From patchwork Mon Apr 14 07:35:22 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keke Li X-Patchwork-Id: 14049861 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9764D26656D; Mon, 14 Apr 2025 07:35:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744616125; cv=none; b=PooA5y3cNxlezizgo1HvGSR1HFsQFlvYt5yLaLrJ3YZWuRi2lQNX5R0eJfPbZ42Pg/nGqXOw/G/ePZ6NaAK7HsfgSjc/I1lGcMSjTqi4Ph4ejw0mZP+AYbDjF+mhmfx0oGu6Jru4GFvdq745hGXiStef8LPGAeSC1vtiHZgyw2U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744616125; c=relaxed/simple; bh=0MaAoHDr1CDVzxRbHnM4xxKoKnL4pRQuzw5J94sWokQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hU3+Ukg5RPenWavhC4qle6CZ/wme8BmGwjqhMbAio/PwkQdS1BbLTQV+XOxbEItpo/MZkKMsOvDonr0qC3B/S8NRa+7FxuS3vGiJXPyATWi/QwRY0eGdsXHBDOg0a2lMe618iGKSzLvOETBvp5zWyBCpoHU2/w0yMWKDcRIIm8Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O77euCSm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="O77euCSm" Received: by smtp.kernel.org (Postfix) with ESMTPS id 341BDC4CEEB; Mon, 14 Apr 2025 07:35:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744616125; bh=0MaAoHDr1CDVzxRbHnM4xxKoKnL4pRQuzw5J94sWokQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=O77euCSmAREmhpoUAxKym+ZkaxPnLhh+0NYJ70gBFAoNJmCZUbO5W2+3JVVVzu3f2 99HtQznBa8oyjB88hKVzr7taYL/JNfy1DO22sWjU0s4wLSiWF63j0Tu3HEG3MWmP8F IuSNmoF5S3wjE51gVo4spPcfi73AXnYWkr9b1YRGt4qBDy1TWy5jnkLvZQkTQkZfYD 85h3QpBawHX+S39i9gzPfRTR5rl1SQV2o1B1+UtJrB8BYdiDuuNx9DmTNPkB6otz78 kqnuoNk2XsUeANKNXLl+tKsxcalsUTMrEJHFkot+wfIaqz2mgb61zHMRNpId/tbaq1 /6jMGGTy6AWcw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A2E5C369B4; Mon, 14 Apr 2025 07:35:25 +0000 (UTC) Date: Mon, 14 Apr 2025 15:35:22 +0800 Subject: [PATCH v8 09/10] Documentation: media: add documentation file metafmt-c3-isp.rst Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250414-c3isp-v8-9-9f89e537494e@amlogic.com> References: <20250414-c3isp-v8-0-9f89e537494e@amlogic.com> In-Reply-To: <20250414-c3isp-v8-0-9f89e537494e@amlogic.com> To: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kieran.bingham@ideasonboard.com, laurent.pinchart@ideasonboard.com, dan.scally@ideasonboard.com, jacopo.mondi@ideasonboard.com, Keke Li X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1744616122; l=5017; i=keke.li@amlogic.com; s=20240902; h=from:subject:message-id; bh=Y2xAhnVamQXsHOplTghUW7N4TKJYgc8KO7h0VyNU8Ic=; b=iwduCRUzo7fqoPvWhuk7EjV3FgGZay5Kg4gJBntN91ZU8UKitULf6/7Ih78ZgwWNmG2ZXsDmP 5jsfwPahesNCNQb5UZaTJSEP8n1bPKU+vaRMxCG851WwU6/tqeTSlmf X-Developer-Key: i=keke.li@amlogic.com; a=ed25519; pk=XxNPTsQ0YqMJLLekV456eoKV5gbSlxnViB1k1DhfRmU= X-Endpoint-Received: by B4 Relay for keke.li@amlogic.com/20240902 with auth_id=204 X-Original-From: Keke Li Reply-To: keke.li@amlogic.com From: Keke Li From: Keke Li Add the file 'metafmt-c3-isp.rst' that documents the meta format of c3-isp. Reviewed-by: Jacopo Mondi Signed-off-by: Keke Li --- .../userspace-api/media/v4l/meta-formats.rst | 1 + .../userspace-api/media/v4l/metafmt-c3-isp.rst | 86 ++++++++++++++++++++++ MAINTAINERS | 1 + 3 files changed, 88 insertions(+) diff --git a/Documentation/userspace-api/media/v4l/meta-formats.rst b/Documentation/userspace-api/media/v4l/meta-formats.rst index 86ffb3bc8ade..bb6876cfc271 100644 --- a/Documentation/userspace-api/media/v4l/meta-formats.rst +++ b/Documentation/userspace-api/media/v4l/meta-formats.rst @@ -12,6 +12,7 @@ These formats are used for the :ref:`metadata` interface only. .. toctree:: :maxdepth: 1 + metafmt-c3-isp metafmt-d4xx metafmt-generic metafmt-intel-ipu3 diff --git a/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst b/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst new file mode 100644 index 000000000000..449b45c2ec24 --- /dev/null +++ b/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst @@ -0,0 +1,86 @@ +.. SPDX-License-Identifier: (GPL-2.0-only OR MIT) + +.. _v4l2-meta-fmt-c3isp-stats: +.. _v4l2-meta-fmt-c3isp-params: + +*********************************************************************** +V4L2_META_FMT_C3ISP_STATS ('C3ST'), V4L2_META_FMT_C3ISP_PARAMS ('C3PM') +*********************************************************************** + +.. c3_isp_stats_info + +3A Statistics +============= + +The C3 ISP can collect different statistics over an input Bayer frame. +Those statistics are obtained from the "c3-isp-stats" metadata capture video nodes, +using the :c:type:`v4l2_meta_format` interface. +They are formatted as described by the :c:type:`c3_isp_stats_info` structure. + +The statistics collected are Auto-white balance, +Auto-exposure and Auto-focus information. + +.. c3_isp_params_cfg + +Configuration Parameters +======================== + +The configuration parameters are passed to the c3-isp-params metadata output video node, +using the :c:type:`v4l2_meta_format` interface. Rather than a single struct containing +sub-structs for each configurable area of the ISP, parameters for the C3-ISP +are defined as distinct structs or "blocks" which may be added to the data +member of :c:type:`c3_isp_params_cfg`. Userspace is responsible for +populating the data member with the blocks that need to be configured by the driver, but +need not populate it with **all** the blocks, or indeed with any at all if there +are no configuration changes to make. Populated blocks **must** be consecutive +in the buffer. To assist both userspace and the driver in identifying the +blocks each block-specific struct embeds +:c:type:`c3_isp_params_block_header` as its first member and userspace +must populate the type member with a value from +:c:type:`c3_isp_params_block_type`. Once the blocks have been populated +into the data buffer, the combined size of all populated blocks shall be set in +the data_size member of :c:type:`c3_isp_params_cfg`. For example: + +.. code-block:: c + + struct c3_isp_params_cfg *params = + (struct c3_isp_params_cfg *)buffer; + + params->version = C3_ISP_PARAM_BUFFER_V0; + params->data_size = 0; + + void *data = (void *)params->data; + + struct c3_isp_params_awb_gains *gains = + (struct c3_isp_params_awb_gains *)data; + + gains->header.type = C3_ISP_PARAMS_BLOCK_AWB_GAINS; + gains->header.flags = C3_ISP_PARAMS_BLOCK_FL_ENABLE; + gains->header.size = sizeof(struct c3_isp_params_awb_gains); + + gains->gr_gain = 256; + gains->r_gain = 256; + gains->b_gain = 256; + gains->gb_gain = 256; + + data += sizeof(struct c3_isp__params_awb_gains); + params->data_size += sizeof(struct c3_isp_params_awb_gains); + + struct c3_isp_params_awb_config *awb_cfg = + (struct c3_isp_params_awb_config *)data; + + awb_cfg->header.type = C3_ISP_PARAMS_BLOCK_AWB_CONFIG; + awb_cfg->header.flags = C3_ISP_PARAMS_BLOCK_FL_ENABLE; + awb_cfg->header.size = sizeof(struct c3_isp_params_awb_config); + + awb_cfg->tap_point = C3_ISP_AWB_STATS_TAP_BEFORE_WB; + awb_cfg->satur = 1; + awb_cfg->horiz_zones_num = 32; + awb_cfg->vert_zones_num = 24; + + params->data_size += sizeof(struct c3_isp_params_awb_config); + +Amlogic C3 ISP uAPI data types +=============================== + +.. kernel-doc:: include/uapi/linux/media/amlogic/c3-isp-config.h diff --git a/MAINTAINERS b/MAINTAINERS index f2dbd348b6bb..b2bf9c6cd194 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1260,6 +1260,7 @@ M: Keke Li L: linux-media@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/media/amlogic,c3-isp.yaml +F: Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst F: drivers/media/platform/amlogic/c3/isp/ F: include/uapi/linux/media/amlogic/