In our project, the QT menu needs to be overlaid with the video (QT is always on the top of the video and has a translucent effect)
I read the TX1 TRM documentation, ch.24 and ch.25, each display controller has three full function display windows, A, B and C, supporting scaling and blending.
And, I have read the dc.c and fb.c in “kernel/driver/video/tegra/dc”.
When tegra_dc_probe is called, it configures the DC registers include the winA/B/C configuration, but only creates one framebuffer for one of the three windows, using the tegra_fb_register function.
How do I create three framebuffer, for the three windows A/B/C, when DC is created.