linux-kernel - Re: [PATCH] drm/mediatek: mtk_dpi: Create connector for bridges

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Message-ID: <CAAOTY_8eEgems8T-KJim--t5wCiPV8mEsqW3=HJa7tgEFuoezA@mail.gmail.com>
Date:   Thu, 14 Jan 2021 07:48:53 +0800
From:   Chun-Kuang Hu <chunkuang.hu@...nel.org>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Hsin-Yi Wang <hsinyi@...omium.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/mediatek: mtk_dpi: Create connector for bridges

Hi, Hsin-Yi:

Chun-Kuang Hu <chunkuang.hu@...nel.org> 於 2020年12月11日 週五 下午10:04寫道：
>
> Hi, Hsin-Yi:
>
> Hsin-Yi Wang <hsinyi@...omium.org> 於 2020年12月3日 週四 下午4:24寫道：
> >
> > Similar to a9d9fea74be2 ("drm/mediatek: mtk_dsi: Create connector for bridges"):
> >
> > Use the drm_bridge_connector helper to create a connector for pipelines
> > that use drm_bridge. This allows splitting connector operations across
> > multiple bridges when necessary, instead of having the last bridge in
> > the chain creating the connector and handling all connector operations
> > internally.
>
> 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: Hsin-Yi Wang <hsinyi@...omium.org>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_dpi.c | 13 ++++++++++++-
> >  1 file changed, 12 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index 52f11a63a330..189377e342fa 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > @@ -20,6 +20,7 @@
> >
> >  #include <drm/drm_atomic_helper.h>
> >  #include <drm/drm_bridge.h>
> > +#include <drm/drm_bridge_connector.h>
> >  #include <drm/drm_crtc.h>
> >  #include <drm/drm_of.h>
> >  #include <drm/drm_simple_kms_helper.h>
> > @@ -66,6 +67,7 @@ struct mtk_dpi {
> >         struct drm_encoder encoder;
> >         struct drm_bridge bridge;
> >         struct drm_bridge *next_bridge;
> > +       struct drm_connector *connector;
> >         void __iomem *regs;
> >         struct device *dev;
> >         struct clk *engine_clk;
> > @@ -603,12 +605,21 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
> >
> >         dpi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm_dev, dpi->ddp_comp);
> >
> > -       ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL, 0);
> > +       ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL,
> > +                               DRM_BRIDGE_ATTACH_NO_CONNECTOR);
> >         if (ret) {
> >                 dev_err(dev, "Failed to attach bridge: %d\n", ret);
> >                 goto err_cleanup;
> >         }
> >
> > +       dpi->connector = drm_bridge_connector_init(drm_dev, &dpi->encoder);
> > +       if (IS_ERR(dpi->connector)) {
> > +               dev_err(dev, "Unable to create bridge connector\n");
> > +               ret = PTR_ERR(dpi->connector);
> > +               goto err_cleanup;
> > +       }
> > +       drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
> > +
> >         dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> >         dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> >         dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> > --
> > 2.29.2.576.ga3fc446d84-goog
> >