USB OTG Eye Diagram test failed for i.MX6DP/QP on Yocto 3.14.52_1.1.0_ga

[charleshuang]

1. I use the following command to do USB OTG Eye Diagram test:

./memtool -32 0x020c9010=0x10000007

./memtool -32 0x02184140=0x2

./memtool -32 0x021841A8=0x3

./memtool -32 0x02184184=0x1C0400001

2. USB OTG Eye Diagram test failed on Yocto 3.14.52_1.1.0_ga.

But USB OTG Eye Diagram test passed on Yocto 3.14.38_beta.

Attached file includes USB OTG Eye Diagram test pictures.

Can you help solve this issue?

Thank you.

Best Regards,

Alex

Original Attachment has been moved to: USB-OTG-Eye-Diagram-test-picture.zip

[igorpadykov]

Hi charles

one can check and compare usb phy settings described in

sect.4.3.3 Operational settings AN4589 Configuring USB on i.MX 6 Series

Processors

http://cache.nxp.com/files/32bit/doc/app_note/AN4589.pdf

In general "beta" linux release can not be considered as reliable.

Best regards

igor

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