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Add #address-cells, #size-cells properties and patternProperties to allow child device nodes with their own bindings. Signed-off-by: Guoniu Zhou --- Changes in v9: - New patch to address the issue of formatter acting as a child node of sys= con --- .../devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml | 11 +++++++= ++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml= b/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml index 27403b4c52d6..33ad1c15cc9c 100644 --- a/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml +++ b/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml @@ -39,6 +39,17 @@ properties: ID in its "clocks" phandle cell. 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Reviewed-by: Frank Li Reviewed-by: Krzysztof Kozlowski Signed-off-by: Guoniu Zhou --- Changes in v8: - Use standard port reference instead of video-interfaces.yaml - Add parent syscon node in example to show device integration - Add required constraints for port@0 and port@1 in ports node Changes in v7: - Change compatible to imx95-csi-formatter as IP is i.MX95 specific per Mar= co's suggestion Link: https://lore.kernel.org/linux-media/20260511-csi_formatter-v6-0-010= 28e312e2b@oss.nxp.com/T/#mcd135b3de179b3cb69daa1fd6e0e8e27c85b3332 --- .../bindings/media/fsl,imx95-csi-formatter.yaml | 96 ++++++++++++++++++= ++++ 1 file changed, 96 insertions(+) diff --git a/Documentation/devicetree/bindings/media/fsl,imx95-csi-formatte= r.yaml b/Documentation/devicetree/bindings/media/fsl,imx95-csi-formatter.ya= ml new file mode 100644 index 000000000000..61068ea0a69a --- /dev/null +++ b/Documentation/devicetree/bindings/media/fsl,imx95-csi-formatter.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/fsl,imx95-csi-formatter.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: i.MX95 CSI Pixel Formatter + +maintainers: + - Guoniu Zhou + +description: + The CSI pixel formatting module found on i.MX95 uses packet info, pixel + and non-pixel data from the CSI-2 host controller and reformat them to + match Pixel Link(PL) definition. + +properties: + compatible: + const: fsl,imx95-csi-formatter + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + power-domains: + maxItems: 1 + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: MIPI CSI-2 RX IDI interface + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: Pixel Link Interface + + required: + - port@0 + - port@1 + +required: + - compatible + - reg + - clocks + - power-domains + - ports + +additionalProperties: false + +examples: + - | + #include + + syscon@4c100000 { + compatible =3D "nxp,imx95-camera-csr", "syscon"; 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Add data formatting support. Reviewed-by: Frank Li Signed-off-by: Guoniu Zhou --- Changes in v8: - Remove fmt field and look up format from subdev state instead - Unify function and structure naming to use csi_formatter_ prefix - Remove misleading alignment comment from set_fmt function - Optimize get_frame_desc to call once per start_stream - Replace V4L2_FRAME_DESC_ENTRY_MAX with CSI_FORMATTER_VC_NUM in loops - Remove redundant debug message in enable_streams - Use MEDIA_PAD_FL_MUST_CONNECT flag instead of manual link check - Fix typo: Formater -> Formatter in Kconfig help text - Improve grammar in data type index mapping comment Changes in v7: - Update references from imx9 to imx95 for consistency with dt-bindings - Enable PM runtime before async registration Changes in v6: - Remove