linux-kernel - Re: [PATCH] mtd: MTD_INTEL_DG should depend on DRM_I915 or DRM

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Message-ID: <d947168fd02d6f820159b456099e6aa8f465b633@intel.com>
Date: Wed, 30 Jul 2025 13:32:07 +0300
From: Jani Nikula <jani.nikula@...ux.intel.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>, Miquel Raynal
 <miquel.raynal@...tlin.com>, Richard Weinberger <richard@....at>, Vignesh
 Raghavendra <vigneshr@...com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
 Tomas Winkler <tomasw@...il.com>, Alexander Usyskin
 <alexander.usyskin@...el.com>, Raag Jadav <raag.jadav@...el.com>
Cc: linux-mtd@...ts.infradead.org, intel-gfx@...ts.freedesktop.org,
 intel-xe@...ts.freedesktop.org, linux-kernel@...r.kernel.org, Geert
 Uytterhoeven <geert+renesas@...der.be>
Subject: Re: [PATCH] mtd: MTD_INTEL_DG should depend on DRM_I915 or DRM_XE

On Wed, 30 Jul 2025, Geert Uytterhoeven <geert+renesas@...der.be> wrote:
> Intel Discrete Graphics non-volatile memory is onlt present on intel
> discrete graphics devices, and its auxiliary device is instantiated by
> the Intel i915 and Xe2 DRM drivers.  Hence add dependencies on DRM_I915
> and DRM_XE, to prevent asking the user about this driver when
> configuring a kernel without Intel graphics support.
>
> Fixes: ceb5ab3cb6463795 ("mtd: add driver for intel graphics non-volatile memory device")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
>  drivers/mtd/devices/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
> index 46cebde79f34b0b7..f0ab74d695347117 100644
> --- a/drivers/mtd/devices/Kconfig
> +++ b/drivers/mtd/devices/Kconfig
> @@ -185,8 +185,8 @@ config MTD_POWERNV_FLASH
>  
>  config MTD_INTEL_DG
>  	tristate "Intel Discrete Graphics non-volatile memory driver"
> -	depends on AUXILIARY_BUS
> -	depends on MTD
> +	depends on AUXILIARY_BUS && MTD
> +	depends on DRM_I915 || DRM_XE || COMPILE_TEST

I understand the intent, but IIUC auxiliary bus usage should not require
a "depends on" relationship. Couldn't you have MTD_INTEL_DG=y and
DRM_I915=m just fine?

BR,
Jani.


>  	help
>  	  This provides an MTD device to access Intel Discrete Graphics
>  	  non-volatile memory.

-- 
Jani Nikula, Intel