linux-kernel - Re: [PATCH v3] PCI: Reprogram bridge prefetch registers on resume

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Message-ID: <7b0a5388-5b3a-a6e0-347f-94f87fc2e540@rockbox.org>
Date:   Mon, 1 Oct 2018 16:25:06 +0200
From:   Thomas Martitz <kugel@...kbox.org>
To:     Daniel Drake <drake@...lessm.com>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Linux Upstreaming Team <linux@...lessm.com>,
        nouveau@...ts.freedesktop.org, Linux PM <linux-pm@...r.kernel.org>,
        Peter Wu <peter@...ensteyn.nl>, kherbst@...hat.com,
        andy.shevchenko@...ux.intel.com,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        Keith Busch <keith.busch@...el.com>,
        Jon Derrick <jonathan.derrick@...el.com>,
        David Miller <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>,
        netdev <netdev@...r.kernel.org>, nic_swsd@...ltek.com,
        rchang@...vell.com, Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] PCI: Reprogram bridge prefetch registers on resume

Am 01.10.18 um 06:57 schrieb Daniel Drake:
> On Sun, Sep 30, 2018 at 5:07 AM Thomas Martitz <kugel@...kbox.org> wrote:
>> The latest iteration does not work on my HP system. The GPU fails to
>> power up just like the unpatched kernel.
> 
> That's weird, I would not expect a behaviour change in the latest
> patch. pci_restore_config_dword() has some debug messages, could you
> please make them visible and show logs again?
> Also remind us of the PCI device address of the parent bridge (lspci -vt)
> 

I'll follow up with more the requested information on bugzilla
(Link: https://bugzilla.kernel.org/show_bug.cgi?id=201069).

On a quick re-check, it seems to depend on if I used the eGPU before
the initial suspend. If I run glxgears (with DRI_PRIME=1) before suspend 
it seems fine.

Best regards.