imx8mq eLCDIF: one base layer and one graphics overlay with alpha blending

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imx8mq eLCDIF: one base layer and one graphics overlay with alpha blending

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jignesh1
Contributor I

I read user guide of imx8mq soc and found that eLCDIF is able to do overlay with alpha blending.

Does any one have example for this usecase ?

Thanks,

Jignesh Patel

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4 Replies

135 Views
jignesh1
Contributor I

Hi All,

We are using kernel repository "linux-imx - i.MX Linux kernel "  branch "imx_4.14.78_1.0.0_ga" for our development.

One more thing I found while going through source code. I found that eLCDIF interface driver doesn't provide overlay support. Though it was mentioned in Technical Reference Manual.  I verified it using "modetest" utility.

Is there any commit for that? This feature It is very crucial for our product.

Thanks,

Jignesh

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135 Views
art
NXP TechSupport
NXP TechSupport

From the hardware point of view, the eLCDIF module of i.MX8M processor is able to perform graphics overlay with alpha blending. For details, please refer to the Section 13.2 "Enhanced LCD Interface (eLCDIF)" of the i.MX8M Reference Manual document, available on the processor's Documentation web page:

https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/i.mx-appl...

There is no ready to use software/driver to implement this feature.


Have a great day,
Artur

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jignesh1
Contributor I

Hi Artur,

Thanks for reply, When NXP is planning to release driver with overlay support in eLCDIF. ?

Is any reference driver available for this ?

Thanks,

Jignesh Patel

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135 Views
art
NXP TechSupport
NXP TechSupport

Unfortunately, I am not aware of any plans to implement the i.MX8M eLCDIF driver that supports overlay. You can create your own one based on the hardware documentation.

Best Regards,

Artur

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