From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: Re: [PATCH 1/5] dt-bindings: drm/bridge/synopsys: dw-hdmi: Add "unwedge" for ddc bus Date: Tue, 14 May 2019 15:49:12 -0500 Message-ID: <20190514204912.GA25548@bogus> References: <20190502225336.206885-1-dianders@chromium.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20190502225336.206885-1-dianders@chromium.org> Sender: linux-kernel-owner@vger.kernel.org Cc: Heiko Stuebner , Sandy Huang , Andrzej Hajda , Laurent Pinchart , linux-rockchip@lists.infradead.org, Neil Armstrong , Mark Rutland , mka@chromium.org, Sean Paul , Douglas Anderson , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, David Airlie , linux-arm-kernel@lists.infradead.org, Daniel Vetter List-Id: devicetree@vger.kernel.org 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 > --- > > .../bindings/display/rockchip/dw_hdmi-rockchip.txt | 7 +++++++ > 1 file changed, 7 insertions(+) > Reviewed-by: Rob Herring