[PATCH 0/3] PCI: rockchip: 5.0 GT/s speed may be dangerous

From: Geraldo Nascimento <geraldogabriel@gmail.com>
To: linux-rockchip@lists.infradead.org
Cc: "Shawn Lin" <shawn.lin@rock-chips.com>,
	"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Krzysztof Wilczyński" <kwilczynski@kernel.org>,
	"Manivannan Sadhasivam" <mani@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Heiko Stuebner" <heiko@sntech.de>,
	linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	"Johan Jonker" <jbx6244@gmail.com>,
	"Geraldo Nascimento" <geraldogabriel@gmail.com>,
	"Dragan Simic" <dsimic@manjaro.org>
Subject: [PATCH 0/3] PCI: rockchip: 5.0 GT/s speed may be dangerous
Date: Sat, 15 Nov 2025 06:10:01 -0300	[thread overview]
Message-ID: <cover.1763197368.git.geraldogabriel@gmail.com> (raw)

In recent interactions with Shawn Lin from Rockchip it came to my
attention there's an unknown errata regarding 5.0 GT/s operational
speed of their PCIe core. According to Shawn there's grave danger
even if the odds are low. To contain any damage, let's cover the
remaining corner-cases where the default would lead to 5.0 GT/s
operation as well as add a comment to Root Complex driver core,
documenting this danger.

Geraldo Nascimento (3):
  PCI: rockchip: warn of danger of 5.0 GT/s speeds
  PCI: rockchip-host: comment danger of 5.0 GT/s speed
  arm64: dts: rockchip: drop max-link-speed = <2> in helios64 PCIe

 arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts | 1 -
 drivers/pci/controller/pcie-rockchip-host.c            | 5 +++++
 drivers/pci/controller/pcie-rockchip.c                 | 8 ++++++--
 3 files changed, 11 insertions(+), 3 deletions(-)

-- 
2.49.0