linux-kernel - Re: [PATCH v2 4/5] drm/vc4: remove bridge from driver internal structure

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Date:   Mon, 9 Oct 2017 10:55:35 +0200
From:   Benjamin Gaignard <benjamin.gaignard@...aro.org>
To:     Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        Yannick Fertre <yannick.fertre@...com>,
        Philippe Cornu <philippe.cornu@...com>,
        Eric Anholt <eric@...olt.net>
Cc:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>
Subject: Re: [PATCH v2 4/5] drm/vc4: remove bridge from driver internal structure

2017-10-02 11:34 GMT+02:00 Benjamin Gaignard <benjamin.gaignard@...aro.org>:
> With a call to drm_of_panel_bridge_remove() we could remove
> the bridge without store it in vc4_dpi internal driver structure.

+ Eric to get his point of view on that

>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...aro.org>
> ---
>  drivers/gpu/drm/vc4/vc4_dpi.c | 17 ++++++-----------
>  1 file changed, 6 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
> index 519cefe..72c9dbd 100644
> --- a/drivers/gpu/drm/vc4/vc4_dpi.c
> +++ b/drivers/gpu/drm/vc4/vc4_dpi.c
> @@ -97,8 +97,6 @@ struct vc4_dpi {
>
>         struct drm_encoder *encoder;
>         struct drm_connector *connector;
> -       struct drm_bridge *bridge;
> -       bool is_panel_bridge;
>
>         void __iomem *regs;
>
> @@ -251,10 +249,11 @@ static int vc4_dpi_init_bridge(struct vc4_dpi *dpi)
>  {
>         struct device *dev = &dpi->pdev->dev;
>         struct drm_panel *panel;
> +       struct drm_bridge *bridge;
>         int ret;
>
>         ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
> -                                         &panel, &dpi->bridge);
> +                                         &panel, &bridge);
>         if (ret) {
>                 /* If nothing was connected in the DT, that's not an
>                  * error.
> @@ -265,13 +264,10 @@ static int vc4_dpi_init_bridge(struct vc4_dpi *dpi)
>                         return ret;
>         }
>
> -       if (panel) {
> -               dpi->bridge = drm_panel_bridge_add(panel,
> -                                                  DRM_MODE_CONNECTOR_DPI);
> -               dpi->is_panel_bridge = true;
> -       }
> +       if (panel)
> +               bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DPI);
>
> -       return drm_bridge_attach(dpi->encoder, dpi->bridge, NULL);
> +       return drm_bridge_attach(dpi->encoder, bridge, NULL);
>  }
>
>  static int vc4_dpi_bind(struct device *dev, struct device *master, void *data)
> @@ -352,8 +348,7 @@ static void vc4_dpi_unbind(struct device *dev, struct device *master,
>         struct vc4_dev *vc4 = to_vc4_dev(drm);
>         struct vc4_dpi *dpi = dev_get_drvdata(dev);
>
> -       if (dpi->is_panel_bridge)
> -               drm_panel_bridge_remove(dpi->bridge);
> +       drm_of_panel_bridge_remove(dev->of_node, 0, 0);
>
>         drm_encoder_cleanup(dpi->encoder);
>
> --
> 2.7.4
>



-- 
Benjamin Gaignard

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