linux-kernel - Re: [PATCH -next] drm/panel: Fix build error when CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20=y && CONFIG_DRM_DISPLAY

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Message-ID: <CAD=FV=VVZo+wsR0yPLvq-8jkZg12+Sw0NM0TkgQLHDCxCiFdGw@mail.gmail.com>
Date:   Mon, 23 May 2022 09:47:32 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     gaochao <gaochao49@...wei.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sean Paul <seanpaul@...omium.org>, zhengbin13@...wei.com,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] drm/panel: Fix build error when CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20=y
 && CONFIG_DRM_DISPLAY_HELPER=m

Hi,

On Mon, May 23, 2022 at 1:58 AM gaochao <gaochao49@...wei.com> wrote:
>
> If CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20=y && CONFIG_DRM_DISPLAY_HELPER=m,
> bulding fails:
>
> drivers/gpu/drm/panel/panel-samsung-atna33xc20.o: In function `atana33xc20_probe':
> panel-samsung-atna33xc20.c:(.text+0x744): undefined reference to
>  `drm_panel_dp_aux_backlight'
> make: *** [vmlinux] Error 1
>
> Let CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20 select DRM_DISPLAY_DP_HELPER and
> CONFIG_DRM_DISPLAY_HELPER to fix this error.
>
> Fixes: 32ce3b320343 ("drm/panel: atna33xc20: Introduce the Samsung ATNA33XC20 panel")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: gaochao <gaochao49@...wei.com>

I think the author / Signed-off-by are supposed to be real names. Is
"gaochao" your legal name?

> ---
>  drivers/gpu/drm/panel/Kconfig | 2 ++
>  1 file changed, 2 insertions(+)

Other than the Signed-off-by / Author issue:

Reviewed-by: Douglas Anderson <dianders@...omium.org>