Re: [PATCH 2/3] ACPI/DRM: rework ACPI_VIDEO Kconfig dependencies

[Rafael J. Wysocki]

On Wednesday, July 26, 2017 03:53:11 PM Arnd Bergmann wrote:
> ACPI_VIDEO keeps causing problems with circular Kconfig dependencies,
> as it depends on a couple of other symbols, and it gets selected by
> drivers that may end up being depending on others.
> 
> This is an attempt to simplify this by changing all drivers that
> currently 'select ACPI_VIDEO' to use 'depends on'. This by itself
> simplifies the dependency lists for the other drivers. We make
> ACPI_VIDEO 'default y' to avoid having it turned off for 'make
> oldconfig' users. This should again be fine as x86 users will
> normally want this enabled and the option is not available elsewhere.
> 
> I'm moving the 'select BACKLIGHT_CLASS_DEVICE/BACKLIGHT_LCD_SUPPORT'
> into ACPI_VIDEO as a further simplification, those were already
> selected by anything that selected ACPI_VIDEO before.
> 
> Changing the INPUT dependency in ACPI_CMPC is necessary to avoid a
> circular dependency with X86_PLATFORM_DEVICES/NOUVEAU.
> 
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/acpi/Kconfig            |  5 ++++-
>  drivers/gpu/drm/gma500/Kconfig  |  6 +-----
>  drivers/gpu/drm/i915/Kconfig    |  7 +------
>  drivers/gpu/drm/nouveau/Kconfig | 10 ++--------
>  drivers/platform/x86/Kconfig    |  6 ++----
>  5 files changed, 10 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 1ce52f84dc23..a8f5a40e2914 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -182,9 +182,12 @@ config ACPI_BUTTON
>  
>  config ACPI_VIDEO
>  	tristate "Video"
> -	depends on X86 && BACKLIGHT_CLASS_DEVICE
> +	depends on X86
>  	depends on INPUT
>  	select THERMAL
> +	select BACKLIGHT_CLASS_DEVICE
> +	select BACKLIGHT_LCD_SUPPORT
> +	default y
>  	help
>  	  This driver implements the ACPI Extensions For Display Adapters
>  	  for integrated graphics devices on motherboard, as specified in

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

for the ACPI_VIDEO changes.

Thanks,
Rafael