unused header includes - Unify macro naming: VCx/VCX -> VC and parameter x -> vc - Remove unused format field from csi_formatter struct - Use compact initialization for formats array - Make find_csi_format() return NULL instead of default format - Use unsigned int for array index in find_csi_format() - Add err_ prefix to error handling labels - Add v4l2_subdev_cleanup() and reorder cleanup sequence - Update enable_streams debug output format - Rename VC_MAX to VC_NUM and fix boundary check - Update CSI formatter Kconfig description - Use v4l2_subdev_get_frame_desc_passthrough() helper - Fix error paths in async registration and probe - Add mutex to protect enabled_streams - Switch to devm_pm_runtime_enable() - Remove redundant num_routes check in set_routing - Optimize get_index_by_dt() and add warning for unsupported type - csi_formatter_start/stop_stream: Process all streams in mask --- MAINTAINERS | 8 + drivers/media/platform/nxp/Kconfig | 14 + drivers/media/platform/nxp/Makefile | 1 + drivers/media/platform/nxp/imx95-csi-formatter.c | 758 +++++++++++++++++++= ++++ 4 files changed, 781 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 3124500ff432..5229b75d930a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19269,6 +19269,14 @@ S: Maintained F: Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml F: drivers/media/platform/nxp/imx-jpeg =20 +NXP i.MX 95 CSI PIXEL FORMATTER V4L2 DRIVER +M: Guoniu Zhou +L: imx@lists.linux.dev +L: linux-media@vger.kernel.org +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 R: Peng Fan diff --git a/drivers/media/platform/nxp/Kconfig b/drivers/media/platform/nx= p/Kconfig index 40e3436669e2..1eccf128d149 100644 --- a/drivers/media/platform/nxp/Kconfig +++ b/drivers/media/platform/nxp/Kconfig @@ -28,6 +28,20 @@ config VIDEO_IMX8MQ_MIPI_CSI2 Video4Linux2 driver for the MIPI CSI-2 receiver found on the i.MX8MQ SoC. =20 +config VIDEO_IMX95_CSI_FORMATTER + tristate "NXP i.MX95 CSI Pixel Formatter driver" + depends on ARCH_MXC || COMPILE_TEST + depends on VIDEO_DEV + select MEDIA_CONTROLLER + 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/n= xp/Makefile index 4d90eb713652..6410115d870e 100644 --- a/drivers/media/platform/nxp/Makefile +++ b/drivers/media/platform/nxp/Makefile @@ -6,6 +6,7 @@ obj-y +=3D imx8-isi/ =20 obj-$(CONFIG_VIDEO_IMX7_CSI) +=3D imx7-media-csi.o obj-$(CONFIG_VIDEO_IMX8MQ_MIPI_CSI2) +=3D imx8mq-mipi-csi2.o +obj-$(CONFIG_VIDEO_IMX95_CSI_FORMATTER) +=3D imx95-csi-formatter.o obj-$(CONFIG_VIDEO_IMX_MIPI_CSIS) +=3D imx-mipi-csis.o obj-$(CONFIG_VIDEO_IMX_PXP) +=3D imx-pxp.o obj-$(CONFIG_VIDEO_MX2_EMMAPRP) +=3D mx2_emmaprp.o diff --git a/drivers/media/platform/nxp/imx95-csi-formatter.c b/drivers/med= ia/platform/nxp/imx95-csi-formatter.c new file mode 100644 index 000000000000..9dee38d85839 --- /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 +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +/* 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; + struct clk *clk; + + struct v4l2_subdev sd; + struct v4l2_subdev *csi_sd; + struct v4l2_async_notifier notifier; + struct media_pad pads[CSI_FORMATTER_PAD_NUM]; + + u32 remote_pad; + u32 reg_offset; + + /* Protects enabled_streams */ + struct mutex lock; + 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 formatter_dt_to_index_map[] =3D= { + { .dtype =3D MIPI_CSI2_DT_YUV420_8B, .index =3D 0 }, + { .dtype =3D MIPI_CSI2_DT_YUV420_8B_LEGACY, .index =3D 2 }, + { .dtype =3D MIPI_CSI2_DT_YUV422_8B, .index =3D 6 }, + { .dtype =3D MIPI_CSI2_DT_RGB444, .index =3D 8 }, + { .dtype =3D MIPI_CSI2_DT_RGB555, .index =3D 9 }, + { .dtype =3D MIPI_CSI2_DT_RGB565, .index =3D 10 }, + { .dtype =3D MIPI_CSI2_DT_RGB666, .index =3D 11 }, + { .dtype =3D MIPI_CSI2_DT_RGB888, .index =3D 12 }, + { .dtype =3D MIPI_CSI2_DT_RAW6, .index =3D 16 }, + { .dtype =3D MIPI_CSI2_DT_RAW7, .index =3D 17 }, + { .dtype =3D MIPI_CSI2_DT_RAW8, .index =3D 18 }, + { .dtype =3D MIPI_CSI2_DT_RAW10, .index =3D 19 }, + { .dtype =3D MIPI_CSI2_DT_RAW12, .index =3D 20 }, + { .dtype =3D MIPI_CSI2_DT_RAW14, .index =3D 21 }, + { .dtype =3D MIPI_CSI2_DT_RAW16, .index =3D 22 }, +}; + +static const struct csi_formatter_pix_format formats[] =3D { + /* 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 =3D { + .code =3D MEDIA_BUS_FMT_UYVY8_1X16, + .width =3D 1920U, + .height =3D 1080U, + .field =3D V4L2_FIELD_NONE, + .colorspace =3D V4L2_COLORSPACE_SMPTE170M, + .xfer_func =3D V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SMPTE170M), + .ycbcr_enc =3D V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SMPTE170M), + .quantization =3D V4L2_QUANTIZATION_LIM_RANGE, +}; + +static const struct csi_formatter_pix_format *csi_formatter_find_format(u3= 2 code) +{ + unsigned int i; + + for (i =3D 0; i < ARRAY_SIZE(formats); i++) + if (code =3D=3D formats[i].code) + return &formats[i]; + + return NULL; +} + +/* -----------------------------------------------------------------------= ------ + * V4L2 subdev operations + */ + +static inline struct csi_formatter *sd_to_formatter(struct v4l2_subdev *sd= ev) +{ + 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 =3D 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[] =3D { + { + .sink_pad =3D CSI_FORMATTER_PAD_SINK, + .sink_stream =3D 0, + .source_pad =3D CSI_FORMATTER_PAD_SOURCE, + .source_stream =3D 0, + .flags =3D V4L2_SUBDEV_ROUTE_FL_ACTIVE, + }, + }; + + struct v4l2_subdev_krouting routing =3D { + .num_routes =3D ARRAY_SIZE(routes), + .routes =3D 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 =3D=3D CSI_FORMATTER_PAD_SOURCE) { + struct v4l2_mbus_framefmt *fmt; + + if (code->index > 0) + return -EINVAL; + + fmt =3D v4l2_subdev_state_get_format(sd_state, code->pad, + code->stream); + code->code =3D fmt->code; + return 0; + } + + if (code->index >=3D ARRAY_SIZE(formats)) + return -EINVAL; + + code->code =3D 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 *sdformat) +{ + struct csi_formatter_pix_format const *format; + struct v4l2_mbus_framefmt *fmt; + + if (sdformat->pad =3D=3D CSI_FORMATTER_PAD_SOURCE) + return v4l2_subdev_get_fmt(sd, sd_state, sdformat); + + format =3D csi_formatter_find_format(sdformat->format.code); + if (!format) + format =3D &formats[0]; + + v4l_bound_align_image(&sdformat->format.width, 1, 0xffff, 2, + &sdformat->format.height, 1, 0xffff, 0, 0); + + fmt =3D v4l2_subdev_state_get_format(sd_state, sdformat->pad, + sdformat->stream); + *fmt =3D sdformat->format; + + /* Set default code if user set an invalid value */ + fmt->code =3D format->code; + + /* Propagate the format from sink stream to source stream */ + fmt =3D v4l2_subdev_state_get_opposite_stream_format(sd_state, sdformat->= pad, + sdformat->stream); + if (!fmt) + return -EINVAL; + + *fmt =3D sdformat->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 =3D=3D V4L2_SUBDEV_FORMAT_ACTIVE && + media_entity_is_streaming(&sd->entity)) + return -EBUSY; + + return __csi_formatter_subdev_set_routing(sd, state, routing); +} + +static inline void csi_formatter_write(struct csi_formatter *formatter, + unsigned int