dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driver

The ZynqMP DisplayPort subsystem includes a DMA engine called DPDMA with 6 DMa channels (4 for display and 2 for audio). This driver exposes the DPDMA through the dmaengine API, to be used by audio (ALSA) and display (DRM) drivers for the DisplayPort subsystem. Signed-off-by: Hyun Kwon <[email protected]> Signed-off-by: Tejas Upadhyay <[email protected]> Signed-off-by: Michal Simek <[email protected]> Signed-off-by: Laurent Pinchart <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Vinod Koul <[email protected]>
linkjumper · Jul 17, 2020 · 7cbb0c6 · 7cbb0c6
1 parent 9c8ebd8
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diff --git a/MAINTAINERS b/MAINTAINERS
@@ -18858,6 +18858,7 @@ M:	Laurent Pinchart <[email protected]>
 L:	[email protected]
 S:	Supported
 F:	Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
+F:	drivers/dma/xilinx/xilinx_dpdma.c
 F:	include/dt-bindings/dma/xlnx-zynqmp-dpdma.h
 
 XILLYBUS DRIVER

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
@@ -707,6 +707,16 @@ config XILINX_ZYNQMP_DMA
 	help
 	  Enable support for Xilinx ZynqMP DMA controller.
 
+config XILINX_ZYNQMP_DPDMA
+	tristate "Xilinx DPDMA Engine"
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Enable support for Xilinx ZynqMP DisplayPort DMA. Choose this option
+	  if you have a Xilinx ZynqMP SoC with a DisplayPort subsystem. The
+	  driver provides the dmaengine required by the DisplayPort subsystem
+	  display driver.
+
 config ZX_DMA
 	tristate "ZTE ZX DMA support"
 	depends on ARCH_ZX || COMPILE_TEST

diff --git a/drivers/dma/xilinx/Makefile b/drivers/dma/xilinx/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_XILINX_DMA) += xilinx_dma.o
 obj-$(CONFIG_XILINX_ZYNQMP_DMA) += zynqmp_dma.o
+obj-$(CONFIG_XILINX_ZYNQMP_DPDMA) += xilinx_dpdma.o