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Original question:

AM572x HDMI and LCD resolution

Linux/AM5718: LCD resolution

Arpita Jena
Expert 1055 points
Part Number: AM5718

Tool/software: Linux

Hi 

I am using Linux Processor SDK 05.00.00.15v for Sitara AM5718.

1. I want to know does the LCD1 and LCD2 supports preoressive and interlaced video format respectively ?

2. In processor SDK Linux user guide's Kernel Driver part it is mentioned that omapdrm driver does not support for Interlace as LCD output.If so , can we achieve this any way by using 'scaler' which is a supported feature in DRM Plane Features ?

3. Does the LCDs support 1024*768 and 640*480 resolutions ?

(Also mentioned that On the EVM board, we use DPI LCD panel of resolution 800 x 480.)

 Thanks and Regards 

Arpita



  • 0
    TI__Guru* 80190 points

    Hello,

    Arpita Jena said:
    3. Does the LCDs support 1024*768 and 640*480 resolutions ?

    If your display supports these resolutions the answer is yes.

    Refer this user guide:

    http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components_Graphics.html?highlight=graphics%20display

    Arpita Jena said:
    1. I want to know does the LCD1 and LCD2 supports preoressive and interlaced video format respectively ?

    In this guide you could find what is supported and what not:

    http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components_Kernel_Drivers.html#dss

    Check "Driver Features" chapter.

    You could check this thread also:

    e2e.ti.com/.../2342739

    Arpita Jena said:
    2. In processor SDK Linux user guide's Kernel Driver part it is mentioned that omapdrm driver does not support for Interlace as LCD output.If so , can we achieve this any way by using 'scaler' which is a supported feature in DRM Plane Features ?

    Let me check.

    BR
    Margarita

  • 0
    TI__Mastermind 22946 points

    Arpita Jena said:
    2. In processor SDK Linux user guide's Kernel Driver part it is mentioned that omapdrm driver does not support for Interlace as LCD output.If so , can we achieve this any way by using 'scaler' which is a supported feature in DRM Plane Features ?

    What do you mean by using "scaler" to support interlace display? What exactly do you want to use scaler for to achieve interlaced display? The problem with interlace display is DSS doesn't keep track of field id. If one of the field is dropped, the field display order will be reversed and there will be jitter seen on the display.

  • 0 in reply to Manisha Agrawal
    Expert 1055 points
    Hi Manisha ,
    Thanks for your valuable and quick response.
    Can you please help me finding the answers for the followings :
    1. Can I use the TV Output (HDMI) to get the interlaced video ?
    2. If DSS does not keep track of field id , then is it possible to get Interlaced format at HDMI output of DSS ?
    3. Is there any relation between Resolution and Interlaced or Progressive ?

    Thanks and regards
    Arpita
  • 0
    Expert 1055 points

    Part Number: AM5718

    Tool/software: Linux

    Hi Manisha ,
    Thanks for your valuable and quick response.
    Can you please help me finding the answers for the followings :
    1. Can I use the TV Output (HDMI) to get the interlaced video ?
    2. If DSS does not keep track of field id , then is it possible to get Interlaced format at HDMI output of DSS ?
    3. Is there any relation between Resolution and Interlaced or Progressive ?

    Thanks and regards
    Arpita