linux-kernel - Re: [PATCH v2 0/6] arm64: dts: meson-g12: add support for PCIe

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Message-ID: <20191015131419.GA12343@e121166-lin.cambridge.arm.com>
Date:   Tue, 15 Oct 2019 14:14:19 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, kishon@...com, bhelgaas@...gle.com,
        andrew.murray@....com, linux-amlogic@...ts.infradead.org,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, yue.wang@...ogic.com, maz@...nel.org,
        repk@...plefau.lt, nick@...das.com, gouwa@...das.com
Subject: Re: [PATCH v2 0/6] arm64: dts: meson-g12: add support for PCIe

On Mon, Sep 16, 2019 at 02:50:16PM +0200, Neil Armstrong wrote:
> This patchset :
> - updates the Amlogic PCI bindings for G12A
> - reworks the Amlogic PCIe driver to make use of the
> G12a USB3+PCIe Combo PHY instead of directly writing in
> the PHY register
> - adds the necessary operations to the G12a USB3+PCIe Combo PHY driver
> - adds the PCIe Node for G12A, G12B and SM1 SoCs
> - adds the commented support for the S922X, A311D and S905D3 based
> VIM3 boards.
> 
> The VIM3 schematic can be found at [1].
> 
> This patchset is dependent on Remi's "Fix reset assertion via gpio descriptor"
> patch at [2].

Merged in pci/meson; however, I am not sure what should be done on
Remi's patch, I would like to queue it up too otherwise it looks
to me that merging this series is not right.

Lorenzo

> This patchset has been tested in a A311D VIM3 and S905D3 VIM3L using a
> 128Go TS128GMTE110S NVMe PCIe module.
> 
> For indication, here is a bonnie++ run as ext4 formatted on the VIM3:
>      ------Sequential Output------ --Sequential Input- --Random-
>      -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
>   4G 93865  99 312837  96 194487  23 102808  97 415501 21 +++++ +++
> 
> and the S905D3 VIM3L version:
>      ------Sequential Output------ --Sequential Input- --Random-
>      -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
>   4G 52144  95 71766  21 47302  10 57078  98 415469  44 +++++ +++
> 
> Changes since v1 at [3]:
>  - Collected Andrew's and Rob's Reviewed-by tags
>  - Added missing calls to phy_init/phy_exit
>  - Fixes has_shared_phy handling for MIPI clock
>  - Add comment in the DT concerning firmware setting the right properties
>  - Added SM1 Power Domain to PCIe node
> 
> [1] https://docs.khadas.com/vim3/HardwareDocs.html
> [2] https://patchwork.kernel.org/patch/11125261/
> [3] https://patchwork.kernel.org/cover/11136927/
> 
> Neil Armstrong (6):
>   dt-bindings: pci: amlogic,meson-pcie: Add G12A bindings
>   PCI: amlogic: Fix probed clock names
>   PCI: amlogic: meson: Add support for G12A
>   phy: meson-g12a-usb3-pcie: Add support for PCIe mode
>   arm64: dts: meson-g12a: Add PCIe node
>   arm64: dts: khadas-vim3: add commented support for PCIe
> 
>  .../bindings/pci/amlogic,meson-pcie.txt       |  12 +-
>  .../boot/dts/amlogic/meson-g12-common.dtsi    |  33 +++++
>  .../amlogic/meson-g12b-a311d-khadas-vim3.dts  |  25 ++++
>  .../amlogic/meson-g12b-s922x-khadas-vim3.dts  |  25 ++++
>  .../boot/dts/amlogic/meson-khadas-vim3.dtsi   |   4 +
>  .../dts/amlogic/meson-sm1-khadas-vim3l.dts    |  25 ++++
>  arch/arm64/boot/dts/amlogic/meson-sm1.dtsi    |   4 +
>  drivers/pci/controller/dwc/pci-meson.c        | 132 ++++++++++++++----
>  .../phy/amlogic/phy-meson-g12a-usb3-pcie.c    |  70 ++++++++--
>  9 files changed, 292 insertions(+), 38 deletions(-)
> 
> -- 
> 2.22.0
>