Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20210603215819.3904733-1-keescook@chromium.org>
In-Reply-To: <20210603215819.3904733-1-keescook@chromium.org>
From:   Daniel Vetter <daniel@ffwll.ch>
Date:   Fri, 4 Jun 2021 00:28:09 +0200
Message-ID: <CAKMK7uGbGSw-hDSq7+RM-LzdKeNcaf1Fn6SRfo=4WMJPXyA7rg@mail.gmail.com>
Subject: Re: [PATCH] drm/pl111: Actually fix CONFIG_VEXPRESS_CONFIG depends
To:     Kees Cook <keescook@chromium.org>
Cc:     Emma Anholt <emma@anholt.net>, David Airlie <airlied@linux.ie>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        Rob Herring <robh@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, Jun 3, 2021 at 11:58 PM Kees Cook <keescook@chromium.org> wrote:
>
> VEXPRESS_CONFIG needs to either be missing, built-in, or modular when
> pl111 is modular. Update the Kconfig to reflect the need.
>
> Cc: Emma Anholt <emma@anholt.net>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: dri-devel@lists.freedesktop.org
> Fixes: 4dc7c97d04dc ("drm/pl111: depend on CONFIG_VEXPRESS_CONFIG")
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
>  drivers/gpu/drm/pl111/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/pl111/Kconfig b/drivers/gpu/drm/pl111/Kconfig
> index c5210a5bef1b..b84879ca430d 100644
> --- a/drivers/gpu/drm/pl111/Kconfig
> +++ b/drivers/gpu/drm/pl111/Kconfig
> @@ -2,7 +2,8 @@
>  config DRM_PL111
>         tristate "DRM Support for PL111 CLCD Controller"
>         depends on DRM
> -       depends on VEXPRESS_CONFIG
> +       depends on ARM || ARM64 || COMPILE_TEST
> +       depends on !VEXPRESS_CONFIG || VEXPRESS_CONFIG=DRM

Hm I thought the canonical way to express optional depdencies was


>         depends on COMMON_CLK
>         select DRM_KMS_HELPER
>         select DRM_KMS_CMA_HELPER
> --
> 2.25.1
>


-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch