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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 7A545CA1016 for ; Thu, 11 Sep 2025 08:10:50 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E689110E2ED; Thu, 11 Sep 2025 08:10:49 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=linux.dev header.i=@linux.dev header.b="Y0PtBuTx"; dkim-atps=neutral X-Greylist: delayed 519 seconds by postgrey-1.36 at gabe; Thu, 11 Sep 2025 08:10:47 UTC Received: from out-172.mta1.migadu.com (out-172.mta1.migadu.com [95.215.58.172]) by gabe.freedesktop.org (Postfix) with ESMTPS id CF16710E2ED for ; Thu, 11 Sep 2025 08:10:47 +0000 (UTC) Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1757577725; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=K67vmxq2HZ39DJMkybahbBR4YyS9YEseE2GLLOUwTdM=; b=Y0PtBuTx+N3QMx+FF8DLSb4fH6nYGf2kr2PqAoRm4c7jqgwWBwoZ6vfRqM1KKMRtc2+k+m FcDJ6rQ1Nnb9wDJZXDEmsusCTI3p0t8ddE53Yzsx/oqgV3DznvL6osW9QGcAfreaN88Hqh KN4cTzns90E9GUvA22sBnM7mwPIelGU= Date: Thu, 11 Sep 2025 09:01:50 +0100 MIME-Version: 1.0 Subject: Re: [PATCH v13 3/4] drm/atomic-helper: Re-order bridge chain pre-enable and post-disable To: Vicente Bergas Cc: Laurent.pinchart@ideasonboard.com, airlied@gmail.com, alexander.sverdlin@siemens.com, andrzej.hajda@intel.com, devarsht@ti.com, dri-devel , jernej.skrabec@gmail.com, Jonas Karlman , Linux Kernel Mailing List , lumag@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, neil.armstrong@linaro.org, nm@ti.com, rfoss@kernel.org, simona@ffwll.ch, tomi.valkeinen@ideasonboard.com, tzimmermann@suse.de, vigneshr@ti.com References: Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Aradhya Bhatia In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Vicente, Thank you for the bisection and reporting the issue. On 10/09/25 16:17, Vicente Bergas wrote: > Hi, > this patch causes a regression. It has been reported in > https://bugzilla.kernel.org/show_bug.cgi?id=220554 > > It affects the gru/kevin platform (arm64,RK3399) with the Panfrost DRM driver. I believe the Panfrost DRM driver may only be for the GPU. Based on the dts files in arm64/rockchip/, this is the pipeline of the gru-kevin setup that I understand. rk3399-vop (Big/Lite) -> rk3399-edp -> sharp,lq123p (edp-panel) The setup seems to be using the drm/rockchip drivers for the display controller and for the bridge. > > When it boots in console mode, the blinking of the cursor keeps the display on. > If it is turned off via /sys/class/graphics/fbcon/cursor_blink, then > the display briefly shows each key press presented on screen for less > than one second and then powers off. > > When starting the graphical mode (wayland), if there are no > applications drawing on the screen, the only way to keep the display > on is by continuously moving the mouse. > Okay! I will have a look through the drivers. In the meanwhile, please do report back if you find any other observations. -- Regards Aradhya