1、Problem: In the actual application scenario, there is a difference between the FPGA (K7) and ARM (am5708) display, as shown in the following figure:
2、Reproduce the problem
To adjust the display ratio of the display, you can use a monitor that can adjust the display ratio, use the background of the black border output by the display and the background of the software output to compare, respectively, let the 5708, FPGA and the black background of the display be compared, the measured situation is as follows:
(1) AM5708 QT program output black background comparison with monitor:
（2）FPGA output versus screen output
3. Summary: From the test situation, the black background of the FPGA output and the display output can not be seen different, but there will be obvious differences in the 5708 output, and it is necessary to help locate the cause of the output difference to see if there are any optimization suggestions.
