From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 639393D75A6 for ; Mon, 27 Apr 2026 19:10:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.11.138.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777317052; cv=none; b=hREngZ4AcrUB3zw8Tf/SJJuOpAWTJr1p0qn3TIYaJUJSrJvEdl9tuNGahKPVBo4h/JuIlDBRxopbvvvkkrPcrxBN7cCfRlcTtGCNpxpylNxj1ziuxFRq1zx5EXuF36InYRHdipd9gmL0LTLp5qpgy5XjJQa8u24NlLGBZp0psM4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777317052; c=relaxed/simple; bh=gnx7I49g9urYu/ae71kgIrdLUIVUUxGscUSzgpk+X9Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Ec6N5BjZiHGr4a+sFgp4xAcBOogrm8AejRHdorURraLQpzOC+VBIxxNIj4va9qmJrOgbRV15xF1YrUanIHrwjg7jntB4qk2f0E3Gyf8AbYvxnFrMHPx5kA1M+K8UzpkxYrj+q78/+cXiae+ukjil77Q9sC9OcvAShuBVeNc7XU8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=sntech.de; spf=pass smtp.mailfrom=sntech.de; dkim=pass (2048-bit key) header.d=sntech.de header.i=@sntech.de header.b=Zcf+aeVg; arc=none smtp.client-ip=185.11.138.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=sntech.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sntech.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sntech.de header.i=@sntech.de header.b="Zcf+aeVg" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Reply-To; bh=eMiVQtO/20AP/BJG4HATSBBh4qLb0DtjiWzEe2Kk0IY=; b=Zcf+aeVgoqzfplXbcoalce31z8 +BmBHRruAPnXcH9YOxAp9tjMDCa2Lb0uWI+20zzEttLj2p4HyhLOoA9MlNClW6iJG+YnmKOutdvl2 zIG+m0aUKr3lmoYLV4hgHPxsTic7ka9c1EPDdFX9g/UxcKM04nhnZAkJs0Gtf4l7Vqkp6poE+dleT R265z67Emide8+Pba0LcwfUrmCt6irdOXyVG/CqCZoJ1VrG50t6nvbZpe1/IR8Tx5NOGig9TS5KAo gtVmrnJOZR6ohZ599ZwxmlNJGqI1dHJPMav4aJK2vdoMO10sPfVHs0kFbknsBDZXRDvSQUjhLeEWt EpCX/KNQ==; From: Heiko Stuebner To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sandy Huang , Andy Yan , Cristian Ciocaltea Cc: kernel@collabora.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, Diederik de Haas , Maud Spierings Subject: Re: [PATCH v5 05/10] drm/bridge: dw-hdmi-qp: Add HDMI 2.0 SCDC scrambling and high TMDS clock ratio support Date: Mon, 27 Apr 2026 21:10:35 +0200 Message-ID: <3837777.yKVeVyVuyW@phil> In-Reply-To: <20260426-dw-hdmi-qp-scramb-v5-5-d778e70c317b@collabora.com> References: <20260426-dw-hdmi-qp-scramb-v5-0-d778e70c317b@collabora.com> <20260426-dw-hdmi-qp-scramb-v5-5-d778e70c317b@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Am Sonntag, 26. April 2026, 02:20:17 Mitteleurop=C3=A4ische Sommerzeit schr= ieb 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. >=20 > 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. >=20 > 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. >=20 > Tested-by: Diederik de Haas > Tested-by: Maud Spierings > Signed-off-by: Cristian Ciocaltea 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