i.MX6D Android screen is noisy.

[satoshishimoda]

Hi communty

On a i.MX6D custom board, android (jb4.2.2_1.0.0) screen is very noisy after resume from sleep as attached file "After resume.png".

This noise was worse when touch the screen as "Touch after resume.png".

But when retried sleep -> resume again, the noise was resolved as "Retry resume.png".

Do you know how to resolve this issue?

Best Regards,

Satoshi Shimoda

[CommunityBot · Accepted solution]

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We are marking this post as solved, due to the either low activity or any reply marked as correct.

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NXP Community!

[RodBorras]

Hi,

Please see the ideal register settings, and patch, here: LVDS panel display corruption

Regards,

Rod.

[satoshishimoda]

Hi RodBorras,

Thank you for your reply.

Then, we understood the thread and patch is for optimizing a LVDS clock, isn't it?

Actually, our partner who made the custom board have confirmed the LVDS clock is no problem.

And HDMI display is no problem when the noise is NOT occurred on LVDS display, but nothing is displayed on HDMI when the noise is occurred on LVDS display if using LVDS + HDMI dual display.

Do you think this issue will be resolved the patch in  LVDS panel display corruption? or is this different issue?

Best Regards,

Satoshi Shimoda

[RodBorras]

Hi,

I have not encountered the interaction you describe between the HDMI and the LVDS, and have no suggestions at this time. Sorry.

That said, I encourage you to try the patch, regardless of your root cause.

If it does not work for you, please post your results here, and somebody might have follow-up ideas.

Thanks,

Rod.

[satoshishimoda]

Hi RobBorras,

Can you guess what is root cause by the following relationship LVDS and HDMI display?

> And HDMI display is no problem when the noise is NOT occurred on LVDS display, but nothing is displayed on HDMI when the noise is occurred on LVDS display if using LVDS + HDMI dual display.

For your information, this issue was not resolved even if slide the home menu.

And if tap the noisy screen, the noise was increased.

In addition, the following error was output to logcat when this issue was occurred.

E/GKI_LINUX( 2955): ##### ERROR : timer_thread: tick delayed > 5 slots (-1177206671,-50000000) -- cpu overload ? #####

Best Regards,

Satoshi Shimoda

[jamesbone]

Hello Satoshi San,

Do you know How IPU is configured in this regards? (di0/di1/ipu0/ipu1)

[satoshishimoda]

Hi  jamesbone,

I got the information what IPU/DI is used from our partner.

LVDS => IPU0, DI0 (LVDS0)

HDMI => IPU1, DI0

Best Regards,

Satoshi Shimoda

[YixingKong]

Satoshi-san

Had your issue got resolved? If yes, we are going to close the discussion in 3 days. If you still need help, please feel free to reply with an update to this discussion.

Thanks,

Yixing

[satoshishimoda]

Hi Yixing Kong,

> Had your issue got resolved?

Unfortunately, no.

So I'm waiting your reply.

Best Regards,

Satoshi Shimoda

[YixingKong]

Satoshi

I will find an AE internally to help your questions.

Thanks,

Yixing

[karina_valencia]

Re: i.MX6D Android screen is noisy.

Qiang_FSL Jun 29, 2014 10:56 PM (in response to jamesbone)

I think it is not the IPU issue, it looks more like GPU hasn't draw display correctly. Maybe the customer can update the GPU and retry it:

https://community.freescale.com/docs/DOC-99454

[satoshishimoda]

Thank you for your advice.

Our partner is trying the patch in Android jb4.2.2 GPU upgade with the latest 4.6.9p13 (used in jb4.3).

Please wait a little about the result.

Best Regards,

Satoshi Shimoda

[jamesbone]

Hello Satoshi San,

I already escalated internally your issue, as soon as we get a response we are going back to you.

[YixingKong]

James

Coudl you keep following the issue please, or need help?

Thanks,

Yixing

[RodBorras]

Sorry, I have not run into this before. Let's hope that someone else on the community has some ideas...

[satoshishimoda]

Hi RodBorras,

Unfortunately, the patch in LVDS panel display corruption did not resolve this noise issue.

Then, could you let me know what should we do in next step?

Best Regards,

Satoshi Shimoda