On Tue, Sep 12, 2023 at 4:11 PM Tomasz Figa <tfiga@xxxxxxxxxxxx> wrote: > Is your DMA device restricted only to the bottom-most 4 GB (32-bit DMA > address)? If yes, would it make sense to also allocate from that area rather > than bouncing the memory? The DMA device use 32-bit DMA address. >From user space, can't control the v4l2 buffer address, may still change the code of vb2_dma_sg_alloc(). BRs, Fang Hui
