traffic controller priority adjustment

traffic controller priority adjustment

[Zgembo Adislic]

Hello,

I'd like to adjust the priority register for EMIFF arbitration, so that DMA will get priority over other masters (MPU, DSP).  I wonder if there is  an API in kernel for this? 

I am using OMAP5910 and linux kernel 2.6.8.1. 

Any opinions about this?

Zgembo


       
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Re: traffic controller priority adjustment

[sandeep lahane]

On 8/17/07, Zgembo Adislic <adislic_zgembo@yahoo.com> wrote:
> Hello,
>
> I'd like to adjust the priority register for EMIFF arbitration, so that DMA will get priority over other masters (MPU, DSP).  I wonder if there is  an API in kernel for this?
>
> I am using OMAP5910 and linux kernel 2.6.8.1.
>
> Any opinions about this?
>
> Zgembo
>
>
>
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>

I am not sure I understood you fully, but you might want to have a
look at  plat-omap/dma.c.

omap_set_dma_priority(int dst_port, int priority) - 2.6.17
omap_set_dma_priority(int lch, int dst_port, int priority) - 2.6.19

No idea about 2.6.8.

-- 

Regards,
Sandeep.