Add support for the DW IP Prototyping Kits for MIPI CSI-2 Host

Create device tree bindings documentation for Media and Video Device, as well as the DW MIPI CSI-2 Host.

Signed-off-by Ramiro Oliveira <[email protected]>

---
 .../devicetree/bindings/media/snps,dw-mipi-csi.txt |  37 ++++++++
 .../devicetree/bindings/media/snps,plat-ipk.txt    | 105 +++++++++++++++++++++
 2 files changed, 142 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt
 create mode 100644 Documentation/devicetree/bindings/media/snps,plat-ipk.txt

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +0 -0

new file mode 100644
index 0000000..1caa652

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +1 -0

+   as described in video-interfaces.txt[1].

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +0 -0

new file mode 100644
index 0000000..50e9279

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +9 -0

+
+Image sensor nodes
+------------------
+
+The sensor device nodes should be added to their control bus controller (e.g.
+I2C0) nodes and linked to a port node in the dw-mipi-csi,using the common video
+interfaces bindings, defined in video-interfaces.txt.
+
+Example:

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +56 -0

+				compatible = "ovti,ov5647";
+				reg = <0x36>;
+				port {
+					camera_1: endpoint {
+						remote-endpoint = <&csi1_ep1>;
+						clock-lanes = <0>;
+						data-lanes = <1 2 >;
+					};
+				};
+			};
+		};
+
+
+	camera {
+		compatible = "snps,plat-ipk", "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+			video_device: video-device@0x10000 {
+				compatible = "snps,video-device";
+				dmas = <&axi_vdma_0 0>;
+				dma-names = "vdma0";
+			};
+
+
+			csi2_1: csi2@0x03000 {
+				compatible = "snps,dw-mipi-csi";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = < 0x03000 0x7FF>;
+				interrupts = <2>;
+				data-lanes = <2>;
+				output-type = <2>;
+
+				phys = <&mipi_phy_ctrl1 0>;
+				phy-names = "csi2-dphy";
+
+				/*IPI Related Configurations*/
+				ipi-mode = <0>;
+				ipi-color-mode = <0>;
+				ipi-auto-flush = <1>;
+				virtual-channel = <0>;
+
+				/* Camera MIPI CSI-2 (CSI1) */
+				port@1 {
+					reg = <1>;
+					csi1_ep1: endpoint {
+						remote-endpoint = <&camera_1>;
+						data-lanes = <1 2>;
+						};
+				};
+			};
+		};
+	};
+
+The dw-mipi-csi device binding is defined in snps,dw-mipi-csi.txt.

Signature · 1 line

2.10.2

Quoted 22 lines · Ramiro Oliveira

Create device tree bindings documentation for Media and Video Device, as well as the DW MIPI CSI-2 Host.

Signed-off-by Ramiro Oliveira <[email protected]>

---
 .../devicetree/bindings/media/snps,dw-mipi-csi.txt |  37 ++++++++
 .../devicetree/bindings/media/snps,plat-ipk.txt    | 105 +++++++++++++++++++++
 2 files changed, 142 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt
 create mode 100644 Documentation/devicetree/bindings/media/snps,plat-ipk.txt

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +5 -0

new file mode 100644
index 0000000..1caa652
@@ -0,0 +1,37 @@
+Synopsys DesignWare CSI-2 Host controller
+
+Description
+-----------
+

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt line 10

Quoted 5 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +5 -0

+This HW block is used to receive image coming from an MIPI CSI-2 compatible
+camera.
+
+Required properties:
+- compatible: shall be "snps,dw-mipi-csi"

You don't have to add them, but this will need SoC specific compatible strings. Please add a note to that effect.

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt line 17

Quoted 7 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +7 -0

+- reg		: physical base address and size of the device memory mapped
+  registers;
+- interrupts	: CSI-2 Host interrupt
+- data-lanes    : Number of lanes to be used
+- output-type   : Core output to be used (IPI-> 0 or IDI->1 or BOTH->2) These
+  values choose which of the Core outputs will be used, it can be Image Data
+  Interface or Image Pixel Interface.

This is output to a parallel camera interface (e.g. an SoC camera subsystem)?

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt line 20

Quoted 3 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +3 -0

+- phys, phy-names: List of one PHY specifier and identifier string (as defined
+  in Documentation/devicetree/bindings/phy/phy-bindings.txt). This PHY is a MIPI
+  DPHY working in RX mode.

phy-names is pointless when there is only 1.

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt line 25

Quoted 5 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +5 -0

+
+Optional properties(if in IPI mode):
+- ipi-mode 	: Mode to be used when in IPI(Camera -> 0 or Automatic -> 1)
+  This property defines if the controller will use the video timings available
+  in the video stream or if it will use pre-defined ones.

"pre-defined" doesn't sound like the same thing as "automatic"?

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt line 33

Quoted 8 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +8 -0

+- ipi-color-mode: Bus depth to be used in IPI (48 bits -> 0 or 16 bits -> 1)
+  This property defines the width of the IPI bus.
+- ipi-auto-flush: Data auto-flush (1 -> Yes or 0 -> No). This property defines
+  if the data is automatically flushed in each vsync or if this process is done
+  manually
+- virtual-channel: Virtual channel where data is present when in IPI mode. This
+  property chooses the virtual channel which IPI will use to retrieve the video
+  stream.

All these properties seem like they should be common properties or are these interfaces something Synopsys specific? Or perhaps the interface is Synopsys specific, but determined by the CSI2 mode?

I think you need to define graph ports for the IPI and IDI interfaces and the connections. Then perhaps these properties become endpoint properties.

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt line 36

Quoted 3 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +3 -0

+
+The per-board settings:
+ - port sub-node describing a single endpoint connected to the dw-mipi-csi

Wouldn't the port connect to the camera?

Quoted 10 lines

Documentation/devicetree/bindings/media/snps,dw-mipi-csi.txt new file +1 -0

+   as described in video-interfaces.txt[1].

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +3 -0

new file mode 100644
index 0000000..50e9279
@@ -0,0 +1,105 @@
+Synopsys DesignWare CSI-2 Host IPK Media Device
+
+The Synopsys DesignWare CSI-2 Host IPK subsystem comprises of multiple

Documentation/devicetree/bindings/media/snps,plat-ipk.txt line 9

Quoted 6 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +6 -0

+sub-devices represented by separate device tree nodes. Currently this includes:
+plat-ipk, video-device, and dw-mipi-csi.
+
+The sub-subdevices are defined as child nodes of the common 'camera' node which
+also includes common properties of the whole subsystem not really specific to
+any single sub-device.

But you don't have any properties defined for the camera node.

Quoted 8 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +8 -0

+
+Common 'camera' node
+--------------------
+
+Required properties:
+
+- compatible: must be "snps,plat-ipk", "simple-bus"
+

Documentation/devicetree/bindings/media/snps,plat-ipk.txt line 22

Quoted 5 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +5 -0

+The 'camera' node must include at least one 'video-device' and one 'dw-mipi-csi'
+child node.
+
+'video-device' device nodes
+-------------------

Is this a separate block? DMA with no registers is strange. I'm having a hard time understanding a complete block diagram.

Documentation/devicetree/bindings/media/snps,plat-ipk.txt line 26

Quoted 4 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +4 -0

+
+Required properties:
+
+- compatible: "snps,video-device"

Kind of generic. The IP block is called just "video device"?

Documentation/devicetree/bindings/media/snps,plat-ipk.txt line 30

Quoted 4 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +4 -0

+- dmas, dma-names: List of one DMA specifier and identifier string (as defined
+  in Documentation/devicetree/bindings/dma/dma.txt) per port. Each port
+  requires a DMA channel with the identifier string set to "port" followed by
+  the port index.

port is not what you used in the example.

Quoted 13 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +13 -0

+
+Image sensor nodes
+------------------
+
+The sensor device nodes should be added to their control bus controller (e.g.
+I2C0) nodes and linked to a port node in the dw-mipi-csi,using the common video
+interfaces bindings, defined in video-interfaces.txt.
+
+Example:
+
+	i2c@0x02000 {
+			compatible = "snps,designware-i2c";
+			#address-cells = <1>;

Documentation/devicetree/bindings/media/snps,plat-ipk.txt line 49

Quoted 6 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +6 -0

+			#size-cells = <0>;
+			reg = <0x02000 0x100>;
+			clock-frequency = <400000>;
+			clocks = <&i2cclk>;
+			interrupts =<0>;
+			ov: camera@0x36 {

Drop the '0x' on unit addresses.

Quoted 60 lines

Documentation/devicetree/bindings/media/snps,plat-ipk.txt new file +56 -0

+				compatible = "ovti,ov5647";
+				reg = <0x36>;
+				port {
+					camera_1: endpoint {
+						remote-endpoint = <&csi1_ep1>;
+						clock-lanes = <0>;
+						data-lanes = <1 2 >;
+					};
+				};
+			};
+		};
+
+
+	camera {
+		compatible = "snps,plat-ipk", "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+			video_device: video-device@0x10000 {
+				compatible = "snps,video-device";
+				dmas = <&axi_vdma_0 0>;
+				dma-names = "vdma0";
+			};
+
+
+			csi2_1: csi2@0x03000 {
+				compatible = "snps,dw-mipi-csi";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = < 0x03000 0x7FF>;
+				interrupts = <2>;
+				data-lanes = <2>;
+				output-type = <2>;
+
+				phys = <&mipi_phy_ctrl1 0>;
+				phy-names = "csi2-dphy";
+
+				/*IPI Related Configurations*/
+				ipi-mode = <0>;
+				ipi-color-mode = <0>;
+				ipi-auto-flush = <1>;
+				virtual-channel = <0>;
+
+				/* Camera MIPI CSI-2 (CSI1) */
+				port@1 {
+					reg = <1>;
+					csi1_ep1: endpoint {
+						remote-endpoint = <&camera_1>;
+						data-lanes = <1 2>;
+						};
+				};
+			};
+		};
+	};
+
+The dw-mipi-csi device binding is defined in snps,dw-mipi-csi.txt.

Signature · 1 line

2.10.2

Add support for the DesignWare CSI-2 Host IP Prototyping Kit

Signed-off-by Ramiro Oliveira <roliveir-HKixBCOQz3hWk0Htik3J/[email protected]>

---
 MAINTAINERS                                 |   7 +
 drivers/media/platform/Kconfig              |   1 +
 drivers/media/platform/Makefile             |   2 +
 drivers/media/platform/dwc/Kconfig          |  36 ++
 drivers/media/platform/dwc/Makefile         |   3 +
 drivers/media/platform/dwc/dw_mipi_csi.c    | 647 ++++++++++++++++++++++
 drivers/media/platform/dwc/dw_mipi_csi.h    | 180 ++++++
 drivers/media/platform/dwc/plat_ipk.c       | 818 ++++++++++++++++++++++++++++
 drivers/media/platform/dwc/plat_ipk.h       | 101 ++++
 drivers/media/platform/dwc/plat_ipk_video.h |  97 ++++
 drivers/media/platform/dwc/video_device.c   | 707 ++++++++++++++++++++++++
 drivers/media/platform/dwc/video_device.h   |  85 +++
 12 files changed, 2684 insertions(+)
 create mode 100644 drivers/media/platform/dwc/Kconfig
 create mode 100644 drivers/media/platform/dwc/Makefile
 create mode 100644 drivers/media/platform/dwc/dw_mipi_csi.c
 create mode 100644 drivers/media/platform/dwc/dw_mipi_csi.h
 create mode 100644 drivers/media/platform/dwc/plat_ipk.c
 create mode 100644 drivers/media/platform/dwc/plat_ipk.h
 create mode 100644 drivers/media/platform/dwc/plat_ipk_video.h
 create mode 100644 drivers/media/platform/dwc/video_device.c
 create mode 100644 drivers/media/platform/dwc/video_device.h

MAINTAINERS +7 -0

index 72e828a..73250b5 100644
@@ -10651,6 +10651,13 @@ S:	Maintained
 F:	drivers/staging/media/st-cec/
 F:	Documentation/devicetree/bindings/media/stih-cec.txt
 
