From: Fabio Estevam <festevam@gmail.com>
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 <festevam@gmail.com>
Subject: [PATCH v2 1/2] dt-bindings: display: bridge: ldb: Document nxp,enable-termination-resistor
Date: Tue, 18 Nov 2025 23:29:45 -0300 [thread overview]
Message-ID: <20251119022946.268748-1-festevam@gmail.com> (raw)
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 <festevam@gmail.com>
---
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
next reply other threads:[~2025-11-19 2:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-19 2:29 Fabio Estevam [this message]
2025-11-19 2:29 ` [PATCH v2 2/2] drm/bridge: fsl-ldb: Allow the termination resistor to be enabled Fabio Estevam
2025-11-19 7:33 ` [PATCH v2 1/2] dt-bindings: display: bridge: ldb: Document nxp,enable-termination-resistor Krzysztof Kozlowski
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