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From: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
To: Felipe Balbi <balbi@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: John Youn <John.Youn@synopsys.com>,
	Artur Petrosyan <Arthur.Petrosyan@synopsys.com>,
	Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Subject: [PATCH v2 04/12] usb: dwc2: Add exit clock gating from wakeup interrupt
Date: Tue, 13 Apr 2021 11:36:30 +0400	[thread overview]
Message-ID: <20210413073630.EF2CEA0094@mailhost.synopsys.com> (raw)
In-Reply-To: <cover.1618297800.git.Arthur.Petrosyan@synopsys.com>

Added exit from clock gating mode when wakeup interrupt
is detected. To exit from the clock gating
in device mode "dwc2_gadget_exit_clock_gating()"
function is used with rem_wakeup parameter 0. To exit
clock gating in host mode "dwc2_host_exit_clock_gating()"
with rem_wakeup parameter 1.

Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
---
 drivers/usb/dwc2/core_intr.c | 33 ++++++++++++++++++++++-----------
 1 file changed, 22 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index ab7fe303c0f9..c764407e7633 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -415,17 +415,24 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 	if (dwc2_is_device_mode(hsotg)) {
 		dev_dbg(hsotg->dev, "DSTS=0x%0x\n",
 			dwc2_readl(hsotg, DSTS));
-		if (hsotg->lx_state == DWC2_L2 && hsotg->in_ppd) {
-			u32 dctl = dwc2_readl(hsotg, DCTL);
-			/* Clear Remote Wakeup Signaling */
-			dctl &= ~DCTL_RMTWKUPSIG;
-			dwc2_writel(hsotg, dctl, DCTL);
-			ret = dwc2_exit_partial_power_down(hsotg, 1,
-							   true);
-			if (ret)
-				dev_err(hsotg->dev,
-					"exit partial_power_down failed\n");
-			call_gadget(hsotg, resume);
+		if (hsotg->lx_state == DWC2_L2) {
+			if (hsotg->in_ppd) {
+				u32 dctl = dwc2_readl(hsotg, DCTL);
+				/* Clear Remote Wakeup Signaling */
+				dctl &= ~DCTL_RMTWKUPSIG;
+				dwc2_writel(hsotg, dctl, DCTL);
+				ret = dwc2_exit_partial_power_down(hsotg, 1,
+								   true);
+				if (ret)
+					dev_err(hsotg->dev,
+						"exit partial_power_down failed\n");
+				call_gadget(hsotg, resume);
+			}
+
+			/* Exit gadget mode clock gating. */
+			if (hsotg->params.power_down ==
+			    DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended)
+				dwc2_gadget_exit_clock_gating(hsotg, 0);
 		} else {
 			/* Change to L0 state */
 			hsotg->lx_state = DWC2_L0;
@@ -440,6 +447,10 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 						"exit partial_power_down failed\n");
 			}
 
+			if (hsotg->params.power_down ==
+			    DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended)
+				dwc2_host_exit_clock_gating(hsotg, 1);
+
 			/*
 			 * If we've got this quirk then the PHY is stuck upon
 			 * wakeup.  Assert reset.  This will propagate out and
-- 
2.25.1


  parent reply	other threads:[~2021-04-13  7:36 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <cover.1618297800.git.Arthur.Petrosyan@synopsys.com>
2021-04-13  7:16 ` [PATCH 01/12] usb: dwc2: Add device clock gating support functions Artur Petrosyan
2021-04-13  7:16 ` [PATCH 02/12] usb: dwc2: Add host " Artur Petrosyan
2021-04-13  7:16 ` [PATCH 03/12] usb: dwc2: Allow entering clock gating from USB_SUSPEND interrupt Artur Petrosyan
2021-04-13  9:25   ` Sergei Shtylyov
2021-04-13  7:16 ` [PATCH 04/12] usb: dwc2: Add exit clock gating from wakeup interrupt Artur Petrosyan
2021-04-13  7:16 ` [PATCH 05/12] usb: dwc2: Add exit clock gating from session request interrupt Artur Petrosyan
2021-04-13  7:16 ` [PATCH 06/12] usb: dwc2: Add exit clock gating when port reset is asserted Artur Petrosyan
2021-04-13  7:17 ` [PATCH 07/12] usb: dwc2: Update enter clock gating when port is suspended Artur Petrosyan
2021-04-13  9:22   ` Sergei Shtylyov
2021-04-13 10:24     ` Greg Kroah-Hartman
2021-04-13  7:17 ` [PATCH 08/12] usb: dwc2: Update exit clock gating when port is resumed Artur Petrosyan
2021-04-13  7:17 ` [PATCH 09/12] usb: dwc2: Allow exit clock gating in urb enqueue Artur Petrosyan
2021-04-13  7:17 ` [PATCH 10/12] usb: dwc2: Add clock gating entering flow by system suspend Artur Petrosyan
2021-04-13  7:17 ` [PATCH 11/12] usb: dwc2: Add clock gating exiting flow by system resume Artur Petrosyan
2021-04-13  7:17 ` [PATCH 12/12] usb: dwc2: Add exit clock gating before removing driver Artur Petrosyan
2021-04-13  7:36 ` [PATCH v2 01/12] usb: dwc2: Add device clock gating support functions Artur Petrosyan
2021-04-13  7:36 ` [PATCH v2 02/12] usb: dwc2: Add host " Artur Petrosyan
2021-04-13  7:36 ` [PATCH v2 03/12] usb: dwc2: Allow entering clock gating from USB_SUSPEND interrupt Artur Petrosyan
2021-04-13  7:36 ` Artur Petrosyan [this message]
2021-04-13  7:36 ` [PATCH v2 05/12] usb: dwc2: Add exit clock gating from session request interrupt Artur Petrosyan
2021-04-13  7:36 ` [PATCH v2 06/12] usb: dwc2: Add exit clock gating when port reset is asserted Artur Petrosyan
2021-04-13  7:36 ` [PATCH v2 07/12] usb: dwc2: Update enter clock gating when port is suspended Artur Petrosyan
2021-04-13  7:37 ` [PATCH v2 08/12] usb: dwc2: Update exit clock gating when port is resumed Artur Petrosyan
2021-04-13  7:37 ` [PATCH v2 09/12] usb: dwc2: Allow exit clock gating in urb enqueue Artur Petrosyan
2021-04-13  7:37 ` [PATCH v2 10/12] usb: dwc2: Add clock gating entering flow by system suspend Artur Petrosyan
2021-04-13  9:29   ` Sergei Shtylyov
2021-04-13  7:37 ` [PATCH v2 11/12] usb: dwc2: Add clock gating exiting flow by system resume Artur Petrosyan
2021-04-13  9:30   ` Sergei Shtylyov
2021-04-13  7:37 ` [PATCH v2 12/12] usb: dwc2: Add exit clock gating before removing driver Artur Petrosyan
     [not found] ` <20210413073600.57846A0094@mailhost.synopsys.com>
2021-04-13  8:03   ` [PATCH v2 00/12] usb: dwc2: Add clock gating support Artur Petrosyan
2021-04-13 10:26     ` Greg Kroah-Hartman

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