+SYNOPSYS DESIGNWARE CSI-2 HOST IPK DRIVER
+M:	Ramiro Oliveira <roliveir-HKixBCOQz3hWk0Htik3J/[email protected]>
+L:	[email protected]
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	drivers/media/platform/dwc/
+
 SYNOPSYS DESIGNWARE DMAC DRIVER
 M:	Viresh Kumar <[email protected]>
 M:	Andy Shevchenko <andriy.shevchenko-VuQAYsv1563Yd54FQh9/[email protected]>

drivers/media/platform/Kconfig +1 -0

index d944421..7b99ba3 100644
@@ -120,6 +120,7 @@ source "drivers/media/platform/am437x/Kconfig"
 source "drivers/media/platform/xilinx/Kconfig"
 source "drivers/media/platform/rcar-vin/Kconfig"
 source "drivers/media/platform/atmel/Kconfig"
+source "drivers/media/platform/dwc/Kconfig"
 
 config VIDEO_TI_CAL
 	tristate "TI CAL (Camera Adaptation Layer) driver"

drivers/media/platform/Makefile +2 -0

index 5b3cb27..d84b1de 100644
@@ -62,6 +62,8 @@ obj-$(CONFIG_VIDEO_RCAR_VIN)		+= rcar-vin/
 
 obj-$(CONFIG_VIDEO_ATMEL_ISC)		+= atmel/
 
+obj-$(CONFIG_VIDEO_DWC)			+= dwc/
+
 ccflags-y += -I$(srctree)/drivers/media/i2c
 
 obj-$(CONFIG_VIDEO_MEDIATEK_VPU)	+= mtk-vpu/

drivers/media/platform/dwc/Kconfig new file +3 -0

new file mode 100644
index 0000000..fb8533b
@@ -0,0 +1,36 @@
+config VIDEO_DWC
+	bool "Designware Cores CSI-2 IPK (EXPERIMENTAL)"
+	depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA

drivers/media/platform/dwc/Kconfig new file +23 -0

+
+	  To compile this driver as a module, choose M here
+
+
+config DWC_MIPI_CSI2_HOST
+	tristate "SNPS DWC MIPI CSI2 Host"
+	select GENERIC_PHY
+	depends on VIDEO_DWC
+	help
+	  This is a V4L2 driver for SNPS DWC MIPI-CSI2
+
+	  To compile this driver as a module, choose M here
+
+config DWC_VIDEO_DEVICE
+	tristate "DWC VIDEO DEVICE"
+	select VIDEOBUF2_VMALLOC
+	select VIDEOBUF2_DMA_CONTIG
+	depends on VIDEO_DWC
+	help
+	  This is a V4L2 driver for SNPS Video device
+	  To compile this driver as a module, choose M here
+
+endif # VIDEO_DWC

drivers/media/platform/dwc/Makefile new file +3 -0

new file mode 100644
index 0000000..75c74b7
@@ -0,0 +1,3 @@
+obj-$(CONFIG_DWC_PLATFORM)		+= plat_ipk.o
+obj-$(CONFIG_DWC_MIPI_CSI2_HOST)	+= dw_mipi_csi.o
+obj-$(CONFIG_DWC_VIDEO_DEVICE)		+= video_device.o

drivers/media/platform/dwc/dw_mipi_csi.c new file +308 -0

new file mode 100644
index 0000000..6515afa
@@ -0,0 +1,647 @@
+/*
+ * DWC MIPI CSI-2 Host device driver
+ *
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ * Author: Ramiro Oliveira <ramiro.oliveira-HKixBCOQz3hWk0Htik3J/[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 2 of the License,
+ * or (at your option) any later version.
+ */
+
+#include "dw_mipi_csi.h"
+
+/**
+ * @short Video formats supported by the MIPI CSI-2
+ */
+static const struct mipi_fmt dw_mipi_csi_formats[] = {
+	{
+		/* RAW 8 */
+		.code = MEDIA_BUS_FMT_SBGGR8_1X8,
+		.depth = 8,
+	},
+	{
+		/* RAW 10 */
+		.code = MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE,
+		.depth = 10,
+	},
+	{
+		/* RGB 565 */
+		.code = MEDIA_BUS_FMT_RGB565_2X8_BE,
+		.depth = 16,
+	},
+	{
+		/* BGR 565 */
+		.code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+		.depth = 16,
+	},
+	{
+		/* RGB 888 */
+		.code = MEDIA_BUS_FMT_RGB888_2X12_LE,
+		.depth = 24,
+	},
+	{
+		/* BGR 888 */
+		.code = MEDIA_BUS_FMT_RGB888_2X12_BE,
+		.depth = 24,
+	},
+};
+
+static struct mipi_csi_dev *sd_to_mipi_csi_dev(struct v4l2_subdev *sdev)
+{
+	return container_of(sdev, struct mipi_csi_dev, sd);
+}
+
+static void dw_mipi_csi_write(struct mipi_csi_dev *dev,
+		  unsigned int address, unsigned int data)
+{
+	iowrite32(data, dev->base_address + address);
+}
+
+static u32 dw_mipi_csi_read(struct mipi_csi_dev *dev, unsigned long address)
+{
+	return ioread32(dev->base_address + address);
+}
+
+static void dw_mipi_csi_write_part(struct mipi_csi_dev *dev,
+		       unsigned long address, unsigned long data,
+		       unsigned char shift, unsigned char width)
+{
+	u32 mask = (1 << width) - 1;
+	u32 temp = dw_mipi_csi_read(dev, address);
+
+	temp &= ~(mask << shift);
+	temp |= (data & mask) << shift;
+	dw_mipi_csi_write(dev, address, temp);
+}
+
+static const struct mipi_fmt *
+find_dw_mipi_csi_format(struct v4l2_mbus_framefmt *mf)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(dw_mipi_csi_formats); i++)
+		if (mf->code == dw_mipi_csi_formats[i].code)
+			return &dw_mipi_csi_formats[i];
+	return NULL;
+}
+
+static void dw_mipi_csi_reset(struct mipi_csi_dev *dev)
+{
+	dw_mipi_csi_write(dev, R_CSI2_CTRL_RESETN, 0);
+	dw_mipi_csi_write(dev, R_CSI2_CTRL_RESETN, 1);
+}
+
+static int dw_mipi_csi_mask_irq_power_off(struct mipi_csi_dev *dev)
+{
+	/* set only one lane (lane 0) as active (ON) */
+	dw_mipi_csi_write(dev, R_CSI2_N_LANES, 0);
+
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PHY_FATAL, 0);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PKT_FATAL, 0);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_FRAME_FATAL, 0);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PHY, 0);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PKT, 0);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_LINE, 0);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_IPI, 0);
+
+	dw_mipi_csi_write(dev, R_CSI2_CTRL_RESETN, 0);
+
+	return 0;
+
+}
+
+static int dw_mipi_csi_hw_stdby(struct mipi_csi_dev *dev)
+{
+	/* set only one lane (lane 0) as active (ON) */
+	dw_mipi_csi_reset(dev);
+
+	dw_mipi_csi_write(dev, R_CSI2_N_LANES, 0);
+
+	phy_init(dev->phy);
+
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PHY_FATAL, 0xFFFFFFFF);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PKT_FATAL, 0xFFFFFFFF);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_FRAME_FATAL, 0xFFFFFFFF);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PHY, 0xFFFFFFFF);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_PKT, 0xFFFFFFFF);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_LINE, 0xFFFFFFFF);
+	dw_mipi_csi_write(dev, R_CSI2_MASK_INT_IPI, 0xFFFFFFFF);
+
+	return 0;
+
+}
+
+static void dw_mipi_csi_set_ipi_fmt(struct mipi_csi_dev *csi_dev)
+{
+	struct device *dev = &csi_dev->pdev->dev;
+
+	switch (csi_dev->fmt->code) {
+	case MEDIA_BUS_FMT_RGB565_2X8_BE:
+	case MEDIA_BUS_FMT_RGB565_2X8_LE:
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_DATA_TYPE, CSI_2_RGB565);
+		dev_dbg(dev, "DT: RGB 565");
+		break;
+
+	case MEDIA_BUS_FMT_RGB888_2X12_LE:
+	case MEDIA_BUS_FMT_RGB888_2X12_BE:
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_DATA_TYPE, CSI_2_RGB888);
+		dev_dbg(dev, "DT: RGB 888");
+		break;
+	case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_DATA_TYPE, CSI_2_RAW10);
+		dev_dbg(dev, "DT: RAW 10");
+		break;
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_DATA_TYPE, CSI_2_RAW8);
+		dev_dbg(dev, "DT: RAW 8");
+		break;
+	default:
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_DATA_TYPE, CSI_2_RGB565);
+		dev_dbg(dev, "Error");
+		break;
+	}
+}
+
+static void __dw_mipi_csi_fill_timings(struct mipi_csi_dev *dev,
+			   const struct v4l2_bt_timings *bt)
+{
+
+	if (bt == NULL)
+		return;
+
+	dev->hw.hsa = bt->hsync;
+	dev->hw.hbp = bt->hbackporch;
+	dev->hw.hsd = bt->hsync;
+	dev->hw.htotal = bt->height + bt->vfrontporch +
+	    bt->vsync + bt->vbackporch;
+	dev->hw.vsa = bt->vsync;
+	dev->hw.vbp = bt->vbackporch;
+	dev->hw.vfp = bt->vfrontporch;
+	dev->hw.vactive = bt->height;
+}
+
+static void dw_mipi_csi_start(struct mipi_csi_dev *csi_dev)
+{
+	const struct v4l2_bt_timings *bt = &v4l2_dv_timings_presets[0].bt;
+	struct device *dev = &csi_dev->pdev->dev;
+
+	__dw_mipi_csi_fill_timings(csi_dev, bt);
+
+	dw_mipi_csi_write(csi_dev, R_CSI2_N_LANES, (csi_dev->hw.num_lanes - 1));
+	dev_dbg(dev, "N Lanes: %d\n", csi_dev->hw.num_lanes);
+
+	/*IPI Related Configuration */
+	if ((csi_dev->hw.output_type == IPI_OUT)
+	    || (csi_dev->hw.output_type == BOTH_OUT)) {
+
+		dw_mipi_csi_write_part(csi_dev, R_CSI2_IPI_MODE,
+					csi_dev->hw.ipi_mode, 0, 1);
+		dev_dbg(dev, "IPI MODE: %d\n", csi_dev->hw.ipi_mode);
+
+		dw_mipi_csi_write_part(csi_dev, R_CSI2_IPI_MODE,
+				       csi_dev->hw.ipi_color_mode, 8, 1);
+		dev_dbg(dev, "Color Mode: %d\n", csi_dev->hw.ipi_color_mode);
+
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_VCID,
+					csi_dev->hw.virtual_ch);
+		dev_dbg(dev, "Virtual Channel: %d\n", csi_dev->hw.virtual_ch);
+
+		dw_mipi_csi_write_part(csi_dev, R_CSI2_IPI_MEM_FLUSH,
+				       csi_dev->hw.ipi_auto_flush, 8, 1);
+		dev_dbg(dev, "Auto-flush: %d\n", csi_dev->hw.ipi_auto_flush);
+
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_HSA_TIME,
+					csi_dev->hw.hsa);
+		dev_dbg(dev, "HSA: %d\n", csi_dev->hw.hsa);
+
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_HBP_TIME,
+					csi_dev->hw.hbp);
+		dev_dbg(dev, "HBP: %d\n", csi_dev->hw.hbp);
+
+		dw_mipi_csi_write(csi_dev, R_CSI2_IPI_HSD_TIME,
+					csi_dev->hw.hsd);
+		dev_dbg(dev, "HSD: %d\n", csi_dev->hw.hsd);
+
+		if (csi_dev->hw.ipi_mode == AUTO_TIMING) {
+			dw_mipi_csi_write(csi_dev, R_CSI2_IPI_HLINE_TIME,
+					  csi_dev->hw.htotal);
+			dev_dbg(dev, "H total: %d\n", csi_dev->hw.htotal);
+
+			dw_mipi_csi_write(csi_dev, R_CSI2_IPI_VSA_LINES,
+					  csi_dev->hw.vsa);
+			dev_dbg(dev, "VSA: %d\n", csi_dev->hw.vsa);
+
+			dw_mipi_csi_write(csi_dev, R_CSI2_IPI_VBP_LINES,
+					  csi_dev->hw.vbp);
+			dev_dbg(dev, "VBP: %d\n", csi_dev->hw.vbp);
+
+			dw_mipi_csi_write(csi_dev, R_CSI2_IPI_VFP_LINES,
+					  csi_dev->hw.vfp);
+			dev_dbg(dev, "VFP: %d\n", csi_dev->hw.vfp);
+
+			dw_mipi_csi_write(csi_dev, R_CSI2_IPI_VACTIVE_LINES,
+					  csi_dev->hw.vactive);
+			dev_dbg(dev, "V Active: %d\n", csi_dev->hw.vactive);
+		}
+	}
+
+	phy_power_on(csi_dev->phy);
+}
+
+static int dw_mipi_csi_enum_mbus_code(struct v4l2_subdev *sd,
+					struct v4l2_subdev_pad_config *cfg,
+					struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index >= ARRAY_SIZE(dw_mipi_csi_formats))
+		return -EINVAL;
+
+	code->code = dw_mipi_csi_formats[code->index].code;
+	return 0;
+}
+
+static struct mipi_fmt const *
+dw_mipi_csi_try_format(struct v4l2_mbus_framefmt *mf)
+{
+	struct mipi_fmt const *fmt;
+
+	fmt = find_dw_mipi_csi_format(mf);
+	if (fmt == NULL)
+		fmt = &dw_mipi_csi_formats[0];
+
+	mf->code = fmt->code;
+	return fmt;
+}
+
+static struct v4l2_mbus_framefmt *
+__dw_mipi_csi_get_format(struct mipi_csi_dev *dev,
+			 struct v4l2_subdev_pad_config *cfg,
+			 enum v4l2_subdev_format_whence which)
+{
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		return cfg ? v4l2_subdev_get_try_format(&dev->sd, cfg,
+							0) : NULL;
+
+	return &dev->format;
+}
+
+static int
+dw_mipi_csi_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
+		    struct v4l2_subdev_format *fmt)
+{
+	struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+	struct mipi_fmt const *dev_fmt;
+	struct v4l2_mbus_framefmt *mf;
+	unsigned int i = 0;
+	const struct v4l2_bt_timings *bt_r = &v4l2_dv_timings_presets[0].bt;
+
+	mf = __dw_mipi_csi_get_format(dev, cfg, fmt->which);
+
+	dev_fmt = dw_mipi_csi_try_format(&fmt->format);
+	if (dev_fmt) {
+		*mf = fmt->format;
+		if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+			dev->fmt = dev_fmt;
+		dw_mipi_csi_set_ipi_fmt(dev);
+	}
+	while (v4l2_dv_timings_presets[i].bt.width) {

