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Tue, 25 Aug 2026 03:45:28 -0700 (PDT) X-Received: by 2002:ac8:7e8a:0:b0:51b:8543:cbbd with SMTP id d75a77b69052e-52df56452famr246031211cf.1.1787654727942; Tue, 25 Aug 2026 03:45:27 -0700 (PDT) Received: from [192.168.120.193] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c249685c573sm2189794666b.51.2026.08.25.03.45.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Aug 2026 03:45:27 -0700 (PDT) Message-ID: <3c643da8-b817-49a6-ba86-ced9f9e99579@oss.qualcomm.com> Date: Tue, 25 Aug 2026 12:45:25 +0200 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 v6 8/9] arm64: dts: qcom: kodiak: Describe EUD UTMI path using child node To: Elson Serrao , Bjorn Andersson , Dmitry Baryshkov , Greg Kroah-Hartman , Konrad Dybcio , Krzysztof Kozlowski , Peter Chen , Rob Herring , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260811213610.2956147-1-elson.serrao@oss.qualcomm.com> <20260811213610.2956147-9-elson.serrao@oss.qualcomm.com> <906db71e-8f2d-4ab8-856d-915ff9dfef77@oss.qualcomm.com> <9a556733-79db-4f69-a149-b678c23cab7d@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <9a556733-79db-4f69-a149-b678c23cab7d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: texF4PXk-U8DdOvTFMDEY8QBQ02p6Rnd X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI1MDA5MCBTYWx0ZWRfX0svK9riqbvnQ GiuHevOrtBI4aT40VLZLnYEBBD2HjiHKnI59c0gI3fl76pDQI/wQsudS5uoSX9/12MQ8w3sgnKy MKFC9ScMytH5KAonZZY6V6MbLihB1qwVWJ8/95r7xmK9fmhGVEtI9n0/OkHRff18M7x8PLGeG8Q aZANa2dEetpTBqFTmzLsixbWNSy0dSUUx5ramzlQe7dD4dN3R043FuqMhPEXcg1zRB3eWmRrt+K KHi/W8zkZbItUSMb7eglZvb4xJ5gxWPV8P3mBBPA5ezpB5ZFywEW9vGgjsI+BSREt5aX9RaybZX JWBPmsCVgg4bPWvHKAkZBRdbxwpB/2iFq27S5Peh+OywvbsqvTTYb4t3AyTrEaoEcvLbxhw/6A5 xjNnL8wnyoCyhUpbApiaH/9jx/XNaq4dnZ75fk2gfLhevGpO3+3Bh9/0YBoD+7UgWRd8K3UfBQr QA2+6pjRSFXij0FRjew== X-Proofpoint-Spam-Info: AW1haW4tMjYwODI1MDA5MCBTYWx0ZWRfX1n8ZdkXNkBDJ AJ9+94xn5tC54xxTCqkQIagmvSlKM7UwDaGFu5JwbV4jvxiyysZWvrtqfucXszid45/zROmJDaQ E+WdbdTpIKZL8f+hr6Shb3t3pw/3Pxk= X-Authority-Analysis: v=2.4 cv=L7ItheT8 c=1 sm=1 tr=0 ts=6a8d7249 cx=c_pps a=hnmNkyzTK/kJ09Xio7VxxA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=WoG-0apm311xA57AWd0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=PEH46H7Ffwr30OY-TuGO:22 X-Proofpoint-ORIG-GUID: texF4PXk-U8DdOvTFMDEY8QBQ02p6Rnd 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=2026-08-25_02,2026-08-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 impostorscore=0 spamscore=0 clxscore=1015 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608250090 On 8/25/26 5:28 AM, Elson Serrao wrote: > > > On 8/24/2026 6:48 AM, Konrad Dybcio wrote: >> On 8/11/26 11:36 PM, Elson Serrao wrote: >>> The existing EUD description uses a legacy single-path representation >>> that assumes uniform UTMI routing. This was sufficient for minimal >>> configurations where the USB port operated only in device mode and role >>> switching was not considered. >> >> [...] >> >>> + ports { >>> + #address-cells = <1>; >>> + #size-cells = <0>; >>> + >>> + port@0 { >>> + reg = <0>; >>> + eud_usb: endpoint { >>> + remote-endpoint = <&usb_1_dwc3_hs>; >> >> This change alone will trip "connection is not bi-directional" warnings, >> as board DTs override that endpoint already >> > Patch 8 on its own would indeed trigger the "connection is not > bi-directional" warnings. Patch 9 updates the corresponding > board-level endpoint overrides and resolves those warnings. >   > Would you prefer that I squash patch 9 into patch 8 so that the > graph remains valid within a single patch? This is a pre-requisite - each patch must build and function on its own, as during a git bisect we may land on it > Alternatively, we could > move the endpoint assignment into the board DTS. However, since the > EUD-to-controller mapping is on-SoC rather than board-specific, keeping > it in the SoC DTSI appears to be the more appropriate placement. Yes, that's desirable, it's just that the changes must be made in lockstep Konrad