linux-kernel - Re: [PATCH 11/11] PCI: tegra194: Rework {start/stop}

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Date: Fri, 22 Mar 2024 17:11:05 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: 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>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
	linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org, mhi@...ts.linux.dev,
	linux-tegra@...r.kernel.org, Vidya Sagar <vidyas@...dia.com>
Subject: Re: [PATCH 11/11] PCI: tegra194: Rework {start/stop}_link()
 callbacks implementation

On Thu, Mar 14, 2024 at 08:53:50PM +0530, Manivannan Sadhasivam wrote:
> DWC specific start_link() and stop_link() callbacks are supposed to start
> and stop the link training of the PCIe bus. But the current endpoint
> implementation of this driver enables/disables the PERST# IRQ.
> 
> Even though this is not causing any issues, this creates inconsistency
> among the EP controller drivers. So for the sake of consistency, let's just
> start/stop the link training in these callbacks.
> 
> Also, PERST# IRQ is now enabled from the start itself, thus allowing the
> controller driver to initialize the registers when PERST# gets deasserted
> without waiting for the user intervention though configfs.
> 
> Cc: Vidya Sagar <vidyas@...dia.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---

Reviewed-by: Niklas Cassel <cassel@...nel.org>