what causes DM6441 resizer to hang and how to recover from it?

Yushu Shi

In our application, we use the resizer to scale the image in DDR from 320x240 to 800x600.

We don't use the driver code, but program the registers directly.

The code can work fine for several minutes or even one hour before the resizer hangs. The only parameter gets changed in the last frame is the source image address because we use a ping-pong buffer to hold the source images.

The PCR register always read back as 2.

Any clue what may cause this? Is there another way to get out from this deadlock state besides reset the whole VPSS?

Thanks,

Yushu Shi

over 15 years ago

0 Jesse Villarreal over 15 years ago

TI__Expert 5555 points

After the hang, are the Resizer buffer overflow or underflow registers set (VPSSBL register map)?

If you encounter the lockup, resetting whole VPSS is only way to recover.

0 zanget over 11 years ago in reply to Jesse Villarreal

Expert 2150 points

hi, Villarreal

would please kind advice how to do the whole vpss reset ?

we encounter problem when we do vpss reset with RGB output.

Regards, Mike

0 Jesse Villarreal over 11 years ago in reply to zanget

TI__Expert 5555 points

It can be reset by transitioning to the SyncReset state of the PSC. Note that the VPSS has two module domains, the VPSSmstr processing domain and the VPSSslv register interface. A full reset would transition both of these module domains. In doing this, be sure to account for the reset of he HW state in your software.

0 zanget over 11 years ago in reply to Jesse Villarreal

Expert 2150 points

hi, Jesse

Im glad for your replay.

i want to kindly ask you if you get any details for this.

thanks very for your advice very much again. regards, Mike.

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what causes DM6441 resizer to hang and how to recover from it?