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([2804:14c:485:4b61::1000]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2b6fc2820a2sm4326816eec.35.2026.01.20.15.19.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Jan 2026 15:20:01 -0800 (PST) From: Fabio Estevam To: victor.liu@nxp.com Cc: marek.vasut@mailbox.org, neil.armstrong@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, frank.li@nxp.com, Fabio Estevam Subject: [PATCH v3 1/2] dt-bindings: display: bridge: ldb: Document nxp,enable-termination-resistor Date: Tue, 20 Jan 2026 20:19:29 -0300 Message-Id: <20260120231930.2782444-1-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Fabio Estevam Document the optional nxp,enable-termination-resistor property for the i.MX LVDS display bridge. This boolean property indicates that the built-in 100 Ohm termination resistor on the LVDS output is enabled. It is controlled via the HS_EN bit in the LVDS_CTRL register. Enabling the resistor can improve LVDS signal quality and may prevent visual artifacts on some boards, but increases the power consumption. Signed-off-by: Fabio Estevam --- Changes since v1: - Restrict it to i.MX6SX. (Liu Ying) .../bindings/display/bridge/fsl,ldb.yaml | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml index 49664101a353..7f380879fffd 100644 --- a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml +++ b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml @@ -35,6 +35,15 @@ properties: - const: ldb - const: lvds + nxp,enable-termination-resistor: + type: boolean + description: + Indicates that the built-in 100 Ohm termination resistor on the LVDS + output is enabled. This property is optional and controlled via the + HS_EN bit in the LVDS_CTRL register. Enabling it can improve signal + quality and prevent visual artifacts on some boards, but increases + power consumption. + ports: $ref: /schemas/graph.yaml#/properties/ports @@ -84,6 +93,15 @@ allOf: required: - reg-names + - if: + properties: + compatible: + contains: + const: fsl,imx6sx-ldb + then: + properties: + nxp,enable-termination-resistor: false + additionalProperties: false examples: -- 2.34.1