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a="1194226" X-IronPort-AV: E=Sophos;i="6.27,168,1787036400"; d="scan'208";a="1194226" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2026 01:39:07 -0700 X-CSE-ConnectionGUID: k7cAPDenR/WQ760LIOMhOQ== X-CSE-MsgGUID: A8mNRqrdTxma5jvPFwBzJg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,168,1787036400"; d="scan'208";a="2745985" Received: from ettammin-mobl2.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.244.132]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2026 01:39:04 -0700 Received: from kekkonen.localdomain (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with SMTP id 8863411F7E8; Tue, 20 Oct 2026 11:39:01 +0300 (EEST) Date: Tue, 20 Oct 2026 11:39:01 +0300 Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo From: Sakari Ailus To: Alexander Patrakov Cc: johannes.goede@oss.qualcomm.com, adee.sahan@gmail.com, andy@kernel.org, antti.laakso@linux.intel.com, dan.scally@ideasonboard.com, diamondback@cohunt.app, ilpo.jarvinen@linux.intel.com, linux-media@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: Re: [PATCH 2/3] media: i2c: ov5675: Defer the probe until the endpoint exists Message-ID: References: <20261020015001.15672-1-patrakov@gmail.com> <20261020015001.15672-2-patrakov@gmail.com> X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261020015001.15672-2-patrakov@gmail.com> Hi Alexander, On Tue, Oct 20, 2026 at 09:50:00AM +0800, Alexander Patrakov wrote: > On ACPI systems the sensor's endpoint is a software node which ipu-bridge > creates when the IPU probes. Nothing orders that before the probe of the > sensor. If the sensor is first, there is no endpoint yet, parsing it > fails, and the probe fails for good: the camera is missing until the > next boot. > > Return -EPROBE_DEFER when there is no endpoint, as ov2740, ov13b10 and, > since commit 437e1f6a9600 ("media: mt9m114: Return -EPROBE_DEFER if no > endpoint is found"), mt9m114 do. > > This failure mode was seen once on a Lenovo Yoga Duet 7 13ITL6. > Reproduction efforts did not succeed. > > Signed-off-by: Alexander Patrakov This patch is unnecessary as v4l2_fwnode_endpoint_alloc_parse() already validates the endpoint. Also the comment is redundant. -- Regards, Sakari Ailus