[v10 PATCH 0/5] Rockchip Type-C and DisplayPort driver

Chris Zhong zyw at rock-chips.com
Wed Aug 10 11:00:02 PDT 2016

Hi Chanwoo

On 08/10/2016 08:37 AM, Chanwoo Choi wrote:
> Hi Chris,
> On 2016년 08월 10일 08:32, Chris Zhong wrote:
>> Hi all
>> This series patch is for rockchip Type-C phy and DisplayPort controller
>> driver.
>> The USB Type-C PHY is designed to support the USB3 and DP applications.
>> The PHY basically has two main components: USB3 and DisplyPort. USB3
>> operates in SuperSpeed mode and the DP can operate at RBR, HBR and HBR2
>> data rates. The Type-C cable orientation detection and Power Delivery
>> (PD) is accomplished using a PD PHY or a exernal PD chip.
>> The DP controller is compliant with DisplayPort Specification,
>> Version 1.3, This IP is compatible with the rockchip type-c PHY IP.
>> There is a uCPU in DP controller, it need a firmware to work, please
>> put the firmware file[0] to /lib/firmware/rockchip/dptx.bin. The uCPU
>> in charge of aux communication and link training, the host use mailbox
>> to communicate with the ucpu.
>> The DP contoller has register a notification with extcon API, to get the
>> alt mode from PD, the PD driver need call the devm_extcon_dev_allocate
>> to create a extcon device and use extcon_set_state to notify DP
>> controller. And call extcon_set_cable_property to set orientation.
>> About the DP audio, cdn-dp registered 2 DAIs: 0 is I2S, 1 is SPDIF.
>> We can reference them in simple-card.
>> This series is based on Mark Yao's branch[1] and Chanwoo Choi's
>> extcon-next branch[2], and the clk patch[3].
>> I test this patches on the rk3399-evb board, with a fusb302 driver,
>> this branch has no rk3399.dtsi, so the patch about dts is not included
>> in this series.
>> >From V9, the Type-C PHY is split into two PHYs: DP and USB3. The PHY
>> will be init, no matter which PHY be power_on. The DP module will
>> enter A2 mode (standby mode) after phy_init, if DP PHY is powered on,
>> the DP module will enter to A0 mode(running mode). Then if DP PHY is
>> powered off, DP module will back to A2 mode. If everything is
>> un-plugged, phy will be deinit.
>> [0]
>> https://patchwork.kernel.org/patch/9249693/
>> [1]
>> https://github.com/markyzq/kernel-drm-rockchip/tree/drm-rockchip-next-2016-05-23
>> [2]
>> https://git.kernel.org/cgit/linux/kernel/git/chanwoo/extcon.git/log/?h=extcon-test
>> - extcon: Add the extcon_type to gather each connector into five category
>> - extcon: Add the support for extcon property according to extcon type
>> - extcon: Add the support for the capability of each property
>> - extcon: Rename the extcon_set/get_state() to maintain the function naming
>> pattern
>> - extcon: Add the synchronization extcon APIs to support the notification
>> - extcon: Add EXTCON_DISP_DP and the property for USB Type-C
> The extcon patches are merged on extcon-next branch.
> So, you can check them on both extcon git and linux-next git repo.
Oh, did not notice these extcon patches has landed.
I will remove this section, if next version DP is required.
> [snip]
> Regards,
> Chanwoo Choi

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