diff options
| -rw-r--r-- | drivers/platform/x86/asus-wmi.c | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c index fd5b08eecf1e..adf7b05c9aef 100644 --- a/drivers/platform/x86/asus-wmi.c +++ b/drivers/platform/x86/asus-wmi.c @@ -765,9 +765,8 @@ static int read_backlight_power(struct asus_wmi *asus) return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; } -static int read_brightness(struct backlight_device *bd) +static int read_brightness_max(struct asus_wmi *asus) { - struct asus_wmi *asus = bl_get_data(bd); u32 retval; int err; @@ -776,6 +775,25 @@ static int read_brightness(struct backlight_device *bd) if (err < 0) return err; + retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK; + retval >>= 8; + + if (!retval) + return -ENODEV; + + return retval; +} + +static int read_brightness(struct backlight_device *bd) +{ + struct asus_wmi *asus = bl_get_data(bd); + u32 retval, err; + + err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); + + if (err < 0) + return err; + return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK; } @@ -799,7 +817,7 @@ static int update_bl_status(struct backlight_device *bd) err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, ctrl_param, NULL); } - return 0; + return err; } static const struct backlight_ops asus_wmi_bl_ops = { @@ -832,23 +850,19 @@ static int asus_wmi_backlight_init(struct asus_wmi *asus) int max; int power; - max = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_BRIGHTNESS, - ASUS_WMI_DSTS_MAX_BRIGTH_MASK); - power = read_backlight_power(asus); + max = read_brightness_max(asus); - if (max < 0 && power < 0) { - /* Try to keep the original error */ - if (max == -ENODEV && power == -ENODEV) - return -ENODEV; - if (max != -ENODEV) - return max; - else - return power; - } if (max == -ENODEV) max = 0; + else if (max < 0) + return max; + + power = read_backlight_power(asus); + if (power == -ENODEV) power = FB_BLANK_UNBLANK; + else if (power < 0) + return power; memset(&props, 0, sizeof(struct backlight_properties)); props.max_brightness = max; |