linux-kernel - Re: [PATCH v4 2/2] media: mtk-vcodec: fix build breakage when one of VPU or SCP is enabled

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Date:   Fri, 30 Oct 2020 19:18:40 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v4 2/2] media: mtk-vcodec: fix build breakage when one of
 VPU or SCP is enabled

On Tue, Oct 13, 2020 at 9:44 PM Alexandre Courbot <acourbot@...omium.org> wrote:
>
> The addition of MT8183 support added a dependency on the SCP remoteproc
> module. However the initial patch used the "select" Kconfig directive,
> which may result in the SCP module to not be compiled if remoteproc was
> disabled. In such a case, mtk-vcodec would try to link against
> non-existent SCP symbols. "select" was clearly misused here as explained
> in kconfig-language.txt.
>
> Replace this by a "depends" directive on at least one of the VPU and
> SCP modules, to allow the driver to be compiled as long as one of these
> is enabled, and adapt the code to support this new scenario.
>
> Also adapt the Kconfig text to explain the extra requirements for MT8173
> and MT8183.
>
> Reported-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Signed-off-by: Alexandre Courbot <acourbot@...omium.org>

Fixes: bf1d556ad4e0 ("media: mtk-vcodec: abstract firmware interface")