drivers/media/platform/dwc/dw_mipi_csi.c new file +37 -0

+	return 0;
+
+}
+
+static int
+dw_mipi_csi_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
+		    struct v4l2_subdev_format *fmt)
+{
+	struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+	struct v4l2_mbus_framefmt *mf;
+
+	mf = __dw_mipi_csi_get_format(dev, cfg, fmt->which);
+	if (!mf)
+		return -EINVAL;
+
+	mutex_lock(&dev->lock);
+	fmt->format = *mf;
+	mutex_unlock(&dev->lock);
+	return 0;
+}
+
+static int
+dw_mipi_csi_s_power(struct v4l2_subdev *sd, int on)
+{
+	struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+
+	if (on) {
+		dw_mipi_csi_hw_stdby(dev);
+		dw_mipi_csi_start(dev);
+	} else {
+		dw_mipi_csi_mask_irq_power_off(dev);
+	}
+
+	return 0;
+}
+
+static int

drivers/media/platform/dwc/dw_mipi_csi.c new file +70 -0

+
+	return 0;
+}
+
+static const struct v4l2_subdev_internal_ops dw_mipi_csi_sd_internal_ops = {
+	.open = dw_mipi_csi_open,
+};
+
+static struct v4l2_subdev_core_ops dw_mipi_csi_core_ops = {
+	.s_power = dw_mipi_csi_s_power,
+};
+
+static struct v4l2_subdev_pad_ops dw_mipi_csi_pad_ops = {
+	.enum_mbus_code = dw_mipi_csi_enum_mbus_code,
+	.get_fmt = dw_mipi_csi_get_fmt,
+	.set_fmt = dw_mipi_csi_set_fmt,
+};
+
+static struct v4l2_subdev_ops dw_mipi_csi_subdev_ops = {
+	.core = &dw_mipi_csi_core_ops,
+	.pad = &dw_mipi_csi_pad_ops,
+};
+
+static irqreturn_t
+dw_mipi_csi_irq1(int irq, void *dev_id)
+{
+	struct mipi_csi_dev *csi_dev = dev_id;
+	u32 global_int_status, i_sts;
+	unsigned long flags;
+	struct device *dev = &csi_dev->pdev->dev;
+
+	global_int_status = dw_mipi_csi_read(csi_dev, R_CSI2_INTERRUPT);
+	spin_lock_irqsave(&csi_dev->slock, flags);
+
+	if (global_int_status & CSI2_INT_PHY_FATAL) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PHY_FATAL);
+		dev_dbg_ratelimited(dev, "CSI INT PHY FATAL: %08X\n", i_sts);
+	}
+
+	if (global_int_status & CSI2_INT_PKT_FATAL) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PKT_FATAL);
+		dev_dbg_ratelimited(dev, "CSI INT PKT FATAL: %08X\n", i_sts);
+	}
+
+	if (global_int_status & CSI2_INT_FRAME_FATAL) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_FRAME_FATAL);
+		dev_dbg_ratelimited(dev, "CSI INT FRAME FATAL: %08X\n", i_sts);
+	}
+
+	if (global_int_status & CSI2_INT_PHY) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PHY);
+		dev_dbg_ratelimited(dev, "CSI INT PHY: %08X\n", i_sts);
+	}
+
+	if (global_int_status & CSI2_INT_PKT) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PKT);
+		dev_dbg_ratelimited(dev, "CSI INT PKT: %08X\n", i_sts);
+	}
+
+	if (global_int_status & CSI2_INT_LINE) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_LINE);
+		dev_dbg_ratelimited(dev, "CSI INT LINE: %08X\n", i_sts);
+	}
+
+	if (global_int_status & CSI2_INT_IPI) {
+		i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_IPI);
+		dev_dbg_ratelimited(dev, "CSI INT IPI: %08X\n", i_sts);
+	}
+	spin_unlock_irqrestore(&csi_dev->slock, flags);
+	return IRQ_HANDLED;

drivers/media/platform/dwc/dw_mipi_csi.c new file +202 -0

+	ret = of_property_read_u32(node, "data-lanes", &dev->hw.num_lanes);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read data-lanes\n");
+		return ret;
+	}
+
+	ret = of_property_read_u32(node, "output-type", &dev->hw.output_type);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read output-type\n");
+		return ret;
+	}
+
+	ret = of_property_read_u32(node, "ipi-mode", &dev->hw.ipi_mode);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read ipi-mode\n");
+		return ret;
+	}
+
+	ret =
+	    of_property_read_u32(node, "ipi-auto-flush",
+				 &dev->hw.ipi_auto_flush);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read ipi-auto-flush\n");
+		return ret;
+	}
+
+	ret =
+	    of_property_read_u32(node, "ipi-color-mode",
+				 &dev->hw.ipi_color_mode);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read ipi-color-mode\n");
+		return ret;
+	}
+
+	ret =
+	    of_property_read_u32(node, "virtual-channel", &dev->hw.virtual_ch);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read virtual-channel\n");
+		return ret;
+	}
+
+	node = of_get_child_by_name(node, "port");
+	if (!node)
+		return -EINVAL;
+
+	ret = of_property_read_u32(node, "reg", &reg);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't read reg value\n");
+		return ret;
+	}
+	dev->index = reg - 1;
+
+	if (dev->index >= CSI_MAX_ENTITIES)
+		return -ENXIO;
+
+	return 0;
+}
+
+static const struct of_device_id dw_mipi_csi_of_match[];
+
+/**
+ * @short Initialization routine - Entry point of the driver
+ * @param[in] pdev pointer to the platform device structure
+ * @return 0 on success and a negative number on failure
+ * Refer to Linux errors.
+ */
+static int mipi_csi_probe(struct platform_device *pdev)
+{
+	const struct of_device_id *of_id;
+	struct device *dev = &pdev->dev;
+	struct resource *res = NULL;
+	struct mipi_csi_dev *mipi_csi;
+	int ret = -ENOMEM;
+
+	mipi_csi = devm_kzalloc(dev, sizeof(*mipi_csi), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	mutex_init(&mipi_csi->lock);
+	spin_lock_init(&mipi_csi->slock);
+	mipi_csi->pdev = pdev;
+
+	of_id = of_match_node(dw_mipi_csi_of_match, dev->of_node);
+	if (WARN_ON(of_id == NULL))
+		return -EINVAL;
+
+	ret = dw_mipi_csi_parse_dt(pdev, mipi_csi);
+	if (ret < 0)
+		return ret;
+
+	mipi_csi->phy = devm_phy_get(dev, "csi2-dphy");
+	if (IS_ERR(mipi_csi->phy)) {
+		dev_err(dev, "No DPHY available\n");
+		return PTR_ERR(mipi_csi->phy);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mipi_csi->base_address = devm_ioremap_resource(dev, res);
+
+	if (IS_ERR(mipi_csi->base_address)) {
+		dev_err(dev, "Base address not set.\n");
+		return PTR_ERR(mipi_csi->base_address);
+	}
+
+	mipi_csi->ctrl_irq_number = platform_get_irq(pdev, 0);
+	if (mipi_csi->ctrl_irq_number <= 0) {
+		dev_err(dev, "IRQ number not set.\n");
+		return mipi_csi->ctrl_irq_number;
+	}
+
+	ret = devm_request_irq(dev, mipi_csi->ctrl_irq_number,
+			       dw_mipi_csi_irq1, IRQF_SHARED,
+			       dev_name(dev), mipi_csi);
+	if (ret) {
+		dev_err(dev, "IRQ failed\n");
+		goto end;
+	}
+
+	v4l2_subdev_init(&mipi_csi->sd, &dw_mipi_csi_subdev_ops);
+	mipi_csi->sd.owner = THIS_MODULE;
+	snprintf(mipi_csi->sd.name, sizeof(mipi_csi->sd.name), "%s.%d",
+		 CSI_DEVICE_NAME, mipi_csi->index);
+	mipi_csi->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	mipi_csi->fmt = &dw_mipi_csi_formats[0];
+
+	mipi_csi->format.code = dw_mipi_csi_formats[0].code;
+	mipi_csi->format.width = MIN_WIDTH;
+	mipi_csi->format.height = MIN_HEIGHT;
+
+	mipi_csi->sd.entity.function = MEDIA_ENT_F_IO_V4L;
+	mipi_csi->pads[CSI_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+	mipi_csi->pads[CSI_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+	ret = media_entity_pads_init(&mipi_csi->sd.entity,
+				     CSI_PADS_NUM, mipi_csi->pads);
+
+	if (ret < 0) {
+		dev_err(dev, "Media Entity init failed\n");
+		goto entity_cleanup;
+	}
+
+	/* This allows to retrieve the platform device id by the host driver */
+	v4l2_set_subdevdata(&mipi_csi->sd, pdev);
+
+	/* .. and a pointer to the subdev. */
+	platform_set_drvdata(pdev, &mipi_csi->sd);
+
+	dw_mipi_csi_mask_irq_power_off(mipi_csi);
+	dev_info(dev, "DW MIPI CSI-2 Host registered successfully\n");
+	return 0;
+
+entity_cleanup:
+	media_entity_cleanup(&mipi_csi->sd.entity);
+end:
+	return ret;
+}
+
+/**
+ * @short Exit routine - Exit point of the driver
+ * @param[in] pdev pointer to the platform device structure
+ * @return 0 on success and a negative number on failure
+ * Refer to Linux errors.
+ */
+static int mipi_csi_remove(struct platform_device *pdev)
+{
+	struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+	struct mipi_csi_dev *mipi_csi = sd_to_mipi_csi_dev(sd);
+
+	dev_dbg(&pdev->dev, "Removing MIPI CSI-2 module\n");
+	media_entity_cleanup(&mipi_csi->sd.entity);
+
+	return 0;
+}
+
+/**
+ * @short of_device_id structure
+ */
+static const struct of_device_id dw_mipi_csi_of_match[] = {
+	{
+	 .compatible = "snps,dw-mipi-csi"},
+	{ /* sentinel */ },
+};
+
+MODULE_DEVICE_TABLE(of, dw_mipi_csi_of_match);
+
+/**
+ * @short Platform driver structure
+ */
+static struct platform_driver __refdata dw_mipi_csi_pdrv = {
+	.remove = mipi_csi_remove,
+	.probe = mipi_csi_probe,
+	.driver = {
+		   .name = CSI_DEVICE_NAME,
+		   .owner = THIS_MODULE,
+		   .of_match_table = dw_mipi_csi_of_match,
+		   },
+};
+
+module_platform_driver(dw_mipi_csi_pdrv);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ramiro Oliveira <roliveir-HKixBCOQz3hWk0Htik3J/[email protected]>");
+MODULE_DESCRIPTION("Synopsys DW MIPI CSI-2 Host driver");

