From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (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 73B921F4165 for ; Thu, 16 Oct 2025 13:36:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760621776; cv=none; b=Av2cWeMr/Hepd17dTK1q1+drZ9mZWaolxXuvaBEEkbIBHMbTfmvyFzOmJwuWb4tHy4/jf5JTFXjT+O2ySoW693rra66hr88duV9BehoDsw+ueEtwRtYWzW1VW3x/A/BAAVgJb5h57j5FQWpPHb/RxNFLdoPNjBN7SUY6aOEZn9E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760621776; c=relaxed/simple; bh=myhDTwrlDuPGYHqb1hWWIpm1yFy04723XOZCYiLG6Y4=; h=Mime-Version:Content-Type:Date:Message-Id:To:Cc:Subject:From: References:In-Reply-To; b=ULSUxRQdrRJHSV/IkbnR53c7miwr+CNS5aKOR4MXi411mViktMNAZAiJD6vxDBjSamRkf6M+VenxTOe/kJcSjP3wDn1+HgJN4kneXL39ULQTqL1ynxQQpNSRNW+O6rWm/GAhi+In9hAqNFuBQDSMKS2saqb7toxU2Y+7AH4p9nY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=bnnSEeWh; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="bnnSEeWh" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id B29774E41103; Thu, 16 Oct 2025 13:36:12 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 8656A6062C; Thu, 16 Oct 2025 13:36:12 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 213E4102F22EF; Thu, 16 Oct 2025 15:36:02 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1760621771; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=8hlnduBps2CCSYzZqpb5CLnowbo1EYG2ZwR0jxQsXj8=; b=bnnSEeWhKYEVbruz9l2dL0xE/3Ra47wG9Ly3XxMwQsX5E0GEZzTOVG6D0eVkvCDLhZyNwO FvW7GTPa1KqwsikenCJTxC6ii1WYsNz/kh/NwBxWrtGhtFqqxzJ5ogrw2vXzQbSNATBjCd P023c0dKp9XL756GfgsPT1nIO7zo7aLZSpo790eUDblWV6C2QpefCKVo8Ax2fx8njJBba9 P7jMq13dx/jhpWiIAEZ1x7Gk2Cr/s3PZq+aA6GAmYrwptE0fLfPPE4uCQWZ8srJx0/DmfX QUbX7RJtQaoRupKR9vJ1oljYDIU+iTFVcmFD0/h+F1VoGzj1EsKp1Blcvdi1Cg== 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 Date: Thu, 16 Oct 2025 15:36:00 +0200 Message-Id: To: "Naresh Kamboju" , , "open list" , , "Linux Regressions" Cc: "Dmitry Baryshkov" , "Simona Vetter" , "David Airlie" , "Maxime Ripard" , "Arnd Bergmann" , "Dan Carpenter" , "Anders Roxell" , "Ben Copeland" Subject: Re: next-20251014: Internal error: Oops: drm_bridge_connector_hdmi_cec_init drmm_connector_hdmi_cec_register From: "Luca Ceresoli" X-Mailer: aerc 0.20.1 References: In-Reply-To: X-Last-TLS-Session-Version: TLSv1.3 Hello Naresh, On Thu Oct 16, 2025 at 12:52 PM CEST, Naresh Kamboju wrote: > On Thu, 16 Oct 2025 at 16:14, Naresh Kamboju = wrote: >> >> While booting and loading kernel modules on dragonboard 410c board >> with Linux next >> kernel next-20251014 and next-20251015 the following crash noticed, >> >> First seen on next-20251014 >> Good: next-20251013 >> Bad: next-20251014 >> >> Regression Analysis: >> - New regression? yes >> - Reproducibility? yes >> >> Boot regressions: next-20251014: Internal error: Oops: >> drm_bridge_connector_hdmi_cec_init drmm_connector_hdmi_cec_register Thanks for the report. This looks like the same issue reported here: https://lore.kernel.org/all/336fbfdd-c424-490e-b5d1-8ee84043dc80@samsung.co= m/ I'm writing a fix right now, will send it today if all goes well. > These three patches landed recently, > $ git log --oneline next-20251013..next-20251014 > drivers/gpu/drm/display/drm_bridge_connector.c > 2be300f9a0b6f drm/display: bridge_connector: get/put the stored bridges ^ This is the commit introducing the bug. Best regards, Luca -- Luca Ceresoli, Bootlin Embedded Linux and Kernel engineering https://bootlin.com