RE: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops from DT

From	Sriram Dash <sriram.dash@nxp.com>
Newsgroups	linux.kernel
Subject	RE: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops from DT
Date	2016-10-22 08:30 +0200
Message-ID	<suXYB-8ei-1@gated-at.bofh.it> (permalink)
References	<r4RnX-Sn-7@gated-at.bofh.it> <suLkK-8jc-43@gated-at.bofh.it> <suLXt-kW-49@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

>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

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[RESEND PATCH] usb: chipidea: Configure DMA properties and ops from DT Bjorn Andersson <bjorn.andersson@linaro.org> - 2016-10-21 19:00 +0200
  Re: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops  from DT Stephen Boyd <sboyd@codeaurora.org> - 2016-10-21 19:40 +0200
    Re: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops  from DT Bjorn Andersson <bjorn.andersson@linaro.org> - 2016-10-21 20:00 +0200
    RE: [RESEND PATCH] usb: chipidea: Configure DMA properties and ops  from DT Sriram Dash <sriram.dash@nxp.com> - 2016-10-22 08:30 +0200

csiph-web