From: Andrew Murray <andrew.murray@arm.com>
To: Dilip Kota <eswara.kota@linux.intel.com>
Cc: jingoohan1@gmail.com, gustavo.pimentel@synopsys.com,
lorenzo.pieralisi@arm.com, robh@kernel.org,
martin.blumenstingl@googlemail.com, linux-pci@vger.kernel.org,
hch@infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, andriy.shevchenko@intel.com,
cheol.yong.kim@intel.com, chuanhua.lei@linux.intel.com,
qi-ming.wu@intel.com
Subject: Re: [PATCH v4 2/3] dwc: PCI: intel: PCIe RC controller driver
Date: Mon, 4 Nov 2019 10:47:19 +0000 [thread overview]
Message-ID: <20191104104718.GK9723@e119886-lin.cambridge.arm.com> (raw)
In-Reply-To: <ecab7cc2-f4c2-ecc0-7f97-92686db1fd1b@linux.intel.com>
On Mon, Nov 04, 2019 at 05:34:54PM +0800, Dilip Kota wrote:
>
> On 11/1/2019 6:59 PM, Andrew Murray wrote:
> > On Tue, Oct 29, 2019 at 04:59:17PM +0800, Dilip Kota wrote:
> > > On 10/25/2019 5:09 PM, Andrew Murray wrote:
> > > > On Tue, Oct 22, 2019 at 05:04:21PM +0800, Dilip Kota wrote:
> > > > > Hi Andrew Murray,
> > > > >
> > > > > On 10/21/2019 9:03 PM, Andrew Murray wrote:
> > > > > > On Mon, Oct 21, 2019 at 02:39:19PM +0800, Dilip Kota wrote:
> > > > > > > +
> > > > > > > +void dw_pcie_link_set_n_fts(struct dw_pcie *pci, u32 n_fts)
> > > > > > > +{
> > > > > > > + u32 val;
> > > > > > > +
> > > > > > > + val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
> > > > > > > + val &= ~PORT_LOGIC_N_FTS;
> > > > > > > + val |= n_fts;
> > > > > > > + dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
> > > > > > > +}
> > > > > > I notice that pcie-artpec6.c (artpec6_pcie_set_nfts) also writes the FTS
> > > > > > and defines a bunch of macros to support this. It doesn't make sense to
> > > > > > duplicate this there. Therefore I think we need to update pcie-artpec6.c
> > > > > > to use this new function.
> > > > > I think we can do in a separate patch after these changes get merged and
> > > > > keep this patch series for intel PCIe driver and required changes in PCIe
> > > > > DesignWare framework.
> > > > The pcie-artpec6.c is a DWC driver as well. So I think we can do all this
> > > > together. This helps reduce the technical debt that will otherwise build up
> > > > in duplicated code.
> > > I agree with you to remove duplicated code, but at this point not sure what
> > > all drivers has defined FTS configuration.
> > > Reviewing all other DWC drivers and removing them can be done in one single
> > > separate patch.
> > I'm not asking to set up an FTS configuration for all DWC drivers, but instead
> > to move this helper function you've created to somewhere like pcie-designware.c
> > and call it from this driver and pcie-artpec6.c.
> What i mean is, we need to check how many of the current DWC drivers are
> configuring the FTS
> and call the helper function.
> Today i have grep all the DWC based drivers and i see pcie-artpec6.c is the
> only driver doing FTS configuration.
>
> I will add the helper function call in pcie-artpec6.c in the next patch
> version.
Thanks that's very much appreciated.
Thanks,
Andrew Murray
>
>
> Regards,
> Dilip
>
>
> >
> > Thanks,
> >
> > Andrew Murray
> >
> > > Regards,
> > > Dilip
next prev parent reply other threads:[~2019-11-04 10:47 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-21 6:39 [PATCH v4 0/3] PCI: Add Intel PCIe Driver and respective dt-binding yaml file Dilip Kota
2019-10-21 6:39 ` [PATCH v4 1/3] dt-bindings: PCI: intel: Add YAML schemas for the PCIe RC controller Dilip Kota
2019-10-21 11:19 ` Andrew Murray
2019-10-22 10:15 ` Dilip Kota
2019-10-24 20:31 ` Martin Blumenstingl
2019-10-29 7:53 ` Dilip Kota
2019-10-25 16:53 ` Rob Herring
2019-10-29 8:34 ` Dilip Kota
2019-10-31 10:51 ` Dilip Kota
2019-10-31 18:35 ` Rob Herring
2019-10-21 6:39 ` [PATCH v4 2/3] dwc: PCI: intel: PCIe RC controller driver Dilip Kota
2019-10-21 8:29 ` Gustavo Pimentel
2019-10-21 10:44 ` Dilip Kota
2019-10-22 10:18 ` Dilip Kota
2019-10-22 11:44 ` andriy.shevchenko
2019-10-25 9:01 ` Andrew Murray
2019-10-29 6:14 ` Dilip Kota
2019-10-21 13:03 ` Andrew Murray
2019-10-22 9:04 ` Dilip Kota
2019-10-25 9:09 ` Andrew Murray
2019-10-29 8:59 ` Dilip Kota
2019-11-01 10:59 ` Andrew Murray
2019-11-04 9:34 ` Dilip Kota
2019-11-04 10:47 ` Andrew Murray [this message]
2019-10-21 17:17 ` Bjorn Helgaas
2019-10-22 9:07 ` Dilip Kota
2019-10-22 13:09 ` Bjorn Helgaas
2019-10-29 7:45 ` Dilip Kota
2019-10-25 13:11 ` kbuild test robot
2019-10-25 13:11 ` [RFC PATCH] dwc: PCI: intel: intel_pcie_msi_init() can be static kbuild test robot
2019-10-21 6:39 ` [PATCH v4 3/3] pci: intel: Add sysfs attributes to configure pcie link Dilip Kota
2019-10-21 8:40 ` Gustavo Pimentel
2019-10-21 10:34 ` Dilip Kota
2019-10-21 13:38 ` Andrew Murray
2019-10-21 17:18 ` Bjorn Helgaas
2019-10-22 9:27 ` Dilip Kota
2019-10-22 12:59 ` Bjorn Helgaas
2019-10-29 9:31 ` Dilip Kota
2019-10-30 22:14 ` Bjorn Helgaas
2019-10-30 23:31 ` Rafael J. Wysocki
2019-10-31 2:56 ` Bjorn Helgaas
2019-10-31 9:13 ` Rafael J. Wysocki
2019-10-31 13:01 ` Bjorn Helgaas
2019-10-31 10:47 ` Dilip Kota
2019-10-31 13:22 ` Bjorn Helgaas
2019-11-01 5:47 ` Dilip Kota
2019-11-01 11:30 ` Andrew Murray
2019-10-29 10:42 ` Rafael J. Wysocki
2019-10-29 12:36 ` Bjorn Helgaas
2019-10-22 9:20 ` Dilip Kota
2019-10-25 9:34 ` Andrew Murray
2019-10-29 9:51 ` Dilip Kota
2019-10-21 8:08 ` [PATCH v4 0/3] PCI: Add Intel PCIe Driver and respective dt-binding yaml file Gustavo Pimentel
2019-10-21 8:31 ` Dilip Kota
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