drivers/media/platform/dwc/dw_mipi_csi.h new file +180 -0

new file mode 100644
index 0000000..610a01f
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef DW_MIPI_CSI_H_
+#define DW_MIPI_CSI_H_
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_graph.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/ratelimit.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/wait.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dv-timings.h>
+
+#include "plat_ipk_video.h"
+
+#define CSI_DEVICE_NAME	"dw-mipi-csi"
+
+/** @short DWC MIPI CSI-2 register addresses*/
+enum register_addresses {
+	R_CSI2_VERSION = 0x00,
+	R_CSI2_N_LANES = 0x04,
+	R_CSI2_CTRL_RESETN = 0x08,
+	R_CSI2_INTERRUPT = 0x0C,
+	R_CSI2_DATA_IDS_1 = 0x10,
+	R_CSI2_DATA_IDS_2 = 0x14,
+	R_CSI2_IPI_MODE = 0x80,
+	R_CSI2_IPI_VCID = 0x84,
+	R_CSI2_IPI_DATA_TYPE = 0x88,
+	R_CSI2_IPI_MEM_FLUSH = 0x8C,
+	R_CSI2_IPI_HSA_TIME = 0x90,
+	R_CSI2_IPI_HBP_TIME = 0x94,
+	R_CSI2_IPI_HSD_TIME = 0x98,
+	R_CSI2_IPI_HLINE_TIME = 0x9C,
+	R_CSI2_IPI_VSA_LINES = 0xB0,
+	R_CSI2_IPI_VBP_LINES = 0xB4,
+	R_CSI2_IPI_VFP_LINES = 0xB8,
+	R_CSI2_IPI_VACTIVE_LINES = 0xBC,
+	R_CSI2_INT_PHY_FATAL = 0xe0,
+	R_CSI2_MASK_INT_PHY_FATAL = 0xe4,
+	R_CSI2_FORCE_INT_PHY_FATAL = 0xe8,
+	R_CSI2_INT_PKT_FATAL = 0xf0,
+	R_CSI2_MASK_INT_PKT_FATAL = 0xf4,
+	R_CSI2_FORCE_INT_PKT_FATAL = 0xf8,
+	R_CSI2_INT_FRAME_FATAL = 0x100,
+	R_CSI2_MASK_INT_FRAME_FATAL = 0x104,
+	R_CSI2_FORCE_INT_FRAME_FATAL = 0x108,
+	R_CSI2_INT_PHY = 0x110,
+	R_CSI2_MASK_INT_PHY = 0x114,
+	R_CSI2_FORCE_INT_PHY = 0x118,
+	R_CSI2_INT_PKT = 0x120,
+	R_CSI2_MASK_INT_PKT = 0x124,
+	R_CSI2_FORCE_INT_PKT = 0x128,
+	R_CSI2_INT_LINE = 0x130,
+	R_CSI2_MASK_INT_LINE = 0x134,
+	R_CSI2_FORCE_INT_LINE = 0x138,
+	R_CSI2_INT_IPI = 0x140,
+	R_CSI2_MASK_INT_IPI = 0x144,
+	R_CSI2_FORCE_INT_IPI = 0x148
+};
+
+/** @short IPI Data Types */
+enum data_type {
+	CSI_2_YUV420_8 = 0x18,
+	CSI_2_YUV420_10 = 0x19,
+	CSI_2_YUV420_8_LEG = 0x1A,
+	CSI_2_YUV420_8_SHIFT = 0x1C,
+	CSI_2_YUV420_10_SHIFT = 0x1D,
+	CSI_2_YUV422_8 = 0x1E,
+	CSI_2_YUV422_10 = 0x1F,
+	CSI_2_RGB444 = 0x20,
+	CSI_2_RGB555 = 0x21,
+	CSI_2_RGB565 = 0x22,
+	CSI_2_RGB666 = 0x23,
+	CSI_2_RGB888 = 0x24,
+	CSI_2_RAW6 = 0x28,
+	CSI_2_RAW7 = 0x29,
+	CSI_2_RAW8 = 0x2A,
+	CSI_2_RAW10 = 0x2B,
+	CSI_2_RAW12 = 0x2C,
+	CSI_2_RAW14 = 0x2D,
+};
+
+/** @short Interrupt Masks */
+enum interrupt_type {
+	CSI2_INT_PHY_FATAL = 1 << 0,
+	CSI2_INT_PKT_FATAL = 1 << 1,
+	CSI2_INT_FRAME_FATAL = 1 << 2,
+	CSI2_INT_PHY = 1 << 16,
+	CSI2_INT_PKT = 1 << 17,
+	CSI2_INT_LINE = 1 << 18,
+	CSI2_INT_IPI = 1 << 19,
+
+};
+
+/** @short DWC MIPI CSI-2 output types*/
+enum output_type {
+	IPI_OUT = 0,
+	IDI_OUT = 1,
+	BOTH_OUT = 2
+};
+
+/** @short IPI output types*/
+enum ipi_output_type {
+	CAMERA_TIMING = 0,
+	AUTO_TIMING = 1
+};
+
+/**
+ * @short Format template
+ */
+struct mipi_fmt {
+	u32 code;
+	u8 depth;
+};
+
+struct csi_hw {
+
+	uint32_t num_lanes;
+	uint32_t output_type;
+
+	/*IPI Info */
+	uint32_t ipi_mode;
+	uint32_t ipi_color_mode;
+	uint32_t ipi_auto_flush;
+	uint32_t virtual_ch;
+
+	uint32_t hsa;
+	uint32_t hbp;
+	uint32_t hsd;
+	uint32_t htotal;
+
+	uint32_t vsa;
+	uint32_t vbp;
+	uint32_t vfp;
+	uint32_t vactive;
+};
+
+/**
+ * @short Structure to embed device driver information
+ */
+struct mipi_csi_dev {
+	struct v4l2_subdev sd;
+	struct video_device vdev;
+
+	struct mutex lock;
+	spinlock_t slock;
+	struct media_pad pads[CSI_PADS_NUM];
+	struct platform_device *pdev;
+	u8 index;
+
+	/** Store current format */
+	const struct mipi_fmt *fmt;
+	struct v4l2_mbus_framefmt format;
+
+	/** Device Tree Information */
+	void __iomem *base_address;
+	uint32_t ctrl_irq_number;
+
+	struct csi_hw hw;
+
+	struct phy *phy;
+};
+
+#endif				/* DW_MIPI_CSI */

