ACK/Cmnt: [PATCH 0/1][SRU][B/E/F/Unstable] Stop using get_scalar_status

Stefan Bader stefan.bader at
Fri Mar 13 09:55:24 UTC 2020

On 11.03.20 15:00, AceLan Kao wrote:
> BugLink:
> [Impact]
> The get_scalar_status command was provided by ODM engineer and was newly
> introduced to determinate whether scalar is responsible for the backlight
> adjustment. That guy asked the scalar vendor to add this command and the
> command works as expected. But there is already a command in the Dell AIO
> scalar UART command spec. which can do the same thing since 2015, and the
> newly introduced get_scalar_status command is undocumented. To prevent
> from introducing regression in the future and to align with what Windows
> uses, replace this command with get_display_mode command.
> [Fix]
> Replace get_scalar_status command with get_display_mode command.
> [Test]
> Verified on new Dell AIO platforms.
> [Regression Potential]
> Low, the command is already in the spec. since 2015.
> AceLan Kao (1):
>   UBUNTU: SAUCE: platform/x86: dell-uart-backlight: add get_display_mode
>     command
>  drivers/platform/x86/dell-uart-backlight.c | 91 +++++++++++-----------
>  drivers/platform/x86/dell-uart-backlight.h |  7 +-
>  2 files changed, 52 insertions(+), 46 deletions(-)
When is this thing going upstream? It seems to be a burden since Bionic and
there is no sign of it even in linux-next! For now...

Acked-by: Stefan Bader <stefan.bader at>

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