diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/asus-laptop.c | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c index ea51d7e4df21..d726db380e47 100644 --- a/drivers/platform/x86/asus-laptop.c +++ b/drivers/platform/x86/asus-laptop.c @@ -241,6 +241,7 @@ struct asus_laptop { int wireless_status; bool have_rsts; + int lcd_state; acpi_handle handle; /* the handle of the hotk device */ char status; /* status of the hotk, for LEDs, ... */ @@ -538,30 +539,33 @@ error: /* * Backlight device */ -static int get_lcd_state(struct asus_laptop *asus) +static int asus_lcd_status(struct asus_laptop *asus) { - return read_status(asus, LCD_ON); + return asus->lcd_state; } -static int set_lcd_state(struct asus_laptop *asus, int value) +static int asus_lcd_set(struct asus_laptop *asus, int value) { int lcd = 0; acpi_status status = 0; - lcd = value ? 1 : 0; + lcd = !!value; - if (lcd == get_lcd_state(asus)) + if (lcd == asus_lcd_status(asus)) return 0; - if (lcd_switch_handle) { - status = acpi_evaluate_object(lcd_switch_handle, - NULL, NULL, NULL); + if (!lcd_switch_handle) + return -ENODEV; + + status = acpi_evaluate_object(lcd_switch_handle, + NULL, NULL, NULL); - if (ACPI_FAILURE(status)) - pr_warning("Error switching LCD\n"); + if (ACPI_FAILURE(status)) { + pr_warning("Error switching LCD\n"); + return -ENODEV; } - write_status(asus, NULL, lcd, LCD_ON); + asus->lcd_state = lcd; return 0; } @@ -569,6 +573,8 @@ static void lcd_blank(struct asus_laptop *asus, int blank) { struct backlight_device *bd = asus->backlight_device; + asus->lcd_state = (blank == FB_BLANK_UNBLANK); + if (bd) { bd->props.power = blank; backlight_update_status(bd); @@ -607,7 +613,7 @@ static int update_bl_status(struct backlight_device *bd) return rv; value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; - return set_lcd_state(asus, value); + return asus_lcd_set(asus, value); } static struct backlight_ops asusbl_ops = { @@ -1144,13 +1150,10 @@ static void asus_acpi_notify(struct acpi_device *device, u32 event) * We need to tell the backlight device when the backlight power is * switched */ - if (event == ATKD_LCD_ON) { - write_status(asus, NULL, 1, LCD_ON); + if (event == ATKD_LCD_ON) lcd_blank(asus, FB_BLANK_UNBLANK); - } else if (event == ATKD_LCD_OFF) { - write_status(asus, NULL, 0, LCD_ON); + else if (event == ATKD_LCD_OFF) lcd_blank(asus, FB_BLANK_POWERDOWN); - } /* TODO Find a better way to handle events count. */ count = asus->event_count[event % 128]++; |