drivers/media/platform/dwc/plat_ipk.c new file +0 -0

new file mode 100644
index 0000000..02dcf36

drivers/media/platform/dwc/plat_ipk.c new file +816 -0

+ *
+ * Based on Omnivision OV7670 Camera Driver
+ * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
+ * Author: Sylwester Nawrocki <[email protected]>
+ *
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ * Author: Ramiro Oliveira <ramiro.oliveira-HKixBCOQz3hWk0Htik3J/[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 2 of the License,
+ * or (at your option) any later version.
+ */
+
+#include "plat_ipk.h"
+
+static int
+__plat_ipk_pipeline_s_format(struct plat_ipk_media_pipeline *ep,
+			     struct v4l2_subdev_format *fmt)
+{
+
+	struct plat_ipk_pipeline *p = to_plat_ipk_pipeline(ep);
+	static const u8 seq[IDX_MAX] = {IDX_SENSOR, IDX_CSI, IDX_VDEV};
+
+	fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
+	v4l2_subdev_call(p->subdevs[seq[IDX_CSI]], pad, set_fmt, NULL, fmt);
+
+	return 0;
+}
+
+static void
+plat_ipk_pipeline_prepare(struct plat_ipk_pipeline *p, struct media_entity *me)
+{
+	struct v4l2_subdev *sd;
+	unsigned int i = 0;
+
+	for (i = 0; i < IDX_MAX; i++)
+		p->subdevs[i] = NULL;
+
+	while (1) {
+		struct media_pad *pad = NULL;
+
+		for (i = 0; i < me->num_pads; i++) {
+			struct media_pad *spad = &me->pads[i];
+
+			if (!(spad->flags & MEDIA_PAD_FL_SINK))
+				continue;
+
+			pad = media_entity_remote_pad(spad);
+			if (pad)
+				break;
+		}
+		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
+			break;
+
+		sd = media_entity_to_v4l2_subdev(pad->entity);
+
+		switch (sd->grp_id) {
+		case GRP_ID_SENSOR:
+			p->subdevs[IDX_SENSOR] = sd;
+			break;
+		case GRP_ID_CSI:
+			p->subdevs[IDX_CSI] = sd;
+			break;
+		case GRP_ID_VIDEODEV:
+			p->subdevs[IDX_VDEV] = sd;
+			break;
+		default:
+			break;
+		}
+		me = &sd->entity;
+		if (me->num_pads == 1)
+			break;
+	}
+}
+
+static int __subdev_set_power(struct v4l2_subdev *sd, int on)
+{
+	int *use_count;
+	int ret;
+
+	if (sd == NULL) {
+		pr_err("null subdev\n");
+		return -ENXIO;
+	}
+	use_count = &sd->entity.use_count;
+	if (on && (*use_count)++ > 0)
+		return 0;
+	else if (!on && (*use_count == 0 || --(*use_count) > 0))
+		return 0;
+
+	ret = v4l2_subdev_call(sd, core, s_power, on);
+
+	return ret != -ENOIOCTLCMD ? ret : 0;
+}
+
+static int plat_ipk_pipeline_s_power(struct plat_ipk_pipeline *p, bool on)
+{
+	static const u8 seq[IDX_MAX] = {IDX_CSI, IDX_SENSOR, IDX_VDEV};
+	int i, ret = 0;
+
+	for (i = 0; i < IDX_MAX; i++) {
+		unsigned int idx = seq[i];
+
+		if (p->subdevs[idx] == NULL)
+			pr_info("No device registered on %d\n", idx);
+		else {
+			ret = __subdev_set_power(p->subdevs[idx], on);
+			if (ret < 0 && ret != -ENXIO)
+				goto error;
+		}
+	}
+	return 0;
+error:
+	for (; i >= 0; i--) {
+		unsigned int idx = seq[i];
+
+		__subdev_set_power(p->subdevs[idx], !on);
+	}
+	return ret;
+}
+
+static int
+__plat_ipk_pipeline_open(struct plat_ipk_media_pipeline *ep,
+			 struct media_entity *me, bool prepare)
+{
+	struct plat_ipk_pipeline *p = to_plat_ipk_pipeline(ep);
+	int ret;
+
+	if (WARN_ON(p == NULL || me == NULL))
+		return -EINVAL;
+
+	if (prepare)
+		plat_ipk_pipeline_prepare(p, me);
+
+	ret = plat_ipk_pipeline_s_power(p, 1);
+	if (!ret)
+		return 0;
+
+	return ret;
+}
+
+static int __plat_ipk_pipeline_close(struct plat_ipk_media_pipeline *ep)
+{
+	struct plat_ipk_pipeline *p = to_plat_ipk_pipeline(ep);
+	int ret;
+
+	ret = plat_ipk_pipeline_s_power(p, 0);
+
+	return ret == -ENXIO ? 0 : ret;
+}
+
+static int
+__plat_ipk_pipeline_s_stream(struct plat_ipk_media_pipeline *ep, bool on)
+{
+	static const u8 seq[IDX_MAX] = {IDX_SENSOR, IDX_CSI, IDX_VDEV};
+	struct plat_ipk_pipeline *p = to_plat_ipk_pipeline(ep);
+	int i, ret = 0;
+
+	for (i = 0; i < IDX_MAX; i++) {
+		unsigned int idx = seq[i];
+
+		if (p->subdevs[idx] == NULL)
+			pr_debug("No device registered on %d\n", idx);
+		else {
+			ret =
+			    v4l2_subdev_call(p->subdevs[idx], video, s_stream,
+					     on);
+
+			if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+				goto error;
+		}
+	}
+	return 0;
+error:
+	for (; i >= 0; i--) {
+		unsigned int idx = seq[i];
+
+		v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
+	}
+	return ret;
+}
+
+static const struct plat_ipk_media_pipeline_ops plat_ipk_pipeline_ops = {
+	.open = __plat_ipk_pipeline_open,
+	.close = __plat_ipk_pipeline_close,
+	.set_format = __plat_ipk_pipeline_s_format,
+	.set_stream = __plat_ipk_pipeline_s_stream,
+};
+
+static struct plat_ipk_media_pipeline *
+plat_ipk_pipeline_create(struct plat_ipk_dev *plat_ipk)
+{
+	struct plat_ipk_pipeline *p;
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return NULL;
+
+	list_add_tail(&p->list, &plat_ipk->pipelines);
+
+	p->ep.ops = &plat_ipk_pipeline_ops;
+	return &p->ep;
+}
+
+static void
+plat_ipk_pipelines_free(struct plat_ipk_dev *plat_ipk)
+{
+	while (!list_empty(&plat_ipk->pipelines)) {
+		struct plat_ipk_pipeline *p;
+
+		p = list_entry(plat_ipk->pipelines.next, typeof(*p), list);
+		list_del(&p->list);
+		kfree(p);
+	}
+}
+
+static int
+plat_ipk_parse_port_node(struct plat_ipk_dev *plat_ipk,
+			 struct device_node *port, unsigned int index)
+{
+	struct device_node *rem, *ep;
+	struct v4l2_of_endpoint endpoint;
+	struct plat_ipk_source_info *pd = &plat_ipk->sensor[index].pdata;
+
+	/* Assume here a port node can have only one endpoint node. */
+	ep = of_get_next_child(port, NULL);
+	if (!ep)
+		return 0;
+
+	v4l2_of_parse_endpoint(ep, &endpoint);
+	if (WARN_ON(endpoint.base.port == 0) || index >= PLAT_MAX_SENSORS)
+		return -EINVAL;
+
+	pd->mux_id = endpoint.base.port - 1;
+
+	rem = of_graph_get_remote_port_parent(ep);
+	of_node_put(ep);
+	if (rem == NULL) {
+		dev_info(plat_ipk->dev,
+			  "Remote device at %s not found\n", ep->full_name);
+		return 0;
+	}
+
+	if (WARN_ON(index >= ARRAY_SIZE(plat_ipk->sensor)))
+		return -EINVAL;
+
+	plat_ipk->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF;
+	plat_ipk->sensor[index].asd.match.of.node = rem;
+	plat_ipk->async_subdevs[index] = &plat_ipk->sensor[index].asd;
+
+	plat_ipk->num_sensors++;
+
+	of_node_put(rem);
+	return 0;
+}
+
+
+static int plat_ipk_register_sensor_entities(struct plat_ipk_dev *plat_ipk)
+{
+	struct device_node *parent = plat_ipk->pdev->dev.of_node;
+	struct device_node *node;
+	int index = 0;
+	int ret;
+
+	plat_ipk->num_sensors = 0;
+
+	for_each_available_child_of_node(parent, node) {
+		struct device_node *port;
+
+		if (of_node_cmp(node->name, "csi2"))
+			continue;
+		port = of_get_next_child(node, NULL);
+		if (!port)
+			continue;
+
+		ret = plat_ipk_parse_port_node(plat_ipk, port, index);
+		if (ret < 0)
+			return ret;
+		index++;
+	}
+	return 0;
+}
+
+static int
+__of_get_port_id(struct device_node *np)
+{
+	u32 reg = 0;
+
+	np = of_get_child_by_name(np, "port");
+	if (!np)
+		return -EINVAL;
+	of_property_read_u32(np, "reg", &reg);
+
+	return reg - 1;
+}
+
+static int register_videodev_entity(struct plat_ipk_dev *plat_ipk,
+			 struct video_device_dev *vid_dev)
+{
+	struct v4l2_subdev *sd;
+	struct plat_ipk_media_pipeline *ep;
+	int ret;
+
+	sd = &vid_dev->subdev;
+	sd->grp_id = GRP_ID_VIDEODEV;
+
+	ep = plat_ipk_pipeline_create(plat_ipk);
+	if (!ep)
+		return -ENOMEM;
+
+	v4l2_set_subdev_hostdata(sd, ep);
+
+	ret = v4l2_device_register_subdev(&plat_ipk->v4l2_dev, sd);
+	if (!ret)
+		plat_ipk->vid_dev = vid_dev;
+	else
+		v4l2_err(&plat_ipk->v4l2_dev,
+			 "Failed to register Video Device\n");
+	return ret;
+}
+
+static int register_mipi_csi_entity(struct plat_ipk_dev *plat_ipk,
+			 struct platform_device *pdev, struct v4l2_subdev *sd)
+{
+	struct device_node *node = pdev->dev.of_node;
+	int id, ret;
+
+	id = node ? __of_get_port_id(node) : max(0, pdev->id);
+
+	if (WARN_ON(id < 0 || id >= CSI_MAX_ENTITIES))
+		return -ENOENT;
+
+	if (WARN_ON(plat_ipk->mipi_csi[id].sd))
+		return -EBUSY;
+
+	sd->grp_id = GRP_ID_CSI;
+	ret = v4l2_device_register_subdev(&plat_ipk->v4l2_dev, sd);
+
+	if (!ret)
+		plat_ipk->mipi_csi[id].sd = sd;
+	else
+		v4l2_err(&plat_ipk->v4l2_dev,
+			 "Failed to register MIPI-CSI.%d (%d)\n", id, ret);
+	return ret;
+}
+
+static int plat_ipk_register_platform_entity(struct plat_ipk_dev *plat_ipk,
+				struct platform_device *pdev, int plat_entity)
+{
+	struct device *dev = &pdev->dev;
+	int ret = -EPROBE_DEFER;
+	void *drvdata;
+
+	device_lock(dev);
+	if (!dev->driver || !try_module_get(dev->driver->owner))
+		goto dev_unlock;
+
+	drvdata = dev_get_drvdata(dev);
+
+	if (drvdata) {
+		switch (plat_entity) {
+		case IDX_VDEV:
+			ret = register_videodev_entity(plat_ipk, drvdata);
+			break;
+		case IDX_CSI:
+			ret = register_mipi_csi_entity(plat_ipk, pdev, drvdata);
+			break;
+		default:
+			ret = -ENODEV;
+		}
+	} else
+		dev_err(plat_ipk->dev, "%s no drvdata\n", dev_name(dev));
+	module_put(dev->driver->owner);
+dev_unlock:
+	device_unlock(dev);
+	if (ret == -EPROBE_DEFER)
+		dev_info(plat_ipk->dev,
+			 "deferring %s device registration\n", dev_name(dev));
+	else if (ret < 0)
+		dev_err(plat_ipk->dev,
+			"%s device registration failed (%d)\n", dev_name(dev),
+			ret);
+	return ret;
+}
+
+static int
+plat_ipk_register_platform_entities(struct plat_ipk_dev *plat_ipk,
+				    struct device_node *parent)
+{
+	struct device_node *node;
+	int ret = 0;
+
+	for_each_available_child_of_node(parent, node) {
+		struct platform_device *pdev;
+		int plat_entity = -1;
+
+		pdev = of_find_device_by_node(node);
+		if (!pdev)
+			continue;
+
+		if (!strcmp(node->name, VIDEODEV_OF_NODE_NAME))
+			plat_entity = IDX_VDEV;
+		else if (!strcmp(node->name, CSI_OF_NODE_NAME))
+			plat_entity = IDX_CSI;
+
+		if (plat_entity >= 0)
+			ret = plat_ipk_register_platform_entity(plat_ipk, pdev,
+								plat_entity);
+		put_device(&pdev->dev);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+static void
+plat_ipk_unregister_entities(struct plat_ipk_dev *plat_ipk)
+{
+	int i;
+	struct video_device_dev *dev = plat_ipk->vid_dev;
+
+	if (dev == NULL)
+		return;
+	v4l2_device_unregister_subdev(&dev->subdev);
+	dev->ve.pipe = NULL;
+	plat_ipk->vid_dev = NULL;
+
+	for (i = 0; i < CSI_MAX_ENTITIES; i++) {
+		if (plat_ipk->mipi_csi[i].sd == NULL)
+			continue;
+		v4l2_device_unregister_subdev(plat_ipk->mipi_csi[i].sd);
+		plat_ipk->mipi_csi[i].sd = NULL;
+	}
+
+	dev_info(plat_ipk->dev, "Unregistered all entities\n");
+}
+
+static int
+__plat_ipk_create_videodev_sink_links(struct plat_ipk_dev *plat_ipk,
+				      struct media_entity *source,
+				      int pad)
+{
+	struct media_entity *sink;
+	int ret = 0;
+
+	if (!plat_ipk->vid_dev)
+		return 0;
+
+	sink = &plat_ipk->vid_dev->subdev.entity;
+	ret = media_create_pad_link(source, pad, sink,
+				    CSI_PAD_SOURCE, MEDIA_LNK_FL_ENABLED);
+	if (ret)
+		return ret;
+
+	dev_dbg(plat_ipk->dev, "created link [%s] -> [%s]\n",
+		  source->name, sink->name);
+
+	return 0;
+}
+
+
+static int
+__plat_ipk_create_videodev_source_links(struct plat_ipk_dev *plat_ipk)
+{
+	struct media_entity *source, *sink;
+	int ret = 0;
+
+	struct video_device_dev *vid_dev = plat_ipk->vid_dev;
+
+	if (vid_dev == NULL)
+		return -ENODEV;
+
+	source = &vid_dev->subdev.entity;
+	sink = &vid_dev->ve.vdev.entity;
+
+	ret = media_create_pad_link(source, VIDEO_DEV_SD_PAD_SOURCE_DMA,
+				    sink, 0, MEDIA_LNK_FL_ENABLED);
+
+	dev_dbg(plat_ipk->dev, "created link [%s] -> [%s]\n",
+		  source->name, sink->name);
+	return ret;
+}
+
+static int
+plat_ipk_create_links(struct plat_ipk_dev *plat_ipk)
+{
+	struct v4l2_subdev *csi_sensor[CSI_MAX_ENTITIES] = { NULL };
+	struct v4l2_subdev *sensor, *csi;
+	struct media_entity *source;
+	struct plat_ipk_source_info *pdata;
+	int i, pad, ret = 0;
+
+	for (i = 0; i < plat_ipk->num_sensors; i++) {
+		if (plat_ipk->sensor[i].subdev == NULL)
+			continue;
+
+		sensor = plat_ipk->sensor[i].subdev;
+		pdata = v4l2_get_subdev_hostdata(sensor);
+		if (!pdata)
+			continue;
+
+		source = NULL;
+
+		csi = plat_ipk->mipi_csi[pdata->mux_id].sd;
+		if (WARN(csi == NULL, "MIPI-CSI interface specified but	dw-mipi-csi module is not loaded!\n"))
+			return -EINVAL;
+
+		pad = sensor->entity.num_pads - 1;
+		ret = media_create_pad_link(&sensor->entity, pad,
+					    &csi->entity, CSI_PAD_SINK,
+					    MEDIA_LNK_FL_IMMUTABLE |
+					    MEDIA_LNK_FL_ENABLED);
+
+		if (ret)
+			return ret;
+		dev_dbg(plat_ipk->dev, "created link [%s] -> [%s]\n",
+			  sensor->entity.name, csi->entity.name);
+
+		csi_sensor[pdata->mux_id] = sensor;
+	}
+
+	for (i = 0; i < CSI_MAX_ENTITIES; i++) {
+		if (plat_ipk->mipi_csi[i].sd == NULL) {
+			dev_info(plat_ipk->dev, "no link\n");
+			continue;
+		}
+
+		source = &plat_ipk->mipi_csi[i].sd->entity;
+		pad = VIDEO_DEV_SD_PAD_SINK_CSI;
+
+		ret = __plat_ipk_create_videodev_sink_links(plat_ipk, source,
+								pad);
+	}
+
+	ret = __plat_ipk_create_videodev_source_links(plat_ipk);
+	if (ret < 0)
+		return ret;
+
+	return ret;
+}
+
+static int __plat_ipk_modify_pipeline(struct media_entity *entity, bool enable)
+{
+	struct plat_ipk_video_entity *ve;
+	struct plat_ipk_pipeline *p;
+	struct video_device *vdev;
+	int ret;
+
+	vdev = media_entity_to_video_device(entity);
+
+	if (vdev->entity.use_count == 0)
+		return 0;
+
+	ve = vdev_to_plat_ipk_video_entity(vdev);
+	p = to_plat_ipk_pipeline(ve->pipe);
+
+	if (enable)
+		ret = __plat_ipk_pipeline_open(ve->pipe, entity, true);
+	else
+		ret = __plat_ipk_pipeline_close(ve->pipe);
+
+	if (ret == 0 && !enable)
+		memset(p->subdevs, 0, sizeof(p->subdevs));
+
+	return ret;
+}
+
+
+static int
+__plat_ipk_modify_pipelines(struct media_entity *entity, bool enable,
+			    struct media_entity_graph *graph)
+{
+	struct media_entity *entity_err = entity;
+	int ret;
+
+	media_entity_graph_walk_start(graph, entity);
+
+	while ((entity = media_entity_graph_walk_next(graph))) {
+		if (!is_media_entity_v4l2_video_device(entity))
+			continue;
+
+		ret = __plat_ipk_modify_pipeline(entity, enable);
+
+		if (ret < 0)
+			goto err;
+	}
+
+	return 0;
+
+err:
+	media_entity_graph_walk_start(graph, entity_err);
+
+	while ((entity_err = media_entity_graph_walk_next(graph))) {
+		if (!is_media_entity_v4l2_video_device(entity_err))
+			continue;
+
+		__plat_ipk_modify_pipeline(entity_err, !enable);
+
+		if (entity_err == entity)
+			break;
+	}
+
+	return ret;
+}
+
+static int
+plat_ipk_link_notify(struct media_link *link, unsigned int flags,
+		     unsigned int notification)
+{
+	struct media_entity_graph *graph =
+	    &container_of(link->graph_obj.mdev, struct plat_ipk_dev,
+			  media_dev)->link_setup_graph;
+	struct media_entity *sink = link->sink->entity;
+	int ret = 0;
+
+	if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
+		ret = media_entity_graph_walk_init(graph, link->graph_obj.mdev);
+		if (ret)
+			return ret;
+		if (!(flags & MEDIA_LNK_FL_ENABLED))
+			ret = __plat_ipk_modify_pipelines(sink, false, graph);
+
+	} else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
+		if (link->flags & MEDIA_LNK_FL_ENABLED)
+			ret = __plat_ipk_modify_pipelines(sink, true, graph);
+		media_entity_graph_walk_cleanup(graph);
+	}
+
+	return ret ? -EPIPE : 0;
+}
+
+static const struct media_device_ops plat_ipk_media_ops = {
+	.link_notify = plat_ipk_link_notify,
+};
+
+
+static int
+subdev_notifier_bound(struct v4l2_async_notifier *notifier,
+		      struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd)
+{
+	struct plat_ipk_dev *plat_ipk = notifier_to_plat_ipk(notifier);
+	struct plat_ipk_sensor_info *si = NULL;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(plat_ipk->sensor); i++)
+		if (plat_ipk->sensor[i].asd.match.of.node ==
+		    subdev->dev->of_node)
+			si = &plat_ipk->sensor[i];
+
+	if (si == NULL)
+		return -EINVAL;
+
+	v4l2_set_subdev_hostdata(subdev, &si->pdata);
+
+	subdev->grp_id = GRP_ID_SENSOR;
+
+	si->subdev = subdev;
+
+	dev_dbg(&plat_ipk->pdev->dev, "Registered sensor subdevice: %s (%d)\n",
+		  subdev->name, plat_ipk->num_sensors);
+
+	plat_ipk->num_sensors++;
+
+	return 0;
+}
+
+static int
+subdev_notifier_complete(struct v4l2_async_notifier *notifier)
+{
+	struct plat_ipk_dev *plat_ipk = notifier_to_plat_ipk(notifier);
+	int ret;
+
+	mutex_lock(&plat_ipk->media_dev.graph_mutex);
+
+	ret = plat_ipk_create_links(plat_ipk);
+	if (ret < 0)
+		goto unlock;
+
+	ret = v4l2_device_register_subdev_nodes(&plat_ipk->v4l2_dev);
+unlock:
+	mutex_unlock(&plat_ipk->media_dev.graph_mutex);
+	if (ret < 0)
+		return ret;
+
+	return media_device_register(&plat_ipk->media_dev);
+}
+
+static int plat_ipk_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct v4l2_device *v4l2_dev;
+	struct plat_ipk_dev *plat_ipk;
+	int ret;
+
+	dev_dbg(dev, "Installing DW MIPI CSI-2 IPK Platform module\n");
+
+	plat_ipk = devm_kzalloc(dev, sizeof(*plat_ipk), GFP_KERNEL);
+	if (!plat_ipk)
+		return -ENOMEM;
+
+	spin_lock_init(&plat_ipk->slock);
+	INIT_LIST_HEAD(&plat_ipk->pipelines);
+	plat_ipk->pdev = pdev;
+
+	strlcpy(plat_ipk->media_dev.model, "SNPS IPK Platform",
+		sizeof(plat_ipk->media_dev.model));
+	plat_ipk->media_dev.ops = &plat_ipk_media_ops;
+	plat_ipk->media_dev.dev = dev;
+
+	v4l2_dev = &plat_ipk->v4l2_dev;
+	v4l2_dev->mdev = &plat_ipk->media_dev;
+	strlcpy(v4l2_dev->name, "plat-ipk", sizeof(v4l2_dev->name));
+
+	media_device_init(&plat_ipk->media_dev);
+
+	ret = v4l2_device_register(dev, &plat_ipk->v4l2_dev);
+	if (ret < 0) {
+		v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, plat_ipk);
+
+	ret = plat_ipk_register_platform_entities(plat_ipk, dev->of_node);
+	if (ret)
+		goto err_m_ent;
+
+	ret = plat_ipk_register_sensor_entities(plat_ipk);
+	if (ret)
+		goto err_m_ent;
+
+	if (plat_ipk->num_sensors > 0) {
+		plat_ipk->subdev_notifier.subdevs = plat_ipk->async_subdevs;
+		plat_ipk->subdev_notifier.num_subdevs = plat_ipk->num_sensors;
+		plat_ipk->subdev_notifier.bound = subdev_notifier_bound;
+		plat_ipk->subdev_notifier.complete = subdev_notifier_complete;
+		plat_ipk->num_sensors = 0;
+
+		ret = v4l2_async_notifier_register(&plat_ipk->v4l2_dev,
+						   &plat_ipk->subdev_notifier);
+		if (ret)
+			goto err_m_ent;
+	}
+
+	return 0;
+
+err_m_ent:
+	plat_ipk_unregister_entities(plat_ipk);
+	media_device_unregister(&plat_ipk->media_dev);
+	media_device_cleanup(&plat_ipk->media_dev);
+	v4l2_device_unregister(&plat_ipk->v4l2_dev);
+	return ret;
+}
+
+static int plat_ipk_remove(struct platform_device *pdev)
+{
+	struct plat_ipk_dev *dev = platform_get_drvdata(pdev);
+
+	v4l2_async_notifier_unregister(&dev->subdev_notifier);
+
+	v4l2_device_unregister(&dev->v4l2_dev);
+	plat_ipk_unregister_entities(dev);
+	plat_ipk_pipelines_free(dev);
+	media_device_unregister(&dev->media_dev);
+	media_device_cleanup(&dev->media_dev);
+
+	dev_info(&pdev->dev, "Driver removed\n");
+
+	return 0;
+}
+
+/**
+ * @short of_device_id structure
+ */
+static const struct of_device_id plat_ipk_of_match[] = {
+	{.compatible = "snps,plat-ipk"},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, plat_ipk_of_match);
+
+/**
+ * @short Platform driver structure
+ */
+static struct platform_driver plat_ipk_pdrv = {
+	.remove = plat_ipk_remove,
+	.probe = plat_ipk_probe,
+	.driver = {
+		   .name = "snps,plat-ipk",
+		   .owner = THIS_MODULE,
+		   .of_match_table = plat_ipk_of_match,
+		   },
+};
+
+static int __init
+plat_ipk_init(void)
+{
+	request_module("dw-mipi-csi");
+
+	return platform_driver_register(&plat_ipk_pdrv);
+}
+
+static void __exit
+plat_ipk_exit(void)
+{
+	platform_driver_unregister(&plat_ipk_pdrv);
+}
+
+module_init(plat_ipk_init);
+module_exit(plat_ipk_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ramiro Oliveira <roliveir-HKixBCOQz3hWk0Htik3J/[email protected]>");
+MODULE_DESCRIPTION("Platform driver for MIPI CSI-2 Host IPK");

