From: Tony Lindgren <tony@atomide.com>
To: Brian Norris <briannorris@chromium.org>
Cc: jeffy <jeffy.chen@rock-chips.com>,
linux-kernel@vger.kernel.org, bhelgaas@google.com,
shawn.lin@rock-chips.com, dianders@chromium.org,
Heiko Stuebner <heiko@sntech.de>,
linux-pci@vger.kernel.org, linux-rockchip@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC PATCH v2 1/3] PCI: rockchip: Add support for pcie wake irq
Date: Wed, 20 Dec 2017 11:19:12 -0800 [thread overview]
Message-ID: <20171220191912.GM3875@atomide.com> (raw)
In-Reply-To: <20171219004811.GA216620@google.com>
Hi,
* Brian Norris <briannorris@chromium.org> [171219 00:50]:
> On Wed, Aug 23, 2017 at 09:32:39AM +0800, Jeffy Chen wrote:
>
> Did this problem ever get resolved? To be clear, I believe the problem
> at hand is:
>
> (a) in suspend/resume (not runtime PM; we may not even have runtime PM
> support for most PCI devices)
It seems it should be enough to implement runtime PM in the PCI
controller. Isn't each PCI WAKE# line is wired from each PCI device
to the PCI controller?
Then the PCI controller can figure out from which PCI device the
WAKE# came from.
> Options I can think of:
> (1) implement runtime PM callbacks for all PCI devices, where we clear
> any PME status and ensure WAKE# stops asserting [1]
I don't think this is needed, it should be enough to have just
the PCI controller implement runtime PM :)
Regards,
Tony
WARNING: multiple messages have this Message-ID (diff)
From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH v2 1/3] PCI: rockchip: Add support for pcie wake irq
Date: Wed, 20 Dec 2017 11:19:12 -0800 [thread overview]
Message-ID: <20171220191912.GM3875@atomide.com> (raw)
In-Reply-To: <20171219004811.GA216620@google.com>
Hi,
* Brian Norris <briannorris@chromium.org> [171219 00:50]:
> On Wed, Aug 23, 2017 at 09:32:39AM +0800, Jeffy Chen wrote:
>
> Did this problem ever get resolved? To be clear, I believe the problem
> at hand is:
>
> (a) in suspend/resume (not runtime PM; we may not even have runtime PM
> support for most PCI devices)
It seems it should be enough to implement runtime PM in the PCI
controller. Isn't each PCI WAKE# line is wired from each PCI device
to the PCI controller?
Then the PCI controller can figure out from which PCI device the
WAKE# came from.
> Options I can think of:
> (1) implement runtime PM callbacks for all PCI devices, where we clear
> any PME status and ensure WAKE# stops asserting [1]
I don't think this is needed, it should be enough to have just
the PCI controller implement runtime PM :)
Regards,
Tony
next prev parent reply other threads:[~2017-12-20 19:19 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-17 12:04 [RFC PATCH v2 0/3] PCI: rockchip: Move PCIE_WAKE handling into rockchip pcie driver Jeffy Chen
2017-08-17 12:04 ` Jeffy Chen
2017-08-17 12:04 ` Jeffy Chen
2017-08-17 12:04 ` [RFC PATCH v2 1/3] PCI: rockchip: Add support for pcie wake irq Jeffy Chen
2017-08-17 12:04 ` Jeffy Chen
2017-08-18 7:23 ` Shawn Lin
2017-08-18 7:23 ` Shawn Lin
2017-08-18 7:23 ` Shawn Lin
2017-08-18 8:32 ` jeffy
2017-08-18 8:32 ` jeffy
2017-08-18 8:32 ` jeffy
2017-08-18 17:01 ` Brian Norris
2017-08-18 17:01 ` Brian Norris
2017-08-18 17:01 ` Brian Norris
2017-08-18 17:07 ` Brian Norris
2017-08-18 17:07 ` Brian Norris
2017-08-18 17:07 ` Brian Norris
2017-08-18 17:47 ` jeffy
2017-08-18 17:47 ` jeffy
2017-08-18 17:47 ` jeffy
2017-08-18 18:28 ` Tony Lindgren
2017-08-18 18:28 ` Tony Lindgren
2017-08-18 18:28 ` Tony Lindgren
2017-08-18 18:14 ` Tony Lindgren
2017-08-18 18:14 ` Tony Lindgren
2017-08-18 18:14 ` Tony Lindgren
2017-08-18 20:05 ` jeffy
2017-08-18 20:05 ` jeffy
2017-08-18 20:05 ` jeffy
2017-08-22 17:26 ` Tony Lindgren
2017-08-22 17:26 ` Tony Lindgren
2017-08-22 17:26 ` Tony Lindgren
2017-08-23 1:32 ` jeffy
2017-08-23 1:32 ` jeffy
2017-08-23 1:57 ` Brian Norris
2017-08-23 1:57 ` Brian Norris
2017-08-23 1:57 ` Brian Norris
2017-08-23 2:16 ` jeffy
2017-08-23 2:16 ` jeffy
2017-08-23 2:16 ` jeffy
2017-12-19 0:48 ` Brian Norris
2017-12-19 0:48 ` Brian Norris
2017-12-19 0:48 ` Brian Norris
2017-12-20 19:19 ` Tony Lindgren [this message]
2017-12-20 19:19 ` Tony Lindgren
2017-12-22 23:20 ` Brian Norris
2017-12-22 23:20 ` Brian Norris
2017-12-22 23:20 ` Brian Norris
2017-12-23 16:36 ` Tony Lindgren
2017-12-23 16:36 ` Tony Lindgren
2017-12-23 16:36 ` Tony Lindgren
2017-08-17 12:04 ` [RFC PATCH v2 2/3] dt-bindings: " Jeffy Chen
2017-08-17 12:04 ` Jeffy Chen
2017-08-17 12:04 ` [RFC PATCH v2 3/3] arm64: dts: rockchip: Handle pcie wake in pcie driver for Gru Jeffy Chen
2017-08-17 12:04 ` Jeffy Chen
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