linux-kernel - Re: [PATCH v3 1/3] PCI: pciehp: Add support for disabling in-band presence

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Date:   Mon, 21 Oct 2019 16:38:14 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Stuart Hayes <stuart.w.hayes@...il.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Austin Bolen <austin_bolen@...l.com>, keith.busch@...el.com,
        Alexandru Gagniuc <mr.nuke.me@...il.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        Sinan Kaya <okaya@...nel.org>,
        Oza Pawandeep <poza@...eaurora.org>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, lukas@...ner.de
Subject: Re: [PATCH v3 1/3] PCI: pciehp: Add support for disabling in-band
 presence

On Thu, Oct 17, 2019 at 03:32:54PM -0400, Stuart Hayes wrote:
> From: Alexandru Gagniuc <mr.nuke.me@...il.com>
> 
> The presence detect state (PDS) is normally a logical or of in-band and
> out-of-band presence. As of PCIe 4.0, there is the option to disable
> in-band presence so that the PDS bit always reflects the state of the
> out-of-band presence.
> 
> The recommendation of the PCIe spec is to disable in-band presence
> whenever supported.
> 
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@...il.com>

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>