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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Wed, 24 Jul 2019 09:28:58 +0200
Message-ID: <CAMuHMdVKiJp0PsuogMo8FZ6NUxi4j09+A2zDXZr4nrtZY-KHaw@mail.gmail.com>
Subject: Re: [PATCH] drm: rcar_lvds: Fix dual link mode operations
To:     Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Fabrizio Castro <fabrizio.castro@bp.renesas.com>,
        "open list:DRM DRIVERS FOR RENESAS" <dri-devel@lists.freedesktop.org>,
        "open list:DRM DRIVERS FOR RENESAS" 
        <linux-renesas-soc@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>
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Hi Jacopo,

On Wed, Jul 24, 2019 at 3:38 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> The R-Car LVDS encoder units support dual-link operations by splitting
> the pixel output between the primary encoder and the companion one.
>
> In order for the primary encoder to succesfully control the companion's
> operations this should not fail at probe time and register itself its
> associated drm bridge so that the primary one can find it.
>
> Currently the companion encoder fails at probe time, causing the
> registration of the primary to fail preventing the whole DU unit to be
> registered correctly.
>
> Fixes: fa440d870358 ("drm: rcar-du: lvds: Add support for dual-link mode")
> Reported-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>
> ---
> The "Fixes" tag refers to a patch currently part of the
> renesas-drivers-2019-07-09-v5.2 branch of Geert's renesas-drivers tree.

The broken commit is also present in v5.3-rc1.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds