APPLIED: [PATCH v2 0/8][SRU][N] Dell AIO backlight is not working, dell_uart_backlight module is missing

[Stefan Bader]

On 23/10/2025 04:53, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/2083800
> 
> [Impact]
> Dell AIO backlight need dell_uart_backlight module, but
> CONFIG_DELL_UART_BACKLIGHT is not enabled on 6.8.
> 
> [Fix]
> Enable the option in the kernel config, and also replace the old sauce
> driver with the upstream one.
> 
> [Test Case]
> 1. Boot Dell AIO machine to desktop
> 2. The backlight should be controlled through hotkey and/or GUI
> 
> [Where problems could occur]
> This series of patches replace the sauce driver with the upstream one.
> The functionality is the same.
> 
> v2. add all quirks for dell aio
>     5c7bb62cb8f5 ACPI: video: Add backlight=native quirk for Dell OptiPlex 7760 AIO
>     ac78288fe062 ACPI: video: Add backlight=native quirk for Dell OptiPlex 5480 AIO
> 
> Chia-Lin Kao (AceLan) (4):
>    UBUNTU: SAUCE: Removed sauce dell-uart-backlight driver
>    Revert "UBUNTU: SAUCE: ACPI: video: Dell AIO UART backlight detection"
>    UBUNTU: SAUCE: dell_uart_backlight: size_t -> ssize_t
>    UBUNTU: [Config] enable CONFIG_DELL_UART_BACKLIGHT
> 
> Hans de Goede (4):
>    platform/x86: Add new Dell UART backlight driver
>    ACPI: video: Add Dell UART backlight controller detection
>    ACPI: video: Add backlight=native quirk for Dell OptiPlex 7760 AIO
>    ACPI: video: Add backlight=native quirk for Dell OptiPlex 5480 AIO
> 
>   debian.master/config/annotations              |   2 +-
>   drivers/acpi/video_detect.c                   |  34 +-
>   drivers/platform/x86/dell/Kconfig             |  15 +
>   .../platform/x86/dell/dell-uart-backlight.c   | 730 ++++++++----------
>   .../platform/x86/dell/dell-uart-backlight.h   |  41 -
>   include/acpi/video.h                          |   1 +
>   6 files changed, 348 insertions(+), 475 deletions(-)
>   delete mode 100644 drivers/platform/x86/dell/dell-uart-backlight.h
> 

The first patch did not apply to current tip of the noble tree. But 
since it is just removing two files I just did that in my local repo. 
The rest was not a problem.

Applied to noble:linux/master-next. Thanks.

-Stefan

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