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Received: from AS4PR04MB9244.eurprd04.prod.outlook.com (2603:10a6:20b:4e3::9) by DBBPR04MB7578.eurprd04.prod.outlook.com (2603:10a6:10:208::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8489.19; Wed, 26 Feb 2025 09:17:47 +0000 Received: from AS4PR04MB9244.eurprd04.prod.outlook.com ([fe80::7303:2cc8:d109:d7c1]) by AS4PR04MB9244.eurprd04.prod.outlook.com ([fe80::7303:2cc8:d109:d7c1%3]) with mapi id 15.20.8466.016; Wed, 26 Feb 2025 09:17:47 +0000 Message-ID: Date: Wed, 26 Feb 2025 11:17:43 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [RFC v5 04/15] media: Documentation: Add subdev configuration models, raw sensor model From: Mirela Rabulea To: Sakari Ailus , linux-media@vger.kernel.org, Julien Vuillaumier Cc: hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, Prabhakar , Kate Hsuan , Alexander Shiyan , Mikhail Rudenko , Dave Stevenson , Tommaso Merciai , Umang Jain , Benjamin Mugnier , Sylvain Petinot , Christophe JAILLET , Julien Massot , Naushir Patuck , "Yan, Dongcheng" , "Cao, Bingbu" , "Qiu, Tian Shu" , "Wang, Hongju" , Stefan Klug , =?UTF-8?Q?Andr=C3=A9_Apitzsch?= , Heimir Thor Sverrisson , Kieran Bingham , Stanislaw Gruszka , Mehdi Djait , Ricardo Ribalda Delgado , Hans de Goede References: <20250203085853.1361401-1-sakari.ailus@linux.intel.com> <20250203085853.1361401-5-sakari.ailus@linux.intel.com> <89f75abe-6db9-4cb7-ae51-7eeb6fc0600b@nxp.com> Content-Language: en-US In-Reply-To: <89f75abe-6db9-4cb7-ae51-7eeb6fc0600b@nxp.com> Content-Type: text/plain; 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Not all of the interfaces are >> +necessarily offered by all drivers. >> + >> +A sub-device complies with the common raw sensor model if the >> +``V4L2_CONFIG_MODEL_COMMON_RAW`` bit is set in the >> ``V4L2_CID_CONFIG_MODEL`` >> +control of the sub-device. >> + >> +The common raw camera sensor model is aligned with >> +:ref:`media_using_camera_sensor_drivers`. Please refer to that >> regarding aspects >> +not specified here. >> + >> +Each camera sensor implementing the common raw sensor model exposes >> a single >> +V4L2 sub-device. The sub-device contains a single source pad (0) and >> two or more >> +internal pads: an image data internal pad (1) and optionally an >> embedded data >> +pad (2). Additionally, further internal pads may be supported for other >> +features, in which case they are documented separately for the given >> device. One more question here, to be sure I understand correctly. So, in order to be compliant with the common raw camera sensor model, in case a raw sensor will need more than 2 internal pads, the expectation is to keep image on pad 0, edata on pad 1, and add more needed pads? Or is it acceptable that a driver completely changes the pad numbering according to it's needs, as long as it is documented? The case I am targeting is os08a20 hdr sensor, with: pad1-image long exposure, pad2-edata, pad3-image short exposure. So far, so good, I guess. I don't know if there will be such a case for a sensor driver which does not support embedded data, but will need to support other internal pads, and in such a case, how should pad numbering look like? Thanks, Mirela