2008-02-28 11:29:54     Regarding PPI drivers for BF561 Ezkit lite

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2008-02-28 11:29:54     Regarding PPI drivers for BF561 Ezkit lite

kanal kannan (INDIA)

Message: 51809    Hi all,

 

I've added the respective drivers for PPI0, PPI1 & ADV7179 to the kernel & compiled it successfully. Through my application i'm trying to access the PPI0 drivers, ie. by giving video input to PPI0 via ADV 7183 and i'm successfully achieving the video data that i receive from PPI0 and store it in SDRAM. This works with PPI0 and if i'm adding PPI1 & enable ADV7179 to the kernel to take the video data from SDRAM and display it using an output device (TV) my entire functionality is lost. When i add PPI1 & ADV7179 to the kernel, the functionality of PPI0 which captured the input data is also getting lost. I'm not getting the video data which i used to get when, only PPI0 driver was enabled & PPI1, ADV7179 driver was disabled. I'm a little bit confused in this regard.

 

Any help in this regard would be appreciated.

 

with regards

Kanal Kannan

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2008-02-28 13:58:55     Re: Regarding PPI drivers for BF561 Ezkit lite

Mike Frysinger (UNITED STATES)

Message: 51823    you should make sure your drivers are not clobbering common registers (such as port muxing)

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2008-02-29 22:35:09     Re: Regarding PPI drivers for BF561 Ezkit lite

kanal kannan (INDIA)

Message: 51943   

 

Hi all,

 

I've now got the video data from PPI0 to PPI1 and the problem now i'm facing is that i couldn't get the data in a circular manner even though i've used DMA descriptor list. When only PPI0 is operated i'm getting the data in circular fashion but with the inclusion of PPI1 driver this functionality is lost. Also i've enabled ADV7179 driver in the kernel but i couldn't get a proper video in my display device (also PPI0 & PPI1 drivers are enabled in the kernel). Even though my application utilises both the PPIs but still i'm unable to get a proper video with inclusion of ADV7179 device.

 

any help in this regard would be appreciated.

 

regards

 

Kannan

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