ZCU102 & AD9174 boot couldn't reach opt_post_running_stage.

Hello Chiharu ,

I tried to boot this hardware with the default configuration(MODE 4) and on my side DAC0 of the the AD9174 works fine, but DAC1 doesn't output anything!

This are the fails that I got on dmesg:

Please let me know if you encountered the same problem and also send me the dmesg of your setup!

Kind regards!

Filip.

Hello Filip,

Thanks for your reply. I also got the same dmesg as yours, but after the linux boot sequence, JESD link was successfully enabled and corresponding clock are set (confirmed with jesd_status command). I can also write/read some registers in AD9174, so I think JESD link and SPI themselves are OK.

In $HDL_DIR/projects\dac_fmc_ebz\common\config.tcl, num_links is set to 1 (Single link) as default, so I think it is the expected behavior that DAC0 works (in my case, 40MHz tone is output) and DAC1 doesn't.

Hello Filip,

Thanks for your reply. I also got the same dmesg as yours, but after the linux boot sequence, JESD link was successfully enabled and corresponding clock are set (confirmed with jesd_status command). I can also write/read some registers in AD9174, so I think JESD link and SPI themselves are OK.

In $HDL_DIR/projects\dac_fmc_ebz\common\config.tcl, num_links is set to 1 (Single link) as default, so I think it is the expected behavior that DAC0 works (in my case, 40MHz tone is output) and DAC1 doesn't.

Moved to Linux Software Drivers for further support!

Hello Filip,

Thank you for moving to appropriate place.

After my previous post, I tried to change the num_links parameter in the config.tcl from 1 to 2, but DAC1 doesn't output any signal, which I don't know why.

Do I have to change any settings to make ZCU102 + AD9174 work?

In most modes DAC1 is only supported in dual link mode.

 AD9172 mode 21 does not work with DAC1 

-Michael

Hello Michael,

Thank you for your quick reply.

In my case, I choose mode 4 as is set as default settings of HDL reference and Linux driver. And I assumed that DAC1 should be enabled if num_links is changed from 1(default) to 2.

So, the issues are as follows.

-  the setup of AD9174 seems not to be completed since JESD FSM does not reach opt_post_running_stage state which should be used to call ad9172_finalize_setup().

- DAC1 seems not activated even when the num_links parameter in the config.tcl is set to 2 and JESD link mode is set to 4 as default, while DAC0 outputs 40MHz tone.

In your devicetree do you set adi,dual-link = <1>; ?

https://github.com/analogdevicesinc/linux/pull/1781

-Michael

Thanks for the comment.

I grepped 'dual-link' in the devicetree related to ad9172 (adi-ad9172-fmc-ebz.dtsi, zynqmp-zcu102-rev10-ad9172-fmc-ebz.dts, and zynqmp-zcu102-rev10-ad9172-fmc-ebz-mode4.dts) but I couldn't find it.

Do I have to add it somewhere in the devicetree?

No - I don't think we have a dual-link example on github.

&dac0_ad9172 {

...

     adi,dual-link = <1>;

....

};

-Michael

I got it. So, the example on github is JESD mode 4 with 'Single Link', and if I want to use JESD mode 4 with Dual Link,  I should add 

     adi,dual-link = <1>;

in the devicetree as well as some other necessary modifications in the devicetree and HW models with vivado.

I just added 'adi,dual-link = <1>;' in zynqmp-zcu102-rev10-ad9172-fmc-ebz-mode4.dts and found DAC1 output 40MHz tone as well as DAC0. Thank you for the advice, Michael.

Then, I still face the other problem. JESD FSM state reaches link_running as the following boot log, but no next step occurred (going to opt_post_running_stage nor rolling back to the previous stage), which means ad9172_finalize_setup() has not been called.

[ 6.236863] jesd204: /axi/spi@ff040000/ad9172@1,jesd204:1,parent=spi1.1: JESD204[0] transition link_enable -> link_running

Is this the right behavior?