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Date:   Tue, 14 May 2019 15:49:12 -0500
From:   Rob Herring <robh@kernel.org>
To:     Douglas Anderson <dianders@chromium.org>
Cc:     Heiko Stuebner <heiko@sntech.de>, Sandy Huang <hjc@rock-chips.com>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        linux-rockchip@lists.infradead.org,
        Neil Armstrong <narmstrong@baylibre.com>,
        Mark Rutland <mark.rutland@arm.com>, mka@chromium.org,
        Sean Paul <seanpaul@chromium.org>,
        Douglas Anderson <dianders@chromium.org>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>,
        linux-arm-kernel@lists.infradead.org,
        Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH 1/5] dt-bindings: drm/bridge/synopsys: dw-hdmi: Add
 "unwedge" for ddc bus
Message-ID: <20190514204912.GA25548@bogus>
References: <20190502225336.206885-1-dianders@chromium.org>
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On Thu,  2 May 2019 15:53:32 -0700, Douglas Anderson wrote:
> In certain situations it was seen that we could wedge up the DDC bus
> on the HDMI adapter on rk3288.  The only way to unwedge was to mux one
> of the pins over to GPIO output-driven-low temporarily and then
> quickly mux back.  Full details can be found in the patch
> ("drm/bridge/synopsys: dw-hdmi: Add "unwedge" for ddc bus").
> 
> Since unwedge requires remuxing the pins, we first need to add to the
> bindings so that we can specify what state the pins should be in for
> unwedging.
> 
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---
> 
>  .../bindings/display/rockchip/dw_hdmi-rockchip.txt         | 7 +++++++
>  1 file changed, 7 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>