diff options
Diffstat (limited to 'drivers/platform/x86')
| -rw-r--r-- | drivers/platform/x86/toshiba_acpi.c | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c index 5378e261e2dd..73833079bac8 100644 --- a/drivers/platform/x86/toshiba_acpi.c +++ b/drivers/platform/x86/toshiba_acpi.c @@ -208,6 +208,7 @@ struct toshiba_acpi_dev { unsigned int sysfs_created:1; unsigned int special_functions; + bool kbd_event_generated; bool kbd_led_registered; bool illumination_led_registered; bool eco_led_registered; @@ -525,6 +526,7 @@ static void toshiba_kbd_illum_available(struct toshiba_acpi_dev *dev) dev->kbd_illum_supported = 0; dev->kbd_led_registered = false; + dev->kbd_event_generated = false; if (!sci_open(dev)) return; @@ -1642,6 +1644,11 @@ static const struct backlight_ops toshiba_backlight_data = { .update_status = set_lcd_status, }; +/* Keyboard backlight work */ +static void toshiba_acpi_kbd_bl_work(struct work_struct *work); + +static DECLARE_WORK(kbd_bl_work, toshiba_acpi_kbd_bl_work); + /* * Sysfs files */ @@ -1741,6 +1748,24 @@ static ssize_t kbd_backlight_mode_store(struct device *dev, return ret; toshiba->kbd_mode = mode; + + /* + * Some laptop models with the second generation backlit + * keyboard (type 2) do not generate the keyboard backlight + * changed event (0x92), and thus, the driver will never update + * the sysfs entries. + * + * The event is generated right when changing the keyboard + * backlight mode and the *notify function will set the + * kbd_event_generated to true. + * + * In case the event is not generated, schedule the keyboard + * backlight work to update the sysfs entries and emulate the + * event via genetlink. + */ + if (toshiba->kbd_type == 2 && + !toshiba_acpi->kbd_event_generated) + schedule_work(&kbd_bl_work); } return count; @@ -2273,6 +2298,21 @@ static struct attribute_group toshiba_attr_group = { .attrs = toshiba_attributes, }; +static void toshiba_acpi_kbd_bl_work(struct work_struct *work) +{ + struct acpi_device *acpi_dev = toshiba_acpi->acpi_dev; + + /* Update the sysfs entries */ + if (sysfs_update_group(&acpi_dev->dev.kobj, + &toshiba_attr_group)) + pr_err("Unable to update sysfs entries\n"); + + /* Emulate the keyboard backlight event */ + acpi_bus_generate_netlink_event(acpi_dev->pnp.device_class, + dev_name(&acpi_dev->dev), + 0x92, 0); +} + /* * Misc device */ @@ -2947,7 +2987,6 @@ error: static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event) { struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev); - int ret; switch (event) { case 0x80: /* Hotkeys and some system events */ @@ -2977,10 +3016,10 @@ static void toshiba_acpi_notify(struct acpi_device *acpi_dev, u32 event) pr_info("SATA power event received %x\n", event); break; case 0x92: /* Keyboard backlight mode changed */ + toshiba_acpi->kbd_event_generated = true; /* Update sysfs entries */ - ret = sysfs_update_group(&acpi_dev->dev.kobj, - &toshiba_attr_group); - if (ret) + if (sysfs_update_group(&acpi_dev->dev.kobj, + &toshiba_attr_group)) pr_err("Unable to update sysfs entries\n"); break; case 0x85: /* Unknown */ |