linux-kernel - [PATCH 0/2] PCI: dwc: Fix ECAM enablement when used with vendor drivers

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Message-Id: <20251017-ecam_fix-v1-0-f6faa3d0edf3@oss.qualcomm.com>
Date: Fri, 17 Oct 2025 17:10:52 +0530
From: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
To: Jingoo Han <jingoohan1@...il.com>, Manivannan Sadhasivam <mani@...nel.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kwilczynski@...nel.org>,
        Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>,
        Ron Economos <re@...z.net>
Subject: [PATCH 0/2] PCI: dwc: Fix ECAM enablement when used with vendor
 drivers

This series addresses issues with ECAM enablement in the DesignWare PCIe
host controller when used with vendor drivers that rely on the DBI base
for internal accesses.

The first patch fixes the ECAM logic by introducing a custom PCI ops
implementation that avoids overwriting the DBI base, ensuring compatibility
with vendor drivers that expect a stable DBI address.

The second patch reverts Qualcomm-specific ECAM preparation logic that
is no longer needed due to the updated design.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
---
Krishna Chaitanya Chundru (2):
      PCI: dwc: Fix ECAM enablement when used with vendor drivers
      PCI: dwc: qcom: Revert "PCI: qcom: Prepare for the DWC ECAM enablement"

 drivers/pci/controller/dwc/pcie-designware-host.c | 28 ++++++++--
 drivers/pci/controller/dwc/pcie-qcom.c            | 68 -----------------------
 2 files changed, 24 insertions(+), 72 deletions(-)
---
base-commit: 9b332cece987ee1790b2ed4c989e28162fa47860
change-id: 20251015-ecam_fix-641d1d5ed71d

Best regards,
-- 
Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>