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authorZhang Rui <rui.zhang@intel.com>2016-11-29 23:19:46 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-11-29 23:19:46 +0100
commit7020bcb82838006e23d058ff07b063b393ed3f10 (patch)
treed658040515fe0b5161dc4d0e6b36fc2c2e2db868 /drivers/acpi/scan.c
parente5517c2a5a49ed5e99047008629f1cd60246ea0e (diff)
downloadlinux-7020bcb82838006e23d058ff07b063b393ed3f10.tar.bz2
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/scan.c')
-rw-r--r--drivers/acpi/scan.c3
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;
}