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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3074db85e10sm3362286eec.7.2026.06.03.14.46.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 03 Jun 2026 14:46:55 -0700 (PDT) Message-ID: <21facbaa-c001-4e82-954d-f2f6838d41b3@oss.qualcomm.com> Date: Wed, 3 Jun 2026 14:46:54 -0700 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 1/2] dt-bindings: phy: qcom: Add CSI2 C-PHY/DPHY schema To: Bryan O'Donoghue , Vladimir Zapolskiy , Bryan O'Donoghue , Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260523-x1e-csi2-phy-v8-0-a85668459521@linaro.org> <20260523-x1e-csi2-phy-v8-1-a85668459521@linaro.org> <478df3ed-d4ef-43aa-bb84-e2075798542b@kernel.org> <514cf213-5778-45e1-8d70-d3fe27991fcc@oss.qualcomm.com> <7JNJ4dUNz4ennJ5dkzhfLSuVo72JpfZAbprICPRqlRYnSzVDJw6x3h-1nESd_PK-3us9f1V3qOiLiywsTqP8vQ==@protonmail.internalid> <29e8491f-20e8-4082-8943-66bee7e3af1d@kernel.org> Content-Language: en-US From: Vijay Kumar Tumati In-Reply-To: <29e8491f-20e8-4082-8943-66bee7e3af1d@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: g3-XT0uMwDA2ywpRnAoz5caOM2MChDYB X-Authority-Analysis: v=2.4 cv=XK0AjwhE c=1 sm=1 tr=0 ts=6a20a0d0 cx=c_pps a=wEP8DlPgTf/vqF+yE6f9lg==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=R4he3g2KxIACXk2nk8MA:9 a=QEXdDO2ut3YA:10 a=bBxd6f-gb0O0v-kibOvt:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjAzMDIxMiBTYWx0ZWRfX/wRserkeUF0x XnmG4bSWhyXBFG1Nz0qCzT7yw0lJ3uscsJJfXs08TTcZfjANdXde4qEVAZ0Ss/WTiIbkOE9U9O3 aEnrr3c1eRBEnsB1D6x9s69ewyBWSclb/QAEVqVLtr5MNvQd0Gx96F2+gKtpyYyC2E1Epq7twZ+ iWo4l45JLH6hQk69Ec23X2XbZ8AdtzJKjQSy9v1/4wN/3W5YE5tdj1iqq0Dh8CdDCrXo/BNuHMg lTX/bS65Ha6IjalWPcqsXT9ljht5jm8Yi7iP/CXGrCde34+TMC8Qx16F1GxI71KhR0o7fbw6IG9 6rRUnurwYzp09wYxNvX7zP0uYGJ8DTFHDdSM0emBrUbhzaeI/Thqpg/+DjekoS7FHCuFOiksvxQ RWrgDGYbii3G5iNOSBcOivJ/1nINesCxUAVT16dviX8aj3X9ad7+VCwQG2EE8V0AFN4m2HOkTUy MyLGCe1JKlLseydis4A== X-Proofpoint-ORIG-GUID: g3-XT0uMwDA2ywpRnAoz5caOM2MChDYB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-03_06,2026-05-28_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 phishscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606030212 On 6/3/2026 2:18 PM, Bryan O'Donoghue wrote: > On 03/06/2026 21:51, Vladimir Zapolskiy wrote: >>> Actually, one more thing, Why isn't TITAN TOP GDSC here?>>>> + >> If CSIPHYs are true subdevices under the umbrella CAMSS device and well >> described as subnodes, then likely none of power domains are needed to be >> repeatedly described in the children device nodes, since this information >> can be obtained from the parent device by the driver. >> >> Technically 'power-domains' property can be safely removed, I believe. > > The policy is to describe the power-domain dependency fully since DT > describes hardware not software architecture. > > Also for a very practical reason a sub-devices can probe/run > asynchronously of the parent device being active so in fact we do need > to describe the PDs fully. This makes me think. When the PHY devices are made the sub nodes of the top camss node eventually, we can discuss for somethings to be avoided in each child, which we can come to later but for now, you need to add the top AHB clock as well in the PHY node, Bryan.> > --- > bod Thanks, Vijay.