I'm developing the DisplayPort receiver product now.
And i use NVIDIA & AMD graphic cards for the compatibility test of my product.
Because my product do not support the DP Downspread, i turn off the DP Downspread of graphic cards.
According to my test result, my product works fine with NVIDIA card but do not work with AMD card. (I use a Radeon R9 270.)
I have some questions as below.
1. Do AMD Graphic cards always activate the DP Downspread?
2. Is there a control function of the DP Downspread in the AMD Driver?
3. Is it correct that AMD card generate the DP Signal by the DPCD Information?