drivers/media/platform/dwc/plat_ipk.h new file +101 -0

new file mode 100644
index 0000000..ff2f98b
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef PLAT_IPK_H_
+#define PLAT_IPK_H_
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <media/media-entity.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
+#include <media/v4l2-subdev.h>
+
+#include "dw_mipi_csi.h"
+#include "plat_ipk_video.h"
+#include "video_device.h"
+
+#define VIDEODEV_OF_NODE_NAME	"video-device"
+#define CSI_OF_NODE_NAME	"csi2"
+
+enum plat_ipk_subdev_index {
+	IDX_SENSOR,
+	IDX_CSI,
+	IDX_VDEV,
+	IDX_MAX,
+};
+
+struct plat_ipk_sensor_info {
+	struct plat_ipk_source_info pdata;
+	struct v4l2_async_subdev asd;
+	struct v4l2_subdev *subdev;
+	struct mipi_csi_dev *host;
+};
+
+struct plat_ipk_pipeline {
+	struct plat_ipk_media_pipeline ep;
+	struct list_head list;
+	struct media_entity *vdev_entity;
+	struct v4l2_subdev *subdevs[IDX_MAX];
+};
+
+#define to_plat_ipk_pipeline(_ep)\
+	 container_of(_ep, struct plat_ipk_pipeline, ep)
+
+struct mipi_csi_info {
+	struct v4l2_subdev *sd;
+	int id;
+};
+
+/**
+ * @short Structure to embed device driver information
+ */
+struct plat_ipk_dev {
+	struct mipi_csi_info		mipi_csi[CSI_MAX_ENTITIES];
+	struct video_device_dev		*vid_dev;
+	struct device			*dev;
+	struct media_device		media_dev;
+	struct v4l2_device		v4l2_dev;
+	struct platform_device		*pdev;
+	struct plat_ipk_sensor_info	sensor[PLAT_MAX_SENSORS];
+	struct v4l2_async_notifier	subdev_notifier;
+	struct v4l2_async_subdev	*async_subdevs[PLAT_MAX_SENSORS];
+	spinlock_t			slock;
+	struct list_head		pipelines;
+	int				num_sensors;
+	struct media_entity_graph	link_setup_graph;
+};
+
+static inline struct plat_ipk_dev *
+entity_to_plat_ipk_mdev(struct media_entity *me)
+{
+	return me->graph_obj.mdev == NULL ? NULL :
+	    container_of(me->graph_obj.mdev, struct plat_ipk_dev, media_dev);
+}
+
+static inline struct plat_ipk_dev *
+notifier_to_plat_ipk(struct v4l2_async_notifier *n)
+{
+	return container_of(n, struct plat_ipk_dev, subdev_notifier);
+}
+
+static inline void
+plat_ipk_graph_unlock(struct plat_ipk_video_entity *ve)
+{
+	mutex_unlock(&ve->vdev.entity.graph_obj.mdev->graph_mutex);
+}
+
+#endif				/* PLAT_IPK_H_ */

drivers/media/platform/dwc/plat_ipk_video.h new file +97 -0

new file mode 100644
index 0000000..9956ead
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef PLAT_IPK_INCLUDES_H_
+#define PLAT_IPK_INCLUDES_H_
+
+#include <media/media-entity.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-mediabus.h>
+#include <media/v4l2-subdev.h>
+
+/*
+ * The subdevices' group IDs.
+ */
+
+#define MAX_WIDTH	3280
+#define MAX_HEIGHT	1852
+
+#define MIN_WIDTH	640
+#define MIN_HEIGHT	480
+
+#define GRP_ID_SENSOR		(10)
+#define GRP_ID_CSI		(20)
+#define GRP_ID_VIDEODEV		(30)
+
+#define CSI_MAX_ENTITIES	1
+#define PLAT_MAX_SENSORS	1
+
+enum video_dev_pads {
+	VIDEO_DEV_SD_PAD_SINK_CSI = 0,
+	VIDEO_DEV_SD_PAD_SOURCE_DMA = 1,
+	VIDEO_DEV_SD_PADS_NUM = 2,
+};
+
+enum mipi_csi_pads {
+	CSI_PAD_SINK = 0,
+	CSI_PAD_SOURCE = 1,
+	CSI_PADS_NUM = 2,
+};
+
+struct plat_ipk_source_info {
+	u16 flags;
+	u16 mux_id;
+};
+
+struct plat_ipk_fmt {
+	char *name;
+	u32 mbus_code;
+	u32 fourcc;
+	u8 depth;
+};
+
+struct plat_ipk_media_pipeline;
+
+/*
+ * Media pipeline operations to be called from within a video node,  i.e. the
+ * last entity within the pipeline. Implemented by related media device driver.
+ */
+struct plat_ipk_media_pipeline_ops {
+	int (*prepare)(struct plat_ipk_media_pipeline *p,
+			struct media_entity *me);
+	int (*unprepare)(struct plat_ipk_media_pipeline *p);
+	int (*open)(struct plat_ipk_media_pipeline *p,
+			struct media_entity *me, bool resume);
+	int (*close)(struct plat_ipk_media_pipeline *p);
+	int (*set_stream)(struct plat_ipk_media_pipeline *p, bool state);
+	int (*set_format)(struct plat_ipk_media_pipeline *p,
+			struct v4l2_subdev_format *fmt);
+};
+
+struct plat_ipk_video_entity {
+	struct video_device vdev;
+	struct plat_ipk_media_pipeline *pipe;
+};
+
+struct plat_ipk_media_pipeline {
+	struct media_pipeline mp;
+	const struct plat_ipk_media_pipeline_ops *ops;
+};
+
+static inline struct plat_ipk_video_entity *
+vdev_to_plat_ipk_video_entity(struct video_device *vdev)
+{
+	return container_of(vdev, struct plat_ipk_video_entity, vdev);
+}
+
+#define plat_ipk_pipeline_call(ent, op, args...)\
+	(!(ent) ? -ENOENT : (((ent)->pipe->ops && (ent)->pipe->ops->op) ? \
+	(ent)->pipe->ops->op(((ent)->pipe), ##args) : -ENOIOCTLCMD))	  \
+
+
+#endif				/* PLAT_IPK_INCLUDES_H_ */

drivers/media/platform/dwc/video_device.c new file +26 -0

new file mode 100644
index 0000000..8e7033c
@@ -0,0 +1,707 @@
+/*
+ * DWC MIPI CSI-2 Host IPK video device device driver
+ *
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ * Author: Ramiro Oliveira <ramiro.oliveira-HKixBCOQz3hWk0Htik3J/[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 2 of the License,
+ * or (at your option) any later version.
+ */
+
+#include "video_device.h"
+
+static const struct plat_ipk_fmt vid_dev_formats[] = {
+	{
+		.name = "BGR888",
+		.fourcc = V4L2_PIX_FMT_BGR24,
+		.depth = 24,
+		.mbus_code = MEDIA_BUS_FMT_RGB888_2X12_LE,
+	}, {
+		.name = "RGB565",
+		.fourcc = V4L2_PIX_FMT_RGB565,
+		.depth = 16,
+		.mbus_code = MEDIA_BUS_FMT_RGB565_2X8_BE,
+	},

drivers/media/platform/dwc/video_device.c new file +14 -0

+
+	for (i = 0; i < ARRAY_SIZE(vid_dev_formats); ++i) {
+		fmt = &vid_dev_formats[i];
+		if (fmt->fourcc == f->fmt.pix.pixelformat)
+			return fmt;
+	}
+	return NULL;
+}
+
+/*
+ * Video node ioctl operations
+ */
+static int
+vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap)

drivers/media/platform/dwc/video_device.c new file +4 -0

+	return 0;
+}
+
+static int

drivers/media/platform/dwc/video_device.c new file +78 -0

+
+	return 0;
+}
+
+static int
+vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
+{
+	const struct plat_ipk_fmt *fmt;
+
+	fmt = vid_dev_find_format(f, -1);
+	if (!fmt) {
+		f->fmt.pix.pixelformat = V4L2_PIX_FMT_RGB565;
+		fmt = vid_dev_find_format(f, -1);
+	}
+
+	f->fmt.pix.field = V4L2_FIELD_NONE;
+	v4l_bound_align_image(&f->fmt.pix.width, 48, MAX_WIDTH, 2,
+			      &f->fmt.pix.height, 32, MAX_HEIGHT, 0, 0);
+
+	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
+	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+	f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+	return 0;
+}
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+					struct v4l2_format *f)
+{
+	struct video_device_dev *dev = video_drvdata(file);
+	int ret;
+	struct v4l2_subdev_format fmt;
+	struct v4l2_pix_format *dev_fmt_pix = &dev->format.fmt.pix;
+
+	if (vb2_is_busy(&dev->vb_queue))
+		return -EBUSY;
+
+	ret = vidioc_try_fmt_vid_cap(file, dev, f);
+	if (ret)
+		return ret;
+
+	dev->fmt = vid_dev_find_format(f, -1);
+	dev_fmt_pix->pixelformat = f->fmt.pix.pixelformat;
+	dev_fmt_pix->width = f->fmt.pix.width;
+	dev_fmt_pix->height  = f->fmt.pix.height;
+	dev_fmt_pix->bytesperline = dev_fmt_pix->width * (dev->fmt->depth / 8);
+	dev_fmt_pix->sizeimage =
+			dev_fmt_pix->height * dev_fmt_pix->bytesperline;
+
+	fmt.format.colorspace = V4L2_COLORSPACE_SRGB;
+	fmt.format.code = dev->fmt->mbus_code;
+
+	fmt.format.width = dev_fmt_pix->width;
+	fmt.format.height = dev_fmt_pix->height;
+
+	ret = plat_ipk_pipeline_call(&dev->ve, set_format, &fmt);
+
+	return 0;
+}
+
+static int vidioc_enum_framesizes(struct file *file, void *fh,
+		       struct v4l2_frmsizeenum *fsize)
+{
+	static const struct v4l2_frmsize_stepwise sizes = {
+		48, MAX_WIDTH, 4,
+		32, MAX_HEIGHT, 1
+	};
+	int i;
+
+	if (fsize->index)
+		return -EINVAL;
+	for (i = 0; i < ARRAY_SIZE(vid_dev_formats); i++)
+		if (vid_dev_formats[i].fourcc == fsize->pixel_format)
+			break;
+	if (i == ARRAY_SIZE(vid_dev_formats))
+		return -EINVAL;
+	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
+	fsize->stepwise = sizes;
+	return 0;

