[PATCH 0/4][SRU][B][D][E][OEM-B][OEM-OSP1-B] Can't adjust brightness on

[AceLan Kao]

BugLink: https://bugs.launchpad.net/bugs/1813877

[Impact]
The dell-uart-backlight driver has been loaded, but the backlight is
controller by graphics driver instead of scalar IC. The old way to
determinate weather the driver should be loaded is not working anymore,
since the behavior of scalar command, show firmware version, is not the
same as old platforms.

[Fix]
Using more a reliable command, get_scalar_status, to check if scalar is in
charge of the AIO backlight.
For the old platforms which don't have the new command, I add a list to
list them all and use the old way to determinate the scalar IC.

[Test]
Verified on old and new Dell AIO platforms.

[Regression Potential]
Low. The quirk lists all old platforms which use the old way to check if
scalar IC is in use. So, it won't change the behavior on old platforms,
and apply the new method on new platforms.

AceLan Kao (4):
  UBUNTU: SAUCE: platform/x86: dell-uart-backlight: add missing status
    command
  UBUNTU: SAUCE: platform/x86: dell-uart-backlight: load driver by
    scalar status
  UBUNTU: SAUCE: platform/x86: dell-uart-backlight: add force parameter
  UBUNTU: SAUCE: platform/x86: dell-uart-backlight: add quirk for old
    platforms

 drivers/platform/x86/dell-uart-backlight.c | 73 +++++++++++++++++++---
 1 file changed, 64 insertions(+), 9 deletions(-)

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2.17.1