Hi everyone
I'm working on the CSI driver.I failed to understand ( lack of
documentation) which DMA is used to transfer from the CSI.
I can only find a reference in the bsp driver for the DRAM
CPU_DRAM_PADDR_ORG = 0x40000000
HW_DMA_OFFSET= 0x00000000
dma_addr_t addr_org = videobuf_to_dma_contig(vb_buf) -
CPU_DRAM_PADDR_ORG + HW_DMA_OFFSET;
And in the current sunxi 3.4
addr_org = videobuf_to_dma_contig((struct videobuf_buffer *)buf);
if( (addr_org&0x40000000)!=0 )
{
addr_org-=0x40000000;
csi_dbg(3,"csi recal mem_addr=%p\n",addr_org);
}
There is also a reference to the DMA in os_mem_alloc which is used by the
ISP front end.
mem_man->dma_addr = mem_man->phy_addr + HW_DMA_OFFSET-
CPU_DRAM_PADDR_ORG;
Any hints will be appreciated.
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