My current board setup appears to use an alpha value of about 0.5 for video that goes into /dev/fb1 or /dev/fb3. Is there any way to change this without using an ioctl? I found this "Alpha Test on iMX6Q" post which looks like what I want to do - is this the only way to do it? I'm using Yocto Dora if that's important or helps... Thanks!