Messages in this thread | | | Subject | Re: [PATCH 01/18] dmaengine: of-dma: Add support for optional router configuration callback | From | Peter Ujfalusi <> | Date | Wed, 28 Oct 2020 11:56:06 +0200 |
| |
Hi Vinod,
On 28/10/2020 7.55, Vinod Koul wrote:
>> To summarize: >> In of_dma_route_allocate() the router does not yet know the channel we >> are going to get. >> In of_dma_xlate() the DMA driver does not yet know if the channel will >> use router or not. >> I need to tell the router the event number it has to send, which is >> based on the channel number I got. > > Sounds reasonable, btw why not pass this information in xlate. Router > will have a different xlate rather than non router right, or is it same.
Yes, the router's have their separate xlate, but in that xlate we do not yet have a channel. I don't know what is the event I need to send from the router to trigger the channel.
> If this information is anyway available in DT might be better to get it > and use from DT
Without a channel number I can not do anything. It is close to a chicken and egg problem.
- Péter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
| |