Date:   Fri, 15 Jan 2021 07:27:07 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Yongqiang Niu <yongqiang.niu@...iatek.com>,
        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>,
        DTML <devicetree@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9, 05/11] drm/mediatek: add fifo_size into rdma private data

Hi, Yongqiang:

Chun-Kuang Hu <chunkuang.hu@...nel.org> 於 2021年1月7日 週四 下午6:05寫道：
>
> Hi, Yongqiang:
>
> Yongqiang Niu <yongqiang.niu@...iatek.com> 於 2021年1月7日 週四 上午11:12寫道：
> >
> > Get the fifo size from device tree
> > because each rdma in the same SoC may have different fifo size
>
> Reviewed-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>

Applied to mediatek-drm-next [1], thanks.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next

Regards,
Chun-Kuang.

>
> >
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 19 ++++++++++++++++++-
> >  1 file changed, 18 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > index d46b8ae..8c64d5c 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > @@ -64,6 +64,7 @@ struct mtk_disp_rdma {
> >         struct mtk_ddp_comp             ddp_comp;
> >         struct drm_crtc                 *crtc;
> >         const struct mtk_disp_rdma_data *data;
> > +       u32                             fifo_size;
> >  };
> >
> >  static inline struct mtk_disp_rdma *comp_to_rdma(struct mtk_ddp_comp *comp)
> > @@ -132,12 +133,18 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
> >         unsigned int threshold;
> >         unsigned int reg;
> >         struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
> > +       u32 rdma_fifo_size;
> >
> >         mtk_ddp_write_mask(cmdq_pkt, width, comp,
> >                            DISP_REG_RDMA_SIZE_CON_0, 0xfff);
> >         mtk_ddp_write_mask(cmdq_pkt, height, comp,
> >                            DISP_REG_RDMA_SIZE_CON_1, 0xfffff);
> >
> > +       if (rdma->fifo_size)
> > +               rdma_fifo_size = rdma->fifo_size;
> > +       else
> > +               rdma_fifo_size = RDMA_FIFO_SIZE(rdma);
> > +
> >         /*
> >          * Enable FIFO underflow since DSI and DPI can't be blocked.
> >          * Keep the FIFO pseudo size reset default of 8 KiB. Set the
> > @@ -146,7 +153,7 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
> >          */
> >         threshold = width * height * vrefresh * 4 * 7 / 1000000;
> >         reg = RDMA_FIFO_UNDERFLOW_EN |
> > -             RDMA_FIFO_PSEUDO_SIZE(RDMA_FIFO_SIZE(rdma)) |
> > +             RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) |
> >               RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
> >         mtk_ddp_write(cmdq_pkt, reg, comp, DISP_REG_RDMA_FIFO_CON);
> >  }
> > @@ -292,6 +299,16 @@ static int mtk_disp_rdma_probe(struct platform_device *pdev)
> >                 return comp_id;
> >         }
> >
> > +       if (of_find_property(dev->of_node, "mediatek,rdma-fifo-size", &ret)) {
> > +               ret = of_property_read_u32(dev->of_node,
> > +                                          "mediatek,rdma-fifo-size",
> > +                                          &priv->fifo_size);
> > +               if (ret) {
> > +                       dev_err(dev, "Failed to get rdma fifo size\n");
> > +                       return ret;
> > +               }
> > +       }
> > +
> >         ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
> >                                 &mtk_disp_rdma_funcs);
> >         if (ret) {
> > --
> > 1.8.1.1.dirty
> > _______________________________________________
> > Linux-mediatek mailing list
> > Linux-mediatek@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-mediatek

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