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References: <20211202062733.20338-1-moudy.ho@mediatek.com> <20211202062733.20338-4-moudy.ho@mediatek.com>
 <c48154b9-b202-c47c-c27e-53aa97877430@xs4all.nl>
In-Reply-To: <c48154b9-b202-c47c-c27e-53aa97877430@xs4all.nl>
From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Tue, 7 Dec 2021 15:33:47 +0100
Message-ID: <CAMuHMdVDQMUcYSnvPj=TOepSbgSj7fO7oxd9QvQBDSttpVz=ew@mail.gmail.com>
Subject: Re: [PATCH v10 3/3] media: platform: mtk-mdp3: add Mediatek MDP3 driver
To:     Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc:     Moudy Ho <moudy.ho@mediatek.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Rob Landley <rob@landley.net>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Linux Media Mailing List <linux-media@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linux-mediatek@lists.infradead.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Alexandre Courbot <acourbot@chromium.org>,
        Tomasz Figa <tfiga@chromium.org>, drinkcat@chromium.org,
        pihsun@chromium.org, hsinyi@google.com,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Maoguang Meng <maoguang.meng@mediatek.com>,
        daoyuan huang <daoyuan.huang@mediatek.com>,
        Ping-Hsun Wu <ping-hsun.wu@mediatek.com>,
        menghui.lin@mediatek.com, sj.huang@mediatek.com,
        allen-kh.cheng@mediatek.com, randy.wu@mediatek.com,
        jason-jh.lin@mediatek.com, roy-cw.yeh@mediatek.com,
        river.cheng@mediatek.com, srv_heupstream@mediatek.com
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Precedence: bulk

Hi Hans,

On Tue, Dec 7, 2021 at 3:20 PM Hans Verkuil <hverkuil-cisco@xs4all.nl> wrote:
> On 12/2/21 7:27 AM, Moudy Ho wrote:
> > This patch adds driver for Mediatek's Media Data Path ver.3 (MDP3).
> > It provides the following functions:
> >   color transform, format conversion, resize, crop, rotate, flip
> >   and additional image quality enhancement.
> >
> > The MDP3 driver is mainly used for Google Chromebook products to
> > import the new architecture to set the HW settings as shown below:
> >   User -> V4L2 framework
> >     -> MDP3 driver -> SCP (setting calculations)
> >       -> MDP3 driver -> CMDQ (GCE driver) -> HW
> >
> > Each modules' related operation control is sited in mtk-mdp3-comp.c
> > Each modules' register table is defined in file with "mdp_reg_" prefix
> > GCE related API, operation control  sited in mtk-mdp3-cmdq.c
> > V4L2 m2m device functions are implemented in mtk-mdp3-m2m.c
> > Probe, power, suspend/resume, system level functions are defined in
> > mtk-mdp3-core.c
> >
> > Signed-off-by: Ping-Hsun Wu <ping-hsun.wu@mediatek.com>
> > Signed-off-by: daoyuan huang <daoyuan.huang@mediatek.com>
> > Signed-off-by: Moudy Ho <moudy.ho@mediatek.com>
> > Reported-by: kernel test robot <lkp@intel.com>
> > ---
> >  drivers/media/platform/Kconfig                |   19 +
> >  drivers/media/platform/Makefile               |    2 +
> >  drivers/media/platform/mtk-mdp3/Makefile      |    6 +
> >  .../media/platform/mtk-mdp3/mdp_reg_ccorr.h   |   19 +
> >  drivers/media/platform/mtk-mdp3/mdp_reg_isp.h |   27 +
> >  .../media/platform/mtk-mdp3/mdp_reg_rdma.h    |   65 +
> >  drivers/media/platform/mtk-mdp3/mdp_reg_rsz.h |   39 +
> >  .../media/platform/mtk-mdp3/mdp_reg_wdma.h    |   47 +
> >  .../media/platform/mtk-mdp3/mdp_reg_wrot.h    |   55 +
> >  drivers/media/platform/mtk-mdp3/mtk-img-ipi.h |  280 ++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-cmdq.c   |  505 +++++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-cmdq.h   |   46 +
> >  .../media/platform/mtk-mdp3/mtk-mdp3-comp.c   | 1264 +++++++++++++++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-comp.h   |  147 ++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-core.c   |  338 +++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-core.h   |   76 +
> >  .../media/platform/mtk-mdp3/mtk-mdp3-m2m.c    |  789 ++++++++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-m2m.h    |   49 +
> >  .../media/platform/mtk-mdp3/mtk-mdp3-regs.c   |  737 ++++++++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-regs.h   |  372 +++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-vpu.c    |  312 ++++
> >  .../media/platform/mtk-mdp3/mtk-mdp3-vpu.h    |   78 +
> >  22 files changed, 5272 insertions(+)
> >  create mode 100644 drivers/media/platform/mtk-mdp3/Makefile
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mdp_reg_ccorr.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mdp_reg_isp.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mdp_reg_rdma.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mdp_reg_rsz.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mdp_reg_wdma.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mdp_reg_wrot.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-img-ipi.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-cmdq.c
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-cmdq.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-comp.c
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-comp.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-core.c
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-core.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-m2m.c
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-m2m.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.c
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-regs.h
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-vpu.c
> >  create mode 100644 drivers/media/platform/mtk-mdp3/mtk-mdp3-vpu.h
> >
> > diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> > index cf4adc64c953..e6c1e8892154 100644
> > --- a/drivers/media/platform/Kconfig
> > +++ b/drivers/media/platform/Kconfig
> > @@ -315,6 +315,25 @@ config VIDEO_MEDIATEK_MDP
> >           To compile this driver as a module, choose M here: the
> >           module will be called mtk-mdp.
> >
> > +config VIDEO_MEDIATEK_MDP3
> > +     tristate "Mediatek MDP v3 driver"
> > +     depends on MTK_IOMMU || COMPLIE_TEST
>
> Typo: COMPLIE_TEST -> COMPILE_TEST
>
> After fixing this, trying to build this driver on my PC results in:
>
> ERROR: modpost: "mtk_mmsys_mdp_connect" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mmsys_mdp_camin_ctrl" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mmsys_mdp_isp_ctrl" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mutex_prepare" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mmsys_mdp_disconnect" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mutex_unprepare" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mutex_get_mdp_mod" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mutex_put" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mutex_mdp_get" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> ERROR: modpost: "mtk_mutex_add_mod_by_cmdq" [drivers/media/platform/mtk-mdp3/mtk-mdp3.ko] undefined!
> WARNING: modpost: suppressed 1 unresolved symbol warnings because there were too many)
>
> include/linux/soc/mediatek/mtk-mmsys.h should probably provide dummy functions
> if CONFIG_MTK_MMSYS is undefined. Ditto for include/linux/soc/mediatek/mtk-mutex.h.

Or add a hard dependency on MTK_MMSYS?
The latter can be enabled when compile-testing.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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