1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2# Copyright 2019 BayLibre, SAS 3%YAML 1.2 4--- 5$id: http://devicetree.org/schemas/soc/amlogic/amlogic,canvas.yaml# 6$schema: http://devicetree.org/meta-schemas/core.yaml# 7 8title: Amlogic Canvas Video Lookup Table 9 10maintainers: 11 - Neil Armstrong <neil.armstrong@linaro.org> 12 - Maxime Jourdan <mjourdan@baylibre.com> 13 14description: | 15 A canvas is a collection of metadata that describes a pixel buffer. 16 Those metadata include: width, height, phyaddr, wrapping and block mode. 17 Starting with GXBB the endianness can also be described. 18 19 Many IPs within Amlogic SoCs rely on canvas indexes to read/write pixel data 20 rather than use the phy addresses directly. For instance, this is the case for 21 the video decoders and the display. 22 23 Amlogic SoCs have 256 canvas. 24 25properties: 26 compatible: 27 oneOf: 28 - items: 29 - enum: 30 - amlogic,meson8-canvas 31 - amlogic,meson8b-canvas 32 - amlogic,meson8m2-canvas 33 - const: amlogic,canvas 34 - const: amlogic,canvas # GXBB and newer SoCs 35 36 reg: 37 maxItems: 1 38 39required: 40 - compatible 41 - reg 42 43additionalProperties: false 44 45examples: 46 - | 47 canvas: video-lut@48 { 48 compatible = "amlogic,canvas"; 49 reg = <0x48 0x14>; 50 }; 51