On 25-11-20, 18:39, Reddy, MallikarjunaX wrote: > > > > > desc needs to be configure for each dma channel and the remapped address of > > > > > the IGP & EGP is desc base adress. > > > > Why should this address not passed as src_addr/dst_addr? > > > src_addr/dst_addr is the data pointer. Data pointer indicates address > > > pointer of data buffer. > > > > > > ldma_chan_desc_cfg() carries the descriptor address. > > > > > > The descriptor list entry contains the data pointer, which points to the > > > data section in the memory. > > > > > > So we should not use src_addr/dst_addr as desc base address. > > Okay sounds reasonable. why is this using in API here? > descriptor base address needs to be write into the dma register (DMA_CDBA). Why cant descriptor be allocated by damenegine driver, passed to client as we normally do in prep_* callbacks ? Why do you need a custom API -- ~Vinod
