linux-kernel - Re: [PATCH v6 3/4] PCI: qcom: Add equalization settings for 16.0 GT/s

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Message-ID: <Ztnb-GauC_8D8N-i@hovoldconsulting.com>
Date: Thu, 5 Sep 2024 18:27:36 +0200
From: Johan Hovold <johan@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Richard Zhu <hongxing.zhu@....com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Chuanhua Lei <lchuanhua@...linear.com>,
	Marek Vasut <marek.vasut+renesas@...il.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev, linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	abel.vesa@...aro.org, johan+linaro@...nel.org,
	Shashank Babu Chinta Venkata <quic_schintav@...cinc.com>
Subject: Re: [PATCH v6 3/4] PCI: qcom: Add equalization settings for 16.0 GT/s

On Thu, Sep 05, 2024 at 08:57:42PM +0530, Manivannan Sadhasivam wrote:
> On Wed, Sep 04, 2024 at 11:39:09AM +0200, Johan Hovold wrote:

> > > diff --git a/drivers/pci/controller/dwc/pcie-qcom-common.h b/drivers/pci/controller/dwc/pcie-qcom-common.h
> > > new file mode 100644
> > > index 000000000000..259e04b7bdf9
> > > --- /dev/null
> > > +++ b/drivers/pci/controller/dwc/pcie-qcom-common.h
> > > @@ -0,0 +1,8 @@
> > > +/* SPDX-License-Identifier: GPL-2.0 */
> > > +/*
> > > + * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
> > > + */
> > > +
> > > +#include "pcie-designware.h"
> > 
> > You only need a forward declaration:
> > 
> > 	struct dw_pcie;
> > 
> > > +
> > > +void qcom_pcie_common_set_16gt_eq_settings(struct dw_pcie *pci);
> > 
> > Compile guard still missing.

Sorry, I meant to say *include* guard here.
 
> Perhaps we can just get rid of the Kconfig entry and build it by default for
> both RC and EP drivers? I don't see a value in building it as a separate module.
> And we may also move more common code in the future.

It is already built by default for both drivers. I'm not sure what
you're suggesting here.

Johan