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[24.155.109.49]) by smtp.gmail.com with ESMTPSA id o124sm1524501oig.23.2019.05.14.13.49.12 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 14 May 2019 13:49:12 -0700 (PDT) Date: Tue, 14 May 2019 15:49:12 -0500 From: Rob Herring To: Douglas Anderson 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> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190502225336.206885-1-dianders@chromium.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190514_134914_867962_F45D6A53 X-CRM114-Status: GOOD ( 13.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Heiko Stuebner , linux-rockchip@lists.infradead.org, David Airlie , linux-kernel@vger.kernel.org, Neil Armstrong , Sandy Huang , dri-devel@lists.freedesktop.org, Douglas Anderson , Andrzej Hajda , mka@chromium.org, Sean Paul , Laurent Pinchart , Daniel Vetter , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel