linux-kernel - Re:Re: [PATCH 0/6] Add support for RK3588 DisplayPort Controller

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Message-ID: <7b8767fc.3607.19551aa5f74.Coremail.andyshrk@163.com>
Date: Sat, 1 Mar 2025 20:24:34 +0800 (CST)
From: "Andy Yan" <andyshrk@....com>
To: "Piotr Oniszczuk" <piotr.oniszczuk@...il.com>
Cc: heiko@...ech.de, neil.armstrong@...aro.org,
	sebastian.reichel@...labora.com, devicetree@...r.kernel.org,
	hjc@...k-chips.com, mripard@...nel.org, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, yubing.zhang@...k-chips.com,
	dri-devel@...ts.freedesktop.org,
	"Andy Yan" <andy.yan@...k-chips.com>, krzk+dt@...nel.org,
	robh@...nel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re:Re: [PATCH 0/6] Add support for RK3588 DisplayPort Controller


Hi Piotr,

在 2025-03-01 04:30:33，"Piotr Oniszczuk" <piotr.oniszczuk@...il.com> 写道：
>
>
>> Wiadomość napisana przez Andy Yan <andyshrk@....com> w dniu 23 lut 2025, o godz. 12:30:
>> 
>> From: Andy Yan <andy.yan@...k-chips.com>
>> 
>> 
>> 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 in 1080p and 4K@60 YCbCr4:2:0 modes; the ALT/Type-C mode
>> hasn't been tested yet, but I suspect it will likely work. HDCP and audio
>> features remain unimplemented. For RK3588, it's only support SST, while in
>> the upcoming RK3576, it can support MST output.
>> 
>
>Andy,
>
>Is tis series enough to get usbc1/dp1 working as video output ?
>(assuming i will add necessary code in dt) 
>
>rock5-itx has second hdmi port using usbc1/dp1 lanes 2,3 to ra620 dp->hdmi converter
>
>is it worth to play with this or it is too early?

I think you could give it a try if it using the Standard DP（non-ALT mode） port for output. 
Since I don't currently have a development board with DP1 output available, I haven't been
able to test it yet. As for the Type-C Alternate Mode output, some patches are still required 
I'll  send it with V2 tomorrow or next week.
Feel free to let me know if If you encounter any issues。


>