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 A6EEDF9DF; Tue, 2 Apr 2024 06:00:55 +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=1712037657; cv=none; b=NQJbq6lpwpN2eP79bk2kqU5yjw/u4SlVTtRRhntE49fZRSBP7UhDlDyhYmliD/ydr13y2YjC3/mJlZlKtZl0PGo6ILPBMnEHV0aF/SuI4MtQC6gtIAOBxCL4yflo+rHJrEE6wk7HEs6ouMCtHDvJ6d0NG7QHTDfEII9ANwxmlzc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712037657; c=relaxed/simple; bh=QPsfQqD3zVA0DVbdMDrQrj+9Pw6co2Xu+3BXa3i5rmw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=GmrbEvJ9zLzu1pQWDFCar6AjjxqZjEMC0xKYO/+Q9GnK1cI2VvAp4JJdN8B8T6IEnb/BmjB5Sbo80a1ZXrOnC/NKlxqWZpPeCQNdmaocoYqpxW8GwnAjKxufxvbLmPBfSk4WlW7wHb9WQm6BkAzP56mpxt5Hs0PK51X4oppfLaI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (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=dHQlGe1S; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (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="dHQlGe1S" Received: from [192.168.88.20] (91-154-34-181.elisa-laajakaista.fi [91.154.34.181]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id F3CC7C55; Tue, 2 Apr 2024 08:00:09 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1712037610; bh=QPsfQqD3zVA0DVbdMDrQrj+9Pw6co2Xu+3BXa3i5rmw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=dHQlGe1SyF44gW0nvP2AysxaESEYKSuVu+IbFxkdSpPQD2wDfDLMmvz4VvK1t1POo B8QI9C+DOmo3dYFkgQ7rWARmAHp/TN9qcC4sgogVhOm42BW4YX/pEf4IJKbAKQkl6l zP+mIA7HB9gfWdqHueeLaboDsK8y8hNJrwvYCoNs= Message-ID: Date: Tue, 2 Apr 2024 09:00:43 +0300 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 09/15] media: bcm2835-unicam: Add support for CCP2/CSI2 camera interface To: Laurent Pinchart Cc: linux-media@vger.kernel.org, Dave Stevenson , David Plowman , Jean-Michel Hautbois , Hans Verkuil , Naushir Patuck , Sakari Ailus , kernel-list@raspberrypi.com, linux-rpi-kernel@lists.infradead.org, Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, Conor Dooley , Krzysztof Kozlowski , Rob Herring , devicetree@vger.kernel.org References: <20240324220854.15010-1-laurent.pinchart@ideasonboard.com> <20240324220854.15010-10-laurent.pinchart@ideasonboard.com> <20240401135216.GF8623@pendragon.ideasonboard.com> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01/04/2024 16:52, Laurent Pinchart wrote: > On Wed, Mar 27, 2024 at 01:21:09PM +0200, Tomi Valkeinen wrote: >> On 25/03/2024 00:08, Laurent Pinchart wrote: >>> From: Dave Stevenson >>> >>> Add a driver for the Unicam camera receiver block on BCM283x processors. >>> It is represented as two video device nodes: unicam-image and >>> unicam-embedded which are connected to an internal subdev (named >>> unicam-subdev) in order to manage streams routing. >> >> Shouldn't this driver call get_frame_desc somewhere to get the VC and DT >> for the streams? > > Generally speaking, yes. In practice, configuring the DT from the frame > descriptor is probably not very useful, as CSI-2 sources that transmit > image data using a DT that doesn't correspond to the media bus code are > not very common and I don't expect this to be needed for unicam. Perhaps, but if the driver gets the DT from the frame descriptor, then the driver doesn't need to have tables for the DTs. Although when I did this with the RPi CFE driver, I also implemented a fallback mechanism for the cases when there is no get_frame_desc, and so I still had to keep the DT tables... Tomi