i.MX6 IPU update of the display buffer.

[satoshishimoda]

Hi community,

I have a question about i.MX6SDL IPU.

End user want to use effect (fade, wipe, push likes PowerPoint animation) to display image.

To realize it, could you reply to my questions.

[Q1]

I found the following explanation in chapter 38.1.2.1.6.2 Update Of The Display Buffer in IMX6SDLRM Rev.1.

"Automatic display of a changing image (animation) or moving image (scrolling) This

is implemented by reading frames (from a full plane buffer) with incremental offset."

Then, I thought IPU can realize the effect (fade, wipe, push, etc...)  by this function.

Is this understanding correct?

[Q2]

If my understanding is correct, could you let me know how to use this function?

I looked for how to set registers to use this function, but I coud not find it.

Best Regards,

Satoshi Shimoda

[qiang_li-mpu_se]

For this use case, it seems the customer only needs to prepare the image buffers and draw to frame buffer with PAN display interface.

The mode in "38.1.2.1.6.2 Update Of The Display Buffer", it needs prepare all buffers first, then let IPU to load them one by one automatically. It needs more memory. I think this mode is not nessary for the customer's use case.

[satoshishimoda]

Hi Qiang Li,

Thank you for your reply.

>  I think this mode is not nessary for the customer's use case.

Do you have some good idea?

Could you let me know the detail?

Best Regards,

Satoshi Shimoda

[qiang_li-mpu_se]

Hi Satoshi, the snooping signal is from the ISM (IPU Snooping Module), but for iMX6, I haven't seen such module in IPU, so I think the feature can't be supported.

By the way, I will double check it with the IC owner later since the owner is in holiday now.

[satoshishimoda]

Hi Qiang Li,

> By the way, I will double check it with the IC owner later since the owner is in holiday now.

OK, I will wait your reply.

Best Regards,

Satoshi Shimoda

[qiang_li-mpu_se · Accepted solution]

Confirmed with IC people, there is no ISM (IPU Snooping Module) on iMX6.

[satoshishimoda]

So the conclusion, user cannot use the function which is written in chapter 38.1.2.1.6.2.

Is this right?

Best Regards,

Satoshi Shimoda

[qiang_li-mpu_se]

Yes, it should be removed from the iMX6 reference manual.