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Merge branch 'bugzilla-12249' into release

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This commit is contained in:
Len Brown 2009-04-24 01:35:46 -04:00
commit 2d40570786
1 changed files with 21 additions and 20 deletions
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41
drivers/acpi/video.c
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@ -809,12 +809,19 @@ acpi_video_init_brightness(struct acpi_video_device *device)
br->flags._BCM_use_index = br->flags._BCL_use_index; br->flags._BCM_use_index = br->flags._BCL_use_index;
/* _BQC uses INDEX while _BCL uses VALUE in some laptops */ /* _BQC uses INDEX while _BCL uses VALUE in some laptops */
br->curr = max_level; br->curr = level_old = max_level;
if (!device->cap._BQC)
goto set_level;
result = acpi_video_device_lcd_get_level_current(device, &level_old); result = acpi_video_device_lcd_get_level_current(device, &level_old);
if (result) if (result)
goto out_free_levels; goto out_free_levels;
result = acpi_video_device_lcd_set_level(device, br->curr); /*
* Set the level to maximum and check if _BQC uses indexed value
*/
result = acpi_video_device_lcd_set_level(device, max_level);
if (result) if (result)
goto out_free_levels; goto out_free_levels;
@ -822,25 +829,19 @@ acpi_video_init_brightness(struct acpi_video_device *device)
if (result) if (result)
goto out_free_levels; goto out_free_levels;
if ((level != level_old) && !br->flags._BCM_use_index) { br->flags._BQC_use_index = (level == max_level ? 0 : 1);
/* Note:
* This piece of code does not work correctly if the current
* brightness levels is 0.
* But I guess boxes that boot with such a dark screen are rare
* and no more code is needed to cover this specifial case.
*/
if (level_ac_battery != 2) { if (!br->flags._BQC_use_index)
/* goto set_level;
* For now, we don't support the _BCL like this:
* 16, 15, 0, 1, 2, 3, ..., 14, 15, 16 if (br->flags._BCL_reversed)
* because we may mess up the index returned by _BQC. level_old = (br->count - 1) - level_old;
* Plus: we have not got a box like this. level_old = br->levels[level_old];
*/
ACPI_ERROR((AE_INFO, "_BCL not supported\n")); set_level:
} result = acpi_video_device_lcd_set_level(device, level_old);
br->flags._BQC_use_index = 1; if (result)
} goto out_free_levels;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"found %d brightness levels\n", count - 2)); "found %d brightness levels\n", count - 2));