From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 68526FF8868 for ; Mon, 27 Apr 2026 19:10:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=eMiVQtO/20AP/BJG4HATSBBh4qLb0DtjiWzEe2Kk0IY=; b=HQ9mtL0bS0d5lT24LYfD2UWDrg v3DCOW8DAlAfBVFOCH8HP4VK3ZgaaqRqQ4+uA2Tmk7kmU4GIP27gyiwqzp8OSn3lAqJzi/QjmPUyU gGcAdj5nJKSKco48usqaeor7ddT2dGZvE/Hmg5YhqF/jqeCX9aFw9/nr35y11a9sZWXRyCGkTNGbF mI7CjLrcxbtOKbJzPfnJplQMx35XtILDj/Z0wTSweSKHbdobAMNluyTuPu6F0LqTKXOmFHPsBaQql C6X8ph39CQkNxQHc6b2F4wZTkbLSD1hSsF991paJmIGAMglmWNmSniMEyqHwPTCsEfYZh9dqmq/TH V/LDfhOQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHRM4-000000002Gr-2PVZ; Mon, 27 Apr 2026 19:10:52 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wHRM2-000000002G5-0jLY; Mon, 27 Apr 2026 19:10:51 +0000 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> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260427_121050_215874_6DA4D27A X-CRM114-Status: UNSURE ( 7.66 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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