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

Open Source and information security mailing list archives

Message-Id: <DFGUQPIJWYDR.2LEI3CON9X7GJ@cknow-tech.com>
Date: Mon, 05 Jan 2026 19:03:32 +0100
From: "Diederik de Haas" <diederik@...ow-tech.com>
To: "Cristian Ciocaltea" <cristian.ciocaltea@...labora.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>
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>
Subject: Re: [PATCH 0/4] Add HDMI 2.0 support to DW HDMI QP TX

On Wed Dec 3, 2025 at 7:27 PM CET, 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.

I tested this patch set with my 4K TV and Rock 5B and without it I did
not see 4K@60, only 4K@30. With this patch set also a number of 4K
related display settings appeared which were not there without it.
So thanks a lot for this patch set. Feel free to add:

Tested-by: Diederik de Haas <diederik@...ow-tech.com>

Cheers,
  Diederik

> 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, optimize 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>
> ---
> Cristian Ciocaltea (4):
>       drm/bridge: Add ->detect_ctx hook and drm_bridge_detect_ctx()
>       drm/bridge-connector: Switch to using ->detect_ctx hook
>       drm/bridge: dw-hdmi-qp: Add high TMDS clock ratio and scrambling support
>       drm/rockchip: dw_hdmi_qp: Do not send HPD events for all connectors
>
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c   | 174 +++++++++++++++++++++++--
>  drivers/gpu/drm/display/drm_bridge_connector.c |  73 ++++++-----
>  drivers/gpu/drm/drm_bridge.c                   |  58 +++++++++
>  drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c |  44 +++----
>  include/drm/drm_bridge.h                       |  30 +++++
>  5 files changed, 308 insertions(+), 71 deletions(-)
> ---
> base-commit: ac5b392a8c355001c4c3f230a0e4b1f904e359ca
> change-id: 20251203-dw-hdmi-qp-scramb-cdbd8b57ccf9
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives