linux-kernel - Re: [PATCH 00/13] rockchip: Enable 4K@...z mode on RK3228, RK3328, RK3399 and RK356x

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Date: Mon, 01 Jul 2024 11:45:21 +0200
From: Diederik de Haas <didi.debian@...ow.org>
To: dri-devel@...ts.freedesktop.org, linux-rockchip@...ts.infradead.org,
 Jonas Karlman <jonas@...boo.se>
Cc: linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 linux-kernel@...r.kernel.org, Jonas Karlman <jonas@...boo.se>,
 Diederik de Haas <didi.debian@...ow.org>
Subject: Re: [PATCH 00/13] rockchip: Enable 4K@...z mode on RK3228, RK3328,
 RK3399 and RK356x

Hi Jonas,

On Monday, 1 July 2024 11:07:50 CEST Diederik de Haas wrote:
> On Saturday, 15 June 2024 19:03:51 CEST Jonas Karlman wrote:
> > This prepares and enable use of HDMI2.0 modes, e.g. 4K@...z, on RK3228,
> > RK3328, RK3399 and RK356x.
> > ...
> > This series may not fully depend on but was only tested together with
> > the series "drm: bridge: dw_hdmi: Misc enable/disable, CEC and EDID
> > cleanup" at [1].
> > [1] https://patchwork.freedesktop.org/series/134727/
> 
> I only just now realized this part of your message and consequently
> I had NOT applied the referenced patch set.
> 
> > I have tested 4K modes on following devices:
> > - Asus TinkerBoard (RK3288)
> > - Pine64 Rock64 (RK3328)
> > - Radxa ROCK Pi 4 (RK3399)
> > - Radxa ROCK 3A (RK3568)
> 
> And I can confirm that this patch set enables 4K(@60Hz) resolution when
> connecting my Rock64 to my 4K TV with my self-build 6.10-rc5 kernel.
> It selected the 3840x2160@...z resolution, but ``swaymsg -t get_outputs``
> also reported a range of 4096x2160 resolutions.
> 
> In contrast, my 6.10-rc2 kernel which is quite similar, except for this
> patch set, does not mention any 4K resolution at all.
> 
> So AFAIC you can already include:
> Tested-by: Diederik de Haas <didi.debian@...ow.org>
> 
> Next up will be a test with my Quartz64 Model B (RK3566).

The Q64-B test results were a bit different from Rock64's, but this patch set 
enabled the 4K@...z resolution as well.

1. The console output was at 1080p, whereas it also switched to 4K on the 
Rock64. I actually prefer this behavior.
2. After starting sway, it did switch to a 4K resolution, but this time it 
selected 4096x2160@...z on an unpatched kernel (my 6.10-rc2 and Debian 6.9.7).
With my 6.10-rc5 kernel *with* this patch, it selected 3840x2160@...z
3. None of those 'other' issues I reported with Rock64 showed up on Q64-B :-D

IOW: Also for the Pine64 Quartz64 Model B, you can add:
Tested-by: Diederik de Haas <didi.debian@...ow.org>

Cheers,
  Diederik
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