Input video signal to backend is switched to different resolution some time.
Then , the counter CHx_LCF[10:0] about total number of lines in component processor is operated incorrectly.
Please let me know your advice below
Video signal (1280*800, Total line is 831 lines) is processed correctly.
Then we switch from this video signal to another video signal ( 828 total lines. Note 1) using electrical switcher (SWer. Note2).
But, Value of CHx_LCF is not changed and 831 total lines(Note 3) are read.
And, 828 total lines are read at reverse situation.
Note1: not VESE 1280*800 signal which PC generates when EDID is not received
Note2: Input signal is switched instantaneously so video signal always input to backend.
Note3: Value of CH2_LCF should be 827=0x33b which true value minus 1 but 830=0x33e be always read.
Above issue is critical issue because the system does not recognize resolution correctly.
Please let me know your advice.
1: How can value of CHx_LCF[10:0] be updated correctly when input signal is switched ?
Please let me know your advice assumed problem in our system.