linux-kernel - Re:Re: [PATCH v7 00/10] Add support for RK3588 DisplayPort Controller

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Message-ID: <3e2e87f3.21ca.199000b2cc1.Coremail.andyshrk@163.com>
Date: Sun, 31 Aug 2025 20:12:36 +0800 (CST)
From: "Andy Yan" <andyshrk@....com>
To: "Maud Spierings" <maud_spierings@...mail.com>
Cc: Laurent.pinchart@...asonboard.com, andy.yan@...k-chips.com,
	cristian.ciocaltea@...labora.com, devicetree@...r.kernel.org,
	dmitry.baryshkov@....qualcomm.com, dri-devel@...ts.freedesktop.org,
	heiko@...ech.de, hjc@...k-chips.com, krzk+dt@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, mripard@...nel.org,
	naoki@...xa.com, neil.armstrong@...aro.org, robh@...nel.org,
	sebastian.reichel@...labora.com, stephen@...xa.com,
	yubing.zhang@...k-chips.com
Subject: Re:Re: [PATCH v7 00/10] Add support for RK3588 DisplayPort
 Controller


Hello Maud，

At 2025-08-30 08:46:14, "Maud Spierings" <maud_spierings@...mail.com> wrote:
>Hello Andy,
>
>> There are two DW DPTX based DisplayPort Controller on rk3588 which
>> are compliant with the DisplayPort Specification Version 1.4 with
>> the following features:
>> 
>> * DisplayPort 1.4a
>> * Main Link: 1/2/4 lanes
>> * Main Link Support 1.62Gbps, 2.7Gbps, 5.4Gbps and 8.1Gbps
>> * AUX channel 1Mbps
>> * Single Stream Transport(SST)
>> * Multistream Transport (MST)
>> * Type-C support (alternate mode)
>> * HDCP 2.2, HDCP 1.3
>> * Supports up to 8/10 bits per color component
>> * Supports RBG, YCbCr4:4:4, YCbCr4:2:2, YCbCr4:2:0
>> * Pixel clock up to 594MHz
>> * I2S, SPDIF audio interface
>> 
>> The current version of this patch series only supports basic display outputs.
>> I conducted tests with DP0 in 1080p and 4K@60 YCbCr4:2:0 modes; the ALT/Type-C
>> mode was tested on Rock 5B
>
>Is there an example of this? I want to implement it for the usb-c port 
>on the orangepi 5 plus, but I can't quite figure out where I would have 
>to link the DP output endpoint to?
>
>The usb-c endpoints are all done. Is it to another endpoint in the 
>usbdp_phy? The only endpoints there seem to be outputs. Or is it 
>supposed to be left unconnected for the ALT/type-C mode?
>
>I've tried reading through all the relevant dt-bindings but can't find it.


I have a  test branch for ALT/Type-C mode on Rock 5B here[1]

[1]https://github.com/andyshrk/linux/commits/rk3588-dp-upstream-v6/

>
>Kind regards,
>Maud