linux-kernel - Re: [v7, PATCH 7/7] drm/mediatek: add support for mediatek SOC MT8183

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Message-ID: <CAAOTY_84qPMZPSpXvF9=hCWVPQ2Y4ndZB8gt8E_ZpuxQ0YiitQ@mail.gmail.com>
Date:   Mon, 27 Jul 2020 22:50:39 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Yongqiang Niu <yongqiang.niu@...iatek.com>
Cc:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        CK Hu <ck.hu@...iatek.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, David Airlie <airlied@...ux.ie>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [v7, PATCH 7/7] drm/mediatek: add support for mediatek SOC MT8183

Hi, Yongqiang:

Yongqiang Niu <yongqiang.niu@...iatek.com> 於 2020年7月27日 週一 下午3:54寫道：
>
> On Sat, 2020-07-25 at 07:24 +0800, Chun-Kuang Hu wrote:
> > Hi Yongqiang:
> >
> > Yongqiang Niu <yongqiang.niu@...iatek.com> 於 2020年7月23日 週四 上午10:15寫道：
> > >
> > > This patch add support for mediatek SOC MT8183
> > > 1.ovl_2l share driver with ovl
> >
> > I think this is done in [1], [2], [3], this patch just add the support
> > of mt8183-ovl and mt8183-ovl-2l.
> >
> > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/mediatek?h=v5.8-rc6&id=132c6e250ed745443973cada8db17cdbaebdf551
> > [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/mediatek?h=v5.8-rc6&id=318462d1a568634ba09263cc730cb0fb1d56c2b3
> > [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/mediatek?h=v5.8-rc6&id=57148baac8b78461e394953cfd5317bde8f795ab
> >
> > > 2.rdma1 share drive with rdma0, but fifo size is different
> >
> > I think this is done in [4], this patch just add the support of mt8183-rdma.
> >
> > [4] https://patchwork.kernel.org/patch/11679549/
> >
> > > 3.add mt8183 mutex private data, and mmsys private data
> > > 4.add mt8183 main and external path module for crtc create
> >
> > The fourth item is the mmsys private data in third item, so you need
> > not to repeat it.
> >
> > >
> > > Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> > > ---
> > >  drivers/gpu/drm/mediatek/mtk_disp_ovl.c  | 18 ++++++++++++
> > >  drivers/gpu/drm/mediatek/mtk_disp_rdma.c |  6 ++++
> > >  drivers/gpu/drm/mediatek/mtk_drm_ddp.c   | 47 ++++++++++++++++++++++++++++++++
> > >  drivers/gpu/drm/mediatek/mtk_drm_drv.c   | 43 +++++++++++++++++++++++++++++
> > >  4 files changed, 114 insertions(+)
> > >
> >
> > [snip]
> >
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > > index 014c1bb..60788c1 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > > @@ -15,6 +15,8 @@
> > >
> > >  #define MT2701_DISP_MUTEX0_MOD0                        0x2c
> > >  #define MT2701_DISP_MUTEX0_SOF0                        0x30
> > > +#define MT8183_DISP_MUTEX0_MOD0                        0x30
> > > +#define MT8183_DISP_MUTEX0_SOF0                        0x2c
> > >
> > >  #define DISP_REG_MUTEX_EN(n)                   (0x20 + 0x20 * (n))
> > >  #define DISP_REG_MUTEX(n)                      (0x24 + 0x20 * (n))
> > > @@ -25,6 +27,18 @@
> > >
> > >  #define INT_MUTEX                              BIT(1)
> > >
> > > +#define MT8183_MUTEX_MOD_DISP_RDMA0            0
> > > +#define MT8183_MUTEX_MOD_DISP_RDMA1            1
> > > +#define MT8183_MUTEX_MOD_DISP_OVL0             9
> > > +#define MT8183_MUTEX_MOD_DISP_OVL0_2L          10
