linux-kernel - [RFC PATCH v2 0/4] Quality Improvements for Rockchip-IP PCIe

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Message-ID: <cover.1749588810.git.geraldogabriel@gmail.com>
Date: Tue, 10 Jun 2025 18:19:35 -0300
From: Geraldo Nascimento <geraldogabriel@...il.com>
To: linux-rockchip@...ts.infradead.org
Cc: Shawn Lin <shawn.lin@...k-chips.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Heiko Stuebner <heiko@...ech.de>, Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	linux-phy@...ts.infradead.org, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 0/4] Quality Improvements for Rockchip-IP PCIe

During a 30-day debugging-run fighting quirky PCIe devices on RK3399
some quality improvements began to take form and this is my attempt
at upstreaming it. It will ensure maximum chance of retraining to Gen2
5.0GT/s, on all four lanes and plus if anybody is debugging the PHY
they'll now get real values from TEST_I[3:0] for every TEST_ADDR[4:0]
without risk of locking up kernel like with present broken async
strobe TEST_WRITE.

---
V1 -> V2: use standard PCIe defines as suggested by Bjorn

Geraldo Nascimento (4):
  PCI: pcie-rockchip: add Link Control and Status Register 2
  PCI: rockchip-host: Set Target Link Speed before retraining
  phy: rockchip-pcie: enable all four lanes
  phy: rockchip-pcie: adjust read mask and write strobe disable

 drivers/pci/controller/pcie-rockchip-host.c |  4 ++++
 drivers/pci/controller/pcie-rockchip.h      | 10 ++++++----
 drivers/phy/rockchip/phy-rockchip-pcie.c    | 16 +++++++++-------
 3 files changed, 19 insertions(+), 11 deletions(-)

-- 
2.49.0