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

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Message-Id: <AD2A56F9-B4FB-406B-BE7C-49BB5DFD3BAD@gmail.com>
Date: Sun, 9 Mar 2025 21:53:50 +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 7 mar 2025, o godz. 01:48:
> 
> 
> Hi Piotr,
> 在 2025-03-06 22:28:08，"Piotr Oniszczuk" <piotr.oniszczuk@...il.com> 写道：
>> 
>> 
> 
> All dump information currently appears to be correct, so I'm temporarily unsure why
> there is no display on the monitor.
> Maybe try some plug and unplug for the DP cable, or try another cable or monitor?
> 
> It seems that this board uses a DP to HDMI converter? Does this transmitter need a driver?
> 
> I won't be at my computer over the next two or three days, so any further replies to your email
> might have to wait until next week.
> 
> 

Andy,
FYI:

I done test on mine rock5a with applied Naoki dp0 enablement in dts (and only in dts).
No any changes in dw dp driver (so i’m on vanilla  https://patchwork.kernel.org/project/linux-rockchip/cover/20250223113036.74252-1-andyshrk@163.com/   )

on mine rock5a ra620 hdmi port works ok.
(I contacted also Radxa about ra620 and they confirmed: ra620 is just DP->HDMI converter. No any driver nor special programming/enablement is needed)

This tells me that dp0 (rock5a) works ok while dp1 (rock5itx) not.
i suspect issue is probably in https://patchwork.kernel.org/project/linux-rockchip/cover/20250223113036.74252-1-andyshrk@163.com/ and is related to dp1 handling?

BTW: there seems to be issue with video modes handling on dp0 port: 
-playing video 1920@...0@50 - ok
-playing then video1920@...0@59,64 hangs board….

hdmi0 works ok. video modes issue is only on dp0