On Tue Jul 28 14:14:16 2026 +0800, Guoniu Zhou wrote: > The CSI pixel formatter is a module found on i.MX95 used to reformat > packet info, pixel and non-pixel data from CSI-2 host controller to > match Pixel Link(PL) definition. > > Add data formatting support. > > Signed-off-by: Guoniu Zhou <[email protected]> > Reviewed-by: Frank Li <[email protected]> > Reviewed-by: Loic Poulain <[email protected]> > Reviewed-by: Laurent Pinchart <[email protected]> > Signed-off-by: Frank Li <[email protected]> > Signed-off-by: Hans Verkuil <[email protected]>
Patch committed. Thanks, Hans Verkuil MAINTAINERS | 8 + drivers/media/platform/nxp/Kconfig | 16 + drivers/media/platform/nxp/Makefile | 1 + drivers/media/platform/nxp/imx95-csi-formatter.c | 758 +++++++++++++++++++++++ 4 files changed, 783 insertions(+) --- diff --git a/MAINTAINERS b/MAINTAINERS index a33b46da5fd3..baf4ca2c3928 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19739,6 +19739,14 @@ S: Maintained F: Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml F: drivers/media/platform/nxp/imx-jpeg +NXP i.MX 95 CSI PIXEL FORMATTER V4L2 DRIVER +M: Guoniu Zhou <[email protected]> +L: [email protected] +L: [email protected] +S: Maintained +F: Documentation/devicetree/bindings/media/fsl,imx95-csi-formatter.yaml +F: drivers/media/platform/nxp/imx95-csi-formatter.c + NXP i.MX CLOCK DRIVERS M: Abel Vesa <[email protected]> R: Peng Fan <[email protected]> diff --git a/drivers/media/platform/nxp/Kconfig b/drivers/media/platform/nxp/Kconfig index 40e3436669e2..5ff263fe7c6f 100644 --- a/drivers/media/platform/nxp/Kconfig +++ b/drivers/media/platform/nxp/Kconfig @@ -28,6 +28,22 @@ config VIDEO_IMX8MQ_MIPI_CSI2 Video4Linux2 driver for the MIPI CSI-2 receiver found on the i.MX8MQ SoC. +config VIDEO_IMX95_CSI_FORMATTER + tristate "NXP i.MX95 CSI Pixel Formatter driver" + depends on ARCH_MXC || COMPILE_TEST + depends on PM_CLK + depends on VIDEO_DEV + select MEDIA_CONTROLLER + select MFD_SYSCON + select V4L2_FWNODE + select VIDEO_V4L2_SUBDEV_API + help + This driver provides support for the CSI Pixel Formatter found on + i.MX95 series SoCs. This module unpacks the pixels received from the + CSI-2 interface and reformats them to meet pixel link requirements. + + Say Y here to enable CSI Pixel Formatter module for i.MX95 SoC. + config VIDEO_IMX_MIPI_CSIS tristate "NXP MIPI CSI-2 CSIS receiver found on i.MX7 and i.MX8 models" depends on ARCH_MXC || COMPILE_TEST diff --git a/drivers/media/platform/nxp/Makefile b/drivers/media/platform/nxp/Makefile index 4d90eb713652..6410115d870e 100644 --- a/drivers/media/platform/nxp/Makefile +++ b/drivers/media/platform/nxp/Makefile @@ -6,6 +6,7 @@ obj-y += imx8-isi/ obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-media-csi.o obj-$(CONFIG_VIDEO_IMX8MQ_MIPI_CSI2) += imx8mq-mipi-csi2.o +obj-$(CONFIG_VIDEO_IMX95_CSI_FORMATTER) += imx95-csi-formatter.o obj-$(CONFIG_VIDEO_IMX_MIPI_CSIS) += imx-mipi-csis.o obj-$(CONFIG_VIDEO_IMX_PXP) += imx-pxp.o obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o diff --git a/drivers/media/platform/nxp/imx95-csi-formatter.c b/drivers/media/platform/nxp/imx95-csi-formatter.c new file mode 100644 index 000000000000..2043f5caaad1 --- /dev/null +++ b/drivers/media/platform/nxp/imx95-csi-formatter.c @@ -0,0 +1,758 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2025 NXP + */ + +#include <linux/bits.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_clock.