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touch screen can not work

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Dear Sir:
    I work on OMAPl138. Enviroment is as follows:
SDK is linux-2.6.33-rc4-psp03.20.00.14.sdk,
DSP: DSP/BIOS:5.41.09, CCS:3.3.81 ,CGT:6.1.19.
EDMA version:01_11_02_05
    I use touch screen on Linux Side, which is connected to SPI1(schematic diagram
is the same as  138 EVM board). On DSP side,I don't use SPI1 or any SPI1' pin ,
When I call edma3init function on dsp side, touch screen can not work. If  I disabled
edma3init function, touch screen can work.  I check SPI1's register when I call edma3init
, register's value is not changed.
   I wish somone can help me.

   rgs,


David


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