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

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Message-Id: <20251203-dw-hdmi-qp-scramb-v1-0-836fe7401a69@collabora.com>
Date: Wed, 03 Dec 2025 20:27:51 +0200
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: 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: [PATCH 0/4] Add HDMI 2.0 support to DW HDMI QP TX

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, 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