From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-179.mta1.migadu.com (out-179.mta1.migadu.com [95.215.58.179]) (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 55BC62D238B for ; Thu, 11 Sep 2025 08:02:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757577731; cv=none; b=q9fBJ0jwvCKrb8dvxr1Q7EtLS3O9nItMUKvhNJ55itzc8Ka8vH0iXhX5ZKmrAJfq/ncuBLPkUVI8njQAi5TKzcSPBJnKEsawwPlGpzCOHp5A5uk8iqzQpD1ZfOfdwUbwHID+KjtLsxQtYkzx9Mrk9OemuTJY+/ELIWpn/ZEaATg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757577731; c=relaxed/simple; bh=hDQSlg1SLcKbY3HExQ+HLpGKBuVzQYr13qm+cEmDKSg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BA/gPM5AXWkgnZVeEuqpkuVi7CUlRO1C17gktGx5tGZHV44m7w+AoUYjca5ZZNnWYZ1KLWbH+iOQhLChLFiDkI8hu0XEE3a6hPIfwC2RcQfIrFvwaLLFqomtOSIVIIWabJlLru1lxgE+a1pYCee9ZcmVx/LCYehHbo7dB0P5s30= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Y0PtBuTx; arc=none smtp.client-ip=95.215.58.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Y0PtBuTx" 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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