From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 91BE24CB5B for ; Wed, 19 Nov 2025 02:30:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763519418; cv=none; b=AbLuhfWzKhSh/cULufLvCnbTLGpvKfEBx6szUc6OT8XLfZneLy17Xg4yQaKyrHjDeG5rzLIF/wDnQF3W3J/BzU3TvnAtdHFPhh8scvus8AB3rCYiJI5gHHg/aK0QHMTOyH0S/W3Dpn/cA+uMPNf0kPuHKMj/2/E0hs6aH255GTU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763519418; c=relaxed/simple; bh=9jslsko6Ysi4k4hZdq86FFeqtg1ZzbHLWDCJLb+kEsg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=sAwty7g0fXcV1rACunM4BjtFIHHQqya4cAnmYlGOhYJ1vjM8kCWjMtNh5QSxQ6v4HSQWVKZzFW41Z81IcrRXVdhSw3N2f153wHqw5zhIURY2F6qvxEMoJEA/9DX5ki25+H7pnGqwHDYyfLEhIHPyRNdbnDy2llc8gcjHVjSsYM0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=aG0vRxlt; arc=none smtp.client-ip=209.85.210.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="aG0vRxlt" Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-7baf61be569so4677907b3a.3 for ; Tue, 18 Nov 2025 18:30:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763519416; x=1764124216; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=IAUl3DvNF4a96OMaEmiq14uCqbdByDkYT7FAGSKW29g=; b=aG0vRxltqemu4lIVdbi9eszF7oOplesYgRQ1rojPHy0/pHB1j6mTB8K52CE9J5qfFI S0nv0iT8rkE3SUWYs8rD6BYgpNfyX9hnCm6R9/i6duiSSqqcv96nZ8z/5S4cdnEDPKlb 6xaDP4DYoNVtJ3Cx76W/A5qvtFS83f+z+MV/+Gc4x/LNKVtkm3pB1eOBV5tJyMiA3b3z U8di+cGFUY5LZuxvFbrR99Z4WrOdfeG/+Mm5cojSihvDL20D37dNuu5zuQGvo87UruAr a4fnsi755rv9Ce2fSzg0QgVncJoReJFSJ47EZPJUE1eLOiC3jXvg8njPS25FfTbsNCUF hHnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763519416; x=1764124216; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=IAUl3DvNF4a96OMaEmiq14uCqbdByDkYT7FAGSKW29g=; b=kTaOzSKbkl6la4BTZX2MA3Zos68wnv5nXJF4109PxEL/i/thPsdQlXqiIdlDFKhun5 4ElWP14189xOt0Se3arCcW92G6aQF5s8uA4dkuCnjuD5hp8DndjndfW/BiIIdqqRoJWB uH747KK2J7dXcXQj+NMDPG0nG9qyYwuIpyxV8HZZI6r04dd6mrpyhR/WKs3v7yFfM5oj zhlJ0Q7FKEmuZ06jrvMvGbJEsbkCGbSNLmFMr4GjCVvMjzU+7dT8jeDuRtd3rGo2/VJU 5b/2/N9g0s7crE7YV6uJUAqvEvlpVDZ7TTz5lCIwsoJXNn36zjqw9tqdp6gSQ2U4Sdsz jSdg== X-Forwarded-Encrypted: i=1; AJvYcCVMupjRwRc3GhyOfAhI4tRa4EoAMyfsZpvTO4TTAtHGbLRolMqdeOJWAOxgthQ73qSu4cH2iso6qsW/@vger.kernel.org X-Gm-Message-State: AOJu0Yzw5QFcTONjhwqQa5Jw7l5n5Dbw3cASobJJBRc/umpJMFQMabLk Kq/DSQ7RoFFDwhWcDYKswWTwxSmVwG1ciKc2ipHr1vKqw22ktXaEXzBR X-Gm-Gg: ASbGncuG2N7K3s1Dbm0X6iAsNnQFRNepaTJ7/aLreJ5p/DmmLUtVUo6TUE8mMmIndKm YMs0gq2U4aAqcGrWEbp0pmGyLjAhIPS+fDjzJ36tTWqXsrkiN08MfYgHmepy3fUfRjiUpBFaNXq t4c3shFkLClyiNu5fpYE7JfIuR2LRy+GRw+8hLydBUolCven89OscLr0Pqa2TpPhAqrCXxraWxd lY8CHu5Wkz2HBLM9hUY5rbL4A9RpthbbDT7EYeMlB3z0nmtTsTjf21fVUcCP5kCpRrt5KVdb/jE OPxCqHp5GzWAnynLh9yVeuaPCw3FbhWD6P0gnC6ElqUp1uEqvS8SDzdhcDWoAk0U3kzjKZ+Xakr 4kEHbmJSBO7ZlxuDBgKSrJyXBwJwgXAj5ESX7JD9JA4ainUfF+Vtz7Nkirv5mACITZQZF8f8yNL FJcauYOUSkO6bh7SY5YGFVQirsMOJ3lvWx00s= X-Google-Smtp-Source: AGHT+IFh8r79lVQpAeCYF0NNbGC4p1MGfSUZomtiu+dfIgiNGPVRw/+zobtyaOULhCb1FmLl6qDzjQ== X-Received: by 2002:a05:7022:d8e:b0:119:e569:f258 with SMTP id a92af1059eb24-11b40e7b689mr5344109c88.1.1763519415678; Tue, 18 Nov 2025 18:30:15 -0800 (PST) Received: from fabio-Precision-3551.. ([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: devicetree@vger.kernel.org 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