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Mon, 23 Feb 2026 22:33:58 -0800 (PST) X-Received: by 2002:a17:90b:2cc5:b0:356:35a5:4a64 with SMTP id 98e67ed59e1d1-358ae7c5003mr9638923a91.4.1771914838099; Mon, 23 Feb 2026 22:33:58 -0800 (PST) Received: from [10.218.18.194] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-358df5d089asm488789a91.14.2026.02.23.22.33.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Feb 2026 22:33:57 -0800 (PST) Message-ID: <40eb66b5-7f3d-4df5-b6db-719168d85b72@oss.qualcomm.com> Date: Tue, 24 Feb 2026 12:03:51 +0530 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 v3 0/2] arm64: dts: qcom: qcs6490-rb3gen2-industrial-mezzanine: Add TC9563 PCIe switch nodes To: Konrad Dybcio , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Manivannan Sadhasivam Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Baryshkov References: <20260212-industrial-mezzanine-pcie-v3-0-1e152937a76a@oss.qualcomm.com> <3c06c3cd-cc10-4e2c-9001-9e0a4174d489@oss.qualcomm.com> Content-Language: en-US From: Sushrut Shree Trivedi In-Reply-To: <3c06c3cd-cc10-4e2c-9001-9e0a4174d489@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: cDiTAnsI2rct19msO0lTUBH8RYFB8mvN X-Proofpoint-ORIG-GUID: cDiTAnsI2rct19msO0lTUBH8RYFB8mvN X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjI0MDA1NCBTYWx0ZWRfX2ovdxe6CZySC lXvWqZduEusD/RbvtIFF00Fm6bpvvuIsabvqNpRHw59S+Ii5aNN3M0tqM3R2QrUoF22AOEU8WXW /z4QsWQhtMHfTq6kWdZco5MLSczZoxktna8734d9nAraRlEkcir0xPx++ic9k4mkHROZSbXNuxk 7d4icW6h3oDDlUIXiTLDoe2g49wdm9ep/XrtYXk7MTn4493Ihb2lit6PynjTli0DLmePA0dFJ8j 0ZR67khszQtJpBvivot3tM2E6F72fr6W0ucinae8pKQHi2q/cZGVMI84kspgmOZY7si3RH6lTks 4dUkZ4Ae+QzD65b8ZICc9UJzv0FnePR0zvBe5D+FwrxcLiA+oxclYK3/XatHI8StTt502azkUIz c6U/fVw+O2FX9k72kIlT94PcyNYNyPxVknM7S5Sf4zCPtkyaXmoceklWVbb1BrstPMNHwonNrRH a3RBtLI7vV5JSTM2ssw== X-Authority-Analysis: v=2.4 cv=J8enLQnS c=1 sm=1 tr=0 ts=699d4657 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=-kCUtytw42OpCi1CPN4A:9 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-23_06,2026-02-23_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 suspectscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 impostorscore=0 bulkscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2602240054 On 2/12/2026 5:18 PM, Konrad Dybcio wrote: > On 2/12/26 11:44 AM, Sushrut Shree Trivedi wrote: >> Add nodes for the two additional TC9563 PCIe switches present on the >> QCOM RB3Gen2 Industrial Mezzanine platform. >> >> One of the TC9563 is connected directly to the PCIe0 root-port while >> the second TC9563 switch is connected in cascade fashion to another >> already available TC9563 switch on PCIe1 via the former's downstream >> port (DSP). The final PCIe hierarchy on the Industrial Mezz platform > ^ +Mani is that PCIe terminology, or is that a Toshiba-ism? The PCIe Spec actually uses the DSP terminology under r6.2 sec 7.9.29: Streamlined Virtual Channel Extended Capability (SVC) "If the SVC Extended Capability structure is implemented in a USP containing one or more Switch USP Functions, it must be implemented in all associated Switch DSP Functions" Sushrut > > Konrad