On 08/06/15 11:27, Dr. H. Nikolaus Schaller wrote:
Oops. Hm. How can we then sync the panel (SSD2858 video out) with the OMAP5 DSI sync speed? Sort of “make DISPC wait for external VSYNC impulse”?
You can't do it that way.
There's probably two options, depending on SSD2858 functionality:
1. Configure SSD2858 to use the input video timings. Thus SSD2858's output timings depend wholly on the input, and they are fully synchronized. SSD2858's timing generator is disabled.
2. Configure SSD2858 input and output video timings to be exactly the same, or very very nearly the same. Usually display chips have line buffers, and they allow slight skew on the input and output timings.
Tomi