[RFC PATCH v3 0/3] PCI: rockchip-host: Support quirky devices

From: Geraldo Nascimento <geraldogabriel@gmail.com>
To: linux-rockchip@lists.infradead.org
Cc: "Hugh Cole-Baker" <sigmaris@gmail.com>,
	"Shawn Lin" <shawn.lin@rock-chips.com>,
	"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.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
Subject: [RFC PATCH v3 0/3] PCI: rockchip-host: Support quirky devices
Date: Tue, 10 Jun 2025 16:05:10 -0300	[thread overview]
Message-ID: <cover.1749582046.git.geraldogabriel@gmail.com> (raw)

Hi folks,

while I understand there are lots of already-working PCIe devices
on RK3399 there are also many quirky devices which fail link
training and refuse to enumerate. This RFC series is meant to
alleviate this problem and has been tested on my Rock Pi N10.

Note that with these patches, link will train for quirky devices
but with Gen1 only and only one lane (x1). I have separate patches
for improving to Gen2 and all four lanes (x4). They don't depend on
this fix however and since I predict the present patches are bound
to be controversial, I decided to send the quality improvements
separately.

---
V2 -> V3: separated commit for reordering function as per Bjorn's
suggestion
V1 -> V2: adjusted commit message to be more clear about change

Geraldo Nascimento (3):
  PCI: rockchip-host: reorder rockchip_pcie_set_vpcie()
  PCI: rockchip-host: Retry link training on failure without PERST#
  arm64: dts: rockchip: drop PCIe 3v3 always-on and boot-on

 .../dts/rockchip/rk3399pro-vmarc-som.dtsi     |   2 -
 drivers/pci/controller/pcie-rockchip-host.c   | 141 +++++++++++-------
 2 files changed, 87 insertions(+), 56 deletions(-)

-- 
2.49.0