Ds90ub949-q1 is used with DS90UB948-Q1,hdmi output to ds90ub949, 948 output to screen， the screen is not displayed but the backlight of the screen is bright, and i2c can communicate with Ds90ub949-q1 and S90UB948-Q1.
T he pattern test is performed, the screen is also not displayed.
Perform the configuration according to 4.4 Cases in the SNLA132G document. Use the Without FPD-link III scheme and configure 948 to enter Pattern test. The screen displays no information.
code show as below：
{
//1. Set Pixel Clock and Active Frame Size 1920
ds90ub948_single_write(ds90ub948, 0x66, 0x07);
ds90ub948_single_write(ds90ub948, 0x67, 0x80);
ds90ub948_single_write(ds90ub948, 0x66, 0x08);
ds90ub948_single_write(ds90ub948, 0x67, 0x87);
ds90ub948_single_write(ds90ub948, 0x66, 0x09);
ds90ub948_single_write(ds90ub948, 0x67, 0x43);
//2. Set Total Frame Size 2200
ds90ub948_single_write(ds90ub948, 0x66, 0x04);
ds90ub948_single_write(ds90ub948, 0x67, 0x98);
ds90ub948_single_write(ds90ub948, 0x66, 0x05);
ds90ub948_single_write(ds90ub948, 0x67, 0x58);
ds90ub948_single_write(ds90ub948, 0x66, 0x06);
ds90ub948_single_write(ds90ub948, 0x67, 0x46);
//3. Set Back Porch
ds90ub948_single_write(ds90ub948, 0x66, 0x0C);
ds90ub948_single_write(ds90ub948, 0x67, 0x94);
ds90ub948_single_write(ds90ub948, 0x66, 0x0D);
ds90ub948_single_write(ds90ub948, 0x67, 0x24);
//4. Set Sync Width
ds90ub949_single_write(ds90ub948, 0x66, 0x0A);
ds90ub949_single_write(ds90ub948, 0x67, 0x2C);
ds90ub948_single_write(ds90ub948, 0x66, 0x0B);
ds90ub948_single_write(ds90ub948, 0x67, 0x05);
//5.Set Sync Polarities
ds90ub948_single_write(ds90ub948, 0x66, 0x0E);
ds90ub948_single_write(ds90ub948, 0x67, 0x00);
//6.Enable Pattern Generation
ds90ub948_single_write(ds90ub948, 0x65, 0x0C);
ds90ub948_single_write(ds90ub948, 0x64, 0x05);
}
How should I judge the problem?
How to make patgen work only on deserializers before using patgen via FPD-Link?
Please give me a reply. Thank you very much
