From nobody Thu Dec 18 09:44:03 2025 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 897CA1D90AE; Thu, 5 Dec 2024 09:04:34 +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=1733389474; cv=none; b=jBPckLelqJgRK1yC9+/3LGGt4R7GX9+AT/ypTnzUzbY67rW8yQ2KsUsRaqYxtz8ppsEBX4bpbb/3PsYcrN81/ZVsBpxfdBk6sTH1eJ/ufxbTMfvGuyjkK+OKccTZ01eqW+sFMH9vhgj9k7WKe03GXEUk7qc/oyjkoF8ia4sye78= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733389474; c=relaxed/simple; bh=Y4LNlQgDRkGGH3pRrF3lfzWftBYE8JNVFkZvolfRl54=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=FvXxD/liwz5PvI/AHaMJkg3P/OUn0QFSg/MLjg9OiItPM93+VZX049Y63yGRKbE2y/079iEosivdnrHnXymlnW0zAx2NKZtbqFhDx0r0RAGpRNhN6kFd71H2PSDVoDxFLu6SbukH5JmGRewds8K9Y2K9o2W8v1V5xCCKwTxszFU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GFlPnn/L; 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="GFlPnn/L" Received: by smtp.kernel.org (Postfix) with ESMTPS id 66FB2C113D0; Thu, 5 Dec 2024 09:04:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733389474; bh=Y4LNlQgDRkGGH3pRrF3lfzWftBYE8JNVFkZvolfRl54=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=GFlPnn/LHO3LDYsXqxA1Dsy8maigvTmEUNLEOepExj8Eub5WSKG5QW7p67T+o2Dy3 B0gbuA+WTbvkweyuuAbI0cQ+Stp1E8P8N86odMUrM6NvrlfMYCeq8YEXG/xe/q+GQk yr4lV0p70helrS1LkT3zxTf+DlXAdTvDVDe7TbN9kcJZof7Arr45YcZz/rRJrnE1RM wPVNrRwIeUgMASLF8ZCR3Q86ctUNsOqFAXp96uc+L/Aqq5ZwR5Im0XloU+3ipSDrgC +Cq6SEKVXJj79RhBwYVjmfNBLe7W6vFJV8zL0gN+hAK2+wEdLjJKnvg4uvXfVjAAyY KryCLY4xVF7AA== 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 5CD03E77171; Thu, 5 Dec 2024 09:04:34 +0000 (UTC) From: Keke Li via B4 Relay Date: Thu, 05 Dec 2024 17:04:35 +0800 Subject: [PATCH v4 09/10] Documentation: media: add documentation file metafmt-c3-isp.rst Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241205-c3isp-v4-9-cb1868be0105@amlogic.com> References: <20241205-c3isp-v4-0-cb1868be0105@amlogic.com> In-Reply-To: <20241205-c3isp-v4-0-cb1868be0105@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, Keke Li X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733389471; l=4461; i=keke.li@amlogic.com; s=20240902; h=from:subject:message-id; bh=cycv5nQxMqObTEo6l1J/pT4F4f5SqpgiP9i/foLEh0s=; b=PUiHf2Z8Y6PSnV9Y6KLZ11x2uRzmPwWcor9LG2uBmg30hZ7mzsw/DQ5wJy97q3/18ueaAd/gw Nspi0ymBqWnBMRoLYT+r9DBenPUXSlAUiRscaLCMo7DfWTuD06HdVvH 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 Add the file 'metafmt-c3-isp.rst' that documents the meta format of c3-isp. Signed-off-by: Keke Li --- .../userspace-api/media/v4l/meta-formats.rst | 1 + .../userspace-api/media/v4l/metafmt-c3-isp.rst | 86 ++++++++++++++++++= ++++ 2 files changed, 87 insertions(+) diff --git a/Documentation/userspace-api/media/v4l/meta-formats.rst b/Docum= entation/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 =20 + metafmt-c3-isp metafmt-d4xx metafmt-generic metafmt-intel-ipu3 diff --git a/Documentation/userspace-api/media/v4l/metafmt-c3-isp.rst b/Doc= umentation/userspace-api/media/v4l/metafmt-c3-isp.rst new file mode 100644 index 000000000000..8a025900d3fd --- /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 ('CSTS'), V4L2_META_FMT_C3ISP_PARAMS ('CPRM') +*********************************************************************** + +.. c3_isp_stats_buffer + +3A Statistics +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +The C3 ISP can collect different statistics over an input Bayer frame. +Those statistics are obtained from the "c3-isp-stats" metadata capture vid= eo nodes, +using the :c:type:`v4l2_meta_format` interface. +They are formatted as described by the :c:type:`c3_isp_stats_buffer` struc= ture. + +The statistics collected are Auto-white balance, +Auto-exposure and Auto-focus information. + +.. c3_isp_params_cfg + +Configuration Parameters +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +The configuration parameters are passed to the c3-isp-params metadata outp= ut video node, +using the :c:type:`v4l2_meta_format` interface. Rather than a single struc= t containing +sub-structs for each configurable area of the ISP, parameters for the C3-I= SP +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 t= he 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 consecu= tive +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 s= et in +the data_size member of :c:type:`c3_isp_params_cfg`. For example: + +.. code-block:: c + + struct c3_isp_params_cfg *params =3D + (struct c3_isp_params_cfg *)buffer; + + params->version =3D C3_ISP_PARAM_BUFFER_V0; + params->data_size =3D 0; + + void *data =3D (void *)params->data; + + struct c3_isp_params_awb_gains *gains =3D + (struct c3_isp_params_awb_gains *)data; + + gains->header.type =3D C3_ISP_PARAMS_BLOCK_AWB_GAINS; + gains->header.flags =3D C3_ISP_PARAMS_BLOCK_FL_NONE; + gains->header.size =3D sizeof(struct c3_isp_params_awb_gains); + + gains->gr_gain =3D 256; + gains->r_gain =3D 256; + gains->b_gain =3D 256; + gains->gb_gain =3D 256; + + data +=3D sizeof(struct c3_isp__params_awb_gains); + params->data_size +=3D sizeof(struct c3_isp_params_awb_gains); + + struct c3_isp_params_awb_config *awb_cfg =3D + (struct c3_isp_params_awb_config *)data; + + awb_cfg->header.type =3D C3_ISP_PARAMS_BLOCK_AWB_CONFIG; + awb_cfg->header.flags =3D C3_ISP_PARAMS_BLOCK_FL_NONE; + awb_cfg->header.size =3D sizeof(struct c3_isp_params_awb_config); + + awb_cfg->tap_point =3D C3_ISP_AWB_STATS_TAP_BEFORE_WB; + awb_cfg->satur =3D 1; + awb_cfg->horiz_zones_num =3D 32; + awb_cfg->vert_zones_num =3D 24; + + params->data_size +=3D sizeof(struct c3_isp_params_awb_config); + +Amlogic C3 ISP uAPI data types +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D + +.. kernel-doc:: include/uapi/linux/media/amlogic/c3-isp-config.h --=20 2.47.0