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 BB8C1CCA471 for ; Mon, 6 Oct 2025 15:30:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:References:Cc:To:From: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=q9R/F8RF5k0Yih8K41fTjRySZqotIPms1EX0TBpshj4=; b=D2Y32/EwrVX5zp sHD/V4ooZraw/DbZLX5ZaKHBERRxGby/A9IIxw9O3AU46Yr10QFMWvro0TULhJJzP5qcXZX5RBFO9 1yRLD/qGnFXaQ2HYCKxpJgt0AsDcfQiAFWejreO2B+ncex95NkvkIAKVq5eDaIRHZUVR9K/J6YR7i M1yvacmKEaIIw9LpDvHWfIApvfWa0bGljItGevm+a+0dLajlydVEN+X4qQUeK1iBe1Wzpm+omoefg F4ENR8GTtT2LUVgx0C01vCkgtB3u/e8NiOpePiwhhtLqZcoDQSE6Ew/om/R9f7DfW0THQrFv3Cxua aZVnTHbbDV1q8FgLC0Qw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v5nAh-00000000Hnw-2ch2; Mon, 06 Oct 2025 15:30:43 +0000 Received: from out-185.mta0.migadu.com ([91.218.175.185]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v5nAe-00000000Hm1-22PR for linux-rockchip@lists.infradead.org; Mon, 06 Oct 2025 15:30:42 +0000 Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1759764625; 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=nXyoKN4j7tjDil/ht3RE4A/98xpfn+XOg18nSC63YxI=; b=Fe/cNu0rr623OU3+9Ti9ilVTCZn9uAu/4R9seUwKi1wiqTULHwiFAtmOQfNqBi/s98yzjN GERZwA4JTt8odBfVuDE6VeHz2PmiluWbhv/obSptS1gcMUx/ZcQ3Us/dAVtmGn5r5OyVHg 0z4dog6KEnfJc3NI3xAgiS/dd3DYNyA= Date: Mon, 6 Oct 2025 16:30:19 +0100 MIME-Version: 1.0 Subject: Re: [PATCH v13 3/4] drm/atomic-helper: Re-order bridge chain pre-enable and post-disable X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Aradhya Bhatia 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, Dmitry Baryshkov , Douglas Anderson , Damon Ding , Sandy Huang , =?UTF-8?Q?Heiko_St=C3=BCbner?= , Andy Yan , Linux Rockchip Support List , Devarsh Thakkar References: Content-Language: en-US In-Reply-To: X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251006_083040_679507_DBC7D021 X-CRM114-Status: GOOD ( 18.98 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org +rockchip maintainers Hi Vicente, all, I went through the drivers and the affected areas in the gru-kevin chromebook pipeline last week, but nothing has stood out. Pipeline: rockchip,display-subsystem / rk3399-vop (Big/Lite) (CRTC) -> rk3399-edp (Encoder) -> analogix_dp_core (Bridge) -> sharp,lq123p (edp-panel) I am unable to debug this further since I do not have the hardware. I could use some help, especially from folks who understand the hardware requirements better. On 11/09/25 09:01, Aradhya Bhatia wrote: > 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 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip