[media] v4l: xilinx: Add Test Pattern Generator driver

The TPG generates multiple static or dynamic test patterns. The driver
currently hardcodes the pattern to the moving box pattern.

Signed-off-by: Christian Kohn <christian.kohn@xilinx.com>
Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/media/xilinx/xlnx,v-tpg.txt b/Documentation/devicetree/bindings/media/xilinx/xlnx,v-tpg.txt
new file mode 100644
index 000000000000..9dd86b3db937
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/xilinx/xlnx,v-tpg.txt
@@ -0,0 +1,71 @@
+Xilinx Video Test Pattern Generator (TPG)
+-----------------------------------------
+
+Required properties:
+
+- compatible: Must contain at least one of
+
+    "xlnx,v-tpg-5.0" (TPG version 5.0)
+    "xlnx,v-tpg-6.0" (TPG version 6.0)
+
+  TPG versions backward-compatible with previous versions should list all
+  compatible versions in the newer to older order.
+
+- reg: Physical base address and length of the registers set for the device.
+
+- clocks: Reference to the video core clock.
+
+- xlnx,video-format, xlnx,video-width: Video format and width, as defined in
+  video.txt.
+
+- port: Video port, using the DT bindings defined in ../video-interfaces.txt.
+  The TPG has a single output port numbered 0.
+
+Optional properties:
+
+- xlnx,vtc: A phandle referencing the Video Timing Controller that generates
+  video timings for the TPG test patterns.
+
+- timing-gpios: Specifier for a GPIO that controls the timing mux at the TPG
+  input. The GPIO active level corresponds to the selection of VTC-generated
+  video timings.
+
+The xlnx,vtc and timing-gpios properties are mandatory when the TPG is
+synthesized with two ports and forbidden when synthesized with one port.
+
+Example:
+
+        tpg_0: tpg@40050000 {
+                compatible = "xlnx,v-tpg-6.0", "xlnx,v-tpg-5.0";
+                reg = <0x40050000 0x10000>;
+                clocks = <&clkc 15>;
+
+                xlnx,vtc = <&vtc_3>;
+                timing-gpios = <&ps7_gpio_0 55 GPIO_ACTIVE_LOW>;
+
+                ports {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        port@0 {
+                                reg = <0>;
+
+                                xlnx,video-format = <XVIP_VF_YUV_422>;
+                                xlnx,video-width = <8>;
+
+                                tpg_in: endpoint {
+                                        remote-endpoint = <&adv7611_out>;
+                                };
+                        };
+                        port@1 {
+                                reg = <1>;
+
+                                xlnx,video-format = <XVIP_VF_YUV_422>;
+                                xlnx,video-width = <8>;
+
+                                tpg1_out: endpoint {
+                                        remote-endpoint = <&switch_in0>;
+                                };
+                        }:
+                };
+        };