Xilinx MIPI CSI-2 Receiver Subsystem ------------------------------------ The Xilinx MIPI CSI-2 Receiver Subsystem Soft IP consists of a DPHY which gets the data, an optional I2C, a CSI-2 Receiver which parses the data and converts it into AXIS data. This stream output maybe connected to a Xilinx Video Format Bridge. The maximum number of lanes supported is fixed in the design. The number of active lanes can be programmed. For e.g. the design may set maximum lanes as 4 but if the camera sensor has only 1 lane then the active lanes shall be set as 1. The pixel format set in design acts as a filter allowing only the selected data type or RAW8 data packets. The D-PHY register access can be gated in the design. The base address of the DPHY depends on whether the internal Xilinx I2C controller is enabled or not in design. The device driver registers the MIPI CSI2 Rx Subsystem as a V4L2 sub device having 2 pads. The sink pad is connected to the MIPI camera sensor and output pad is connected to the video node. Refer to xlnx,csi2rxss.txt for device tree node details. This driver helps configure the number of active lanes to be set, setting and handling interrupts and IP core enable. It logs the number of events occurring according to their type between streaming ON and OFF. It generates a v4l2 event for each short packet data received. The application can then dequeue this event and get the requisite data from the event structure. It adds new V4L2 controls which are used to get the event counter values and reset the subsystem. The Xilinx CSI-2 Rx Subsystem outputs an AXI4 Stream data which can be used for image processing. This data follows the video formats mentioned in Xilinx UG934 when the Video Format Bridge and pixels per clock design inputs are set. When the VFB is deselected then the video data width will either be 32 or 64 bits. Vishal Sagar (2): media: dt-bindings: media: xilinx: Add Xilinx MIPI CSI-2 Rx Subsystem media: v4l: xilinx: Add Xilinx MIPI CSI-2 Rx Subsystem driver .../bindings/media/xilinx/xlnx,csi2rxss.txt | 117 ++ drivers/media/platform/xilinx/Kconfig | 12 + drivers/media/platform/xilinx/Makefile | 1 + drivers/media/platform/xilinx/xilinx-csi2rxss.c | 1751 ++++++++++++++++++++ include/uapi/linux/xilinx-csi2rxss.h | 25 + include/uapi/linux/xilinx-v4l2-controls.h | 14 + 6 files changed, 1920 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/xilinx/xlnx,csi2rxss.txt create mode 100644 drivers/media/platform/xilinx/xilinx-csi2rxss.c create mode 100644 include/uapi/linux/xilinx-csi2rxss.h -- 2.7.4 This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
