Re: [PATCH v5 05/10] drm/bridge: dw-hdmi-qp: Add HDMI 2.0 SCDC scrambling and high TMDS clock ratio support

Heiko Stuebner
2026-04-27T19:10:55Z

Am Sonntag, 26. April 2026, 02:20:17 Mitteleuropäische Sommerzeit schrieb Cristian Ciocaltea:
> Enable HDMI 2.0 display modes (e.g. 4K@60Hz) by adding SCDC management
> for the high TMDS clock ratio and scrambling, required when the TMDS
> character rate exceeds the 340 MHz HDMI 1.4b limit.
>
> A periodic work item monitors the sink's scrambling status to recover
> from sink-side resets. On hotplug detect, if SCDC scrambling state is
> out of sync with the driver, trigger a CRTC reset to re-establish the
> link.
>
> Reject modes requiring TMDS rates above 600 MHz, as those fall in the
> HDMI 2.1 FRL domain which is not supported. In no_hpd configurations,
> further restrict to 340 MHz since SCDC requires a connected sink.
>
> Tested-by: Diederik de Haas <diederik@cknow-tech.com>
> Tested-by: Maud Spierings <maud_spierings@hotmail.com>
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>

The change looks fine to my semi-trained eye, so even with my copyright
concern addressed, I can only provide an

Acked-by: Heiko Stuebner <heiko@sntech.de>