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Date:   Mon, 12 Jul 2021 13:49:44 +0530
From:   Manivannan Sadhasivam <mani@kernel.org>
To:     Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc:     Rob Herring <robh@kernel.org>, linuxarm@huawei.com,
        mauro.chehab@huawei.com,
        Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= <kw@linux.com>,
        Binghui Wang <wangbinghui@hisilicon.com>,
        Rob Herring <robh+dt@kernel.org>,
        Xiaowei Song <songxiaowei@hisilicon.com>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
        linux-phy@lists.infradead.org
Subject: Re: [PATCH v3 0/9] Add support for Hikey 970 PCIe
Message-ID: <20210712081944.GC8113@workstation>
References: <cover.1625826353.git.mchehab+huawei@kernel.org>
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Hi Mauro,

On Fri, Jul 09, 2021 at 12:41:36PM +0200, Mauro Carvalho Chehab wrote:
> As requested by Rob Herring, this series split the PHY part into a separate driver.
> Then, it adds support for Kirin 970 on a single patch.
> 
> With this change, the PHY-specific device tree bindings for Kirin 960 moved
> to its own PHY properties.
> 
> Manivannan,
> 
> Please notice that the last two patches are marked as co-developed:
> 
> 	phy: hisilicon: add driver for Kirin 970 PCIe PHY
> 	arm64: dts: hisilicon: Add support for HiKey 970 PCIe controller hardware
> 
> The first one contains the code you submitted in the past adding
> support for Kirin 970 at the pcie-kirin driver, modified by me and
> moved to a separate driver.
> 
> The second one is the DTS file, also modified by me in order to split the PHY
> properties from the PCIe ones.
> 
> Please send your SoB to confirm that both changes are OK for you.
> 

I'm fine with the changes. The dts patch already has my s-o-b as you
preserved my authorship and I've sent my s-o-b for the driver patch.
I used my korg address for the driver patch but that's fine as all these
efforts were done in my spare time.

Thanks,
Mani

> Tested on Hikey970:
> 
>   $ lspci
>   00:00.0 PCI bridge: Huawei Technologies Co., Ltd. Device 3670 (rev 01)
>   01:00.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   02:01.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   02:04.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   02:05.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   02:07.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   02:09.0 PCI bridge: PLX Technology, Inc. PEX 8606 6 Lane, 6 Port PCI Express Gen 2 (5.0 GT/s) Switch (rev ba)
>   06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
> 
>   $ ethtool enp6s0
>   Settings for enp6s0:
> 	Supported ports: [ TP	 MII ]
> 	Supported link modes:   10baseT/Half 10baseT/Full
> 	                        100baseT/Half 100baseT/Full
> 	                        1000baseT/Half 1000baseT/Full
> 	Supported pause frame use: Symmetric Receive-only
> 	Supports auto-negotiation: Yes
> 	Supported FEC modes: Not reported
> 	Advertised link modes:  10baseT/Half 10baseT/Full
> 	                        100baseT/Half 100baseT/Full
> 	                        1000baseT/Half 1000baseT/Full
> 	Advertised pause frame use: Symmetric Receive-only
> 	Advertised auto-negotiation: Yes
> 	Advertised FEC modes: Not reported
> 	Link partner advertised link modes:  10baseT/Half 10baseT/Full
> 	                                     100baseT/Half 100baseT/Full
> 	Link partner advertised pause frame use: Symmetric Receive-only
> 	Link partner advertised auto-negotiation: Yes
> 	Link partner advertised FEC modes: Not reported
> 	Speed: 100Mb/s
> 	Duplex: Full
> 	Auto-negotiation: on
> 	master-slave cfg: preferred slave
> 	master-slave status: slave
> 	Port: Twisted Pair
> 	PHYAD: 0
> 	Transceiver: external
> 	MDI-X: Unknown
>   netlink error: Operation not permitted
> 	Link detected: yes
> 
> Partially tested on Hikey 960[1]:
> 
>   $ lspci
>   00:00.0 PCI bridge: Huawei Technologies Co., Ltd. Device 3660 (rev 01)
> 
> [1] The Hikey 960 doesn't come with any internal PCIe device.
>     Its hardware supports just an external device via a M.2 slot that
>     doesn't support SATA. I ordered a NVMe device to test, but the vendor
>     is currently out of supply. It should take 4-5 weeks to arrive here. I'll
>     run an extra test on it once it arrives.
> 
> Manivannan Sadhasivam (1):
>   arm64: dts: hisilicon: Add support for HiKey 970 PCIe controller
>     hardware
> 
> Mauro Carvalho Chehab (8):
>   dt-bindings: phy: add bindings for Hikey 960 PCIe PHY
>   dt-bindings: phy: add bindings for Hikey 970 PCIe PHY
>   dt-bindings: PCI: kirin: fix compatible string
>   dt-bindings: PCI: kirin: drop PHY properties
>   phy: hisilicon: add a PHY driver for Kirin 960
>   PCI: kirin: drop the PHY logic from the driver
>   PCI: kirin: use regmap for APB registers
>   phy: hisilicon: add driver for Kirin 970 PCIe PHY
> 
>  .../devicetree/bindings/pci/kirin-pcie.txt    |  21 +-
>  .../phy/hisilicon,phy-hi3660-pcie.yaml        |  82 ++
>  .../phy/hisilicon,phy-hi3670-pcie.yaml        | 101 ++
>  arch/arm64/boot/dts/hisilicon/hi3660.dtsi     |  29 +-
>  arch/arm64/boot/dts/hisilicon/hi3670.dtsi     |  72 ++
>  .../boot/dts/hisilicon/hikey970-pmic.dtsi     |   1 -
>  drivers/pci/controller/dwc/pcie-kirin.c       | 298 ++----
>  drivers/phy/hisilicon/Kconfig                 |  20 +
>  drivers/phy/hisilicon/Makefile                |   2 +
>  drivers/phy/hisilicon/phy-hi3660-pcie.c       | 325 +++++++
>  drivers/phy/hisilicon/phy-hi3670-pcie.c       | 892 ++++++++++++++++++
>  11 files changed, 1572 insertions(+), 271 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3660-pcie.yaml
>  create mode 100644 Documentation/devicetree/bindings/phy/hisilicon,phy-hi3670-pcie.yaml
>  create mode 100644 drivers/phy/hisilicon/phy-hi3660-pcie.c
>  create mode 100644 drivers/phy/hisilicon/phy-hi3670-pcie.c
> 
> -- 
> 2.31.1
> 
>