *pprof, - enum platform_profile_option *profile) +static int platform_profile_victus_get_ec(enum platform_profile_option *profile) { int tp; @@ -1407,8 +1454,14 @@ static int platform_profile_victus_get(struct platform_profile_handler *pprof, return 0; } -static int platform_profile_victus_set(struct platform_profile_handler *pprof, - enum platform_profile_option profile) +static int platform_profile_victus_get(struct platform_profile_handler *pprof, + enum platform_profile_option *profile) +{ + /* Same behaviour as platform_profile_omen_get */ + return platform_profile_omen_get(pprof, profile); +} + +static int platform_profile_victus_set_ec(enum platform_profile_option profile) { int err, tp; @@ -1433,21 +1486,113 @@ static int platform_profile_victus_set(struct platform_profile_handler *pprof, return 0; } +static int platform_profile_victus_set(struct platform_profile_handler *pprof, + enum platform_profile_option profile) +{ + int err; + + guard(mutex)(&active_platform_profile_lock); + + err = platform_profile_victus_set_ec(profile); + if (err < 0) + return err; + + active_platform_profile = profile; + + return 0; +} + +static int omen_powersource_event(struct notifier_block *nb, + unsigned long value, + void *data) +{ + struct acpi_bus_event *event_entry = data; + enum platform_profile_option actual_profile; + int err; + + if (strcmp(event_entry->device_class, ACPI_AC_CLASS) != 0) + return NOTIFY_DONE; + + pr_debug("Received power source device event\n"); + + guard(mutex)(&active_platform_profile_lock); + + /* + * This handler can only be called on Omen and Victus models, so + * there's no need to call is_victus_thermal_profile() here. + */ + if (is_omen_thermal_profile()) + err = platform_profile_omen_get_ec(&actual_profile); + else + err = platform_profile_victus_get_ec(&actual_profile); + + if (err < 0) { + /* + * Although we failed to get the current platform profile, we + * still want the other event consumers to process it. + */ + pr_warn("Failed to read current platform profile (%d)\n", err); + return NOTIFY_DONE; + } + + /* + * If we're back on AC and that the user-chosen power profile is + * different from what the EC reports, we restore the user-chosen + * one. + */ + if (power_supply_is_system_supplied() <= 0 || + active_platform_profile == actual_profile) { + pr_debug("Platform profile update skipped, conditions unmet\n"); + return NOTIFY_DONE; + } + + if (is_omen_thermal_profile()) + err = platform_profile_omen_set_ec(active_platform_profile); + else + err = platform_profile_victus_set_ec(active_platform_profile); + + if (err < 0) { + pr_warn("Failed to restore platform profile (%d)\n", err); + return NOTIFY_DONE; + } + + return NOTIFY_OK; +} + +static int omen_register_powersource_event_handler(void) +{ + int err; + + platform_power_source_nb.notifier_call = omen_powersource_event; + err = register_acpi_notifier(&platform_power_source_nb); + + if (err < 0) { + pr_warn("Failed to install ACPI power source notify handler\n"); + return err; + } + + return 0; +} + +static inline void omen_unregister_powersource_event_handler(void) +{ + unregister_acpi_notifier(&platform_power_source_nb); +} + static int thermal_profile_setup(void) { int err, tp; if (is_omen_thermal_profile()) { - tp = omen_thermal_profile_get(); - if (tp < 0) - return tp; + err = platform_profile_omen_get_ec(&active_platform_profile); + if (err < 0) + return err; /* * call thermal profile write command to ensure that the * firmware correctly sets the OEM variables */ - - err = omen_thermal_profile_set(tp); + err = platform_profile_omen_set_ec(active_platform_profile); if (err < 0) return err; @@ -1456,15 +1601,15 @@ static int thermal_profile_setup(void) set_bit(PLATFORM_PROFILE_COOL, platform_profile_handler.choices); } else if (is_victus_thermal_profile()) { - tp = omen_thermal_profile_get(); - if (tp < 0) - return tp; + err = platform_profile_victus_get_ec(&active_platform_profile); + if (err < 0) + return err; /* * call thermal profile write command to ensure that the * firmware correctly sets the OEM variables */ - err = omen_thermal_profile_set(tp); + err = platform_profile_victus_set_ec(active_platform_profile); if (err < 0) return err; @@ -1758,6 +1903,12 @@ static int __init hp_wmi_init(void) goto err_unregister_device; } + if (is_omen_thermal_profile() || is_victus_thermal_profile()) { + err = omen_register_powersource_event_handler(); + if (err) + goto err_unregister_device; + } + return 0; err_unregister_device: @@ -1772,6 +1923,9 @@ module_init(hp_wmi_init); static void __exit hp_wmi_exit(void) { + if (is_omen_thermal_profile() || is_victus_thermal_profile()) + omen_unregister_powersource_event_handler(); + if (wmi_has_guid(HPWMI_EVENT_GUID)) hp_wmi_input_destroy(); |