Messages in this thread | | | Date | Fri, 21 Oct 2016 10:53:50 -0700 | From | Bjorn Andersson <> | Subject | Re: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops from DT |
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On Fri 21 Oct 10:38 PDT 2016, Stephen Boyd wrote:
> 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? > > [1] https://patchwork.kernel.org/patch/9319527/
Thanks for the pointer, I've heard about it but couldn't find it.
It does make me further wonder about the multi-device model of these drivers, but I agree with you that it looks like the patch would solve our issue.
Regards, Bjorn
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