linux-kernel - Re: [PATCH 08/30] drm/bridge/analogix/anx78xx: Setup encoder before registering connector

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Message-ID: <CAG3jFyto=4U7wqtw92Escsu9cXGV=xD8SUKm_UUm7bRmYPUYxA@mail.gmail.com>
Date:   Fri, 19 Mar 2021 15:35:41 +0100
From:   Robert Foss <robert.foss@...aro.org>
To:     Lyude Paul <lyude@...hat.com>
Cc:     intel-gfx@...ts.freedesktop.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        amd-gfx@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Sam Ravnborg <sam@...nborg.org>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Torsten Duwe <duwe@....de>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/30] drm/bridge/analogix/anx78xx: Setup encoder before
 registering connector

Hey Lyude,

Thanks for the patch, it looks good to me.

Reviewed-by: Robert Foss <robert.foss@...aro.org>

On Fri, 19 Feb 2021 at 22:56, Lyude Paul <lyude@...hat.com> wrote:
>
> Since encoder mappings for connectors are exposed to userspace, we should
> be attaching the encoder before exposing the connector to userspace. Just a
> drive-by fix for an issue I noticed while fixing up usages of
> drm_dp_aux_init()/drm_dp_aux_register() across the tree.
>
> Signed-off-by: Lyude Paul <lyude@...hat.com>
> ---
>  drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
> index ec4607dc01eb..338dd8531d4b 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
> @@ -924,12 +924,6 @@ static int anx78xx_bridge_attach(struct drm_bridge *bridge,
>         drm_connector_helper_add(&anx78xx->connector,
>                                  &anx78xx_connector_helper_funcs);
>
> -       err = drm_connector_register(&anx78xx->connector);
> -       if (err) {
> -               DRM_ERROR("Failed to register connector: %d\n", err);
> -               return err;
> -       }
> -
>         anx78xx->connector.polled = DRM_CONNECTOR_POLL_HPD;
>
>         err = drm_connector_attach_encoder(&anx78xx->connector,
> @@ -939,6 +933,12 @@ static int anx78xx_bridge_attach(struct drm_bridge *bridge,
>                 return err;
>         }
>
> +       err = drm_connector_register(&anx78xx->connector);
> +       if (err) {
> +               DRM_ERROR("Failed to register connector: %d\n", err);
> +               return err;
> +       }
> +
>         return 0;
>  }
>
> --
> 2.29.2
>