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> + +#include <media/mipi-csi2.h> +#include <media/v4l2-fwnode.h> +#include <media/v4l2-mc.h> +#include <media/v4l2-subdev.h> + +/* CSI Pixel Formatter registers map */ + +#define CSI_VC_INTERLACED_LINE_CNT(vc) (0x00 + (vc) * 0x04) +#define INTERLACED_ODD_LINE_CNT_SET(x) FIELD_PREP(GENMASK(13, 0), (x)) +#define INTERLACED_EVEN_LINE_CNT_SET(x) FIELD_PREP(GENMASK(29, 16), (x)) + +#define CSI_VC_INTERLACED_CTRL 0x20 + +#define CSI_VC_INTERLACED_ERR 0x24 +#define CSI_VC_ERR_MASK GENMASK(7, 0) +#define CSI_VC_ERR(vc) BIT((vc)) + +#define CSI_VC_YUV420_FIRST_LINE_EVEN 0x28 +#define YUV420_FIRST_LINE_EVEN(vc) BIT((vc)) + +#define CSI_RAW32_CTRL 0x30 +#define CSI_VC_RAW32_MODE(vc) BIT((vc)) +#define CSI_VC_RAW32_SWAP_MODE(vc) BIT((vc) + 8) + +#define CSI_STREAM_FENCING_CTRL 0x34 +#define CSI_VC_STREAM_FENCING(vc) BIT((vc)) +#define CSI_VC_STREAM_FENCING_RST(vc) BIT((vc) + 8) + +#define CSI_STREAM_FENCING_STS 0x38 +#define CSI_STREAM_FENCING_STS_MASK GENMASK(7, 0) + +#define CSI_VC_NON_PIXEL_DATA_TYPE(vc) (0x40 + (vc) * 0x04) + +#define CSI_VC_PIXEL_DATA_CTRL(vc) (0x60 + (vc) * 0x04) +#define NEW_VC(vc) FIELD_PREP(GENMASK(3, 1), vc) +#define REROUTE_VC_ENABLE BIT(0) + +#define CSI_VC_ROUTE_PIXEL_DATA_TYPE(vc) (0x80 + (vc) * 0x04) + +#define CSI_VC_NON_PIXEL_DATA_CTRL(vc) (0xa0 + (vc) * 0x04) + +#define CSI_VC_PIXEL_DATA_TYPE(vc) (0xc0 + (vc) * 0x04) + +#define CSI_VC_PIXEL_DATA_TYPE_ERR(vc) (0xe0 + (vc) * 0x04) + +#define CSI_FORMATTER_PAD_SINK 0 +#define CSI_FORMATTER_PAD_SOURCE 1 +#define CSI_FORMATTER_PAD_NUM 2 + +#define CSI_FORMATTER_VC_NUM 8 /* Number of virtual channels */ + +struct csi_formatter_pix_format { + u32 code; + u32 data_type; +}; + +struct csi_formatter { + struct device *dev; + struct regmap *regs; + u32 reg_offset; + + struct v4l2_subdev sd; + struct v4l2_async_notifier notifier; + struct media_pad pads[CSI_FORMATTER_PAD_NUM]; + + struct v4l2_subdev *remote_sd; + u32 remote_pad; + + u64 enabled_streams; +}; + +struct csi_formatter_dt_index { + u8 dtype; + u8 index; +}; + +/* + * The index corresponds to the bit index in the register that enables + * the data type of pixel data transported by the Formatter. + */ +static const struct csi_formatter_dt_index csi_formatter_dt_to_index_map[] = { + { .dtype = MIPI_CSI2_DT_YUV420_8B, .index = 0 }, + { .dtype = MIPI_CSI2_DT_YUV420_8B_LEGACY, .index = 2 }, + { .dtype = MIPI_CSI2_DT_YUV422_8B, .index = 6 }, + { .dtype = MIPI_CSI2_DT_RGB444, .index = 8 }, + { .dtype = MIPI_CSI2_DT_RGB555, .index = 9 }, + { .dtype = MIPI_CSI2_DT_RGB565, .index = 10 }, + { .dtype = MIPI_CSI2_DT_RGB666, .index = 11 }, + { .dtype = MIPI_CSI2_DT_RGB888, .index = 12 }, + { .dtype = MIPI_CSI2_DT_RAW6, .index = 16 }, + { .dtype = MIPI_CSI2_DT_RAW7, .index = 17 }, + { .dtype = MIPI_CSI2_DT_RAW8, .index = 18 }, + { .dtype = MIPI_CSI2_DT_RAW10, .index = 19 }, + { .dtype = MIPI_CSI2_DT_RAW12, .index = 20 }, + { .dtype = MIPI_CSI2_DT_RAW14, .index = 21 }, + { .dtype = MIPI_CSI2_DT_RAW16, .index = 22 }, +}; + +static const struct csi_formatter_pix_format csi_formatter_formats[] = { + /* YUV formats */ + { MEDIA_BUS_FMT_UYVY8_1X16, MIPI_CSI2_DT_YUV422_8B }, + /* RGB formats */ + { MEDIA_BUS_FMT_RGB565_1X16, MIPI_CSI2_DT_RGB565 }, + { MEDIA_BUS_FMT_RGB888_1X24, MIPI_CSI2_DT_RGB888 }, + /* RAW (Bayer and greyscale) formats */ + { MEDIA_BUS_FMT_SBGGR8_1X8, MIPI_CSI2_DT_RAW8 }, + { MEDIA_BUS_FMT_SGBRG8_1X8, MIPI_CSI2_DT_RAW8 }, + { MEDIA_BUS_FMT_SGRBG8_1X8, MIPI_CSI2_DT_RAW8 }, + { MEDIA_BUS_FMT_SRGGB8_1X8, MIPI_CSI2_DT_RAW8 }, + { MEDIA_BUS_FMT_Y8_1X8, MIPI_CSI2_DT_RAW8 }, + { MEDIA_BUS_FMT_SBGGR10_1X10, MIPI_CSI2_DT_RAW10 }, + { MEDIA_BUS_FMT_SGBRG10_1X10, MIPI_CSI2_DT_RAW10 }, + { MEDIA_BUS_FMT_SGRBG10_1X10, MIPI_CSI2_DT_RAW10 }, + { MEDIA_BUS_FMT_SRGGB10_1X10, MIPI_CSI2_DT_RAW10 }, + { MEDIA_BUS_FMT_Y10_1X10, MIPI_CSI2_DT_RAW10 }, + { MEDIA_BUS_FMT_SBGGR12_1X12, MIPI_CSI2_DT_RAW12 }, + { MEDIA_BUS_FMT_SGBRG12_1X12, MIPI_CSI2_DT_RAW12 }, + { MEDIA_BUS_FMT_SGRBG12_1X12, MIPI_CSI2_DT_RAW12 }, + { MEDIA_BUS_FMT_SRGGB12_1X12, MIPI_CSI2_DT_RAW12 }, + { MEDIA_BUS_FMT_Y12_1X12, MIPI_CSI2_DT_RAW12 }, + { MEDIA_BUS_FMT_SBGGR14_1X14, MIPI_CSI2_DT_RAW14 }, + { MEDIA_BUS_FMT_SGBRG14_1X14, MIPI_CSI2_DT_RAW14 }, + { MEDIA_BUS_FMT_SGRBG14_1X14, MIPI_CSI2_DT_RAW14 }, + { MEDIA_BUS_FMT_SRGGB14_1X14, MIPI_CSI2_DT_RAW14 }, + { MEDIA_BUS_FMT_SBGGR16_1X16, MIPI_CSI2_DT_RAW16 }, + { MEDIA_BUS_FMT_SGBRG16_1X16, MIPI_CSI2_DT_RAW16 }, + { MEDIA_BUS_FMT_SGRBG16_1X16, MIPI_CSI2_DT_RAW16 }, + { MEDIA_BUS_FMT_SRGGB16_1X16, MIPI_CSI2_DT_RAW16 }, +}; + +static const struct v4l2_mbus_framefmt formatter_default_fmt = { + .code = MEDIA_BUS_FMT_UYVY8_1X16, + .width = 1920U, + .height = 1080U, + .field = V4L2_FIELD_NONE, + .colorspace = V4L2_COLORSPACE_SMPTE170M, + .xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SMPTE170M), + .ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SMPTE170M), + .quantization = V4L2_QUANTIZATION_LIM_RANGE, +}; + +static const struct csi_formatter_pix_format *csi_formatter_find_format(u32 code) +{ + for (unsigned int i = 0; i < ARRAY_SIZE(csi_formatter_formats); i++) { + if (code == csi_formatter_formats[i].code) + return &csi_formatter_formats[i]; + } + + return NULL; +} + +/* ----------------------------------------------------------------------------- + * V4L2 subdev operations + */ + +static inline struct csi_formatter *sd_to_formatter(struct v4l2_subdev *sdev) +{ + return container_of(sdev, struct csi_formatter, sd); +} + +static int __csi_formatter_subdev_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_krouting *routing) +{ + int ret; + + ret = v4l2_subdev_routing_validate(sd, routing, + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1); + if (ret) + return ret; + + return v4l2_subdev_set_routing_with_fmt(sd, state, routing, + &formatter_default_fmt); +} + +static int csi_formatter_subdev_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state) +{ + struct v4l2_subdev_route routes[] = { + { + .sink_pad = CSI_FORMATTER_PAD_SINK, + .sink_stream = 0, + .source_pad = CSI_FORMATTER_PAD_SOURCE, + .source_stream = 0, + .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + }; + + struct v4l2_subdev_krouting routing = { + .num_routes = ARRAY_SIZE(routes), + .routes = routes, + }; + + return __csi_formatter_subdev_set_routing(sd, sd_state, &routing); +} + +static int csi_formatter_subdev_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->pad == CSI_FORMATTER_PAD_SOURCE) { + struct v4l2_mbus_framefmt *fmt; + + if (code->index > 0) + return -EINVAL; + + fmt = v4l2_subdev_state_get_format(sd_state, code->pad, + code->stream); + code->code = fmt->code; + return 0; + } + + if (code->index >= ARRAY_SIZE(csi_formatter_formats)) + return -EINVAL; + + code->code = csi_formatter_formats[code->index].code; + + return 0; +} + +static int csi_formatter_subdev_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *fmt; + + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE && + media_entity_is_streaming(&sd->entity)) + return -EBUSY; + + if (format->pad == CSI_FORMATTER_PAD_SOURCE) + return v4l2_subdev_get_fmt(sd, sd_state, format); + + if (!csi_formatter_find_format(format->format.code)) + format->format.code = csi_formatter_formats[0].code; + + v4l_bound_align_image(&format->format.width, 1, 0xffff, 2, + &format->format.height, 1, 0xffff, 0, 0); + + /* TODO: Add interlaced format support */ + format->format.field = V4L2_FIELD_NONE; + + fmt = v4l2_subdev_state_get_format(sd_state, format->pad, + format->stream); + *fmt = format->format; + + /* Propagate the format from sink stream to source stream */ + fmt = v4l2_subdev_state_get_opposite_stream_format(sd_state, format->pad, + format->stream); + *fmt = format->format; + + return 0; +} + +static int csi_formatter_subdev_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + enum v4l2_subdev_format_whence which, + struct v4l2_subdev_krouting *routing) +{ + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && + media_entity_is_streaming(&sd->entity)) + return -EBUSY; + + return __csi_formatter_subdev_set_routing(sd, state, routing); +} + +static u8 csi_formatter_get_index_by_dt(struct csi_formatter *formatter, + u8 data_type) +{ + for (unsigned int i = 0; i < ARRAY_SIZE(csi_formatter_dt_to_index_map); ++i) { + const struct csi_formatter_dt_index *entry = + &csi_formatter_dt_to_index_map[i]; + + if (data_type == entry->dtype) + return entry->index; + } + + dev_WARN(formatter->dev, "Unsupported data type 0x%x, using default\n", + data_type); + + return csi_formatter_dt_to_index_map[0].index; +} + +static int csi_formatter_get_vc(struct csi_formatter *formatter, + struct v4l2_mbus_frame_desc *fd, + unsigned int stream) +{ + struct v4l2_mbus_frame_desc_entry *entry = NULL; + u8 vc; + + for (unsigned int i = 0; i < fd->num_entries; ++i) { + if (fd->entry[i].stream == stream) { + entry = &fd->entry[i]; + break; + } + } + + if (!entry) { + dev_err(formatter->dev, + "No frame desc entry for stream %u\n", stream); + return -EPIPE; + } + + vc = entry->bus.csi2.vc; + + if (vc >= CSI_FORMATTER_VC_NUM) { + dev_err(formatter->dev, "Invalid virtual channel %u\n", vc); + return -EPIPE; + } + + return vc; +} + +static int csi_formatter_get_frame_desc(struct csi_formatter *formatter, + struct v4l2_mbus_frame_desc *fd) +{ + int ret; + + ret = v4l2_subdev_call(formatter->remote_sd, pad, get_frame_desc, + formatter->remote_pad, fd); + if (ret < 0 && ret != -ENOIOCTLCMD) { + dev_err(formatter->dev, "Failed to get frame desc: %d\n", ret); + return ret; + } + + /* + * If the source doesn't implement .get_frame_desc(), assume a single + * stream on VC 0. fd is zero-initialized, only set the fields that have + * a non-zero value. + */ + if (ret == -ENOIOCTLCMD) { + fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2; + fd->num_entries = 1; + } + + return 0; +} + +static void csi_formatter_stop_stream(struct csi_formatter *formatter, + struct v4l2_subdev_state *state, + u64 stream_mask) +{ + const struct csi_formatter_pix_format *pix_fmt; + struct v4l2_mbus_frame_desc fd = {}; + struct v4l2_subdev_route *route; + struct v4l2_mbus_framefmt *fmt; + unsigned int reg; + unsigned int mask; + int vc; + int ret; + + ret = csi_formatter_get_frame_desc(formatter, &fd); + if (ret) + return; + + for_each_active_route(&state->routing, route) { + if (!