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

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Message-ID: <4ec78537-5184-4e6b-9ada-ff268fbe9c3e@murena.io>
Date: Sun, 7 Dec 2025 14:16:32 +0100
From: Maud Spierings <maud_spierings@...ena.io>
To: cristian.ciocaltea@...labora.com
Cc: Laurent.pinchart@...asonboard.com, airlied@...il.com,
 andrzej.hajda@...el.com, andy.yan@...k-chips.com,
 dri-devel@...ts.freedesktop.org, heiko@...ech.de, hjc@...k-chips.com,
 jernej.skrabec@...il.com, jonas@...boo.se, kernel@...labora.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-rockchip@...ts.infradead.org, maarten.lankhorst@...ux.intel.com,
 mripard@...nel.org, neil.armstrong@...aro.org, rfoss@...nel.org,
 simona@...ll.ch, tzimmermann@...e.de
Subject: Re: [PATCH 0/4] Add HDMI 2.0 support to DW HDMI QP TX

Awesome work! I've been waiting for this feature!

I can now actually get 1440p100 on my display and 4k60 on my tv over HDMI.

Tested-by: Maud Spierings <maud_spierings@...mail.com>

Kind regards,
Maud

> 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