linux-kernel - Re: [PATCH v2 0/4] Add HDMI 2.0 support to DW HDMI QP TX

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Message-ID:
 <SN6PR1901MB465494AAFA4090D8806D7B12A58FA@SN6PR1901MB4654.namprd19.prod.outlook.com>
Date: Wed, 14 Jan 2026 10:16:25 -0600
From: Chris Morgan <macromorgan@...mail.com>
To: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	Diederik de Haas <diederik@...ow-tech.com>,
	Maud Spierings <maud_spierings@...mail.com>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Sandy Huang <hjc@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v2 0/4] Add HDMI 2.0 support to DW HDMI QP TX

On Tue, Jan 13, 2026 at 12:40:46AM +0200, Cristian Ciocaltea wrote:
> On 1/13/26 12:26 AM, Cristian Ciocaltea wrote:
> > This patch series provides the missing support for high TMDS clock ratio
> > and scrambling to DW HDMI QP TX library, required for handling HDMI 2.0
> > display modes on RK3576 & RK3588 SoCs.
> > 
> > In order to allow addressing the SCDC status lost on sink disconnects,
> > it adds an atomic variant of the drm_bridge_funcs.detect callback and a
> > new drm_bridge_detect_ctx() helper, which is further used in
> > drm_bridge_connector to switch to ->detect_ctx hook.
> > 
> > Furthermore, it optimizes HPD event handling in dw_hdmi_qp Rockchip
> > platform driver to run the detect cycle on the affected connector only.
> > 
> > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
> > ---
> > Changes in v2:
> > - Collected Tested-by tags from Diederik and Maud
> > - Rebased onto latest drm-misc-next
> > - Ensured the recently introduced 'no-hpd' support for dealing with
> >   unconnected/repurposed/broken HPD pin is limited to HDMI 1.4 rates
> 
> Chris, could you please confirm no-hpd is still functional with this series on
> your Gameforce Ace board when testing with a HDMI 2.0 display?
> 
> Thanks,
> Cristian
> 

I can confirm no-hpd still works with this series, but I don't have an
HDMI 2.0 monitor to test with.

Thank you,
Chris