Re: [PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-11-17 Thread Rafael J. Wysocki
On Mon, Nov 16, 2020 at 9:58 PM David E. Box wrote: > > On Mon, 2020-11-16 at 13:23 -0600, Bjorn Helgaas wrote: > > On Mon, Nov 16, 2020 at 06:53:09PM +0100, Rafael J. Wysocki wrote: > > > On Wed, Oct 7, 2020 at 7:10 PM Bjorn Helgaas > > > wrote: > > > > On Wed, Oct 07, 2020 at 06:53:16PM +0200,

Re: [PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-11-16 Thread David E. Box
On Mon, 2020-11-16 at 13:23 -0600, Bjorn Helgaas wrote: > On Mon, Nov 16, 2020 at 06:53:09PM +0100, Rafael J. Wysocki wrote: > > On Wed, Oct 7, 2020 at 7:10 PM Bjorn Helgaas > > wrote: > > > On Wed, Oct 07, 2020 at 06:53:16PM +0200, Rafael J. Wysocki > > > wrote: > > > > On Wed, Oct 7, 2020 at

Re: [PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-11-16 Thread Bjorn Helgaas
On Mon, Nov 16, 2020 at 06:53:09PM +0100, Rafael J. Wysocki wrote: > On Wed, Oct 7, 2020 at 7:10 PM Bjorn Helgaas wrote: > > On Wed, Oct 07, 2020 at 06:53:16PM +0200, Rafael J. Wysocki wrote: > > > On Wed, Oct 7, 2020 at 6:49 PM David E. Box > > > wrote: > > > > > > > > On Intel Platform

Re: [PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-11-16 Thread Rafael J. Wysocki
On Wed, Oct 7, 2020 at 7:10 PM Bjorn Helgaas wrote: > > On Wed, Oct 07, 2020 at 06:53:16PM +0200, Rafael J. Wysocki wrote: > > On Wed, Oct 7, 2020 at 6:49 PM David E. Box > > wrote: > > > > > > On Intel Platform Controller Hubs (PCH) since Cannon Lake, the Precision > > > Time Measurement (PTM)

[PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-10-07 Thread David E. Box
On Intel Platform Controller Hubs (PCH) since Cannon Lake, the Precision Time Measurement (PTM) capability can prevent PCIe root ports from power gating during suspend-to-idle, causing increased power consumption on systems that suspend using Low Power S0 Idle [1]. The issue is yet to be root

Re: [PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-10-07 Thread Bjorn Helgaas
On Wed, Oct 07, 2020 at 06:53:16PM +0200, Rafael J. Wysocki wrote: > On Wed, Oct 7, 2020 at 6:49 PM David E. Box > wrote: > > > > On Intel Platform Controller Hubs (PCH) since Cannon Lake, the Precision > > Time Measurement (PTM) capability can prevent PCIe root ports from power > > gating

Re: [PATCH] PCI: Disable PTM during suspend on Intel PCI bridges

2020-10-07 Thread Rafael J. Wysocki
On Wed, Oct 7, 2020 at 6:49 PM David E. Box wrote: > > On Intel Platform Controller Hubs (PCH) since Cannon Lake, the Precision > Time Measurement (PTM) capability can prevent PCIe root ports from power > gating during suspend-to-idle, causing increased power consumption on > systems that suspend