VDMA test

Any ideas on how to get the vdmatest.c to run (linux-xlnx /drivers/dma/xilinx vdmatest.c)? I followed the Xilinx Wiki (http://www.wiki.xilinx.com/DMA+Drivers+-+Soft+IPs) and built the vdmatest as standalone module. Using Makefile I can build and install the module with modporobe. I see it has loaded with lsmod and can see the kernel symbol in /proc/kallsyms. What I donu2019t see is any indications that the test ran (no printK to the console, dmesg or alike). The other axidmatest seems to run OK. Any ideas on whatu2019s missing?

0 drozwood90 over 10 years ago

Hello,

For assistance with Xilinx Designs, it is best that you contact Xilinx.
Here is a link directly to the Embedded Vision Support Forum:
http://forums.xilinx.com/t5/Embedded-Processor-System-Design/bd-p/EMBEDDED

Here is one of our video reference designs, as an example of how to use the vdma driver as Avnet does it (not using vdma_test.c .
The most recent design using the AXI VDMA core is the frame buffer design for our Toshiba camera module.
http://microzed.org/sites/default/files/design/EMBV_TCM_Frame_Buffer_2014_4-Tutorial.zip

Thanks for your understanding.

--Dan
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0 Former Member over 10 years ago

Thank you,

I found the problem with vdmatest.c. The drive is calling-out:

static const struct of_device_id xilinx_vdmatest_of_ids[] = {
t{ .compatible = "xlnx,axi-vdma-test-1.00.a",},
t{}
};

But the .dts templet is calling-out, /Documentation/devicetree/bindings/dma/xilinx/vdmatest.txt :

vdmatest_0: vdmatest@0 {
tcompatible ="xlnx,axi-vdma-test";

This mismatch is keeping the vdmatest driver from loading. I ran a quick fix and now I'm seeing:

[root@alarm dma-test]# modprobe -v vdmatest insmod /lib/modules/3.17.0-xilinx-dirty/extra/vdmatest.ko
VDMA loaded started....
xilinx_vdmatest: Started 1 threads using dma1chan0 dma1chan1
dma1chan0-dma1c: terminating after 1 tests, 0 failures (status 0) xilinx_vdmatest amba_pl:vdmatest@0: VDMA test Probed!!
VDMA loaded!

Van
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