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([2804:14c:485:4b61:8863:100d:2a2a:9a74]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-11b060885e3sm65842955c88.0.2025.11.18.18.30.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Nov 2025 18:30:15 -0800 (PST) From: Fabio Estevam To: neil.armstrong@linaro.org Cc: Laurent.pinchart@ideasonboard.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, imx@lists.linux.dev, Frank.li@nxp.com, Fabio Estevam Subject: [PATCH v2 1/2] dt-bindings: display: bridge: ldb: Document nxp,enable-termination-resistor Date: Tue, 18 Nov 2025 23:29:45 -0300 Message-Id: <20251119022946.268748-1-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: - Change the property name to nxp,enable-termination-resistor (Frank). .../devicetree/bindings/display/bridge/fsl,ldb.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml index 07388bf2b90d..6bc786204e65 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 -- 2.34.1