Hello,
I am trying to use the AXI TPG 7.0 hooked to a AXI VDMA as shown here
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My hardware bitstream generate correctly. When updating petalinux project (2017.4) to use it, the plnx_arm-system.dts has the tpg entry like this
v_tpg@43c20000 {
compatible = "xlnx,v-tpg-7.0";
reg = <0x43c20000 0x10000>;
xlnx,s-axi-ctrl-addr-width = <0x8>;
xlnx,s-axi-ctrl-data-width = <0x20>;
But that gave me some problem during booting, complaining about non existing node 0, I cannot find the exact error since I update the system-user.dtsi to become (before there wasno entry in system-user.dtsi)
&v_tpg_0 {
status = "okay";
compatible = "xlnx,v-tpg-7.0";
reg = <0x43c20000 0x10000>;
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
xlnx,video-format = "yuv422";
xlnx,video-width = <8>;
tpg_out: endpoint {
remote-endpoint = <&axi_vdma_0>;
};
};
};
};
I try with and without the tpg_out endpoint with same error, which is
xilinx-tpg 43c20000.v_tpg: invalid format in DT
xilinx-tpg: probe of 43c20000.v_tpg failed with error -22
I understand the device tree should be something like explained here
But the problem is that I am not using VTC driver (which I really I am unsure too if needed).
What I am trying to do is to feed the VDMA with a Test Image generated by TPG. I understand the new 7.0 IP is controlled in software (in my case kernel driver) by using kernel module xilinx-tpg.ko
As far as I understand driver should load correctly so /dev/v4l-subdev is listed.
I will appreciate anyone that can share some thoughts about what am I missing here.
Best,
