linux-kernel - Re: [PATCH] drm: msm: fix building without CONFIG_COMMON

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Date:   Fri, 15 Oct 2021 08:20:31 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Arnd Bergmann <arnd@...nel.org>, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Arnd Bergmann <arnd@...db.de>,
        Randy Dunlap <rdunlap@...radead.org>,
        Alex Elder <elder@...aro.org>,
        Christian König <christian.koenig@....com>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Rajeev Nandan <rajeevny@...eaurora.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        freedreno@...ts.freedesktop.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm: msm: fix building without CONFIG_COMMON_CLK

Hi Dmitry,

On Fri, Oct 15, 2021 at 2:26 AM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
> On 13/10/2021 17:42, Arnd Bergmann wrote:
> > From: Arnd Bergmann <arnd@...db.de>
> >
> > When CONFIG_COMMON_CLOCK is disabled, the 8996 specific
> > phy code is left out, which results in a link failure:
> >
> > ld: drivers/gpu/drm/msm/hdmi/hdmi_phy.o:(.rodata+0x3f0): undefined reference to `msm_hdmi_phy_8996_cfg'
> >
> > This was only exposed after it became possible to build
> > test the driver without the clock interfaces.
> >
> > Make COMMON_CLK a hard dependency for compile testing,
> > and simplify it a little based on that.
> >
> > Fixes: b3ed524f84f5 ("drm/msm: allow compile_test on !ARM")
> > Reported-by: Randy Dunlap <rdunlap@...radead.org>
> > Suggested-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
>
> This drops dependency on CONFIG_OF. While ARM64 selects OF, pure ARM
> does not.

But SOC_IMX5 depends on ARCH_MULTI_V7, which depends on
ARCH_MULTIPLATFORM, which selects USE_OF, which selects OF.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds