Custom 1920x720 resolution monitor timing calculation

Technical Support
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2

Dear @hkhunkim

  1. I would try to redo your changes in the mxc_hdmi.c file and leave the default values there.
  2. The changes in the mxc_edid.c file mostly seems to be OK to me. But you could try another pixclock in the fb_videomode arguments.

I would try following parameters:

 /* #48: 1920x720p@60 8:3 */
  [48] = {
     NULL, 60, 1920, 720, 37037, 56, 56, 4, 4, 16, 2,
     FB_VMODE_NONINTERLACED | FB_VMODE_ASPECT_8_3, 0
  },

  1. You missed a character in your u-boot vidargs (‘M’ after the resolution):

    setenv vidargs ‘video=mxcfb0:dev=hdmi,1920x720M@60,if=RGB24 video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off fbmem=32M’

  2. If all these changes do not work at all, you could also try to boot without any vidargs and check if the native HDMI resolution works at least and your display has a proper connection. (For this step, the first step is required).

Best regards, Diego