linux-kernel - RE: [PATCH 0/5] pmdomain: core: Introduce device_set_out_band

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Message-ID:
 <PAXPR04MB8459B59B752E5D1F4D7100C58812A@PAXPR04MB8459.eurprd04.prod.outlook.com>
Date: Mon, 22 Sep 2025 02:18:47 +0000
From: Peng Fan <peng.fan@....com>
To: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
	Pavel Machek <pavel@...nel.org>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Danilo Krummrich <dakr@...nel.org>, Ulf Hansson
	<ulf.hansson@...aro.org>, Peter Chen <peter.chen@...nel.org>, Shawn Guo
	<shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix
 Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>
CC: "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, Xu Yang <xu.yang_2@....com>
Subject: RE: [PATCH 0/5] pmdomain: core: Introduce device_set_out_band_wakeup
 and use it in usb

Please ignore this patchset.  V4 was missed in subject, 
I will add V4 and resend.

Thanks,
Peng.

> Subject: [PATCH 0/5] pmdomain: core: Introduce
> device_set_out_band_wakeup and use it in usb
> 
> To i.MX95, USB2 and USB3 are in HSIOMIX domain, but there is always
> on logic to make USB2 and USB3 has wakeup capability when HSIOMIX
> power domain is in off state. So when in system-suspend state,
> USB2/USB3 could wakeup the system even the USB2/USB3 HSIOMIX
> power domain is turned off. This means USB2/USB3 has out-of-band
> wakeup capability to wakeup system from suspended state.
> 
> Without this patchset, if USB2/USB3 are configured with wakeup
> enabled, the HSIOMIX power domain will not be turned off. This leads
> to more power consumed in system suspend state.
> 
> This patchset introduces device_set_out_band_wakeup and
> device_out_band_wakeup two APIs to set out-of-band and query the
> flag.
> In genpd_finish_suspend, there is a check, if out-of-band is set, it will
> continue to turn off the power domain. In genpd resume flow, there is
> a similar check to turn on the power domain.
> 
> Patch 1,2 introduces device_set_out_band_wakeup and
> device_out_band_wakeup Patch 3 and 4 are drivers changes to use
> device_out_band_wakeup
> 
> More old discussions:
> https://lore.kernel.org/linux-pm/20250311083239.3336439-1-
> peng.fan@....nxp.com/
> 
> This is pick up of [1]
> This V2 patchset
> - includes usb driver changes to give people a full picture on how it is
> used.
> - Rebased next-20250729 to resolve conflicts
> 
> [1]https://lore.kernel.org/linux-pm/20250311083239.3336439-1-
> peng.fan@....nxp.com/
> 
> To: Rafael J. Wysocki <rafael@...nel.org>
> To: Pavel Machek <pavel@...nel.org>
> To: Len Brown <lenb@...nel.org>
> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> To: Danilo Krummrich <dakr@...nel.org>
> To: Ulf Hansson <ulf.hansson@...aro.org>
> To: Peter Chen <peter.chen@...nel.org>
> To: Shawn Guo <shawnguo@...nel.org>
> To: Sascha Hauer <s.hauer@...gutronix.de>
> To: Pengutronix Kernel Team <kernel@...gutronix.de>
> To: Fabio Estevam <festevam@...il.com>
> To: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
> Cc: linux-pm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-usb@...r.kernel.org
> Cc: imx@...ts.linux.dev
> Cc: linux-arm-kernel@...ts.infradead.org
> Signed-off-by: Peng Fan <peng.fan@....com>
> 
> Changes in v4:
> - Split device_set_out_band_wakeup API and pmdomain changes into
> patch 1
>   and 2 and clear the flag in device_prepare (from Ulf)
> - Add R-b in patch 2
> - Move the call of device_set_out_band_wakeup to system suspend
>   callback in patch 3 and 4. (from Ulf)
> - For patch 3,4, I still keep the Tags, since compared with V3, it is quite
>   small changes.
> - Link to v3: https://lore.kernel.org/r/20250902-pm-v3-0-
> ffadbb454cdc@....com
> 
> Changes in v3:
> - Add a new patch from Xu Yang to detach power domain for ci hdrc
> - Add A-b for patch 4
> - Link to v2: https://lore.kernel.org/r/20250801-pm-v2-0-
> 97c8fb2a433c@....com
> 
> ---
> Peng Fan (4):
>       PM: wakeup: Add out-of-band system wakeup support for devices
>       PM: domains: Allow power-off for out-of-band wakeup-capable
> devices
>       usb: chipidea: ci_hdrc_imx: Set out of band wakeup for i.MX95
>       usb: dwc3: imx8mp: Set out of band wakeup for i.MX95
> 
> Xu Yang (1):
>       usb: chipidea: core: detach power domain for ci_hdrc platform
> device
> 
>  drivers/base/power/main.c          |  1 +
>  drivers/pmdomain/core.c            |  6 ++++--
>  drivers/usb/chipidea/ci_hdrc_imx.c | 11 ++++++++++-
>  drivers/usb/chipidea/core.c        |  3 +++
>  drivers/usb/dwc3/dwc3-imx8mp.c     |  9 +++++++--
>  include/linux/pm.h                 |  1 +
>  include/linux/pm_wakeup.h          | 17 +++++++++++++++++
>  include/linux/usb/chipidea.h       |  1 +
>  8 files changed, 44 insertions(+), 5 deletions(-)
> ---
> base-commit: 8f7f8b1b3f4c613dd886f53f768f82816b41eaa3
> change-id: 20250919-pm-v4-1879568de500
> 
> Best regards,
> --
> Peng Fan <peng.fan@....com>