diff options
| -rw-r--r-- | drivers/acpi/video.c | 43 |
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index f8a28b39b88a..387b3705279a 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -222,7 +222,7 @@ static int acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level); static int acpi_video_device_lcd_get_level_current( struct acpi_video_device *device, - unsigned long long *level, int init); + unsigned long long *level, bool raw); static int acpi_video_get_next_level(struct acpi_video_device *device, u32 level_current, u32 event); static int acpi_video_switch_brightness(struct acpi_video_device *device, @@ -236,7 +236,7 @@ static int acpi_video_get_brightness(struct backlight_device *bd) struct acpi_video_device *vd = (struct acpi_video_device *)bl_get_data(bd); - if (acpi_video_device_lcd_get_level_current(vd, &cur_level, 0)) + if (acpi_video_device_lcd_get_level_current(vd, &cur_level, false)) return -EINVAL; for (i = 2; i < vd->brightness->count; i++) { if (vd->brightness->levels[i] == cur_level) @@ -281,7 +281,7 @@ static int video_get_cur_state(struct thermal_cooling_device *cooling_dev, unsig unsigned long long level; int offset; - if (acpi_video_device_lcd_get_level_current(video, &level, 0)) + if (acpi_video_device_lcd_get_level_current(video, &level, false)) return -EINVAL; for (offset = 2; offset < video->brightness->count; offset++) if (level == video->brightness->levels[offset]) { @@ -460,7 +460,7 @@ static struct dmi_system_id video_dmi_table[] __initdata = { static int acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, - unsigned long long *level, int init) + unsigned long long *level, bool raw) { acpi_status status = AE_OK; int i; @@ -471,6 +471,15 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, status = acpi_evaluate_integer(device->dev->handle, buf, NULL, level); if (ACPI_SUCCESS(status)) { + if (raw) { + /* + * Caller has indicated he wants the raw + * value returned by _BQC, so don't furtherly + * mess with the value. + */ + return 0; + } + if (device->brightness->flags._BQC_use_index) { if (device->brightness->flags._BCL_reversed) *level = device->brightness->count @@ -484,16 +493,14 @@ acpi_video_device_lcd_get_level_current(struct acpi_video_device *device, device->brightness->curr = *level; return 0; } - if (!init) { - /* - * BQC returned an invalid level. - * Stop using it. - */ - ACPI_WARNING((AE_INFO, - "%s returned an invalid level", - buf)); - device->cap._BQC = device->cap._BCQ = 0; - } + /* + * BQC returned an invalid level. + * Stop using it. + */ + ACPI_WARNING((AE_INFO, + "%s returned an invalid level", + buf)); + device->cap._BQC = device->cap._BCQ = 0; } else { /* Fixme: * should we return an error or ignore this failure? @@ -711,7 +718,8 @@ acpi_video_init_brightness(struct acpi_video_device *device) if (!device->cap._BQC) goto set_level; - result = acpi_video_device_lcd_get_level_current(device, &level_old, 1); + result = acpi_video_device_lcd_get_level_current(device, + &level_old, true); if (result) goto out_free_levels; @@ -722,7 +730,7 @@ acpi_video_init_brightness(struct acpi_video_device *device) if (result) goto out_free_levels; - result = acpi_video_device_lcd_get_level_current(device, &level, 0); + result = acpi_video_device_lcd_get_level_current(device, &level, true); if (result) goto out_free_levels; @@ -1276,7 +1284,8 @@ acpi_video_switch_brightness(struct acpi_video_device *device, int event) goto out; result = acpi_video_device_lcd_get_level_current(device, - &level_current, 0); + &level_current, + false); if (result) goto out; |