Hi ,
My system is Android on i.MX6q + ADV7481 . Recently we found our system suddenly hang after few hours when switching display source from HDMI and iPhone project to monitor . ( Both playing videos)
I only found there are few IPU warnings like
imx-ipuv3 2800000.ipu: IPU Warning - IPU_INT_STAT_5 = 0x08000000
or
imx-ipuv3 2400000.ipu: IPU Warning - IPU_INT_STAT_10 = 0x00000001
and these are NOT the last message before system hang .
The display is totally black ( not output ?) while hang , and it seems not only not display is gone , but the whole system dead too .
Anyone has similar experience can help or suggestion ?
Thanks in advance .
Best regards,
Sidney
Solved! Go to Solution.
Hi Sidney
for IPU IPU_INT_STAT warnings one can try to tweak QoS as described on
Set max prio for all Exchanges with IPU1 on AXI bus · wolfgar/utilite@61643d3 · GitHub
sect.36.4.7 GPR (IOMUXC_GPR6) i.MX6DQ Reference Manual
i.MX 6Dual/6Quad Applications Processor Reference Manual
If whole system hangs one can try to test memory
and check board power supplies, clock stabilities using
Best regards
igor
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Hi Igor ,
Thanks for quick reply .
Now testing . Hope it works !
Best regards,
Sidney
Hi Sidney
for IPU IPU_INT_STAT warnings one can try to tweak QoS as described on
Set max prio for all Exchanges with IPU1 on AXI bus · wolfgar/utilite@61643d3 · GitHub
sect.36.4.7 GPR (IOMUXC_GPR6) i.MX6DQ Reference Manual
i.MX 6Dual/6Quad Applications Processor Reference Manual
If whole system hangs one can try to test memory
and check board power supplies, clock stabilities using
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hi igor ,
After the weekend testing , the symptom has changed .
After few minutes or hours running , system reset after a series of
imx-ipuv3 2800000.ipu: IPU Warning - IPU_INT_STAT_5 = 0x08000000
Any suggestion ?
Best regards,
Sidney
Hi Sidney
one can try dmfc=3 in kernel command line as in
https://community.nxp.com/message/953200?commentID=953200#comment-953200
Best regards
igor
Hi igor .
I see. Thanks ! Test on going .
BTW , may I ask , what does "dmfc=3" really mean ?
Best regards,
Sidney
Thank you very much