How to change vsync and Hsync frequency

I am not familiar w/ DM368 VPBE, but I think those chips should be similar.

There should be kind of 'counter' which represents how much pixels per line and how many lines per frame.

Suggest you search registers by those key words in VPBE document and go back to SDK code through those registers.

Or you can search key words by video standards in SDK code.

I remember there should be VPBE test code in a CCS project, you can take it as reference,

http://support.spectrumdigital.com/boards/evmdm368/revg/files/EVMDM368_BSL.zip

Regards,

Eason

HI, 

Have a look at VPFE data sheet for DM368.  You can set the required signals using HDW/VDW  registers.  

This document should clear all your doubts on this topic.

thanks your suggestion.  now I can change freq about Hsync, Vsync.

set margin data , can change Hsync or Vsync frequency

static struct vpbe_enc_mode_info lcd_panel_timings[] = {
 {
  .name  = "320x240",
  .timings_type = VPBE_ENC_CUSTOM_TIMINGS,
  .timings = {CUSTOM_TIMING_320_240},
  .interlaced = 0,
  .xres  = 320,
  .yres  = 240,
  .aspect  = {1, 1},
  .fps  = {30, 1},
  .left_margin = 0,
  .right_margin = 360,
  .upper_margin = 0,
  .lower_margin = 450,
  .hsync_len = 40,
  .vsync_len = 10,
  .flags  = 0
 },
};