drivers/media/platform/dwc/video_device.c new file +323 -0

+	strcpy(input->name, "Camera");
+	return 0;
+}
+
+static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+	if (i != 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int
+vid_dev_streamon(struct file *file, void *priv, enum v4l2_buf_type type)
+{
+	struct video_device_dev *vid_dev = video_drvdata(file);
+	struct media_entity *entity = &vid_dev->ve.vdev.entity;
+	int ret;
+
+	ret = media_entity_pipeline_start(entity, &vid_dev->ve.pipe->mp);
+	if (ret < 0)
+		return ret;
+
+	vb2_ioctl_streamon(file, priv, type);
+	if (!ret)
+		return ret;
+
+	media_entity_pipeline_stop(entity);
+	return 0;
+}
+
+static int
+vid_dev_streamoff(struct file *file, void *priv, enum v4l2_buf_type type)
+{
+	struct video_device_dev *vid_dev = video_drvdata(file);
+	int ret;
+
+	ret = vb2_ioctl_streamoff(file, priv, type);
+	if (ret < 0)
+		return ret;
+
+	media_entity_pipeline_stop(&vid_dev->ve.vdev.entity);
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops vid_dev_ioctl_ops = {
+	.vidioc_querycap = vidioc_querycap,
+	.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
+	.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
+	.vidioc_enum_framesizes = vidioc_enum_framesizes,
+	.vidioc_enum_input = vidioc_enum_input,
+	.vidioc_g_input = vidioc_g_input,
+	.vidioc_s_input = vidioc_s_input,
+
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = vb2_ioctl_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_streamon = vid_dev_streamon,
+	.vidioc_streamoff = vid_dev_streamoff,
+};
+
+static int
+vid_dev_open(struct file *file)
+{
+	struct video_device_dev *vid_dev = video_drvdata(file);
+	struct media_entity *me = &vid_dev->ve.vdev.entity;
+	int ret;
+
+	mutex_lock(&vid_dev->lock);
+
+	ret = v4l2_fh_open(file);
+	if (ret < 0)
+		goto unlock;
+
+	if (!v4l2_fh_is_singular_file(file))
+		goto unlock;
+
+	mutex_lock(&me->graph_obj.mdev->graph_mutex);
+
+	ret = plat_ipk_pipeline_call(&vid_dev->ve, open, me, true);
+	if (ret == 0)
+		me->use_count++;
+
+	mutex_unlock(&me->graph_obj.mdev->graph_mutex);
+
+	if (!ret)
+		goto unlock;
+
+	v4l2_fh_release(file);
+unlock:
+	mutex_unlock(&vid_dev->lock);
+	return ret;
+}
+
+static int
+vid_dev_release(struct file *file)
+{
+	struct video_device_dev *vid_dev = video_drvdata(file);
+	struct media_entity *entity = &vid_dev->ve.vdev.entity;
+
+	mutex_lock(&vid_dev->lock);
+
+	if (v4l2_fh_is_singular_file(file)) {
+		plat_ipk_pipeline_call(&vid_dev->ve, close);
+		mutex_lock(&entity->graph_obj.mdev->graph_mutex);
+		entity->use_count--;
+		mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
+	}
+
+	_vb2_fop_release(file, NULL);
+
+	mutex_unlock(&vid_dev->lock);
+	return 0;
+}
+
+static const struct v4l2_file_operations vid_dev_fops = {
+	.owner = THIS_MODULE,
+	.open = vid_dev_open,
+	.release = vid_dev_release,
+	.write = vb2_fop_write,
+	.read = vb2_fop_read,
+	.poll = vb2_fop_poll,
+	.unlocked_ioctl = video_ioctl2,
+	.mmap = vb2_fop_mmap,
+};
+
+/*
+ * VideoBuffer2 operations
+ */
+
+static void fill_buffer(struct video_device_dev *dev, struct rx_buffer *buf,
+			int buf_num, unsigned long flags)
+{
+	int size = 0;
+	void *vbuf = NULL;
+
+	if (&buf->vb == NULL)
+		return;
+
+	size = vb2_plane_size(&buf->vb.vb2_buf, 0);
+	vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
+
+	if (vbuf) {
+		spin_unlock_irqrestore(&dev->slock, flags);
+
+		memcpy(vbuf, dev->dma_buf[buf_num].cpu_addr, size);
+
+		spin_lock_irqsave(&dev->slock, flags);
+
+		buf->vb.field = dev->format.fmt.pix.field;
+		buf->vb.sequence++;
+		buf->vb.vb2_buf.timestamp = ktime_get_ns();
+	}
+	vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+}
+
+static void buffer_copy_process(void *param)
+{
+	struct video_device_dev *dev = (struct video_device_dev *) param;
+	unsigned long flags;
+	struct dmaqueue *dma_q = &dev->vidq;
+	struct rx_buffer *buf = NULL;
+
+	spin_lock_irqsave(&dev->slock, flags);
+
+	if (!list_empty(&dma_q->active)) {
+		buf = list_entry(dma_q->active.next, struct rx_buffer, list);
+		list_del(&buf->list);
+		fill_buffer(dev, buf, dev->last_idx, flags);
+	}
+
+	spin_unlock_irqrestore(&dev->slock, flags);
+}
+
+static inline struct rx_buffer *to_rx_buffer(struct vb2_v4l2_buffer *vb2)
+{
+	return container_of(vb2, struct rx_buffer, vb);
+}
+
+static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
+			unsigned int *nplanes, unsigned int sizes[],
+			struct device *alloc_devs[])
+{
+	struct video_device_dev *dev = vb2_get_drv_priv(vq);
+	unsigned long size = 0;
+	int i;
+
+	size = dev->format.fmt.pix.sizeimage;
+	if (size == 0)
+		return -EINVAL;
+
+	*nbuffers = N_BUFFERS;
+
+	for (i = 0; i < N_BUFFERS; i++) {
+		dev->dma_buf[i].cpu_addr = dma_alloc_coherent(&dev->pdev->dev,
+						dev->format.fmt.pix.sizeimage,
+						&dev->dma_buf[i].dma_addr,
+						GFP_KERNEL);
+	}
+
+	*nplanes = 1;
+	sizes[0] = size;
+
+	return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+	struct rx_buffer *buf = NULL;
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	int size = 0;
+
+	if (vb == NULL) {
+		pr_warn("%s:vb2_buffer is null\n", FUNC_NAME);
+		return 0;
+	}
+
+	buf = to_rx_buffer(vbuf);
+
+	size = vb2_plane_size(&buf->vb.vb2_buf, 0);
+	vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
+
+	INIT_LIST_HEAD(&buf->list);
+	return 0;
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct video_device_dev *dev = NULL;
+	struct rx_buffer *buf = NULL;
+	struct dmaqueue *vidq = NULL;
+	struct dma_async_tx_descriptor *desc;
+	u32 flags;
+
+	if (vb == NULL) {
+		pr_warn("%s:vb2_buffer is null\n", FUNC_NAME);
+		return;
+	}
+
+	dev = vb2_get_drv_priv(vb->vb2_queue);
+	buf = to_rx_buffer(vbuf);
+	vidq = &dev->vidq;
+
+	flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
+	dev->xt.dir = DMA_DEV_TO_MEM;
+	dev->xt.src_sgl = false;
+	dev->xt.dst_inc = false;
+	dev->xt.dst_sgl = true;
+	dev->xt.dst_start = dev->dma_buf[dev->idx].dma_addr;
+
+	dev->last_idx = dev->idx;
+	dev->idx++;
+	if (dev->idx >= N_BUFFERS)
+		dev->idx = 0;
+
+	dev->xt.frame_size = 1;
+	dev->sgl[0].size = dev->format.fmt.pix.bytesperline;
+	dev->sgl[0].icg = 0;
+	dev->xt.numf = dev->format.fmt.pix.height;
+
+	desc = dmaengine_prep_interleaved_dma(dev->dma, &dev->xt, flags);
+	if (!desc) {
+		pr_err("Failed to prepare DMA transfer\n");
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+		return;
+	}
+
+	desc->callback = buffer_copy_process;
+	desc->callback_param = dev;
+
+	spin_lock(&dev->slock);
+	list_add_tail(&buf->list, &vidq->active);
+	spin_unlock(&dev->slock);
+
+	dmaengine_submit(desc);
+
+	if (vb2_is_streaming(&dev->vb_queue))
+		dma_async_issue_pending(dev->dma);
+}
+
+static int start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct video_device_dev *dev = vb2_get_drv_priv(vq);
+
+	dma_async_issue_pending(dev->dma);
+
+	return 0;
+}
+
+static void stop_streaming(struct vb2_queue *vq)
+{
+	struct video_device_dev *dev = vb2_get_drv_priv(vq);
+	struct dmaqueue *dma_q = &dev->vidq;
+
+	/* Stop and reset the DMA engine. */
+	dmaengine_terminate_all(dev->dma);
+
+	while (!list_empty(&dma_q->active)) {
+		struct rx_buffer *buf;
+
+		buf = list_entry(dma_q->active.next, struct rx_buffer, list);
+		if (buf) {
+			list_del(&buf->list);
+			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+		}
+	}
+	list_del_init(&dev->vidq.active);
+}
+
+static const struct vb2_ops vb2_video_qops = {
+	.queue_setup = queue_setup,
+	.buf_prepare = buffer_prepare,
+	.buf_queue = buffer_queue,

drivers/media/platform/dwc/video_device.c new file +14 -0

+
+static int vid_dev_subdev_registered(struct v4l2_subdev *sd)
+{
+	struct video_device_dev *vid_dev = v4l2_get_subdevdata(sd);
+	struct vb2_queue *q = &vid_dev->vb_queue;
+	struct video_device *vfd = &vid_dev->ve.vdev;
+	int ret;
+
+	memset(vfd, 0, sizeof(*vfd));
+
+	strlcpy(vfd->name, VIDEO_DEVICE_NAME, sizeof(vfd->name));
+
+	vfd->fops = &vid_dev_fops;
+	vfd->ioctl_ops = &vid_dev_ioctl_ops;

