Currently we are working on your 816X evaluation board. We are attempting to blend two graphics pipeline outputs together and punch it to HDMI output.
We are using your software release ti-ezsdk_c6a816x-evm_5_00_00_56, which contains a 2.6.34 kernel. The two graphics layers correspond to /dev/fb0 and /dev/fb1 respectively in linux
What we encounter currently is :
1. /dev/fb1 can not be written to, not like /dev/fb0, unless we create a process that opens /dev/fb1 and keep it unclosed.
2. When we redirect /dev/fb1 output to HDMI through sysfs at /sys/devices/platform/vpss/graphics1, the HDMI screen can only display contents on /dev/fb1. Whatever we write to /dev/fb0 can not be displayed on the screen.
Our question is how can we truly achieve the blend of /dev/fb0 and /dev/fb1 and make them both appear on HDMI?
Thank you in adavnce !