linux-kernel - Re: [PATCH 0/4] dmaengine: qcom: bam_dma: fixes for remotely controlled bam

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Message-ID: <20180117101835.GM18649@localhost>
Date:   Wed, 17 Jan 2018 15:48:35 +0530
From:   Vinod Koul <vinod.koul@...el.com>
To:     srinivas.kandagatla@...aro.org
Cc:     Andy Gross <andy.gross@...aro.org>, dmaengine@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Brown <david.brown@...aro.org>,
        Dan Williams <dan.j.williams@...el.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        yanhe@...cinc.com, ramkri@....qualcomm.com, sdharia@...cinc.com
Subject: Re: [PATCH 0/4] dmaengine: qcom: bam_dma: fixes for remotely
 controlled bam

On Tue, Jan 16, 2018 at 07:02:32PM +0000, srinivas.kandagatla@...aro.org wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> 
> Hi Andy,
> 
> I did hit few issues while trying out SLIMBus BAM on DB820c, this BAM instance
> is remotely controlled and powered up after ADSP is booted using QMI commands.

What do you mean by "remotely controlled" in this series?

> 
> Firstly some of the master registers are written even when the BAM is remotely
> controlled, and secondly reading registers when bam is not ready yet.
> 
> These 4 patches address these issues, there are few more issues like doing PM
> in simillar usecase, these will be addressed soon.
> 
> Thanks,
> Srini
> 
> Srinivas Kandagatla (4):
>   dmaengine: qcom: bam_dma: make bam clk optional
>   dmaengine: qcom: bam_dma: add num-channels binding for remotely
>     controlled
>   dmaengine: qcom: bam_dma: do not write to global regs in remote mode
>   dmaengine: qcom: bam_dma: Add num-ees dt binding for remotely
>     controlled
> 
>  .../devicetree/bindings/dma/qcom_bam_dma.txt       |  4 ++
>  drivers/dma/qcom/bam_dma.c                         | 56 +++++++++++++++-------
>  2 files changed, 43 insertions(+), 17 deletions(-)
> 
> -- 
> 2.15.1
> 

-- 
~Vinod