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

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Message-Id: <AC3DE87B-64B1-4C34-8E1B-3900E2C53AA3@gmail.com>
Date: Fri, 28 Feb 2025 21:30:33 +0100
From: Piotr Oniszczuk <piotr.oniszczuk@...il.com>
To: Andy Yan <andyshrk@....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: [PATCH 0/6] Add support for RK3588 DisplayPort Controller



> 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?