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Questions on Linux SDK for AM335x

Bob Bacon
Genius 10815 points
Other Parts Discussed in Thread: TMDXEVM3358, AM3352

Hello
I have a customer evaluating our AM335x family using our TMDXEVM3358 and have a few questions about the Linux SDK provided, which hopefully you can help me with.

1. Is it possible to alter the CPU speed to check the operation of the various speed grades available.
I know there is often a "cpu-freq-set" function but can you confirm this or something similar is included in the SDK and where it is located
There doesn't appear to be anything in the Matrix GUI demo to do this.

2. They wish to evaluate the Graphics performance of the AM3352 (i.e. without the GPU) so can you tell me what graphics demo's are available that don't use the
SGX530 GPU.

Sorry if these are a little basic but I don't have an EVM to look myself.

Many Thanks
Bob Bacon

 

  • 0
    TI__Expert 5450 points

    Bob,

    1. The CPU scaling that you are looking for is targeted for an April 16th release in SDK version 05.04.01.00

    2. While Qt can use the graphics accelerator I believe that if you don't pass the powervr flag then the GLES is not used.  Hopefully someone from the graphics team can confirm this.  The main demos we have that show off the SGX are the 3D demos.  Many of the basic Qt demos do not take advantage of the SGX, and you can find these in /usr/bin/qtopia/demos directory of the target file system if I am not mistaken.

    Chase

  • 0 in reply to Chase Maupin
    TI__Genius 10815 points

    Hello Chase

    Thanks for the information

    If you could confirm that the QT demo's don't use the GLES with the graphics team that would be great.

    Regarding cpu scaling if I took this function from another Cortex-A8 based  SDK (e.g. AM3730) would this work with the AM335x ?

    Thanks

    Bob Bacon

  • 0 in reply to Chase Maupin
    TI__Expert 6580 points

    >> While Qt can use the graphics accelerator I believe that if you don't pass the powervr flag then the GLES is not used. 

    A better way is to build Qt without opengl es2 configuration. Building it, and then running it with/without powervr display flag can take a variety of paths depending on what Qt classes are used.

  • 0 in reply to Bob Bacon
    TI__Expert 5450 points

    Bob,

    No, you cannot take cpu scaling from one device to another.  They use different power management solutions.

    Chase