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 61E8981219 for ; Tue, 19 Mar 2024 14:20:40 +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=1710858041; cv=none; b=Y08iq2Hem8tPlol55g7bvsvrbck9Uwu0qcVkxDOlyAL5aD6m0rMkKfT+frm5foLylI5a+Ha+oupMOmJ5fccfvJN296n+uEqlyKPrsGY9H4Y3mGVnVy06xTAu3IrEtc9doUIvoRZH2qgH8aB6VSbYKJtEhAsuvoyd+ZdaSwU2BYU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710858041; c=relaxed/simple; bh=ZzDlzbDxpwwUYfC1Hd0PR0zcg+C9ldZHhuRCzK9S5JY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Gh1LwIVIPxWAybbZY7FOMxrr0an3Ff5tQoIclG7IpeTGvK7te5EM7bk7GNyA2eJCNckIJDB+oH9bHJjHu55mqc7pMZGKZW9Q9mrkDaopbNZ/FgW9ZKONKtBPjbP7+JurZ6ouzs3PEKkF6JTY31GFhT/fFuImSso/XnYtx7U3yi0= ARC-Authentication-Results:i=1; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 19/03/2024 15:27, Sakari Ailus wrote: > Moi, > > On Thu, Mar 14, 2024 at 09:30:50AM +0200, Tomi Valkeinen wrote: >> On 13/03/2024 09:24, Sakari Ailus wrote: >>> Add generic serial metadata mbus formats. These formats describe data >>> width and packing but not the content itself. The reason for specifying >>> such formats is that the formats as such are fairly device specific but >>> they are still handled by CSI-2 receiver drivers that should not be aware >>> of device specific formats. What makes generic metadata formats possible >>> is that these formats are parsed by software only, after capturing the >>> data to system memory. >>> >>> Also add a definition for "Data unit" to cover what is essentially a pixel >>> but is not image data. >> >> The CCS spec talks about legacy packing and optimized packing for 16+ bit >> formats. You cover only the "legacy" ones here. Did you look at those? > > The reason is that the bus data layout of the new packing at higher bit > depth matches with packing at lower bit depths (half to be precise). That's > why there's no need to define formats for the new packing methods at higher > bit depths (the driver simply uses the packing at half of the bit depth). Hmm. If we're capturing 10-bit raw format, say, with the width of 640 pixels, we'll configure the video stream format according to those. For the embedded stream, we'll set it to V4L2_META_FMT_GENERIC_CSI2_10 and 640 width, right? If we're capturing 20-bit raw, we'll configure the video stream format again accordingly, width to 640, and 20 bit fourcc/mbus code. If the embedded stream uses the "legacy" packing, we'll set the format to V4L2_META_FMT_GENERIC_CSI2_20 with width of 640, right? But if it's using packed format for the embedded stream, we set the format to V4L2_META_FMT_GENERIC_CSI2_10 and width to 1280? Considering that the video and (line-based) embedded data come from the same source, I'd expect the widths to be the same. Tomi