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How to setup 1080p for OMAP display output

Annie Zhang
Intellectual 460 points
Other Parts Discussed in Thread: OMAP3530

How do I setup to do 1080p display with OMAP 35x EVM Rev. G board? Thanks.

  • 0
    TI__Intellectual 1910 points

     

        OMAP35x does not support 1080p display.  The maximum is 720p.

    Regards, Clay

  • 0 in reply to Clay Montgomery
    Intellectual 460 points

    Hi, Clay,

    Thanks. Then can I use SXGA+ dispaly (1400 x 1050) - I have a SXGA display 1280 x 1024. Connecting to OMAP, it only get 1/4 display used. Not sure how to setup OMAP so the whole display area can be utilized.

    Annie

     

  • 0 in reply to Annie Zhang
    TI__Mastermind 41665 points

    The OMAP3530 has a maximum display pixel clock of 74MHz as per the datasheet which is the primary limiting factor in displaying video, a 1400x1050 display at 60Hz (fps) would require a 1400x1050x60 = ~88MHz clock minimum with no blanking time, most LCDs at 1400x1050 require frame rates and blanking periods that would put it out of the pixel clock specification for the OMAP3, which is why the 1080p output is not possible as Clay mentioned. My suspicion is that you would not be able to properly drive such a high resolution display with the OMAP35xx, however if you want to add additional resolutions you should be able to do so by adding them to \arch\arm\plat-omap\display.c (at least you could in the older PSP releases).

  • 0 in reply to Bernie Thompson TI
    Intellectual 770 points

    If I calculate 1920x1080x30, it requires 62.208MHz, so it is possible to set 1920x1080@30fps, Is it right?

  • 0 in reply to Kaijun Tang
    TI__Mastermind 41665 points

    Kaijun Tang said:
    If I calculate 1920x1080x30, it requires 62.208MHz, so it is possible to set 1920x1080@30fps, Is it right?

    Such a configuration should be possible though typically there would also be some blanking overhead putting it a bit higher than 62.2 MHz, however it may not be useful as 1080p30 is not a common display standard. Most LCDs tend to require higher frame rates to function (~60Hz or more), so you would want to check with your display manufacturer in regards to supporting such rates. Also keep in mind that there is no out of the box support for such a format in the display drivers, so it will require some customization to add the mode, and is not something that has necessarily been verified.