From patchwork Fri Dec 20 13:24:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 852677 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (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 4E0A6215F5D for ; Fri, 20 Dec 2024 13:24:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734701092; cv=none; b=I0vUO0v0bJCUKX4NBJPvxoczsbb2sm1ButgjH83NYJMHF78toMJO8z/pzJoBcaaHW5JIhFn4i6N+5E4OUIqG5ivvaehhTKRWVf9ICF7n1vuvLjbTEnDSxXlLHjBdeWMjNpWxUhABcgw9I5qqqT6PW8FiDT4GC8ETY2TdD5mTWKQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734701092; c=relaxed/simple; bh=EqS8HsotZO5ElRikzcpalqye+HQyEZNIAk/pAvJ7Qb8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mCgKNadhQTEpOPJIGGWc30kL0UsfobGOBbzrcVSZpBrMcmmUdUaLuJkW4cOX2DKwwIX/7hxc6HWef49K69/LL9GudARg5ekTbjhbe+sSG9CuA/AAxEqBixTXf6sIHt/UhuOjQdlznEngzhIRx3Qcl+pdKT3gNicl9TCfB+JJ//Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=mstwKA6P; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="mstwKA6P" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1734701091; x=1766237091; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=EqS8HsotZO5ElRikzcpalqye+HQyEZNIAk/pAvJ7Qb8=; b=mstwKA6Pmox4z31LNu/UVbIZd+WdkVlAO7UukZ2Zre085MsglZCxpJSh QZbGAU7d9uQNrBdPUbaJR+kfz+A3NK//7FbAZFNxq3z9382DjBjzfcS9k F1itC0TDnRL4un14e1K0XsOop23N9yFtj9kwrjB7KEwqbG826G6ld/Gm2 Ib3MoOyS46j6iYBaGwEFBBsYznrt4wxNV8gioM2cb79X4n2z5zDTrpdUC D8dyu9uCPGLsscWcBm8kl8Z7C+U51JyG1sWGylhlWFKzrEInxg9oLqrh/ 6E7S5NYEfYFNPVp1LfXr0R0rcykDqTlyQ0F8XveAId0r849Yp//9WB2jX w==; X-CSE-ConnectionGUID: GNwkHudCQPuBiGj43COLmg== X-CSE-MsgGUID: 1sk2vSKyTnq6LoeOdqYf/g== X-IronPort-AV: E=McAfee;i="6700,10204,11292"; a="45937612" X-IronPort-AV: E=Sophos;i="6.12,250,1728975600"; d="scan'208";a="45937612" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2024 05:24:51 -0800 X-CSE-ConnectionGUID: jj7oxGHJSi26vORCbE1Qrg== X-CSE-MsgGUID: iq2NlmfPRK+ugVmfPb8GVg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,250,1728975600"; d="scan'208";a="98333276" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Dec 2024 05:24:44 -0800 Received: from svinhufvud.intel.com (maa-artisokka.localdomain [192.168.240.50]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 2FEEC11FADB; Fri, 20 Dec 2024 15:24:39 +0200 (EET) Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo From: Sakari Ailus To: linux-media@vger.kernel.org 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 , Mirela Rabulea , =?utf-8?q?Andr=C3=A9_Apitzsch?= , Heimir Thor Sverrisson , Kieran Bingham , Stanislaw Gruszka , Mehdi Djait , Ricardo Ribalda Delgado Subject: [RFC v4 5/9] media: Documentation: Add scaling and post-scaler crop for common raw Date: Fri, 20 Dec 2024 15:24:15 +0200 Message-Id: <20241220132419.1027206-6-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241220132419.1027206-1-sakari.ailus@linux.intel.com> References: <20241220132419.1027206-1-sakari.ailus@linux.intel.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Document scaling and post-scaler digital crop operations for the common raw sensor model. Signedg-off-by: Sakari Ailus --- .../media/v4l/subdev-config-model.rst | 24 +++++++++++++++---- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/Documentation/userspace-api/media/v4l/subdev-config-model.rst b/Documentation/userspace-api/media/v4l/subdev-config-model.rst index b0bd09772ceb..f15e5495cc34 100644 --- a/Documentation/userspace-api/media/v4l/subdev-config-model.rst +++ b/Documentation/userspace-api/media/v4l/subdev-config-model.rst @@ -118,11 +118,18 @@ sub-sampling to achieve the desired size. The digital crop operation takes place after binning and sub-sampling. It is configured by setting the ``V4L2_SEL_TGT_CROP`` rectangle on (pad, stream) pair -0/0. The resulting image size is further output by the sensor. +0/0. + +The scaling operation is performed after the digital crop. It is configured by +setting the ``V4L2_SEL_TGT_COMPOSE`` rectangle on (pad, stream) pair 0/0, +relative to the digital crop. The sensor's output mbus code is configured by setting the format on the (pad, -stream) pair 0/0. When setting the format, always use the same width and height -as for the digital crop setting. +stream) pair 0/0. The width and height fields are used to configure post-scaler +digital crop if supported by the driver, affecting the right and bottom edges of +the frame. If post-scaler digital crop is not supported, the width and height +fields of the format will match the compose rectangle sizes applied on the same +0/0 (pad, stream) pair. Drivers may only support some of even none of these configurations, in which case they do not expose the corresponding selection rectangles. If any selection @@ -180,12 +187,19 @@ Also refer to :ref:`Selection targets `. - X - Digital crop. This rectangle is relative to the ``V4L2_SEL_TGT_COMPOSE`` rectangle on (pad, stream) pair 1/0. + * - 0/0 + - ``V4L2_SEL_TGT_COMPOSE`` + - \- + - X + - Scaling. This rectangle is relative to the ``V4L2_SEL_TGT_CROP`` + rectangle on (pad, stream) pair 0/0. * - 0/0 - Format - X - X - - Image data source format. Always assign the width and height fields of - the format to the same values than for the ``V4L2_SEL_TGT_CROP`` + - Image data source format and post-scaler crop. The width and height + fields of the format, used to configure post-scaler crop on the right + and bottom edges of the image, are related to the ``V4L2_SEL_TGT_COMPOSE`` rectangle on (pad, stream) pair 0/0. The media bus code reflects the pixel data output of the sensor. * - 0/1