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AM3517: DSS 90 and 270-Degree Rotation DMA Optimization

Kanae
Guru 10095 points
Other Parts Discussed in Thread: AM3517
Hi.
My customer need to rotate 270 degrees to their image.
However, Errata: Advisory 1.1.25 describes that it does not function properly. 
Will it plan to fix the function of DSS 90 and 270-Degree Rotation DMA Optimization 
or plan to provide the workaround in the near future?

Any information would be appreciated.







Regards,
Kanae
  • 0
    TI__Expert 8180 points

    Can you point me to this errata?

    Thanks,

    Vaibhav

  • 0 in reply to Vaibhav Hiremath
    Guru 10095 points

    Hi, Vaibhav.
    I appreciate that you care about my post.
    However my customer could find the workaround by themselves.
    I am relieved for now anyway.
    Thank you for your time.

    Regards,
    Kanae 

  • 0 in reply to Kanae
    Guru 10095 points


    Regarding Advisory 1.1.25 of AM3517 Errata, I would like to make sure it.
    In Technical Reference Manual : Page-1340, it describes;
      ...If the bit is clear, the DMA engine fetches one pixel for each 32-bit OCP
     　request (RGB16 and YUV422) while doing 90- and 270-degree rotation.

    Is this meant if it is not 32-bit OCP request (RGB16 and YUV422) such as YUV420,
    there is possibility to be 90- and 270- degree rotation?
    Or is it HW limitation for 90- and 270- degree rotation?
    If there is HW limitation, I need the details of HW structures.
    Because I must explain this to my customer.

    Regards,
    Kanae