Re: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION

[Randy Dunlap]

On 8/4/23 05:51, Javier Martinez Canillas wrote:
> The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
> emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
> to an effective 'select FB_CORE', so any config that previously had DRM=y
> and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.
> 
> This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
> as reported by Arthur Grillo, e.g:
> 
> WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
>   Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
>   Selected by [y]:
>   - DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]
> 
> Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
> DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
> be to enable DRM fbdev emulation but without a framebuffer console.
> 
> Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
> Reported-by: Arthur Grillo <arthurgrillo@xxxxxxxxxx>
> Closes: https://lore.kernel.org/dri-devel/20230726220325.278976-1-arthurgrillo@xxxxxxxxxx
> Suggested-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>

Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Tested-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> # build-tested

Thanks.

> ---
> 
>  drivers/gpu/drm/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index b51c6a141dfa..2a44b9419d4d 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -135,7 +135,6 @@ config DRM_DEBUG_MODESET_LOCK
>  config DRM_FBDEV_EMULATION
>  	bool "Enable legacy fbdev support for your modesetting driver"
>  	depends on DRM
> -	select FRAMEBUFFER_CONSOLE if !EXPERT
>  	select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
>  	default y
>  	help

-- 
~Randy