(stream_mask & BIT_ULL(route->source_stream))) + continue; + + vc = csi_formatter_get_vc(formatter, &fd, route->sink_stream); + if (vc < 0) + continue; + + fmt = v4l2_subdev_state_get_format(state, route->sink_pad, + route->sink_stream); + + pix_fmt = csi_formatter_find_format(fmt->code); + if (WARN_ON(!pix_fmt)) + continue; + + reg = CSI_VC_PIXEL_DATA_TYPE(vc) + formatter->reg_offset; + mask = BIT(csi_formatter_get_index_by_dt(formatter, + pix_fmt->data_type)); + + /* Clear the data type bit to disable this VC */ + regmap_clear_bits(formatter->regs, reg, mask); + } +} + +static int csi_formatter_start_stream(struct csi_formatter *formatter, + struct v4l2_subdev_state *state, + u64 stream_mask) +{ + const struct csi_formatter_pix_format *pix_fmt; + struct v4l2_subdev_route *route; + struct v4l2_mbus_framefmt *fmt; + struct v4l2_mbus_frame_desc fd = {}; + u64 configured_streams = 0; + unsigned int reg; + unsigned int mask; + int vc; + int ret; + + ret = csi_formatter_get_frame_desc(formatter, &fd); + if (ret) + return ret; + + for_each_active_route(&state->routing, route) { + if (!(stream_mask & BIT_ULL(route->source_stream))) + continue; + + vc = csi_formatter_get_vc(formatter, &fd, route->sink_stream); + if (vc < 0) { + ret = vc; + goto err_cleanup; + } + + fmt = v4l2_subdev_state_get_format(state, route->sink_pad, + route->sink_stream); + + pix_fmt = csi_formatter_find_format(fmt->code); + if (WARN_ON(!pix_fmt)) { + ret = -EINVAL; + goto err_cleanup; + } + + reg = CSI_VC_PIXEL_DATA_TYPE(vc) + formatter->reg_offset; + mask = BIT(csi_formatter_get_index_by_dt(formatter, + pix_fmt->data_type)); + + /* Set the data type bit to enable this VC */ + regmap_set_bits(formatter->regs, reg, mask); + + configured_streams |= BIT_ULL(route->source_stream); + } + + return 0; + +err_cleanup: + csi_formatter_stop_stream(formatter, state, configured_streams); + return ret; +} + +static int csi_formatter_subdev_enable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + u32 pad, u64 streams_mask) +{ + struct csi_formatter *formatter = sd_to_formatter(sd); + struct device *dev = formatter->dev; + u64 sink_streams; + int ret; + + sink_streams = v4l2_subdev_state_xlate_streams(state, + CSI_FORMATTER_PAD_SOURCE, + CSI_FORMATTER_PAD_SINK, + &streams_mask); + if (!sink_streams || !streams_mask) + return -EINVAL; + + if (!formatter->enabled_streams) { + ret = pm_runtime_resume_and_get(formatter->dev); + if (ret < 0) { + dev_err(dev, "Failed to resume runtime PM: %d\n", ret); + return ret; + } + } + + ret = csi_formatter_start_stream(formatter, state, streams_mask); + if (ret) + goto err_runtime_put; + + ret = v4l2_subdev_enable_streams(formatter->remote_sd, + formatter->remote_pad, + sink_streams); + if (ret) + goto err_stop_stream; + + formatter->enabled_streams |= streams_mask; + + return 0; + +err_stop_stream: + csi_formatter_stop_stream(formatter, state, streams_mask); +err_runtime_put: + if (!formatter->enabled_streams) + pm_runtime_put_autosuspend(formatter->dev); + return ret; +} + +static int csi_formatter_subdev_disable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + u32 pad, u64 streams_mask) +{ + struct csi_formatter *formatter = sd_to_formatter(sd); + u64 sink_streams; + int ret; + + sink_streams = v4l2_subdev_state_xlate_streams(state, + CSI_FORMATTER_PAD_SOURCE, + CSI_FORMATTER_PAD_SINK, + &streams_mask); + if (!sink_streams || !streams_mask) + return -EINVAL; + + ret = v4l2_subdev_disable_streams(formatter->remote_sd, formatter->remote_pad, + sink_streams); + if (ret) + dev_err(formatter->dev, "Failed to disable streams: %d\n", ret); + + csi_formatter_stop_stream(formatter, state, streams_mask); + + formatter->enabled_streams &= ~streams_mask; + + if (!formatter->enabled_streams) + pm_runtime_put_autosuspend(formatter->dev); + + return ret; +} + +static const struct v4l2_subdev_pad_ops formatter_subdev_pad_ops = { + .enum_mbus_code = csi_formatter_subdev_enum_mbus_code, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = csi_formatter_subdev_set_fmt, + .get_frame_desc = v4l2_subdev_get_frame_desc_passthrough, + .set_routing = csi_formatter_subdev_set_routing, + .enable_streams = csi_formatter_subdev_enable_streams, + .disable_streams = csi_formatter_subdev_disable_streams, +}; + +static const struct v4l2_subdev_ops formatter_subdev_ops = { + .pad = &formatter_subdev_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops formatter_internal_ops = { + .init_state = csi_formatter_subdev_init_state, +}; + +/* ----------------------------------------------------------------------------- + * Media entity operations + */ + +static const struct media_entity_operations formatter_entity_ops = { + .link_validate = v4l2_subdev_link_validate, + .get_fwnode_pad = v4l2_subdev_get_fwnode_pad_1_to_1, +}; + +static int csi_formatter_subdev_init(struct csi_formatter *formatter) +{ + struct v4l2_subdev *sd = &formatter->sd; + int ret; + + v4l2_subdev_init(sd, &formatter_subdev_ops); + + strscpy(sd->name, dev_name(formatter->dev), sizeof(sd->name)); + sd->internal_ops = &formatter_internal_ops; + + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | + V4L2_SUBDEV_FL_STREAMS; + sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; + sd->entity.ops = &formatter_entity_ops; + sd->dev = formatter->dev; + + formatter->pads[CSI_FORMATTER_PAD_SINK].flags = MEDIA_PAD_FL_SINK + | MEDIA_PAD_FL_MUST_CONNECT; + formatter->pads[CSI_FORMATTER_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE; + + ret = media_entity_pads_init(&sd->entity, CSI_FORMATTER_PAD_NUM, + formatter->pads); + if (ret) { + dev_err(formatter->dev, "Failed to init pads\n"); + return ret; + } + + ret = v4l2_subdev_init_finalize(sd); + if (ret) + media_entity_cleanup(&sd->entity); + + return ret; +} + +static inline struct csi_formatter * +notifier_to_csi_formatter(struct v4l2_async_notifier *n) +{ + return container_of(n, struct csi_formatter, notifier); +} + +static int csi_formatter_notify_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *sd, + struct v4l2_async_connection *asc) +{ + const unsigned int link_flags = MEDIA_LNK_FL_IMMUTABLE + | MEDIA_LNK_FL_ENABLED; + struct csi_formatter *formatter = notifier_to_csi_formatter(notifier); + struct v4l2_subdev *sdev = &formatter->sd; + struct media_pad *sink = &sdev->entity.pads[CSI_FORMATTER_PAD_SINK]; + int ret; + + formatter->remote_sd = sd; + + ret = v4l2_create_fwnode_links_to_pad(sd, sink, link_flags); + if (ret < 0) + return ret; + + formatter->remote_pad = media_pad_remote_pad_first(sink)->index; + + return 0; +} + +static const struct v4l2_async_notifier_operations formatter_notify_ops = { + .bound = csi_formatter_notify_bound, +}; + +static int csi_formatter_async_register(struct csi_formatter *formatter) +{ + struct device *dev = formatter->dev; + struct v4l2_async_connection *asc; + int ret; + + struct fwnode_handle *ep __free(fwnode_handle) = + fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, + FWNODE_GRAPH_ENDPOINT_NEXT); + if (!ep) + return -ENOTCONN; + + v4l2_async_subdev_nf_init(&formatter->notifier, &formatter->sd); + + asc = v4l2_async_nf_add_fwnode_remote(&formatter->notifier, ep, + struct