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| author | Alain Volmat <alain.volmat@foss.st.com> | 2026-08-21 08:38:12 +0200 |
|---|---|---|
| committer | Hans Verkuil <hverkuil+cisco@kernel.org> | 2026-09-09 09:16:32 +0200 |
| commit | e31bd1eb17f927d067e40916abb17c4ce5f95ece (patch) | |
| tree | 6b85e0699b3a750b126f443f5e333da885bd1eca | |
| parent | a231ed57976e32d2f9c8d93904803023a65824e9 (diff) | |
| download | linux-next-e31bd1eb17f927d067e40916abb17c4ce5f95ece.tar.gz linux-next-e31bd1eb17f927d067e40916abb17c4ce5f95ece.zip | |
media: uapi: Add controls for ST DCMIPP Driver
Add definitions and documentation for the custom control provided
by the DCMIPP driver in order to control the pixelproc gamma
correction.
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
| -rw-r--r-- | Documentation/userspace-api/media/drivers/dcmipp.rst | 14 | ||||
| -rw-r--r-- | Documentation/userspace-api/media/drivers/index.rst | 1 | ||||
| -rw-r--r-- | include/uapi/linux/media/st/dcmipp_config.h | 16 | ||||
| -rw-r--r-- | include/uapi/linux/v4l2-controls.h | 6 |
4 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/drivers/dcmipp.rst b/Documentation/userspace-api/media/drivers/dcmipp.rst new file mode 100644 index 000000000000..ed4272da4b68 --- /dev/null +++ b/Documentation/userspace-api/media/drivers/dcmipp.rst @@ -0,0 +1,14 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +ST DCMIPP driver +================ + +The ST DCMIPP driver implements a driver specific control as part of its +pixelproc subdev. + +``V4L2_CID_DCMIPP_PIXELPROC_GAMMA_CORRECTION_ENABLE (boolean)`` + Enable / disable the gamma correction block. + + The DCMIPP PixelProc stage implements a gamma compression on each R, G, B + component, using a static gamma exponent 2.2. + The gamma is implemented as a 7-segment linear curve. diff --git a/Documentation/userspace-api/media/drivers/index.rst b/Documentation/userspace-api/media/drivers/index.rst index 02967c9b18d6..8d2c489b8453 100644 --- a/Documentation/userspace-api/media/drivers/index.rst +++ b/Documentation/userspace-api/media/drivers/index.rst @@ -30,6 +30,7 @@ For more details see the file COPYING in the source distribution of Linux. camera-sensor ccs cx2341x-uapi + dcmipp dw100 imx-uapi mali-c55 diff --git a/include/uapi/linux/media/st/dcmipp_config.h b/include/uapi/linux/media/st/dcmipp_config.h new file mode 100644 index 000000000000..ad8d146820ea --- /dev/null +++ b/include/uapi/linux/media/st/dcmipp_config.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * ST DCMIPP Driver - Userspace API + * + * Copyright (C) STMicroelectronics SA 2026 + */ + +#ifndef __UAPI_DCMIPP_CONFIG_H +#define __UAPI_DCMIPP_CONFIG_H + +#include <linux/types.h> +#include <linux/v4l2-controls.h> + +#define V4L2_CID_DCMIPP_PIXELPROC_GAMMA_CORRECTION_ENABLE (V4L2_CID_USER_DCMIPP_BASE + 0x0) + +#endif /* __UAPI_DCMIPP_CONFIG_H */ diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h index affec0ab4781..42b4f82afeb8 100644 --- a/include/uapi/linux/v4l2-controls.h +++ b/include/uapi/linux/v4l2-controls.h @@ -234,6 +234,12 @@ enum v4l2_colorfx { */ #define V4L2_CID_USER_MALI_C55_BASE (V4L2_CID_USER_BASE + 0x1230) +/* + * The base for the ST DCMIPP driver controls. + * We reserve 16 controls for this driver + */ +#define V4L2_CID_USER_DCMIPP_BASE (V4L2_CID_USER_BASE + 0x1240) + /* MPEG-class control IDs */ /* The MPEG controls are applicable to all codec controls * and the 'MPEG' part of the define is historical */ |