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    SubjectRE: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops from DT
    Date
    >From: Stephen Boyd [mailto:sboyd@codeaurora.org]
    >On 10/21, Bjorn Andersson wrote:
    >> hcd_alloc_coherent() and usb_alloc_coherent() ends up allocating
    >> coherent memory on behalf of ci_hdrc driver. But as the ci_hdrc is
    >> instantiated manually it will not have any dma_mem or dma_ops
    >> assigned, which makes the
    >> dma_alloc_coherent() fail on some platforms (e.g. arm64). This patch
    >> solves this by assigning the dma_mem and dma_ops based on the parent's
    >> DeviceTree node.
    >>
    >> Cc: Stephen Boyd <sboyd@codeaurora.org>
    >> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
    >> ---
    >>
    >> Hi Peter,
    >>
    >> After (once more) debugging why USB doesn't work up on the 64-bit
    >> Qualcomm systems I realized that we never concluded on this patch.
    >> Unfortunately I can't find it in my mailbox either, so resending it to restart the
    >discussion.
    >>
    >
    >I thought we were going to go down the route that Arnd has been pushing[1]? That
    >should work, but I haven't tried it yet and there are some more fixes on top from
    >Sriram. I think Sriram is taking over the patch now?
    >

    Yes Stephen. I am incorporating the idea from Arnd and working on those patches.

    Regards,
    Sriram

    >[1] https://patchwork.kernel.org/patch/9319527/
    >
    >--
    >Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
    >Foundation Collaborative Project

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