diff options
| author | Zhang Rui <rui.zhang@intel.com> | 2016-11-29 23:19:46 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-11-29 23:19:46 +0100 |
| commit | 7020bcb82838006e23d058ff07b063b393ed3f10 (patch) | |
| tree | d658040515fe0b5161dc4d0e6b36fc2c2e2db868 /drivers/acpi | |
| parent | Linux 4.9-rc7 (diff) | |
| download | linux-7020bcb82838006e23d058ff07b063b393ed3f10.tar.xz linux-7020bcb82838006e23d058ff07b063b393ed3f10.zip | |
ACPI: do not warn if _BQC does not exist
Starting from ACPI spec 3.0, it's only clarified that _BCM control
method is required if _BCL is implemented. There is no word
saying _BQC is required.
And in ACPI spec 6.1 B.5.4, for _BQC, it is explicitly stated that
"This optional method returns the current brightness level of a
built-in display output device. If present, it must be set by
the platform for initial brightness."
Thus remove the obsolete warning message.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/scan.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 3d1856f1f4d0..07aa2e649eb1 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1119,9 +1119,6 @@ acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight " "support\n")); *cap |= ACPI_VIDEO_BACKLIGHT; - if (!acpi_has_method(handle, "_BQC")) - printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, " - "cannot determine initial brightness\n"); /* We have backlight support, no need to scan further */ return AE_CTRL_TERMINATE; } |