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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/imx/fsl,imx8qxp-dc-scaling-engine.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale i.MX8qxp Display Controller Scaling Engine
description: |
The unit can change the dimension of the input frame by nearest or linear
re-sampling with 1/32 sub pixel precision.
Internally it consist of two independent blocks for horizontal and vertical
scaling. The sequence of both operations is arbitrary.
Any frame dimensions between 1 and 16384 pixels in width and height are
supported, except that the vertical scaler has a frame width maximum
depending of the system's functional limitations.
In general all scale factors are supported inside the supported frame
dimensions. In range of scale factors 1/16..16 the filtered output colors
are LSBit precise (e.g. DC ripple free).
+-----------+
| Line |
| Buffer |
+-----------+
^
|
V
|\ +-----------+
------+ | | |
| | +-->| Vertical |----
| ----+ | | Scaler | |
| | |/ +-----------+ |
| | |
| | |
| | | |\
| ------------- -------------+-----+ |
Input --+ X | +--> Output
| ------------- -------------+-----+ |
| | | |/
| | |
| | |\ +-----------+ |
| ----+ | | | |
| | +-->| Horizontal|----
------+ | | Scaler |
|/ +-----------+
The unit supports downscaling, upscaling, sub pixel translation and bob
de-interlacing.
maintainers:
- Liu Ying <victor.liu@nxp.com>
properties:
compatible:
enum:
- fsl,imx8qxp-dc-hscaler
- fsl,imx8qxp-dc-vscaler
reg:
maxItems: 2
reg-names:
items:
- const: pec
- const: cfg
required:
- compatible
- reg
- reg-names
additionalProperties: false
examples:
- |
hscaler@561808c0 {
compatible = "fsl,imx8qxp-dc-hscaler";
reg = <0x561808c0 0x10>, <0x56183000 0x18>;
reg-names = "pec", "cfg";
};
|
