On Thu, Nov 07, 2019 at 04:13:57AM +0200, Laurent Pinchart wrote: > The ZynqMP includes the DisplayPort subsystem with its own DMA engine > called DPDMA. The DPDMA IP comes with 6 individual channels > (4 for display, 2 for audio). This documentation describes DT bindings > of DPDMA. > > Signed-off-by: Hyun Kwon <hyun.kwon@xxxxxxxxxx> > Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx> > Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > Changes since v1: > > - Convert the DT bindings to YAML > - Drop the DT child nodes > --- > .../dma/xilinx/xlnx,zynqmp-dpdma.yaml | 68 +++++++++++++++++++ > MAINTAINERS | 8 +++ > include/dt-bindings/dma/xlnx-zynqmp-dpdma.h | 16 +++++ > 3 files changed, 92 insertions(+) > create mode 100644 Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml > create mode 100644 include/dt-bindings/dma/xlnx-zynqmp-dpdma.h > > diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml > new file mode 100644 > index 000000000000..b677b2c4f302 > --- /dev/null > +++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml > @@ -0,0 +1,68 @@ > +# SPDX-License-Identifier: GPL-2.0 For new bindings: # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) Otherwise, Reviewed-by: Rob Herring <robh@xxxxxxxxxx> > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/dma/xlnx,zynqmp-dpdma.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Xilinx ZynqMP DisplayPort DMA Controller Device Tree Bindings > + > +description: | > + These bindings describe the DMA engine included in the Xilinx ZynqMP > + DisplayPort Subsystem. The DMA engine supports up to 6 DMA channels (3 > + channels for a video stream, 1 channel for a graphics stream, and 2 channels > + for an audio stream). > + > +maintainers: > + - Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > + > +allOf: > + - $ref: "dma-controller.yaml#" > + > +properties: > + "#dma-cells": > + const: 1 > + description: | > + The cell is the DMA channel ID (see dt-bindings/dma/xlnx-zynqmp-dpdma.h > + for a list of channel IDs). > + > + compatible: > + const: xlnx,zynqmp-dpdma > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + clocks: > + description: The AXI clock > + maxItems: 1 > + > + clock-names: > + const: axi_clk > + > +required: > + - "#dma-cells" > + - compatible > + - reg > + - interrupts > + - clocks > + - clock-names > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + > + dma: dma-controller@fd4c0000 { > + compatible = "xlnx,zynqmp-dpdma"; > + reg = <0x0 0xfd4c0000 0x0 0x1000>; > + interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>; > + interrupt-parent = <&gic>; > + clocks = <&dpdma_clk>; > + clock-names = "axi_clk"; > + #dma-cells = <1>; > + }; > + > +... > diff --git a/MAINTAINERS b/MAINTAINERS > index cba1095547fd..457b39bc2320 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -17898,6 +17898,14 @@ F: drivers/misc/Kconfig > F: drivers/misc/Makefile > F: include/uapi/misc/xilinx_sdfec.h > > +XILINX ZYNQMP DPDMA DRIVER > +M: Hyun Kwon <hyun.kwon@xxxxxxxxxx> > +M: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > +L: dmaengine@xxxxxxxxxxxxxxx > +S: Supported > +F: Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml > +F: include/dt-bindings/dma/xlnx-zynqmp-dpdma.h > + > XILLYBUS DRIVER > M: Eli Billauer <eli.billauer@xxxxxxxxx> > L: linux-kernel@xxxxxxxxxxxxxxx > diff --git a/include/dt-bindings/dma/xlnx-zynqmp-dpdma.h b/include/dt-bindings/dma/xlnx-zynqmp-dpdma.h > new file mode 100644 > index 000000000000..3719cda5679d > --- /dev/null > +++ b/include/dt-bindings/dma/xlnx-zynqmp-dpdma.h > @@ -0,0 +1,16 @@ > +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */ > +/* > + * Copyright 2019 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > + */ > + > +#ifndef __DT_BINDINGS_DMA_XLNX_ZYNQMP_DPDMA_H__ > +#define __DT_BINDINGS_DMA_XLNX_ZYNQMP_DPDMA_H__ > + > +#define ZYNQMP_DPDMA_VIDEO0 0 > +#define ZYNQMP_DPDMA_VIDEO1 1 > +#define ZYNQMP_DPDMA_VIDEO2 2 > +#define ZYNQMP_DPDMA_GRAPHICS 3 > +#define ZYNQMP_DPDMA_AUDIO0 4 > +#define ZYNQMP_DPDMA_AUDIO1 5 > + > +#endif /* __DT_BINDINGS_DMA_XLNX_ZYNQMP_DPDMA_H__ */ > -- > Regards, > > Laurent Pinchart >
