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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d74885b5a4sm3036494a34.23.2026.03.09.13.33.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Mar 2026 13:33:48 -0700 (PDT) From: Elson Serrao To: Greg Kroah-Hartman , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Souradeep Chowdhury Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC v3 08/10] usb: dwc3: qcom: notify EUD driver of role changes Date: Mon, 9 Mar 2026 13:33:35 -0700 Message-Id: <20260309203337.803986-9-elson.serrao@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260309203337.803986-1-elson.serrao@oss.qualcomm.com> References: <20260309203337.803986-1-elson.serrao@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: 4TwAxleJueJo0JI_AMCvN5vD8Z3zyhb4 X-Proofpoint-ORIG-GUID: 4TwAxleJueJo0JI_AMCvN5vD8Z3zyhb4 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA5MDE4MiBTYWx0ZWRfX0PkG5QVTQAsw qQtUs4nEj6Ai/sIb+f5cGKdGl5gF7xCK5xt5RYKLbOd2CnS1uuadq9f+ZGCvep103BLQ1XJDW0l IBbicBcLFkwCshmgRI9294eCs9AWi9FfKtJ0hbw+tbBqcVNTtJIWusTyxgnoa7IinfWXCgmMYRO voij0VN1z1ISmm9b3KGWqE2fh0qbh3vDuF5vSfxriJZhFTTNGiT8OK83CMwSUHhV8v/HVFtaD6Q 46h881nCA3OAIxuTmis0RWgFljoqO1Yt4GbQ1KeLzlwl5Q++tarA677R090XO02NP+PJpJwbgTP 11tSXUtoGoSEsmWGtXKStQnzLDzG8DFZt/E6IjQflz85zHwjAKe4PhPgBGYZHV+rAFG2Hje6h9Y SAFXm8euk8sjSmYMbTI38Fdu2QaqLti+fubIiUILNb3BXHlpGZzD2yJuEVpdiltxvUTu3sCeUj1 +ieBafnNKITVmItTC8w== X-Authority-Analysis: v=2.4 cv=Cuays34D c=1 sm=1 tr=0 ts=69af2eae cx=c_pps a=z9lCQkyTxNhZyzAvolXo/A==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=D7RZ5MMOI3w-WYzWcLoA:9 a=EyFUmsFV_t8cxB2kMr4A:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-09_05,2026-03-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 spamscore=0 adultscore=0 priorityscore=1501 phishscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603090182 Content-Type: text/plain; charset="utf-8" The EUD driver needs USB role information to control its operation as it is incompatible with host mode. Notify the EUD driver when role changes occur so it can manage its state accordingly. Signed-off-by: Elson Serrao --- drivers/usb/dwc3/Kconfig | 1 + drivers/usb/dwc3/dwc3-qcom.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 240b15bc52cb..1a2d7c883b50 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -132,6 +132,7 @@ config USB_DWC3_QCOM depends on ARCH_QCOM || COMPILE_TEST depends on EXTCON || !EXTCON depends on OF + depends on USB_QCOM_EUD || !USB_QCOM_EUD default USB_DWC3 help Some Qualcomm SoCs use DesignWare Core IP for USB2/3 diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 9ac75547820d..b51fd97521df 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -19,6 +20,7 @@ #include #include #include +#include #include "core.h" #include "glue.h" =20 @@ -561,6 +563,7 @@ static int dwc3_qcom_setup_irq(struct dwc3_qcom *qcom, = struct platform_device *p static void dwc3_qcom_set_role_notifier(struct dwc3 *dwc, enum usb_role ne= xt_role) { struct dwc3_qcom *qcom =3D to_dwc3_qcom(dwc); + struct device_node *eud_node; =20 if (qcom->current_role =3D=3D next_role) return; @@ -570,6 +573,13 @@ static void dwc3_qcom_set_role_notifier(struct dwc3 *d= wc, enum usb_role next_rol return; } =20 + /* Notify EUD of role change */ + eud_node =3D of_graph_get_remote_node(qcom->dev->of_node, 0, -1); + if (eud_node) { + qcom_eud_usb_role_notify(eud_node, dwc->usb2_generic_phy[0], next_role); + of_node_put(eud_node); + } + if (qcom->current_role =3D=3D USB_ROLE_DEVICE) dwc3_qcom_vbus_override_enable(qcom, false); else if (qcom->current_role !=3D USB_ROLE_DEVICE) --=20 2.34.1