Hi, When double buffering by panning the framebuffer, a program might swap the buffers by using the FBIOPAN_DISPLAY ioctl. However if the update only occurs on the next vsync, the program has to wait until that vsync before it is safe to write to the new back buffer, since the hardware is still displaying it. So is it the fb driver's responsibility to sleep until the next vsync before returning from the fb_pan_display callback? If not, is there a way for userland to do it safely without resorting to triple buffering or non-standard ioctls? Thanks -- James Hogan -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
