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SubjectRE: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops from DT
>From: Stephen Boyd []
>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 <>
>> Signed-off-by: Bjorn Andersson <>
>> ---
>> 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
>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.


>Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
>Foundation Collaborative Project

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