> > > +#define MT8183_MUTEX_MOD_DISP_OVL1_2L          11
> > > +#define MT8183_MUTEX_MOD_DISP_WDMA0            12
> > > +#define MT8183_MUTEX_MOD_DISP_COLOR0           13
> > > +#define MT8183_MUTEX_MOD_DISP_CCORR0           14
> > > +#define MT8183_MUTEX_MOD_DISP_AAL0             15
> > > +#define MT8183_MUTEX_MOD_DISP_GAMMA0           16
> > > +#define MT8183_MUTEX_MOD_DISP_DITHER0          17
> > > +
> > >  #define MT8173_MUTEX_MOD_DISP_OVL0             11
> > >  #define MT8173_MUTEX_MOD_DISP_OVL1             12
> > >  #define MT8173_MUTEX_MOD_DISP_RDMA0            13
> > > @@ -74,6 +88,10 @@
> > >  #define MUTEX_SOF_DSI2                 5
> > >  #define MUTEX_SOF_DSI3                 6
> > >
> > > +#define MT8183_MUTEX_SOF_DPI0                  2
> > > +#define MT8183_MUTEX_EOF_DSI0                  (MUTEX_SOF_DSI0 << 6)
> > > +#define MT8183_MUTEX_EOF_DPI0                  (MT8183_MUTEX_SOF_DPI0 << 6)
> > > +
> > >
> > >  struct mtk_disp_mutex {
> > >         int id;
> > > @@ -153,6 +171,20 @@ struct mtk_ddp {
> > >         [DDP_COMPONENT_WDMA1] = MT8173_MUTEX_MOD_DISP_WDMA1,
> > >  };
> > >
> > > +static const unsigned int mt8183_mutex_mod[DDP_COMPONENT_ID_MAX] = {
> > > +       [DDP_COMPONENT_AAL0] = MT8183_MUTEX_MOD_DISP_AAL0,
> > > +       [DDP_COMPONENT_CCORR] = MT8183_MUTEX_MOD_DISP_CCORR0,
> > > +       [DDP_COMPONENT_COLOR0] = MT8183_MUTEX_MOD_DISP_COLOR0,
> > > +       [DDP_COMPONENT_DITHER] = MT8183_MUTEX_MOD_DISP_DITHER0,
> > > +       [DDP_COMPONENT_GAMMA] = MT8183_MUTEX_MOD_DISP_GAMMA0,
> > > +       [DDP_COMPONENT_OVL0] = MT8183_MUTEX_MOD_DISP_OVL0,
> > > +       [DDP_COMPONENT_OVL_2L0] = MT8183_MUTEX_MOD_DISP_OVL0_2L,
> > > +       [DDP_COMPONENT_OVL_2L1] = MT8183_MUTEX_MOD_DISP_OVL1_2L,
> > > +       [DDP_COMPONENT_RDMA0] = MT8183_MUTEX_MOD_DISP_RDMA0,
> > > +       [DDP_COMPONENT_RDMA1] = MT8183_MUTEX_MOD_DISP_RDMA1,
> > > +       [DDP_COMPONENT_WDMA0] = MT8183_MUTEX_MOD_DISP_WDMA0,
> > > +};
> > > +
> > >  static const unsigned int mt2712_mutex_sof[DDP_MUTEX_SOF_DSI3 + 1] = {
> > >         [DDP_MUTEX_SOF_SINGLE_MODE] = MUTEX_SOF_SINGLE_MODE,
> > >         [DDP_MUTEX_SOF_DSI0] = MUTEX_SOF_DSI0,
> > > @@ -163,6 +195,12 @@ struct mtk_ddp {
> > >         [DDP_MUTEX_SOF_DSI3] = MUTEX_SOF_DSI3,
> > >  };
> > >
> > > +static const unsigned int mt8183_mutex_sof[DDP_MUTEX_SOF_DSI3 + 1] = {
> > > +       [DDP_MUTEX_SOF_SINGLE_MODE] = MUTEX_SOF_SINGLE_MODE,
> > > +       [DDP_MUTEX_SOF_DSI0] = MUTEX_SOF_DSI0 | MT8183_MUTEX_EOF_DSI0,
> >
> > I think this array is for 'sof', so you should drop MT8183_MUTEX_EOF_DSI0.
> >
> > > +       [DDP_MUTEX_SOF_DPI0] = MT8183_MUTEX_SOF_DPI0 | MT8183_MUTEX_EOF_DPI0,
> >
> > Ditto.
> >
> > Regards,
> > Chun-Kuang.
>
> MT8183 mutex setting is different with before SoC.
> if we do not set EOF, Overlay hardware will not receive frame done irq,
> and will display error.

Please add comment for this because this is not a trivial thing.

Regards,
Chun-Kuang.

> >
> > > +};
> > > +
> > >  static const struct mtk_ddp_data mt2701_ddp_driver_data = {
> > >         .mutex_mod = mt2701_mutex_mod,
> > >         .mutex_sof = mt2712_mutex_sof,
> > > @@ -184,6 +222,13 @@ struct mtk_ddp {
> > >         .mutex_sof_reg = MT2701_DISP_MUTEX0_SOF0,
> > >  };
> > >
>