linux-kernel - Re: [PATCH] arch: x86: make video init optional (expert)

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Date:   Mon, 7 Dec 2020 13:57:54 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        hpa@...or.com
Subject: Re: [PATCH] arch: x86: make video init optional (expert)

On 12/7/20 1:20 PM, Enrico Weigelt, metux IT consult wrote:
> As x86 is becoming more widespread in embedded devices, that don't have
> any video adapter at all, make it possible to opt out from video init on
> bootup (expert option). Also useful for minimized paravirtualized kernels.
> 
> Most users wanna leave this enabled and shouldn't touch it, thus defaulting

             want to

> to y and hiding behind CONFIG_EXPERT.
> 
> Signed-off-by: Enrico Weigelt <info@...ux.net>
> ---
>  arch/x86/Kconfig       |  7 +++++++
>  arch/x86/boot/Makefile | 10 +++++-----
>  arch/x86/boot/main.c   |  2 ++
>  3 files changed, 14 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index fbf26e0f7a6a..43b4b2cca2b0 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -913,6 +913,13 @@ config DMI
>  	  affected by entries in the DMI blacklist. Required by PNP
>  	  BIOS code.
>  
> +config X86_BOOT_VIDEO
> +	default y
> +	bool "Setup video on boot" if EXPERT
> +	help
> +	  Enable setting video mode on boot. Say Y here unless your machine
> +	  doesn't have any video adapter. (eg. embedded systems or VMs)

	                                  (e.g., embedded systems or VMs)

> +
>  config GART_IOMMU
>  	bool "Old AMD GART IOMMU support"
>  	select DMA_OPS


-- 
~Randy