topic Re: SabreSD: PCIe Endpoint in i.MX Processors

SabreSD: PCIe Endpoint

farhanmasood — Thu, 23 Oct 2014 10:04:55 GMT

I am trying to connect SabreSD as an endpoint to a PC. I followed i.MX6Q PCIe EP/RC Validation System and i.MX6Q: Using an external reference for PCIe for building the kernel image. I set clkdiv2 and mpll to accept 100Mhz external clock.

when I connect it with a PC, PC says PCIe link initialization failed. With internal reference, EP works fine with a Sabrelite RC. Please help!!!

Re: SabreSD: PCIe Endpoint

igorpadykov — Sat, 25 Oct 2014 11:15:16 GMT

Hi Farhan

does it work with internal reference with PC RC ?

Best regards

igor

Re: SabreSD: PCIe Endpoint

farhanmasood — Mon, 27 Oct 2014 06:29:43 GMT

no it doesnt :smileysad:

Re: SabreSD: PCIe Endpoint

igorpadykov — Mon, 27 Oct 2014 07:43:05 GMT

Hi Farhan

suggest to check if TX lines on PC side have in series 0.1uF capacitors as C6,C5

in SPF-27392 p.16

SABRE Platform for Smart Devices Reference Design Based on the i.MX 6 Series

~igor

Re: SabreSD: PCIe Endpoint

farhanmasood — Mon, 27 Oct 2014 10:04:42 GMT

Yes there are caps on both Tx lines. None on Rx lines.

Re: SabreSD: PCIe Endpoint

igorpadykov — Mon, 27 Oct 2014 14:09:59 GMT

I think you can try several PCs, seems noise (more on PC

than on i.MX6 RC board) greatly affects connection.

You can check posts from key two with SABRE Lite board,

checking link with ./memtool -32 01ffc72c and trying different cables

i.MX6Q PCIe EP/RC Validation System

~igor

Re: SabreSD: PCIe Endpoint

b47504 — Wed, 19 Nov 2014 02:43:57 GMT

I would suggest you should make sure the external clock can work correctly firstly, then tried it with PC.

This an automatic process. We are marking this post as s...

CommunityBot — Thu, 03 Sep 2020 15:03:42 GMT

This an automatic process.

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