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Mon, 10 Aug 2026 12:23:33 -0700 (PDT) X-Received: by 2002:a17:903:3904:b0:2d1:1a28:10d with SMTP id d9443c01a7336-2d3004508bamr47137255ad.18.1786389813150; Mon, 10 Aug 2026 12:23:33 -0700 (PDT) Received: from [192.168.1.132] ([70.95.199.79]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-315beb88413sm79472110eec.18.2026.08.10.12.23.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Aug 2026 12:23:32 -0700 (PDT) Message-ID: Date: Mon, 10 Aug 2026 12:23:31 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/9] dt-bindings: soc: qcom: eud: Add per-path child nodes for UTMI routing To: Rob Herring , Krzysztof Kozlowski Cc: Bjorn Andersson , Dmitry Baryshkov , Greg Kroah-Hartman , Konrad Dybcio , Krzysztof Kozlowski , Peter Chen , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260803031534.2942628-1-elson.serrao@oss.qualcomm.com> <20260803031534.2942628-2-elson.serrao@oss.qualcomm.com> <20260807-shrewd-white-mayfly-a8bfea@quoll> <20260807135239.GA48030-robh@kernel.org> Content-Language: en-US From: Elson Serrao In-Reply-To: <20260807135239.GA48030-robh@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: uuOajajxMcCVP_il6moXSZSHm-ffFi8g X-Proofpoint-Spam-Info: AW1haW4tMjYwODEwMDE2NSBTYWx0ZWRfX+zBk3GTAHsuN SzLaRC6XH6QjTSWvC4XpGqTZpfqkETdNo5y5AHCIO53OLqZ4MxuYkiB+Xpmo2CctNO3yjvSVU0d P6eqjzYenTpRn7bqQy9Fxmy365mOUGc= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEwMDE2NSBTYWx0ZWRfX0AQaL8EzdOLp 3Iw0THRrNDG2LfM4OkDdVpO2V63Leqo+kcGInIppUshaZBOKocp6v9+RFVV26+i7m0AEF+cOz30 hpaFvHpT6oYkHifRBrJuEjnTp5Kb4wxbvU+ssblWmT73BJPWaP8MESim4EOzuTU0kjHf5rn3pGu PSQARUUTVqFIMR59TUl3hNfo5VTF/pMWnJwWK+4Q/8XRpG2v+yacnQ5Zj4RakJlEX+YlIkeinZw zWkBndIXsaspw3FvUTcMOTiRHkJGeeBT8KoFkSkYHWG+mWwwEc0hM26qvZnDuWxQRG92Gaz/+xq kdYdkYoI/tmJx45z+mZ4vK8yz/0dx+golRF2jGPCg8UcnnFZAZfGNVoeUPP2NxTLwdUPKStlrO3 57XGX+FxGS47Pm47K0WCf9asomvVaokVYfXoAyTKx2XA++aMWyU4MOGMLolCZoiCFlBs7uv6pGQ aqUoZuOy64Gxu0Ex1qg== X-Proofpoint-GUID: uuOajajxMcCVP_il6moXSZSHm-ffFi8g X-Authority-Analysis: v=2.4 cv=Zd4t8MVA c=1 sm=1 tr=0 ts=6a7a2536 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=uHxescsG3rBdxcXwcPaeSg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=3weD0my5navHwqW7PqcA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=GvdueXVYPmCkWapjIL-Q:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-10_05,2026-08-10_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 malwarescore=0 suspectscore=0 adultscore=0 priorityscore=1501 spamscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608100165 On 8/7/2026 6:52 AM, Rob Herring wrote: > On Fri, Aug 07, 2026 at 09:20:26AM +0200, Krzysztof Kozlowski wrote: >> On Sun, Aug 02, 2026 at 08:15:26PM -0700, Elson Serrao wrote: >>> The Qualcomm Embedded USB Debugger (EUD) can intercept one or two >>> High-Speed UTMI paths depending on the SoC. For example, SC7280 supports >>> EUD on the primary UTMI path only, while SM8350 supports EUD on both >>> primary and secondary UTMI paths. >>> >>> Each UTMI path connects an independent USB controller/connector pair and >>> forms its own role-switch domain. EUD routes traffic based on USB role. >>> In device role the debug hub is inserted, while in host role it is >>> bypassed. >>> >>> The existing binding models EUD using a flattened ports representation. >>> While sufficient for fixed device-role configurations, it cannot naturally >>> associate a controller, connector, and role switch with a specific >>> EUD-routable path. This is problematic for role-switch capable ports and >>> becomes more pronounced on SoCs with multiple paths. In such cases, each >>> path forms an independent role-switch domain and requires per-path role >>> awareness. >>> >>> Model each UTMI path as a separate child node with its own OF graph. Add >>> an SM8350 compatible for dual-path EUD topologies while retaining the >>> legacy ports representation for backward compatibility. >>> >>> Signed-off-by: Elson Serrao >>> --- >>> .../bindings/soc/qcom/qcom,eud.yaml | 128 +++++++++++++++++- >>> 1 file changed, 127 insertions(+), 1 deletion(-) >> >> Reviewed-by: Krzysztof Kozlowski > > sashiko correctly points out the oneOf logic is flawed. > Thanks Rob and Krzysztof for the review.   I'll address this in v6 by making the two representations in oneOF section mutually exclusive. Thanks Elson