linux-kernel - [PATCH 0/2] Add firmware-managed PCIe Endpoint support for SA8255P

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Message-Id: <20251203-firmware_managed_ep-v1-0-295977600fa5@oss.qualcomm.com>
Date: Wed, 03 Dec 2025 18:56:46 +0530
From: Mrinmay Sarkar <mrinmay.sarkar@....qualcomm.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kwilczynski@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@....qualcomm.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>,
        Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>,
        quic_vbadigan@...cinc.com, quic_shazhuss@...cinc.com,
        konrad.dybcio@....qualcomm.com,
        Mrinmay sarkar <mrinmay.sarkar@....qualcomm.com>,
        Rama Krishna <quic_ramkri@...cinc.com>,
        Ayiluri Naga Rashmi <quic_nayiluri@...cinc.com>,
        Nitesh Gupta <quic_nitegupt@...cinc.com>
Subject: [PATCH 0/2] Add firmware-managed PCIe Endpoint support for SA8255P

This patch series introduces support for Qualcomm SA8255P platform
where PCIe Endpoint resources are managed by firmware instead of
Linux driver. So the Linux driver should avoid redundant resource
management and relies on runtime PM calls to inform firmware for
resource management.

And documents the new compatible string "qcom,sa8255p-pcie-ep" for
SA8255P platforms in the device tree bindings.

Tested on Qualcomm SA8255P platform.

Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@....qualcomm.com>
---
Mrinmay Sarkar (2):
      dt-bindings: PCI: qcom,pcie-ep-sa8255p: Document firmware managed PCIe endpoint
      PCI: qcom-ep: Add support for firmware-managed PCIe Endpoint

 .../bindings/pci/qcom,pcie-ep-sa8255p.yaml         | 114 +++++++++++++++++++++
 drivers/pci/controller/dwc/pcie-qcom-ep.c          |  80 ++++++++++++---
 2 files changed, 178 insertions(+), 16 deletions(-)
---
base-commit: b2c27842ba853508b0da00187a7508eb3a96c8f7
change-id: 20251203-firmware_managed_ep-37f1efb69b15

Best regards,
-- 
Mrinmay Sarkar <mrinmay.sarkar@....qualcomm.com>