I have some confuse on the concept of iMX6 graphic window and full plane alpha blending, as you can set Graphic Window as full plane in the register " IPUx_DP_COM_CONF_SYNC" ( set GWSEL=0;)
But the in the register below, it says,
"GWAV - Graphic Window Alpha Value
Defines the alpha value of graphic window used for alpha blending between graphic window and full
plane. The Value the number that writing to GWAV register. "
How about if graphic window == full plane? how to blend??