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Fri, 06 Nov 2026 00:27:41 -0800 (PST) Received: from hu-taparana-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3b0d7c42a72sm2433951a91.3.2026.11.06.00.27.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 00:27:41 -0800 (PST) From: Tapas Rana To: Vinod Koul , Thinh Nguyen , Greg Kroah-Hartman Cc: Neil Armstrong , Manivannan Sadhasivam , Dmitry Baryshkov , Abel Vesa , Konrad Dybcio , Wesley Cheng , Esteban Urrutia , Loic Poulain , Krishna Kurapati , Ronak Raheja , Faisal Hassan , Krishna Chaitanya Chundru , prashanth.k@oss.qualcomm.com, linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Tapas Rana Subject: [PATCH 3/3] usb: dwc3: qcom: pass live SS-link state into PHY at suspend entry Date: Fri, 6 Nov 2026 13:57:16 +0530 Message-ID: <20261106082716.128968-4-tapas.rana@oss.qualcomm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261106082716.128968-1-tapas.rana@oss.qualcomm.com> References: <20261106082716.128968-1-tapas.rana@oss.qualcomm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMTA2MDAzMyBTYWx0ZWRfXzsmDQrcisc4k bhMHHSrQXxBDgSVFdr/PGjVMEuaYMLSNyfFnQs+BOqpd9lqyfcmaey3gldVY8en9loqTGeNkmRQ W8JPRpR3j9BDFGU3YZdyOjzhfEU4w+o= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTA2MDAzMyBTYWx0ZWRfX4aLIHbOQGHQ0 bo1RNZ9l5Icxe1tcqausCvapgKO667/hEnitWF8U1nXRqDVJ4AXmMUQuuVX9Y1gRy77JqNXNF/F SS8WuPeQKtl1aS3s/KJr52CGIXVEauSEx9g0VbEI4BLgz29qUnSi1ssNUTc+A3nydrA4+0w2YWi v8nSTF4PoPOdPw5HQGRxmVBIIE5m7hVyb0zKbVZx7hqqjIlO2DiuU4ivKJULa+UCsjmKP3vMmPo VQdn4M2tL3rrYLaaMCGxagb/NHyDtK07JFADi2RZ1l1b+ZrTLdSvbeM6/27IpGV/8kV8hJoJoKU +EvWdyhUY2UXu7yIU/QY+W81pJNu5tQKfNtakkG9Xom5ZZr80J8c8rTCfIXLRrKbLshRJOtNOGE a37qq3i1hMbA8aAhlkQKjkcOF9pwMIV+7THiPqhjXcGir/Q+zs6uQLk9eSJX2f397XfYpnlyBWf u5g18PAwKh4qUoUbubA== X-Proofpoint-ORIG-GUID: dkBEO0FfEAqhvy5ZOjV6fiAL0FkM-6My X-Authority-Analysis: v=2.4 cv=f6Pdl+yM c=1 sm=1 tr=0 ts=6aed8f7f cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=zJRp6_cAMcgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=qBW0Ez0WUtIADFg3DaYA:9 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-GUID: dkBEO0FfEAqhvy5ZOjV6fiAL0FkM-6My X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-06_02,2026-11-04_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 bulkscore=0 phishscore=0 adultscore=0 spamscore=0 clxscore=1015 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611060033 dwc3_qcom_suspend() puts each host port into autonomous/wake mode without ever telling the PHY whether a SuperSpeed device is currently attached. qmp_combo_enable_autonomous_mode(), made SS-aware in the previous patch, therefore has no live signal to act on and always sees QCOM_USB_SS_UNKNOWN, falling back to the legacy receiver-detect mask regardless of actual link state. Add dwc3_qcom_read_ss_state() to check each port's USB3 roothub for an attached child device running at SuperSpeed or above, and pass the result as the submode argument of phy_set_mode_ext() so the PHY can select LFPS detection when appropriate. Signed-off-by: Tapas Rana --- drivers/usb/dwc3/dwc3-qcom.c | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index ac68b4218b56..d4ba095e47eb 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "core.h" #include "glue.h" @@ -66,6 +67,7 @@ struct dwc3_qcom_port { int dm_hs_phy_irq; int ss_phy_irq; enum usb_device_speed usb2_speed; + enum qcom_usb_ss_state ss_state; }; struct dwc3_qcom { @@ -251,6 +253,34 @@ static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom, i return udev->speed; } +static enum qcom_usb_ss_state dwc3_qcom_read_ss_state(struct dwc3_qcom *qcom, int port_index) +{ + struct usb_device *udev; + struct usb_hcd __maybe_unused *hcd, *usb3_hcd; + struct dwc3 *dwc = &qcom->dwc; + + /* + * FIXME: Fix this layering violation. + */ + hcd = platform_get_drvdata(dwc->xhci); + if (!hcd) + return QCOM_USB_SS_ABSENT; + +#ifdef CONFIG_USB + usb3_hcd = hcd->shared_hcd ? hcd->shared_hcd : hcd; + if (!usb3_hcd->self.root_hub) + return QCOM_USB_SS_ABSENT; + + udev = usb_hub_find_child(usb3_hcd->self.root_hub, port_index + 1); +#else + udev = NULL; +#endif + if (!udev) + return QCOM_USB_SS_ABSENT; + + return udev->speed >= USB_SPEED_SUPER ? QCOM_USB_SS_PRESENT : QCOM_USB_SS_ABSENT; +} + static void dwc3_qcom_enable_wakeup_irq(int irq, unsigned int polarity) { if (!irq) @@ -359,8 +389,12 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup) * freezable workqueue. */ if (dwc3_qcom_is_host(qcom) && wakeup) { - for (i = 0; i < qcom->num_ports; i++) + for (i = 0; i < qcom->num_ports; i++) { qcom->ports[i].usb2_speed = dwc3_qcom_read_usb2_speed(qcom, i); + qcom->ports[i].ss_state = dwc3_qcom_read_ss_state(qcom, i); + phy_set_mode_ext(qcom->dwc.usb3_generic_phy[i], PHY_MODE_USB_HOST, + qcom->ports[i].ss_state); + } dwc3_qcom_enable_interrupts(qcom); } -- 2.43.0