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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Andy Yan <andy.yan@rock-chips.com>
Cc: kernel@pengutronix.de,
	Michael Riesch <michael.riesch@wolfvision.net>,
	Sandy Huang <hjc@rock-chips.com>,
	dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 0/2] drm/rockchip: dw_hdmi: Add 4k@30 support
Date: Wed, 24 Aug 2022 09:07:42 +0200	[thread overview]
Message-ID: <20220824070742.GA28387@pengutronix.de> (raw)
In-Reply-To: <20220822152017.1523679-1-s.hauer@pengutronix.de>

Hi Andy Et al.,

On Mon, Aug 22, 2022 at 05:20:15PM +0200, Sascha Hauer wrote:
> This series adds support for 4k@30 to the rockchip HDMI controller. This
> has been tested on a rk3568 rock3a board. It should be possible to add
> 4k@60 support the same way, but it doesn't work for me, so let's add
> 4k@30 as a first step.

I tried adding 4k@60 support the same way, just by adding the missing
fields for 600MHz in the PLL/phy settings. I get a picture on the
screen, but it's not very stable: The monitor often gets black, scans
through the different HDMI inputs and then syncs again. Also when I
re-plug the cable while weston is running I won't get any picture
anymore (the same works fine with lower resolutions). I also tried
the Rock3a 4.19 Kernel which is based on the Rockchip Kernel and I saw
similar problems there.

Do you have an idea what could go wrong there?

Sascha


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  parent reply	other threads:[~2022-08-24  7:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-22 15:20 [PATCH 0/2] drm/rockchip: dw_hdmi: Add 4k@30 support Sascha Hauer
2022-08-22 15:20 ` [PATCH 1/2] drm/rockchip: dw_hdmi: relax mode_valid hook Sascha Hauer
2022-08-24 16:07   ` Robin Murphy
2022-08-25 11:40     ` Sascha Hauer
2022-09-22 13:09       ` Robin Murphy
2022-08-22 15:20 ` [PATCH 2/2] drm/rockchip: dw_hdmi: Add support for 4k@30 resolution Sascha Hauer
2022-08-24  5:43 ` [PATCH 0/2] drm/rockchip: dw_hdmi: Add 4k@30 support Michael Riesch
2022-08-24  7:10   ` Sascha Hauer
2022-08-24  7:07 ` Sascha Hauer [this message]
2022-09-03  7:53   ` Andy Yan

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