2009-01-02 00:46:39 Issue in playback of video along with network driver

P SENTHIL KUMAR (INDIA)

Message: 67279

Dear All,

We are using 2008R1.5 and BF561 based custom board.

We are haiving network chip in our custom board and we have enabled the network driver for our network playbacks.

In paralle we have enabled our display dirver for video.

During downloading from the network our video display is jumping vertically up and down, but after finishing network downloading there is no jump in the display.

Also, we are getting some greenlines in the video display, after enabling the dhcp in our application.

Let me know how fix this issue.

Regards, Senthil

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2009-01-02 07:42:49 Re: Issue in playback of video along with network driver

Robin Getz (UNITED STATES)

Message: 67302

Senthil:

Which ethernet chip are you using?

-Robin

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2009-01-02 07:52:15 Re: Issue in playback of video along with network driver

P SENTHIL KUMAR (INDIA)

Message: 67304

Hi Robin,

Thanks for the reply,

we are using LAN91C9111-NE chip.

Regards, Senthil

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2009-01-02 08:25:46 Re: Issue in playback of video along with network driver

Robin Getz (UNITED STATES)

Message: 67306

Senthil:

The default driver for the LAN91C9111 does not use DMA for data transfers - so it does core I/O. When doing this it must turn off interrupts. This is normally the issue.

You have two things to try (which remove turning off interrupts from the outer loop, and put it inside)-

1) drop in /trunk/arch/blackfin/lib/ins.S into your release. This includes a low latency option. (You basically want r5174 - so you get the changes to Kconfig at the same time)

2) get the updated arch/blackfin/kernel/bfin_dma_5xx.c which fixes up the way that dma was being done (turning interrupts off) (specifically r5799).

-Robin

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2009-01-02 09:40:14 Re: Issue in playback of video along with network driver

P SENTHIL KUMAR (INDIA)

Message: 67309

Robin,

Thanks for the suggestion.

We are facing a issue, enabling and disabling the interrupts in a loop.

After enabling the enabling the interrupt inside the loop, we cant able to do the ftpget.

below issue is the issue we are getting after enabling the interrupt inside the loop in ins.S.

root:/> ftpget -u senthil -p senthil 172.16.6.114 /bin/SDCard_Aud SDCard_Aud