linux-kernel - Re: [PATCH v1 2/6] dmaengine: dw-edma: Introduce helpers for getting the eDMA/HDMA max channel count

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Date: Tue, 30 Jan 2024 14:18:03 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Mrinmay Sarkar <quic_msarkar@...cinc.com>, vkoul@...nel.org,
	jingoohan1@...il.com, conor+dt@...nel.org, konrad.dybcio@...aro.org,
	robh+dt@...nel.org, quic_shazhuss@...cinc.com,
	quic_nitegupt@...cinc.com, quic_ramkri@...cinc.com,
	quic_nayiluri@...cinc.com, quic_krichai@...cinc.com,
	quic_vbadigan@...cinc.com, quic_parass@...cinc.com,
	quic_schintav@...cinc.com, quic_shijjose@...cinc.com,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	Serge Semin <fancer.lancer@...il.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	mhi@...ts.linux.dev
Subject: Re: [PATCH v1 2/6] dmaengine: dw-edma: Introduce helpers for getting
 the eDMA/HDMA max channel count

On Fri, Jan 19, 2024 at 03:26:56PM +0200, Dmitry Baryshkov wrote:
> On Fri, 19 Jan 2024 at 15:00, Mrinmay Sarkar <quic_msarkar@...cinc.com> wrote:
> >
> > From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> >
> > Add common helpers for getting the eDMA/HDMA max channel count.
> >
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>
> > ---
> >  drivers/dma/dw-edma/dw-edma-core.c           | 18 ++++++++++++++++++
> >  drivers/pci/controller/dwc/pcie-designware.c |  6 +++---
> >  include/linux/dma/edma.h                     | 14 ++++++++++++++
> >  3 files changed, 35 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
> > index 7fe1c19..2bd6e43 100644
> > --- a/drivers/dma/dw-edma/dw-edma-core.c
> > +++ b/drivers/dma/dw-edma/dw-edma-core.c
> > @@ -902,6 +902,24 @@ static int dw_edma_irq_request(struct dw_edma *dw,
> >         return err;
> >  }
> >
> > +static u32 dw_edma_get_max_ch(enum dw_edma_map_format mf, enum dw_edma_dir dir)
> > +{
> > +       if (mf == EDMA_MF_HDMA_NATIVE)
> > +               return HDMA_MAX_NR_CH;
> 
> This will break unless patch 5 is applied.

I believe you are referring to patch 4.

> Please move the
> corresponding definition to this path.
>

Right. But it can be fixed by reordering the patches.

Mrinmay, please move patch 4/6 ahead of this one.

- Mani
 
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