linux-kernel - [PATCH v4 0/2] Add Xilinx AXI Video DMA Engine driver

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Date:	Thu,  6 Mar 2014 16:48:35 +0530
From:	Srikanth Thokala <sthokal@...inx.com>
To:	dan.j.williams@...el.com, vinod.koul@...el.com,
	michal.simek@...inx.com, grant.likely@...aro.org,
	robh+dt@...nel.org
Cc:	levex@...ux.com, lars@...afoo.de,
	andriy.shevchenko@...ux.intel.com, jaswinder.singh@...aro.org,
	dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Srikanth Thokala <sthokal@...inx.com>
Subject: [PATCH v4 0/2] Add Xilinx AXI Video DMA Engine driver

Hi,

This is the driver for Xilinx AXI Video Direct Memory Access Engine.
It is a soft IP core, which provides high-bandwidth direct memory
access between memory and AXI4-Stream video type target peripherals
including peripherals which support AXI4-Stream Video Protocol. The
core provides efficient two dimensional DMA operations with independent
asynchronous read and write channel operation.

For more information on the IP, please refer to
http://www.xilinx.com/support/documentation/ip_documentation/axi_vdma/v6_1/pg020_axi_vdma.pdf

This patch also provides a test client, which assumes read and write channels
of the core are configured in a back-to-back connection.  It transfers
data on the write channel, read and verify the data on the read channel.

Use cases:
++++++++++
1. Xilinx Video Targeted Reference design
   http://www.wiki.xilinx.com/Zynq+Base+TRD+14.5
2. Common Display Framework
   http://events.linuxfoundation.org/sites/events/files/slides/20131024-elce.pdf

Regards,
Srikanth

Changes in v4:
- Rebased on v3.14.0-rc5
- Reverted the changes that were done for the earlier patch series,
  1/3 - 'Support multiple interleaved frames with non-contiguous memory' as
  suggested by Jaswinder, Thanks.

Changes in v3:
- Created a separate patch for the DT binding documentation as suggested by
  Vinod, Thanks.
- Added support for interleaved frames with non-contiguous memory as suggested
  by Lars, Thanks.
- Rebased on v3.14.0-rc2

Srikanth Thokala (2):
  dma: Add Xilinx Video DMA DT Binding Documentation
  dma: Add Xilinx AXI Video Direct Memory Access Engine driver support

 .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt |   75 ++
 drivers/dma/Kconfig                                |   14 +
 drivers/dma/Makefile                               |    1 +
 drivers/dma/xilinx/Makefile                        |    1 +
 drivers/dma/xilinx/xilinx_vdma.c                   | 1390 ++++++++++++++++++++
 include/linux/amba/xilinx_dma.h                    |   47 +
 6 files changed, 1528 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
 create mode 100644 drivers/dma/xilinx/Makefile
 create mode 100644 drivers/dma/xilinx/xilinx_vdma.c
 create mode 100644 include/linux/amba/xilinx_dma.h

-- 
1.7.4

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