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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2009-12-09 01:36:24 +0000 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-09 15:45:30 -0500 |
| commit | 347a26860e2293b1347996876d3550499c7bb31f (patch) | |
| tree | edd7781ecd31f9771b8adf4458eecdd6ed0e9607 /drivers/platform | |
| parent | 90765c6aee568137521ba19347c744b5abde8161 (diff) | |
| download | kernel_samsung_smdk4412-347a26860e2293b1347996876d3550499c7bb31f.zip kernel_samsung_smdk4412-347a26860e2293b1347996876d3550499c7bb31f.tar.gz kernel_samsung_smdk4412-347a26860e2293b1347996876d3550499c7bb31f.tar.bz2 | |
thinkpad-acpi: issue backlight class events
Take advantage of the new events capabilities of the backlight class to
notify userspace of backlight changes.
This depends on "backlight: Allow drivers to update the core, and
generate events on changes", by Matthew Garrett.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Richard Purdie <rpurdie@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 6160813..4406136 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -22,7 +22,7 @@ */ #define TPACPI_VERSION "0.23" -#define TPACPI_SYSFS_VERSION 0x020500 +#define TPACPI_SYSFS_VERSION 0x020600 /* * Changelog: @@ -6073,6 +6073,12 @@ static int brightness_get(struct backlight_device *bd) return status & TP_EC_BACKLIGHT_LVLMSK; } +static void tpacpi_brightness_notify_change(void) +{ + backlight_force_update(ibm_backlight_device, + BACKLIGHT_UPDATE_HOTKEY); +} + static struct backlight_ops ibm_backlight_data = { .get_brightness = brightness_get, .update_status = brightness_update_status, @@ -6227,6 +6233,12 @@ static int __init brightness_init(struct ibm_init_struct *iibm) ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; backlight_update_status(ibm_backlight_device); + vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, + "brightness: registering brightness hotkeys " + "as change notification\n"); + tpacpi_hotkey_driver_mask_set(hotkey_driver_mask + | TP_ACPI_HKEY_BRGHTUP_MASK + | TP_ACPI_HKEY_BRGHTDWN_MASK);; return 0; } @@ -6303,6 +6315,9 @@ static int brightness_write(char *buf) * Doing it this way makes the syscall restartable in case of EINTR */ rc = brightness_set(level); + if (!rc && ibm_backlight_device) + backlight_force_update(ibm_backlight_device, + BACKLIGHT_UPDATE_SYSFS); return (rc == -EINTR)? -ERESTARTSYS : rc; } @@ -7702,6 +7717,13 @@ static struct ibm_struct fan_driver_data = { */ static void tpacpi_driver_event(const unsigned int hkey_event) { + if (ibm_backlight_device) { + switch (hkey_event) { + case TP_HKEY_EV_BRGHT_UP: + case TP_HKEY_EV_BRGHT_DOWN: + tpacpi_brightness_notify_change(); + } + } } |