CRC for LVDS display of imx8qxp processor

[Ashil]

We were interested in incorporating CRC or checksum functionality to perform integrity checks on specific zones or portions of soft tell-tale indicators displayed on our system. These checks are essential for ensuring the accuracy and reliability of critical information presented to our users.Can you command about this possibility for imx8qxp. Are there any recommended software libraries or functions for calculating CRC or checksums that are well-suited for the i.MX 8 platform

[Sanket_Parekh]

Hi @Ashil,

I hope you are doing well.

Display Content Integrity Checker using CRC is supported in i.MX 8QuadXPlus Processors.

Please refer to 8.2 Display Content Integrity Checker (DCIC) and 8.2.7 DCIC CRC Calculation Functions in i.MX Linux Reference Manual for more information and functions for calculating CRC.

One can look at /test/mxc_dcic_test for the sample program.

Thanks & Regards,
Sanket Parekh

[Ashil]

Hi,

Thanks for letting me know the example.

is this test/mxc_dcic_test/mxc_dcic_test.c source code checking the a frame from frame buffer.

In that case I had a question are we checking CRC of the frame which is comming as output of Display controller. or are we checking CRC of the frame which is input to the display controller

[Sanket_Parekh]

Hi @Ashil,

I hope you are doing well.

DCIC checks the CRC of the frame which is coming as the output of the Display controller.

DCIC driver is used for i.MX6Q series. i.MX8QXP uses dpu-crc module.

Please refer to the community post below for more information.

Signature check for display for the IMX8QXP

Thanks & Regards,

Sanket Parekh