linux-kernel - Re: [PATCH RESEND v5 00/24] dmaengine: dw-edma: Add RP/EP local DMA controllers support

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Message-ID: <20220825050457.esxb4oc6yht5kw6o@mobilestation>
Date:   Thu, 25 Aug 2022 08:04:57 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>, Frank Li <Frank.Li@....com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Krzysztof Wilczyński <kw@...ux.com>,
        linux-pci@...r.kernel.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v5 00/24] dmaengine: dw-edma: Add RP/EP local DMA
 controllers support

On Thu, Aug 25, 2022 at 10:12:23AM +0530, Vinod Koul wrote:
> On 24-08-22, 17:07, Serge Semin wrote:
> > On Tue, Aug 23, 2022 at 09:15:26PM +0530, Manivannan Sadhasivam wrote:
> > > On Mon, Aug 22, 2022 at 09:53:08PM +0300, Serge Semin wrote:
> 
> > > I've tested this series on Qualcomm SM8450 SoC based dev board. So,
> > > 
> > > Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > > 
> > 
> > Thanks.
> > 
> > > Not sure what is the merging strategy for this one but this series should get
> > > merged into a single tree. Since the PCI patch is touching the designware
> > > driver, merging the series into dmaengine tree might result in conflict later.
> > 
> > Right, the series
> > [PATCH v5 00/20] PCI: dwc: Add generic resources and Baikal-T1 support
> > is supposed to be merged in first. Then this one will get to be
> > applied with no conflicts. That's what I imply in the head of the
> > cover-letter.
> 

> I dont see a dependency of dma patches with PCIe patches? I guess they
> could go thru the respective trees now..?

There is a backward dependency: the PCIe patch in this series depends
on the eDMA patches and the patches in the patchset #3. So should you
merge the eDMA patches via your tree, the later patch in this series
and the patchset #3 would have needed to be applied in there too. So
the patches can't be split up between different branches. Seeing all
the changes (including the DW eDMA part) concern the PCIe device (DW
eDMA is a part of either DW PCIe End-point or Root Port) and we
already agreed to merge all the changes via the PCIe tree, I would
stick to the previous settled agreement.

-Sergey

> 
> -- 
> ~Vinod