linux-kernel - Re: [PATCH v3 18/18] PCI: j721e: add suspend and resume support

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Date: Fri, 16 Feb 2024 16:18:26 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: Thomas Richard <thomas.richard@...tlin.com>
CC: Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski
	<brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>, Tony Lindgren
	<tony@...mide.com>,
        Haojian Zhuang <haojian.zhuang@...aro.org>,
        Vignesh R
	<vigneshr@...com>, Aaro Koskinen <aaro.koskinen@....fi>,
        Janusz Krzysztofik
	<jmkrzyszt@...il.com>,
        Andi Shyti <andi.shyti@...nel.org>, Peter Rosin
	<peda@...ntia.se>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I
	<kishon@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Lorenzo
 Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński
	<kw@...ux.com>,
        Rob Herring <robh@...nel.org>, Bjorn Helgaas
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        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-omap@...r.kernel.org>,
        <linux-i2c@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <linux-pci@...r.kernel.org>, <gregory.clement@...tlin.com>,
        <theo.lebrun@...tlin.com>, <thomas.petazzoni@...tlin.com>,
        <u-kumar1@...com>, <s-vadapalli@...com>
Subject: Re: [PATCH v3 18/18] PCI: j721e: add suspend and resume support

On 24/02/15 04:18PM, Thomas Richard wrote:
> From: Théo Lebrun <theo.lebrun@...tlin.com>
> 
> Add suspend and resume support. Only the rc mode is supported.
> 
> During the suspend stage PERST# is asserted, then deasserted during the
> resume stage.

Wouldn't this imply that the Endpoint device will be reset and therefore
lose context? Or is it expected that the driver corresponding to the
Endpoint Function in Linux will restore the state on resume, post reset?

Regards,
Siddharth.