From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 2D9EC1C84A5 for ; Thu, 26 Jun 2025 15:22:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750951379; cv=none; b=tIcGR5J9o2SCoT7BFV2eUTiQGOG9eMg47dsB23La4TRY6M3DKmcWsLJG6lblKfW4nr+yPqPOHYA6dMWf0Fmz0zwxGG0ZVL94AFnUdQ8Xuytno5YlZWUdpV7Qi5OvPily6rpWXCI/zm2qjWHGvPGkZo5SECXOgEg1PH5XpdYBLAM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750951379; c=relaxed/simple; bh=1G+ipRs7pgz7bJ2z7NpkuXE7ZP+//KrWIZf7kvrXY7o=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=E8y8vJUYbNzpPOosMnWfNGWIq0UkjkpzQ22LDDVk585OnanRNDDFCP4VBWQ7DmAToXOHa7Ond73hreuOO20YyVwJCEt/ZQF48fQnsPOJ5+yEifyrnvwrCehBei9stWZ/6y+577dk45vTkBSEXXLtOlSMt2lBnZ6tPX9ZFon18Wk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=N3vI6Fd9; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="N3vI6Fd9" Received: from [192.168.88.20] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id A8D9B63B; Thu, 26 Jun 2025 17:22:37 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1750951358; bh=1G+ipRs7pgz7bJ2z7NpkuXE7ZP+//KrWIZf7kvrXY7o=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=N3vI6Fd9Ds3ZDPn3hykRfdbTjdRPZw61gr6JHmATVOPIJoTEp0XqvYW0uRcBY5TmR hAc499USZF67gJxkabl7Z9ZIB8TEHRck4MQ5M8RP2+WI5Fyh6qUplBfnepzE5/5dBU rEGz/cJ2B5rhalK2rmWgqiNuW7hBzQ+Q5a2umUD0= Message-ID: <02b301f8-267e-4c65-bdea-b96c83c88bcd@ideasonboard.com> Date: Thu, 26 Jun 2025 18:22:53 +0300 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 06/13] media: v4l2-subdev: Mark both streams of a route enabled To: Sakari Ailus , Laurent Pinchart Cc: linux-media@vger.kernel.org, bingbu.cao@linux.intel.com, stanislaw.gruszka@linux.intel.com, tian.shu.qiu@intel.com References: <20250619081546.1582969-1-sakari.ailus@linux.intel.com> <20250619081546.1582969-7-sakari.ailus@linux.intel.com> <20250619165604.GH32166@pendragon.ideasonboard.com> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 19/06/2025 21:34, Sakari Ailus wrote: > Hi Laurent, > > On Thu, Jun 19, 2025 at 07:56:04PM +0300, Laurent Pinchart wrote: >> Hi Sakari, >> >> Thank you for the patch. > > Thanks for the review. > >> >> On Thu, Jun 19, 2025 at 11:15:39AM +0300, Sakari Ailus wrote: >>> Streams are stored in sink-source pairs in sub-device state. >> >> Is it really this simple ? Don't we support for instance stream merging >> where two streams on possibly different sink pads are routed to a single >> stream on a source pad ? > > As far as I'm concerned, yes. Each route has a sink and a source pad, you > may have multiple routes from a pad or to a pad, but these are all separate > routes. The UAPI as well as v4l2-subdev.c is aligned with this and I > wouldn't expect it to be otherwise. But with stream merging/splitting we'll have one stream config on one pad, and two stream configs on the other. And thus two routes from that one config. That said, if I recall right, I don't think merging/splitting has ever been really explored... Tomi