[PATCH v11 08/19] media: uapi: Add controls for Mali-C55 ISP
From: Daniel Scally <dan.scally@ideasonboard.com>
Date: 2025-07-14 15:07:02
Also in:
linux-arm-kernel, linux-media
Subsystem:
arm mali-c55 isp driver, media input infrastructure (v4l/dvb), the rest · Maintainers:
Daniel Scally, Jacopo Mondi, Mauro Carvalho Chehab, Linus Torvalds
Add definitions and documentation for the custom control that will be needed by the Mali-C55 ISP driver. This will be a read only bitmask of the driver's capabilities, informing userspace of which blocks are fitted and which are absent. Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com> --- Changes in v11: - Reserve 16 controls in line with other drivers Changes in v10: - None Changes in v9: - New patch --- .../userspace-api/media/drivers/index.rst | 1 + .../userspace-api/media/drivers/mali-c55.rst | 55 ++++++++++++++++++++++ include/uapi/linux/media/arm/mali-c55-config.h | 26 ++++++++++ include/uapi/linux/v4l2-controls.h | 6 +++ 4 files changed, 88 insertions(+)
diff --git a/Documentation/userspace-api/media/drivers/index.rst b/Documentation/userspace-api/media/drivers/index.rst
index d706cb47b1122b6e145a02ab826eb3ecc7997c2b..02967c9b18d6e90f414ccc1329c09bffee895e68 100644
--- a/Documentation/userspace-api/media/drivers/index.rst
+++ b/Documentation/userspace-api/media/drivers/index.rst@@ -32,6 +32,7 @@ For more details see the file COPYING in the source distribution of Linux. cx2341x-uapi dw100 imx-uapi + mali-c55 max2175 npcm-video omap3isp-uapi
diff --git a/Documentation/userspace-api/media/drivers/mali-c55.rst b/Documentation/userspace-api/media/drivers/mali-c55.rst
new file mode 100644
index 0000000000000000000000000000000000000000..e8519da77d737b91a931bbe47920af707eebf110
--- /dev/null
+++ b/Documentation/userspace-api/media/drivers/mali-c55.rst@@ -0,0 +1,55 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +Arm Mali-C55 ISP driver +======================= + +The Arm Mali-C55 ISP driver implements a single driver-specific control: + +``V4L2_CID_MALI_C55_CAPABILITIES`` + Detail the capabilities of the ISP by giving detail about the fitted blocks. + + .. flat-table:: Bitmask meaning definitions + :header-rows: 1 + :widths: 2 4 8 + + * - Bit + - Macro + - Meaning + * - 0 + - MALI_C55_GPS_PONG_FITTED + - Pong configuration space is fitted in the ISP + * - 1 + - MALI_C55_GPS_WDR_FITTED + - WDR Framestitch, offset and gain is fitted in the ISP + * - 2 + - MALI_C55_GPS_COMPRESSION_FITTED + - Temper compression is fitted in the ISP + * - 3 + - MALI_C55_GPS_TEMPER_FITTED + - Temper is fitted in the ISP + * - 4 + - MALI_C55_GPS_SINTER_LITE_FITTED + - Sinter Lite is fitted in the ISP instead of the full Sinter version + * - 5 + - MALI_C55_GPS_SINTER_FITTED + - Sinter is fitted in the ISP + * - 6 + - MALI_C55_GPS_IRIDIX_LTM_FITTED + - Iridix local tone mappine is fitted in the ISP + * - 7 + - MALI_C55_GPS_IRIDIX_GTM_FITTED + - Iridix global tone mapping is fitted in the ISP + * - 8 + - MALI_C55_GPS_CNR_FITTED + - Colour noise reduction is fitted in the ISP + * - 9 + - MALI_C55_GPS_FRSCALER_FITTED + - The full resolution pipe scaler is fitted in the ISP + * - 10 + - MALI_C55_GPS_DS_PIPE_FITTED + - The downscale pipe is fitted in the ISP + + The Mali-C55 ISP can be configured in a number of ways to include or exclude + blocks which may not be necessary. This control provides a way for the + driver to communicate to userspace which of the blocks are fitted in the + design.
\ No newline at end of file
diff --git a/include/uapi/linux/media/arm/mali-c55-config.h b/include/uapi/linux/media/arm/mali-c55-config.h
new file mode 100644
index 0000000000000000000000000000000000000000..2bd60a0d78786be368c2e51b1a0a63fd2a5f690b
--- /dev/null
+++ b/include/uapi/linux/media/arm/mali-c55-config.h@@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * ARM Mali-C55 ISP Driver - Userspace API + * + * Copyright (C) 2023 Ideas on Board Oy + */ + +#ifndef __UAPI_MALI_C55_CONFIG_H +#define __UAPI_MALI_C55_CONFIG_H + +#include <linux/v4l2-controls.h> + +#define V4L2_CID_MALI_C55_CAPABILITIES (V4L2_CID_USER_MALI_C55_BASE + 0x0) +#define MALI_C55_GPS_PONG_FITTED BIT(0) +#define MALI_C55_GPS_WDR_FITTED BIT(1) +#define MALI_C55_GPS_COMPRESSION_FITTED BIT(2) +#define MALI_C55_GPS_TEMPER_FITTED BIT(3) +#define MALI_C55_GPS_SINTER_LITE_FITTED BIT(4) +#define MALI_C55_GPS_SINTER_FITTED BIT(5) +#define MALI_C55_GPS_IRIDIX_LTM_FITTED BIT(6) +#define MALI_C55_GPS_IRIDIX_GTM_FITTED BIT(7) +#define MALI_C55_GPS_CNR_FITTED BIT(8) +#define MALI_C55_GPS_FRSCALER_FITTED BIT(9) +#define MALI_C55_GPS_DS_PIPE_FITTED BIT(10) + +#endif /* __UAPI_MALI_C55_CONFIG_H */
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index f836512e9debbc65d62a9fe04069b056be42f7b2..9f07d80d7af1dfb347fca6e2c65b25bc2cb86af1 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h@@ -228,6 +228,12 @@ enum v4l2_colorfx { */ #define V4L2_CID_USER_RKISP1_BASE (V4L2_CID_USER_BASE + 0x1220) +/* + * The base for the Arm Mali-C55 ISP driver controls. + * We reserve 8 controls for this driver + */ +#define V4L2_CID_USER_MALI_C55_BASE (V4L2_CID_USER_BASE + 0x1230) + /* MPEG-class control IDs */ /* The MPEG controls are applicable to all codec controls * and the 'MPEG' part of the define is historical */
--
2.34.1