drivers/media/platform/dwc/video_device.c new file +174 -0

+	q->buf_struct_size = sizeof(struct rx_buffer);
+	q->drv_priv = vid_dev;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->lock = &vid_dev->lock;
+
+	ret = vb2_queue_init(q);
+	if (ret < 0)
+		return ret;
+
+	vid_dev->vd_pad.flags = MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&vfd->entity, 1, &vid_dev->vd_pad);
+	if (ret < 0)
+		return ret;
+
+	video_set_drvdata(vfd, vid_dev);
+	vid_dev->ve.pipe = v4l2_get_subdev_hostdata(sd);
+
+	ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
+	if (ret < 0) {
+		media_entity_cleanup(&vfd->entity);
+		vid_dev->ve.pipe = NULL;
+		return ret;
+	}
+
+	v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
+		  vfd->name, video_device_node_name(vfd));
+	return 0;
+}
+
+static void vid_dev_subdev_unregistered(struct v4l2_subdev *sd)
+{
+	struct video_device_dev *vid_dev = v4l2_get_subdevdata(sd);
+
+	if (vid_dev == NULL)
+		return;
+
+	mutex_lock(&vid_dev->lock);
+
+	if (video_is_registered(&vid_dev->ve.vdev)) {
+		video_unregister_device(&vid_dev->ve.vdev);
+		media_entity_cleanup(&vid_dev->ve.vdev.entity);
+		vid_dev->ve.pipe = NULL;
+	}
+
+	mutex_unlock(&vid_dev->lock);
+}
+
+static const struct v4l2_subdev_internal_ops vid_dev_subdev_internal_ops = {
+	.registered = vid_dev_subdev_registered,
+	.unregistered = vid_dev_subdev_unregistered,
+};
+
+static const struct v4l2_subdev_core_ops vid_dev_subdev_core_ops = {
+	.s_power = vid_dev_subdev_s_power,
+};
+
+static struct v4l2_subdev_ops vid_dev_subdev_ops = {
+	.core = &vid_dev_subdev_core_ops,
+};
+
+static int vid_dev_create_capture_subdev(struct video_device_dev *vid_dev)
+{
+	struct v4l2_subdev *sd = &vid_dev->subdev;
+	int ret;
+
+	v4l2_subdev_init(sd, &vid_dev_subdev_ops);
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	snprintf(sd->name, sizeof(sd->name), "Capture device");
+
+	vid_dev->subdev_pads[VIDEO_DEV_SD_PAD_SINK_CSI].flags =
+		MEDIA_PAD_FL_SOURCE;
+	vid_dev->subdev_pads[VIDEO_DEV_SD_PAD_SOURCE_DMA].flags =
+		MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&sd->entity, VIDEO_DEV_SD_PADS_NUM,
+				   vid_dev->subdev_pads);
+	if (ret)
+		return ret;
+
+	sd->internal_ops = &vid_dev_subdev_internal_ops;
+	sd->owner = THIS_MODULE;
+	v4l2_set_subdevdata(sd, vid_dev);
+
+	return 0;
+}
+
+static void vid_dev_unregister_subdev(struct video_device_dev *vid_dev)
+{
+	struct v4l2_subdev *sd = &vid_dev->subdev;
+
+	v4l2_device_unregister_subdev(sd);
+	media_entity_cleanup(&sd->entity);
+	v4l2_set_subdevdata(sd, NULL);
+}
+
+static const struct of_device_id vid_dev_of_match[];
+
+static int vid_dev_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *of_id;
+	int ret = 0;
+	struct video_device_dev *vid_dev;
+
+	dev_dbg(dev, "Installing IPK Video Device module\n");
+
+	if (!dev->of_node)
+		return -ENODEV;
+
+	vid_dev = devm_kzalloc(dev, sizeof(*vid_dev), GFP_KERNEL);
+	if (!vid_dev)
+		return -ENOMEM;
+
+	of_id = of_match_node(vid_dev_of_match, dev->of_node);
+	if (WARN_ON(of_id == NULL))
+		return -EINVAL;
+
+	vid_dev->pdev = pdev;
+
+	spin_lock_init(&vid_dev->slock);
+	mutex_init(&vid_dev->lock);
+
+	dev_dbg(&pdev->dev, "Requesting DMA\n");
+	vid_dev->dma = dma_request_slave_channel(&pdev->dev, "vdma0");
+	if (vid_dev->dma == NULL) {
+		dev_err(&pdev->dev, "no VDMA channel found\n");
+		ret = -ENODEV;
+		goto end;
+	}
+
+	ret = vid_dev_create_capture_subdev(vid_dev);
+	if (ret)
+		goto end;
+
+	platform_set_drvdata(pdev, vid_dev);
+
+	dev_info(dev, "Video Device registered successfully\n");
+	return 0;
+end:
+	dev_err(dev, "Video Device not registered!!\n");
+	return ret;
+}
+
+static int vid_dev_remove(struct platform_device *pdev)
+{
+	struct video_device_dev *dev = platform_get_drvdata(pdev);
+
+	vid_dev_unregister_subdev(dev);
+	dev_info(&pdev->dev, "Driver removed\n");
+
+	return 0;
+}
+
+static const struct of_device_id vid_dev_of_match[] = {
+	{.compatible = "snps,video-device"},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, vid_dev_of_match);
+
+static struct platform_driver __refdata vid_dev_pdrv = {
+	.remove = vid_dev_remove,
+	.probe = vid_dev_probe,
+	.driver = {
+		   .name = VIDEO_DEVICE_NAME,
+		   .owner = THIS_MODULE,
+		   .of_match_table = vid_dev_of_match,
+		   },
+};
+
+module_platform_driver(vid_dev_pdrv);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ramiro Oliveira <roliveir-HKixBCOQz3hWk0Htik3J/[email protected]>");
+MODULE_DESCRIPTION("Driver for configuring DMA and Video Device");

drivers/media/platform/dwc/video_device.h new file +75 -0

new file mode 100644
index 0000000..2d8a1a0
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2016 Synopsys, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef VIDEO_DEVICE_H_
+#define VIDEO_DEVICE_H_
+
+#include <linux/delay.h>
+#include <linux/dma/xilinx_dma.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/wait.h>
+#include <media/media-entity.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-vmalloc.h>
+
+
+
+#include "plat_ipk_video.h"
+
+#define N_BUFFERS 3
+
+#define VIDEO_DEVICE_NAME	"video-device"
+
+#define FUNC_NAME __func__
+
+struct rx_buffer {
+	/** @short Buffer for video frames */
+	struct vb2_v4l2_buffer vb;
+	struct list_head list;
+
+	dma_addr_t dma_addr;
+	void *cpu_addr;
+};
+
+struct dmaqueue {
+	struct list_head active;
+	wait_queue_head_t wq;
+};
+
+/**
+ * @short Structure to embed device driver information
+ */
+struct video_device_dev {
+	struct platform_device *pdev;
+	struct v4l2_device *v4l2_dev;
+	struct v4l2_subdev subdev;
+	struct media_pad vd_pad;
+	struct media_pad subdev_pads[VIDEO_DEV_SD_PADS_NUM];
+	struct mutex lock;
+	spinlock_t slock;
+	struct plat_ipk_video_entity ve;
+	struct v4l2_format format;
+	struct v4l2_pix_format pix_format;
+	const struct plat_ipk_fmt *fmt;
+	unsigned long *alloc_ctx;
+
+	/* Buffer and DMA */
+	struct vb2_queue vb_queue;

Hi Ramiro,

See my review comments below:

Quoted 3 lines · Ramiro Oliveira

Add support for the DesignWare CSI-2 Host IP Prototyping Kit

Signed-off-by Ramiro Oliveira <[email protected]>

Quoted 20 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +20 -0

+static int
+dw_mipi_csi_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
+            struct v4l2_subdev_format *fmt)
+{
+    struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+    struct mipi_fmt const *dev_fmt;
+    struct v4l2_mbus_framefmt *mf;
+    unsigned int i = 0;
+    const struct v4l2_bt_timings *bt_r = &v4l2_dv_timings_presets[0].bt;
+
+    mf = __dw_mipi_csi_get_format(dev, cfg, fmt->which);
+
+    dev_fmt = dw_mipi_csi_try_format(&fmt->format);
+    if (dev_fmt) {
+        *mf = fmt->format;
+        if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+            dev->fmt = dev_fmt;
+        dw_mipi_csi_set_ipi_fmt(dev);
+    }
+    while (v4l2_dv_timings_presets[i].bt.width) {

drivers/media/platform/dwc/dw_mipi_csi.c line 318

Quoted 10 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +10 -0

+        const struct v4l2_bt_timings *bt =
+            &v4l2_dv_timings_presets[i].bt;
+        if (mf->width == bt->width && mf->height == bt->width) {
+            __dw_mipi_csi_fill_timings(dev, bt);
+            return 0;
+        }
+        i++;
+    }
+
+    __dw_mipi_csi_fill_timings(dev, bt_r);

This code is weird. The video source can be either from a sensor or from an HDMI input, right?

But if it is from a sensor, then using v4l2_dv_timings_presets since that's for an HDMI input. Sensors will typically not follow these preset timings.

For HDMI input I expect that this driver supports the s_dv_timings op and will just use the timings set there and override the width/height in v4l2_subdev_format.

For sensors I am actually not quite certain how this is done. I've CC-ed Sakari since he'll know. But let us know first whether it is indeed the intention that this should also work with a sensor.

Quoted 37 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +37 -0

+    return 0;
+
+}
+
+static int
+dw_mipi_csi_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
+            struct v4l2_subdev_format *fmt)
+{
+    struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+    struct v4l2_mbus_framefmt *mf;
+
+    mf = __dw_mipi_csi_get_format(dev, cfg, fmt->which);
+    if (!mf)
+        return -EINVAL;
+
+    mutex_lock(&dev->lock);
+    fmt->format = *mf;
+    mutex_unlock(&dev->lock);
+    return 0;
+}
+
+static int
+dw_mipi_csi_s_power(struct v4l2_subdev *sd, int on)
+{
+    struct mipi_csi_dev *dev = sd_to_mipi_csi_dev(sd);
+
+    if (on) {
+        dw_mipi_csi_hw_stdby(dev);
+        dw_mipi_csi_start(dev);
+    } else {
+        dw_mipi_csi_mask_irq_power_off(dev);
+    }
+
+    return 0;
+}
+
+static int

drivers/media/platform/dwc/dw_mipi_csi.c line 365

Quoted 10 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +10 -0

+dw_mipi_csi_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+    struct v4l2_mbus_framefmt *format =
+        v4l2_subdev_get_try_format(sd, fh->pad, 0);
+
+    format->colorspace = V4L2_COLORSPACE_SRGB;
+    format->code = dw_mipi_csi_formats[0].code;
+    format->width = MIN_WIDTH;
+    format->height = MIN_HEIGHT;
+    format->field = V4L2_FIELD_NONE;

Don't do this. Instead implement the init_cfg pad op and initialize this there.

You can then drop this function.

Quoted 74 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +74 -0

+
+    return 0;
+}
+
+static const struct v4l2_subdev_internal_ops dw_mipi_csi_sd_internal_ops = {
+    .open = dw_mipi_csi_open,
+};
+
+static struct v4l2_subdev_core_ops dw_mipi_csi_core_ops = {
+    .s_power = dw_mipi_csi_s_power,
+};
+
+static struct v4l2_subdev_pad_ops dw_mipi_csi_pad_ops = {
+    .enum_mbus_code = dw_mipi_csi_enum_mbus_code,
+    .get_fmt = dw_mipi_csi_get_fmt,
+    .set_fmt = dw_mipi_csi_set_fmt,
+};
+
+static struct v4l2_subdev_ops dw_mipi_csi_subdev_ops = {
+    .core = &dw_mipi_csi_core_ops,
+    .pad = &dw_mipi_csi_pad_ops,
+};
+
+static irqreturn_t
+dw_mipi_csi_irq1(int irq, void *dev_id)
+{
+    struct mipi_csi_dev *csi_dev = dev_id;
+    u32 global_int_status, i_sts;
+    unsigned long flags;
+    struct device *dev = &csi_dev->pdev->dev;
+
+    global_int_status = dw_mipi_csi_read(csi_dev, R_CSI2_INTERRUPT);
+    spin_lock_irqsave(&csi_dev->slock, flags);
+
+    if (global_int_status & CSI2_INT_PHY_FATAL) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PHY_FATAL);
+        dev_dbg_ratelimited(dev, "CSI INT PHY FATAL: %08X\n", i_sts);
+    }
+
+    if (global_int_status & CSI2_INT_PKT_FATAL) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PKT_FATAL);
+        dev_dbg_ratelimited(dev, "CSI INT PKT FATAL: %08X\n", i_sts);
+    }
+
+    if (global_int_status & CSI2_INT_FRAME_FATAL) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_FRAME_FATAL);
+        dev_dbg_ratelimited(dev, "CSI INT FRAME FATAL: %08X\n", i_sts);
+    }
+
+    if (global_int_status & CSI2_INT_PHY) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PHY);
+        dev_dbg_ratelimited(dev, "CSI INT PHY: %08X\n", i_sts);
+    }
+
+    if (global_int_status & CSI2_INT_PKT) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_PKT);
+        dev_dbg_ratelimited(dev, "CSI INT PKT: %08X\n", i_sts);
+    }
+
+    if (global_int_status & CSI2_INT_LINE) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_LINE);
+        dev_dbg_ratelimited(dev, "CSI INT LINE: %08X\n", i_sts);
+    }
+
+    if (global_int_status & CSI2_INT_IPI) {
+        i_sts = dw_mipi_csi_read(csi_dev, R_CSI2_INT_IPI);
+        dev_dbg_ratelimited(dev, "CSI INT IPI: %08X\n", i_sts);
+    }
+    spin_unlock_irqrestore(&csi_dev->slock, flags);
+    return IRQ_HANDLED;
+}
+
+static int
+dw_mipi_csi_parse_dt(struct platform_device *pdev, struct mipi_csi_dev *dev)

drivers/media/platform/dwc/dw_mipi_csi.c line 445

Quoted 6 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +6 -0

+{
+    struct device_node *node = pdev->dev.of_node;
+    int reg;
+    int ret = 0;
+
+    /* Device tree information */

I would expect to see a call to v4l2_of_parse_endpoint here.

Quoted 58 lines

drivers/media/platform/dwc/dw_mipi_csi.c new file +58 -0

+    ret = of_property_read_u32(node, "data-lanes", &dev->hw.num_lanes);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read data-lanes\n");
+        return ret;
+    }
+
+    ret = of_property_read_u32(node, "output-type", &dev->hw.output_type);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read output-type\n");
+        return ret;
+    }
+
+    ret = of_property_read_u32(node, "ipi-mode", &dev->hw.ipi_mode);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read ipi-mode\n");
+        return ret;
+    }
+
+    ret =
+        of_property_read_u32(node, "ipi-auto-flush",
+                 &dev->hw.ipi_auto_flush);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read ipi-auto-flush\n");
+        return ret;
+    }
+
+    ret =
+        of_property_read_u32(node, "ipi-color-mode",
+                 &dev->hw.ipi_color_mode);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read ipi-color-mode\n");
+        return ret;
+    }
+
+    ret =
+        of_property_read_u32(node, "virtual-channel", &dev->hw.virtual_ch);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read virtual-channel\n");
+        return ret;
+    }
+
+    node = of_get_child_by_name(node, "port");
+    if (!node)
+        return -EINVAL;
+
+    ret = of_property_read_u32(node, "reg", &reg);
+    if (ret) {
+        dev_err(&pdev->dev, "Couldn't read reg value\n");
+        return ret;
+    }
+    dev->index = reg - 1;
+
+    if (dev->index >= CSI_MAX_ENTITIES)
+        return -ENXIO;
+
+    return 0;
+}
+

drivers/media/platform/dwc/plat_ipk.c line 2

Quoted 9 lines

drivers/media/platform/dwc/plat_ipk.c new file +2 -0

new file mode 100644
index 0000000..02dcf36
@@ -0,0 +1,818 @@
+/**
+ * DWC MIPI CSI-2 Host IPK platform device driver

What does IPK stand for?