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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Mathias Nyman <mathias.nyman@intel.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Eddie Hung" <eddie.hung@mediatek.com>,
	Yun-Chien Yu <yun-chien.yu@mediatek.com>
Subject: [PATCH] usb: xhci: skip re-check pending port event if hibernated
Date: Thu, 9 Dec 2021 15:22:18 +0800	[thread overview]
Message-ID: <20211209072218.21651-1-chunfeng.yun@mediatek.com> (raw)

When xHCI controller hibernated, the root hub lost power, if controller
support Port Power Control (PPC), PP is not set at xhci_resume() and
set by hub_reset_resume() later, so no need check pending port event.
If PPC is not supported, device is disconneced, seems do not send out
U3 LFPS wake signal, no need re-check again and drop 120ms delay to
save resume time.

Reported-by: Yun-Chien Yu <yun-chien.yu@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/usb/host/xhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 902f410874e8..686d8e6f03f6 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1235,7 +1235,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		 * the first wake signalling failed, give it that chance.
 		 */
 		pending_portevent = xhci_pending_portevent(xhci);
-		if (!pending_portevent) {
+		if (!pending_portevent && !hibernated) {
 			msleep(120);
 			pending_portevent = xhci_pending_portevent(xhci);
 		}
-- 
2.18.0


WARNING: multiple messages have this Message-ID (diff)
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Mathias Nyman <mathias.nyman@intel.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Eddie Hung" <eddie.hung@mediatek.com>,
	Yun-Chien Yu <yun-chien.yu@mediatek.com>
Subject: [PATCH] usb: xhci: skip re-check pending port event if hibernated
Date: Thu, 9 Dec 2021 15:22:18 +0800	[thread overview]
Message-ID: <20211209072218.21651-1-chunfeng.yun@mediatek.com> (raw)

When xHCI controller hibernated, the root hub lost power, if controller
support Port Power Control (PPC), PP is not set at xhci_resume() and
set by hub_reset_resume() later, so no need check pending port event.
If PPC is not supported, device is disconneced, seems do not send out
U3 LFPS wake signal, no need re-check again and drop 120ms delay to
save resume time.

Reported-by: Yun-Chien Yu <yun-chien.yu@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/usb/host/xhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 902f410874e8..686d8e6f03f6 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1235,7 +1235,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		 * the first wake signalling failed, give it that chance.
 		 */
 		pending_portevent = xhci_pending_portevent(xhci);
-		if (!pending_portevent) {
+		if (!pending_portevent && !hibernated) {
 			msleep(120);
 			pending_portevent = xhci_pending_portevent(xhci);
 		}
-- 
2.18.0


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Mathias Nyman <mathias.nyman@intel.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Eddie Hung" <eddie.hung@mediatek.com>,
	Yun-Chien Yu <yun-chien.yu@mediatek.com>
Subject: [PATCH] usb: xhci: skip re-check pending port event if hibernated
Date: Thu, 9 Dec 2021 15:22:18 +0800	[thread overview]
Message-ID: <20211209072218.21651-1-chunfeng.yun@mediatek.com> (raw)

When xHCI controller hibernated, the root hub lost power, if controller
support Port Power Control (PPC), PP is not set at xhci_resume() and
set by hub_reset_resume() later, so no need check pending port event.
If PPC is not supported, device is disconneced, seems do not send out
U3 LFPS wake signal, no need re-check again and drop 120ms delay to
save resume time.

Reported-by: Yun-Chien Yu <yun-chien.yu@mediatek.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/usb/host/xhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 902f410874e8..686d8e6f03f6 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1235,7 +1235,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 		 * the first wake signalling failed, give it that chance.
 		 */
 		pending_portevent = xhci_pending_portevent(xhci);
-		if (!pending_portevent) {
+		if (!pending_portevent && !hibernated) {
 			msleep(120);
 			pending_portevent = xhci_pending_portevent(xhci);
 		}
-- 
2.18.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2021-12-09  7:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-09  7:22 Chunfeng Yun [this message]
2021-12-09  7:22 ` [PATCH] usb: xhci: skip re-check pending port event if hibernated Chunfeng Yun
2021-12-09  7:22 ` Chunfeng Yun
2021-12-10 13:33 ` Mathias Nyman
2021-12-10 13:33   ` Mathias Nyman
2021-12-10 13:33   ` Mathias Nyman
2021-12-14  8:00   ` Jun Li
2021-12-14  8:00     ` Jun Li
2021-12-14  8:00     ` Jun Li
2021-12-14 10:05     ` Mathias Nyman
2021-12-14 10:05       ` Mathias Nyman
2021-12-14 10:05       ` Mathias Nyman
2021-12-15  2:09       ` Jun Li
2021-12-15  2:09         ` Jun Li
2021-12-15  2:09         ` Jun Li
2021-12-17  9:40       ` Chunfeng Yun
2021-12-17  9:40         ` Chunfeng Yun
2021-12-17  9:40         ` Chunfeng Yun

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