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Mon, 30 Jun 2025 05:30:20 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGkaFNPxqWvP2slDuEpYtj3r5EnhD15Tr2DIQp6ChiI+aHrargB99nmYkj5G7fm4yQY9LxhLg== X-Received: by 2002:a05:6a00:1988:b0:748:f365:bedd with SMTP id d2e1a72fcca58-74af6f4d4bcmr17197201b3a.17.1751286619834; Mon, 30 Jun 2025 05:30:19 -0700 (PDT) Received: from [10.92.200.128] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-74af55c6a3asm8487704b3a.118.2025.06.30.05.30.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 30 Jun 2025 05:30:19 -0700 (PDT) Message-ID: <4bae822e-e7bd-461f-99cc-866771c0b954@oss.qualcomm.com> Date: Mon, 30 Jun 2025 18:00:12 +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 v4 0/2] PCI: qcom: Move PERST# GPIO & phy retrieval from controller to PCIe bridge node To: Manivannan Sadhasivam Cc: Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , cros-qcom-dts-watchers@chromium.org, =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, quic_vbadigan@quicinc.com, quic_mrana@quicinc.com References: <20250605-perst-v4-0-efe8a0905c27@oss.qualcomm.com> Content-Language: en-US From: Krishna Chaitanya Chundru In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: Q4Mz73Wq7u7uc3D6QA-UEVyWbeSW3KzA X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjMwMDEwMiBTYWx0ZWRfX4oExg6Mc6Iep eiME5phijGI10CH8iy0rrGgPhtODlQflAowVAu1AXBastqV/4cA4bskMlVykqd4/h/F08hMfU5r YnV34DXV+7ISTguRmvRuW1jboyCxLyWdY1UX3wTg6uUgVS1TMEjXgfiJDXLl77cJZlljI09Xfge 49aeBiPrQg5s3kmWjvqWXAl44TnWPLxGDor3l6PZ3Ox9ZeLj9jvkM1IJqgYS2mGRItMBiA8QHER Yrz3mCPoWN9mJn2P5aSgW5AE5ayW1oUSPT+Me6u4cIL4mdaow/lW+QrzQI/hsJ3Lnhi5CEeoe+7 vL08cNT5jWd7AlSc1F/uMVa8ic3KFOpUYsKyh4nNJMn+YuqEO61IkzEDDKNU4W8IIG4JAjNtSat X13FzS47zPQYdp6+g7HGaeSQBmx0qKF2uYImk9wdpkXv9vvDVFfQb7th6nCUu7u07TXxmKLL X-Authority-Analysis: v=2.4 cv=L9sdQ/T8 c=1 sm=1 tr=0 ts=6862835e cx=c_pps a=WW5sKcV1LcKqjgzy2JUPuA==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=6IFa9wvqVegA:10 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=qGq9QQooCmLM_m6diiQA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=OpyuDcXvxspvyRM73sMx:22 X-Proofpoint-GUID: Q4Mz73Wq7u7uc3D6QA-UEVyWbeSW3KzA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-06-30_03,2025-06-27_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 phishscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506300102 On 6/23/2025 4:37 PM, Manivannan Sadhasivam wrote: > On Thu, Jun 05, 2025 at 02:00:36PM +0530, Krishna Chaitanya Chundru wrote: >> The main intention of this series is to move wake# to the root port node. >> After this series we will come up with a patch which registers for wake IRQ >> from the pcieport driver. The wake IRQ is needed for the endpoint to wakeup >> the host from D3cold. The driver change for wake IRQ is posted here[1]. >> >> There are many places we agreed to move the wake and perst gpio's >> and phy etc to the pcie root port node instead of bridge node[2] as the >> these properties are root port specific and does not belongs to >> bridge node. >> >> So move the phy, phy-names, wake-gpio's in the root port. >> There is already reset-gpio defined for PERST# in pci-bus-common.yaml, >> start using that property instead of perst-gpio. >> >> For backward compatibility, don't remove any existing properties in the >> bridge node. >> >> There are some other properties like num-lanes, max-link-speed which >> needs to be moved to the root port nodes, but in this series we are >> excluding them for now as this requires more changes in dwc layer and >> can complicate the things. >> >> Once this series gets merged all other platforms also will be updated >> to use this new way. >> >> Note:- The driver change needs to be merged first before dts changes. >> Krzysztof Wilczyński or Mani can you provide the immutable branch with >> these PCIe changes. >> > > You've dropped the DTS changes in this revision. So the above comment is stale. > >> [1] https://lore.kernel.org/all/20250401-wake_irq_support-v1-0-d2e22f4a0efd@oss.qualcomm.com/ >> [2] https://lore.kernel.org/linux-pci/20241211192014.GA3302752@bhelgaas/ >> > > I don't have a device to test this series right now. So could you please test > this series with the legacy binding and make sure it is not breaking? > > Once you confirm, I'll merge this series. > I have verified with legacy binding with this change and it is working fine. - Krishna Chaitanya. > - Mani > >> Signed-off-by: Krishna Chaitanya Chundru >> --- >> Changes in v4: >> - Removed dts patch as Mani suggested to merge driver and dt-binding >> patch in this release and have dts changes in the next release. >> - Remove wake property from as this will be addressed in >> pci-bus-common.yaml (Mani) >> - Did couple of nits in the comments, function names code etc (Mani). >> - Link to v3: https://lore.kernel.org/r/20250419-perst-v3-0-1afec3c4ea62@oss.qualcomm.com >> >> Changes in v3: >> - Make old properties as deprecated, update commit message (Dmitry) >> - Add helper functions wherever both multiport and legacy methods are used. (Mani) >> - Link to v2: https://lore.kernel.org/r/20250414-perst-v2-0-89247746d755@oss.qualcomm.com >> >> Changes in v2: >> - Remove phy-names property and change the driver, dtsi accordingly (Rob) >> - Link to v1: https://lore.kernel.org/r/20250322-perst-v1-0-e5e4da74a204@oss.qualcomm.com >> >> --- >> Krishna Chaitanya Chundru (2): >> dt-bindings: PCI: qcom: Move phy & reset gpio's to root port >> PCI: qcom: Add support for multi-root port >> >> .../devicetree/bindings/pci/qcom,pcie-common.yaml | 32 +++- >> .../devicetree/bindings/pci/qcom,pcie-sc7280.yaml | 16 +- >> drivers/pci/controller/dwc/pcie-qcom.c | 177 +++++++++++++++++---- >> 3 files changed, 192 insertions(+), 33 deletions(-) >> --- >> base-commit: ec7714e4947909190ffb3041a03311a975350fe0 >> change-id: 20250101-perst-cb885b5a6129 >> >> Best regards, >> -- >> krishnachaitanya-linux >> >