1*833e5d42SEmmanuel Vadot# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2*833e5d42SEmmanuel Vadot%YAML 1.2 3*833e5d42SEmmanuel Vadot--- 4*833e5d42SEmmanuel Vadot$id: http://devicetree.org/schemas/display/imx/fsl,imx8qxp-dc-signature.yaml# 5*833e5d42SEmmanuel Vadot$schema: http://devicetree.org/meta-schemas/core.yaml# 6*833e5d42SEmmanuel Vadot 7*833e5d42SEmmanuel Vadottitle: Freescale i.MX8qxp Display Controller Signature Unit 8*833e5d42SEmmanuel Vadot 9*833e5d42SEmmanuel Vadotdescription: | 10*833e5d42SEmmanuel Vadot In order to control the correctness of display output, signature values can 11*833e5d42SEmmanuel Vadot be computed for each frame and compared against reference values. In case of 12*833e5d42SEmmanuel Vadot a mismatch (signature violation) a HW event can be triggered, for example a 13*833e5d42SEmmanuel Vadot SW interrupt. 14*833e5d42SEmmanuel Vadot 15*833e5d42SEmmanuel Vadot This unit supports signature computation, reference check, evaluation windows, 16*833e5d42SEmmanuel Vadot alpha masking and panic modes. 17*833e5d42SEmmanuel Vadot 18*833e5d42SEmmanuel Vadotmaintainers: 19*833e5d42SEmmanuel Vadot - Liu Ying <victor.liu@nxp.com> 20*833e5d42SEmmanuel Vadot 21*833e5d42SEmmanuel Vadotproperties: 22*833e5d42SEmmanuel Vadot compatible: 23*833e5d42SEmmanuel Vadot const: fsl,imx8qxp-dc-signature 24*833e5d42SEmmanuel Vadot 25*833e5d42SEmmanuel Vadot reg: 26*833e5d42SEmmanuel Vadot maxItems: 1 27*833e5d42SEmmanuel Vadot 28*833e5d42SEmmanuel Vadot interrupts: 29*833e5d42SEmmanuel Vadot maxItems: 3 30*833e5d42SEmmanuel Vadot 31*833e5d42SEmmanuel Vadot interrupt-names: 32*833e5d42SEmmanuel Vadot items: 33*833e5d42SEmmanuel Vadot - const: shdload 34*833e5d42SEmmanuel Vadot - const: valid 35*833e5d42SEmmanuel Vadot - const: error 36*833e5d42SEmmanuel Vadot 37*833e5d42SEmmanuel Vadotrequired: 38*833e5d42SEmmanuel Vadot - compatible 39*833e5d42SEmmanuel Vadot - reg 40*833e5d42SEmmanuel Vadot - interrupts 41*833e5d42SEmmanuel Vadot - interrupt-names 42*833e5d42SEmmanuel Vadot 43*833e5d42SEmmanuel VadotadditionalProperties: false 44*833e5d42SEmmanuel Vadot 45*833e5d42SEmmanuel Vadotexamples: 46*833e5d42SEmmanuel Vadot - | 47*833e5d42SEmmanuel Vadot signature@5618d000 { 48*833e5d42SEmmanuel Vadot compatible = "fsl,imx8qxp-dc-signature"; 49*833e5d42SEmmanuel Vadot reg = <0x5618d000 0x140>; 50*833e5d42SEmmanuel Vadot interrupt-parent = <&dc0_intc>; 51*833e5d42SEmmanuel Vadot interrupts = <22>, <23>, <24>; 52*833e5d42SEmmanuel Vadot interrupt-names = "shdload", "valid", "error"; 53*833e5d42SEmmanuel Vadot }; 54