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Tue, 3 May 2022 09:39:50 +0000 From: Xavier Roumegue To: mchehab@kernel.org, hverkuil-cisco@xs4all.nl, stanimir.varbanov@linaro.org, laurent.pinchart@ideasonboard.com, tomi.valkeinen@ideasonboard.com, robh+dt@kernel.org, nicolas@ndufresne.ca, alexander.stein@ew.tq-group.com Cc: Xavier Roumegue , linux-media@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 6/9] media: uapi: Add a control for DW100 driver Date: Tue, 3 May 2022 11:39:22 +0200 Message-Id: <20220503093925.876640-7-xavier.roumegue@oss.nxp.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220503093925.876640-1-xavier.roumegue@oss.nxp.com> References: <20220503093925.876640-1-xavier.roumegue@oss.nxp.com> X-ClientProxiedBy: PR0P264CA0111.FRAP264.PROD.OUTLOOK.COM (2603:10a6:100:19::27) To AM9PR04MB8700.eurprd04.prod.outlook.com (2603:10a6:20b:43f::8) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: eed1a3d9-d6e5-45bf-c53b-08da2ce8deb9 X-MS-TrafficTypeDiagnostic: VI1PR0401MB2559:EE_ X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The blob format is hardware specific so create a dedicated control for this purpose. Signed-off-by: Xavier Roumegue --- .../userspace-api/media/drivers/dw100.rst | 13 +++++++++++++ include/uapi/linux/dw100.h | 14 ++++++++++++++ 2 files changed, 27 insertions(+) create mode 100644 include/uapi/linux/dw100.h diff --git a/Documentation/userspace-api/media/drivers/dw100.rst b/Documentation/userspace-api/media/drivers/dw100.rst index 1e606459cf47..1ea727698ea1 100644 --- a/Documentation/userspace-api/media/drivers/dw100.rst +++ b/Documentation/userspace-api/media/drivers/dw100.rst @@ -87,4 +87,17 @@ an identity map. More details on the DW100 hardware operations can be found in *chapter 13.15 DeWarp* of IMX8MP_ reference manual. +The Vivante DW100 m2m driver implements the following driver-specific control: + +``V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP (__u32 array)`` + Specifies to DW100 driver its dewarping map (aka LUT) blob as described in + *chapter 13.15.2.3 Dewarping Remap* of IMX8MP_ reference manual as an U32 + dynamic array. The image is divided into many small 16x16 blocks. If the + width/height of the image is not divisible by 16, the size of the + rightmost/bottommost block is the remainder. The dewarping map only saves + the vertex coordinates of the block. The dewarping grid map is comprised of + vertex coordinates for x and y. Each x, y coordinate register uses 16 bits + (UQ12.4) to record the coordinate address, with the Y coordinate in the + upper bits and X in the lower bits. + .. _IMX8MP: https://www.nxp.com/webapp/Download?colCode=IMX8MPRM diff --git a/include/uapi/linux/dw100.h b/include/uapi/linux/dw100.h new file mode 100644 index 000000000000..3356496edd6b --- /dev/null +++ b/include/uapi/linux/dw100.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */ +/* Copyright 2022 NXP */ + +#ifndef __UAPI_DW100_H__ +#define __UAPI_DW100_H__ + +#include + +/* + * Check Documentation/userspace-api/media/drivers/dw100.rst for control details. + */ +#define V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP (V4L2_CID_USER_DW100_BASE + 1) + +#endif