K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2020-05-26T05:54:00.157521Z
K 7
svn:log
V 439
MFC r360657: acpi_video: support systems without non-essential methods

Only _BCL and _BCM methods seem to be essential to the driver's
operation.  If _BQC is missing then we can assume that the current
brightness is whatever we set by the last _BCM invocation.  If _DCS or
_DGS is missing then we can make assumptions as well.

The change is based on a patch suggested by Anthony Jenkins
<Scoobi_doo@yahoo.com> in PR 207086.

PR:		207086

END