v4l2_async_connection); + if (IS_ERR(asc)) { + ret = PTR_ERR(asc); + goto err_cleanup_notifier; + } + + formatter->notifier.ops = &formatter_notify_ops; + + ret = v4l2_async_nf_register(&formatter->notifier); + if (ret) + goto err_cleanup_notifier; + + ret = v4l2_async_register_subdev(&formatter->sd); + if (ret) + goto err_unregister_notifier; + + return 0; + +err_unregister_notifier: + v4l2_async_nf_unregister(&formatter->notifier); +err_cleanup_notifier: + v4l2_async_nf_cleanup(&formatter->notifier); + return ret; +} + +static void csi_formatter_async_unregister(struct csi_formatter *formatter) +{ + v4l2_async_unregister_subdev(&formatter->sd); + v4l2_async_nf_unregister(&formatter->notifier); + v4l2_async_nf_cleanup(&formatter->notifier); +} + +static DEFINE_RUNTIME_DEV_PM_OPS(csi_formatter_pm_ops, + pm_clk_suspend, pm_clk_resume, NULL); + +static int csi_formatter_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct csi_formatter *formatter; + int ret; + + formatter = devm_kzalloc(dev, sizeof(*formatter), GFP_KERNEL); + if (!formatter) + return -ENOMEM; + + formatter->dev = dev; + + formatter->regs = syscon_node_to_regmap(dev->parent->of_node); + if (IS_ERR(formatter->regs)) + return dev_err_probe(dev, PTR_ERR(formatter->regs), + "Failed to get csi formatter regmap\n"); + + ret = of_property_read_u32(dev->of_node, "reg", &formatter->reg_offset); + if (ret < 0) + return dev_err_probe(dev, ret, + "Failed to get csi formatter reg property\n"); + + ret = devm_pm_clk_create(dev); + if (ret) + return ret; + + ret = of_pm_clk_add_clks(dev); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to add clocks\n"); + + ret = csi_formatter_subdev_init(formatter); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to initialize formatter subdev\n"); + + platform_set_drvdata(pdev, formatter); + + /* Enable runtime PM with autosuspend. */ + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + ret = devm_pm_runtime_enable(dev); + if (ret) + goto err_pm_disable; + + ret = csi_formatter_async_register(formatter); + if (ret < 0) { + dev_err_probe(dev, ret, "Failed to register async subdevice\n"); + goto err_pm_disable; + } + + return 0; + +err_pm_disable: + pm_runtime_dont_use_autosuspend(dev); + v4l2_subdev_cleanup(&formatter->sd); + media_entity_cleanup(&formatter->sd.entity); + return ret; +} + +static void csi_formatter_remove(struct platform_device *pdev) +{ + struct csi_formatter *formatter = platform_get_drvdata(pdev); + + csi_formatter_async_unregister(formatter); + + pm_runtime_dont_use_autosuspend(&pdev->dev); + pm_runtime_suspend(&pdev->dev); + + v4l2_subdev_cleanup(&formatter->sd); + media_entity_cleanup(&formatter->sd.entity); +} + +static const struct of_device_id csi_formatter_of_match[] = { + { .compatible = "fsl,imx95-csi-formatter" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, csi_formatter_of_match); + +static struct platform_driver csi_formatter_device_driver = { + .driver = { + .name = "csi-pixel-formatter", + .of_match_table = csi_formatter_of_match, + .pm = pm_ptr(&csi_formatter_pm_ops), + }, + .probe = csi_formatter_probe, + .remove = csi_formatter_remove, +}; + +module_platform_driver(csi_formatter_device_driver); + +MODULE_AUTHOR("NXP Semiconductor, Inc."); +MODULE_DESCRIPTION("NXP i.MX95 CSI Pixel Formatter driver"); +MODULE_LICENSE("GPL"); _______________________________________________ linuxtv-commits mailing list -- [email protected] To unsubscribe send an email to [email protected]
