Message-ID: <20190926090434.GA3432@ulmo>
Date:   Thu, 26 Sep 2019 11:04:34 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Nagarjuna Kristam <nkristam@...dia.com>
Cc:     balbi@...nel.org, gregkh@...uxfoundation.org, jonathanh@...dia.com,
        mark.rutland@....com, robh+dt@...nel.org, kishon@...com,
        devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Patch V10 0/8] Tegra XUSB gadget driver support

On Mon, Sep 23, 2019 at 01:55:44PM +0530, Nagarjuna Kristam wrote:
> Patches 1-3 are phy driver changes to add support for device
> mode.
> Patches 4-7 are changes related to XUSB device mode
> controller driver.
> Patch 8 is to enable drivers for XUDC support in defconfig
> 
> Test Steps(USB 2.0):
> - Enable "USB Gadget precomposed configurations" in defconfig
> - Build, flash and boot Jetson TX1
> - Connect Jetson TX1 and Ubuntu device using USB A to Micro B
>   cable
> - After boot on Jetson TX1 terminal usb0 network device should be
>   enumerated
> - Assign static ip to usb0 on Jetson TX1 and corresponding net
>   device on ubuntu
> - Run ping test and transfer test(used scp) to check data transfer
>   communication
> 
> SS mode is verified by enabling Type A port as peripheral
> ---
> v10:
> * Patches 1,2,4,5,7,8 - No changes.
> * Patch 3 has braces added to one single line else condition.
> * Patch 6 has update on compatible string as per suggestion from Chunfeng.
> ---
> v9:
> * Patches 1,2,3,4,5 - No changes.
> * Patch 6 has update on compatible string as per suggestion from Chunfeng.
> * Patch 7 has comment fixes as suggested by Chunfeng.
> * Patch 8 has CONFIG_USB_GPIO enabled as module additionally.
> ---
> v8:
> * Patches 1,2,3,4,5,8 - No changes.
> * Patch 6 has update on compatible string as per change done in [1].
> * Patch 7 has issue fix, where device mode didnot got enabled after resume
>   from suspend.
> ---
> v7:
> * Patches 1,2,3,4,5,6,8 - No changes.
> * Patch 7 - Comments from Balbi and Chunfun adrresed.
>   Added COMPILE_TEST in Kconfig and updated dependencies.
> ---
> v6:
> * Patches 1,2,3,7,8 - No changes.
> * Patch 4,5,6 - Comments from Rob addressed, updated usb connector driver
>   compatibility string.
> ---
> v5:
> * Patches 1-3 - Commit subject updated as per inputs from Thierry.
> * Patch 4 - Added reg-names used on Tegra210 in the bindings doc
> * Enabled xudc driver as module instead of part of kernel in patch 8.
> * Patched 5-8 - No changes.
> ---
> v4:
> * patch 1 - no changes.
> * corrected companion device search based on inputs from Thierry in patch 2.
> * removed unneeded dev variable and corrected value read in
>   tegra210_utmi_port_reset function in patch 3.
> * dt binding doc and dtb files are corrected for alignments.
>   Replaced extcon-usb-gpio with usb role switch.
> * Added support for USB role switch instead of extcon-usb-gpio and other minor
>   comments as suggested by Chunfeng.
> * Enabled xudc driver as module instead of part of kernel in patch 8.
> ---
> V3:
> * Rebased patch 1 to top of tree.
> * Fixed bug in patch 2, where xudc interrupts dont get generated if USB host
>   mode fails to probe. Moved fake port detection logic to generic xusb.c. fake
>   usb port data is updated based on soc flag need_fake_usb3_port.
> * Added extra lines whereever necessary to make code more readable in patch 3
>   and 7.
> * dt binding doc is corrected for typos and extcon references. Also added
>   details for clocks and removed xusb_ references to clock and power-domain
>   names and accordingly patch 5 is updated.
> * removed avdd-pll-utmip-supply in patch 6, as its now part of padctl driver.
> * Patch 8 has no changes.
> ---
> V2:
> * Patches 1-3 are new patches in this series, which splits unified features
>   patch to speprated features and removes need of port-fake entry in DT.
> * Patch 4 is re-arragend dt-bindings patch which incorporates previous
>   patch comments to sort DT entries alphabetically, addresses name changes
>   and PM domain details added.
> * Patch 5-6 are re-arranged DT patches with major changes - sort entries
>   alphabetically, and adds clock names.
> * Patch 7 is UDC driver tegra XUSB device mode controller with major
>   changes - remove un-used module params, lockinng for device_mode flag,
>   moving un-needed info logs to debug level, making changes feature flag
>   dependent rather than SOC based macros and other error handling in probe.
> * Patch 8 has no changes.
> 
> Nagarjuna Kristam (8):
>   phy: tegra: xusb: Add XUSB dual mode support on Tegra210
>   phy: tegra: xusb: Add usb3 port fake support on Tegra210
>   phy: tegra: xusb: Add vbus override support on Tegra210
>   dt-bindings: usb: Add NVIDIA Tegra XUSB device mode controller binding
>   arm64: tegra: Add xudc node for Tegra210
>   arm64: tegra: Enable xudc on Jetson TX1
>   usb: gadget: Add UDC driver for tegra XUSB device mode controller
>   arm64: defconfig: Enable tegra XUDC support
> 
>  .../devicetree/bindings/usb/nvidia,tegra-xudc.txt  |  110 +
>  arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi     |   31 +-
>  arch/arm64/boot/dts/nvidia/tegra210.dtsi           |   19 +
>  arch/arm64/configs/defconfig                       |    2 +
>  drivers/phy/tegra/xusb-tegra210.c                  |  134 +-
>  drivers/phy/tegra/xusb.c                           |   87 +
>  drivers/phy/tegra/xusb.h                           |    4 +
>  drivers/usb/gadget/udc/Kconfig                     |   11 +
>  drivers/usb/gadget/udc/Makefile                    |    1 +
>  drivers/usb/gadget/udc/tegra-xudc.c                | 3787 ++++++++++++++++++++
>  include/linux/phy/tegra/xusb.h                     |    4 +-
>  11 files changed, 4186 insertions(+), 4 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/usb/nvidia,tegra-xudc.txt
>  create mode 100644 drivers/usb/gadget/udc/tegra-xudc.c

Hi Felipe, Kishon,

since the DT bindings have been acked by Rob, I plan on applying the DTS
changes of the above once v5.4-rc1 is release. Do you have any remaining
concerns about the UDC or PHY patches, respectively?

Thierry

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