Hi allThank you Robert for the guide. I tried option [1] out of tree driver. Got it compiled, and loaded when image boot up. My understand of the dma driver is that Linux DMA engine depends on the Xilinx device driver (xilinx_cdma.c) and then dma_proxy.c driver depends on the Linux DMA engine. Am I correct?
It does seems Xilinx_cdma is loaded succefully, but dmatest didn't. Here is the message I've got:
root@microzed-zynq7:~# dmesg | grep dma [ 0.202348] dma-pl330 f8003000.dmac: Loaded driver for PL330 DMAC-241330[ 0.202370] dma-pl330 f8003000.dmac: DBUFF-128x8bytes Num_Chans-8 Num_Peri-4 Num_Events-16
[ 0.202654] xilinx-vdma 7e200000.dma: failed to get axi_clk (4294967294) [ 0.202679] xilinx-vdma: probe of 7e200000.dma failed with error -2[ 2.609417] xilinx-cdma 7e200000.dma: Xilinx AXI CDMA Engine driver Probed!!
[ 2.635552] Modules linked in: axidmatest(O+) xilinx_cdma(O) [ 2.659271] PC is at xilinx_axidmatest_probe+0xd8/0x418 [axidmatest][ 2.916646] [<bf00522c>] (xilinx_axidmatest_probe [axidmatest]) from [<c03905c8>] (platform_drv_probe+0x50/0xb0) [ 3.028812] udevd[674]: worker [687] failed while handling '/devices/soc0/dmatest@0'
From these message, I'm guessing there is an issue in configuration of the common clock framework. Is the clkc.c needs to be built as an out of tree module to be used in Yocto?
Fan On 08/09/2017 12:20 PM, Robert Berger wrote:
Hi, On 2017-09-08 19:00, Fan Zhang wrote:Hi All, 1. How to include xilinx_dma.c driver in to the poky image build?In case you want to include out-of tree drivers it could work like this[1] in case you want in-tree it's just a kernel patch similar to[2].Apparently you will need to turn on kernel config features. You might try something like this[3].For Yocto/Xilinx specific questions you might want to ask on the Xilinx mailing list[4].[1] https://github.com/RobertBerger/meta-mainline/tree/pyro-training-v4.9.x/multi-v7-ml/recipes-zedboard/xilinx-dma[2] https://github.com/RobertBerger/meta-mainline/blob/pyro-training-v4.9.x/multi-v7-ml/recipes-kernel/linux/patch/4.9.x/patches/zedboard-zynq7/zynq-qspi/0001-zynq-zedboard-non-mainline-qspi-support.patch[3] https://github.com/RobertBerger/meta-mainline/tree/pyro-training-v4.9.x/multi-v7-ml/recipes-kernel/linux/config/multi-v7-ml-base/features/zynq-qspi[4] https://lists.yoctoproject.org/listinfo/meta-xilinx Regards, Robert
<<attachment: fzhang.vcf>>
-- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