reg, unsigned int value) +{ + u32 offset =3D formatter->reg_offset; + + regmap_write(formatter->regs, reg + offset, value); +} + +static u8 csi_formatter_get_index_by_dt(u8 data_type) +{ + unsigned int i; + + for (i =3D 0; i < ARRAY_SIZE(formatter_dt_to_index_map); ++i) { + const struct csi_formatter_dt_index *entry =3D + &formatter_dt_to_index_map[i]; + + if (data_type =3D=3D entry->dtype) + return entry->index; + } + + pr_warn_once("Unsupported data type 0x%x, using default\n", data_type); + + return 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 =3D NULL; + unsigned int i; + int vc; + + for (i =3D 0; i < fd->num_entries; ++i) { + if (fd->entry[i].stream =3D=3D stream) { + entry =3D &fd->entry[i]; + break; + } + } + + if (!entry) { + dev_err(formatter->dev, + "No frame desc entry for stream %u\n", stream); + return -EPIPE; + } + + vc =3D entry->bus.csi2.vc; + + if (vc < 0 || vc >=3D CSI_FORMATTER_VC_NUM) { + dev_err(formatter->dev, "Invalid virtual channel %d\n", vc); + return -EINVAL; + } + + return vc; +} + +static void csi_formatter_stop_stream(struct csi_formatter *formatter, + u64 stream_mask) +{ + unsigned int i; + + for (i =3D 0; i < CSI_FORMATTER_VC_NUM; ++i) { + if (!(stream_mask & BIT(i))) + continue; + + csi_formatter_write(formatter, CSI_VC_PIXEL_DATA_TYPE(i), 0); + } +} + +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_mbus_framefmt *fmt; + struct v4l2_mbus_frame_desc fd =3D {}; + u64 configured_streams =3D 0; + unsigned int i; + u32 val; + int vc; + int ret; + + ret =3D v4l2_subdev_call(formatter->csi_sd, pad, get_frame_desc, + formatter->remote_pad, &fd); + if (ret < 0 && ret !=3D -ENOIOCTLCMD) { + dev_err(formatter->dev, "Failed to get frame desc: %d\n", ret); + return ret; + } + + for (i =3D 0; i < CSI_FORMATTER_VC_NUM; ++i) { + if (!(stream_mask & BIT(i))) + continue; + + fmt =3D v4l2_subdev_state_get_format(state, + CSI_FORMATTER_PAD_SINK, i); + + pix_fmt =3D csi_formatter_find_format(fmt->code); + + val =3D BIT(csi_formatter_get_index_by_dt(pix_fmt->data_type)); + + if (ret =3D=3D -ENOIOCTLCMD) { + /* + * Source doesn't implement get_frame_desc, use + * default VC 0 + */ + vc =3D 0; + } else { + vc =3D csi_formatter_get_vc(formatter, &fd, i); + if (vc < 0) { + ret =3D vc; + goto err_cleanup; + } + } + + csi_formatter_write(formatter, CSI_VC_PIXEL_DATA_TYPE(vc), val); + configured_streams |=3D BIT(i); + } + + return 0; + +err_cleanup: + csi_formatter_stop_stream(formatter, 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 =3D sd_to_formatter(sd); + struct device *dev =3D formatter->dev; + u64 sink_streams; + int ret; + + sink_streams =3D v4l2_subdev_state_xlate_streams(state, + CSI_FORMATTER_PAD_SOURCE, + CSI_FORMATTER_PAD_SINK, + &streams_mask); + if (!sink_streams || !streams_mask) + return -EINVAL; + + guard(mutex)(&formatter->lock); + + if (!formatter->enabled_streams) { + ret =3D pm_runtime_resume_and_get(formatter->dev); + if (ret < 0) { + dev_err(dev, "Failed to resume runtime PM: %d\n", ret); + return ret; + } + } + + ret =3D csi_formatter_start_stream(formatter, state, streams_mask); + if (ret) + goto err_runtime_put; + + ret =3D v4l2_subdev_enable_streams(formatter->csi_sd, + formatter->remote_pad, + sink_streams); + if (ret) + goto err_stop_stream; + + formatter->enabled_streams |=3D streams_mask; + + return 0; + +err_stop_stream: + csi_formatter_stop_stream(formatter, streams_mask); +err_runtime_put: + if (!formatter->enabled_streams) + pm_runtime_put(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 =3D sd_to_formatter(sd); + u64 sink_streams; + int ret; + + sink_streams =3D v4l2_subdev_state_xlate_streams(state, + CSI_FORMATTER_PAD_SOURCE, + CSI_FORMATTER_PAD_SINK, + &streams_mask); + if (!sink_streams || !streams_mask) + return -EINVAL; + + guard(mutex)(&formatter->lock); + + ret =3D v4l2_subdev_disable_streams(formatter->csi_sd, formatter->remote_= pad, + sink_streams); + if (ret) + dev_err(formatter->dev, "Failed to disable streams: %d\n", ret); + + csi_formatter_stop_stream(formatter, streams_mask); + + formatter->enabled_streams &=3D ~streams_mask; + + if (!formatter->enabled_streams) + pm_runtime_put(formatter->dev); + + return ret; +} + +static const struct v4l2_subdev_pad_ops formatter_subdev_pad_ops =3D { + .enum_mbus_code =3D csi_formatter_subdev_enum_mbus_code, + .get_fmt =3D v4l2_subdev_get_fmt, + .set_fmt =3D csi_formatter_subdev_set_fmt, + .get_frame_desc =3D v4l2_subdev_get_frame_desc_passthrough, + .set_routing =3D csi_formatter_subdev_set_routing, + .enable_streams =3D csi_formatter_subdev_enable_streams, + .disable_streams =3D csi_formatter_subdev_disable_streams, +}; + +static const struct v4l2_subdev_ops formatter_subdev_ops =3D { + .pad =3D &formatter_subdev_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops formatter_internal_ops =3D { + .init_state =3D csi_formatter_subdev_init_state, +}; + +/* -----------------------------------------------------------------------= ------ + * Media entity operations + */ + +static const struct media_entity_operations formatter_entity_ops =3D { + .link_validate =3D v4l2_subdev_link_validate, + .get_fwnode_pad =3D v4l2_subdev_get_fwnode_pad_1_to_1, +}; + +static int csi_formatter_subdev_init(struct csi_formatter *formatter) +{ + struct v4l2_subdev *sd =3D &formatter->sd; + int ret; + + v4l2_subdev_init(sd, &formatter_subdev_ops); + + snprintf(sd->name, sizeof(sd->name), "%s", dev_name(formatter->dev)); + sd->internal_ops =3D &formatter_internal_ops; + + sd->flags |=3D V4L2_SUBDEV_FL_HAS_DEVNODE | + V4L2_SUBDEV_FL_HAS_EVENTS | + V4L2_SUBDEV_FL_STREAMS; + sd->entity.function =3D MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; + sd->entity.ops =3D &formatter_entity_ops; + sd->dev =3D formatter->dev; + + formatter->pads[CSI_FORMATTER_PAD_SINK].flags =3D MEDIA_PAD_FL_SINK + | MEDIA_PAD_FL_MUST_CONNECT; + formatter->pads[CSI_FORMATTER_PAD_SOURCE].flags =3D MEDIA_PAD_FL_SOURCE; + + ret =3D 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 =3D 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 =3D MEDIA_LNK_FL_IMMUTABLE + | MEDIA_LNK_FL_ENABLED; + struct csi_formatter *formatter =3D notifier_to_csi_formatter(notifier); + struct v4l2_subdev *sdev =3D &formatter->sd; + struct media_pad *sink =3D &sdev->entity.pads[CSI_FORMATTER_PAD_SINK]; + struct media_pad *remote_pad; + int ret; + + formatter->csi_sd =3D sd; + + dev_dbg(formatter->dev, "Bound subdev: %s pad\n", sd->name); + + ret =3D v4l2_create_fwnode_links_to_pad(sd, sink, link_flags); + if (ret < 0) + return ret; + + remote_pad =3D media_pad_remote_pad_first(sink); + if (!remote_pad) { + dev_err(formatter->dev, "Pipe not setup correctly\n"); + return -EPIPE; + } + formatter->remote_pad =3D remote_pad->index; + + return 0; +} + +static const struct v4l2_async_notifier_operations formatter_notify_ops = =3D { + .bound =3D csi_formatter_notify_bound, +}; + +static int csi_formatter_async_register(struct csi_formatter *formatter) +{ + struct device *dev =3D formatter->dev; + struct v4l2_async_connection *asc; + int ret; + + struct fwnode_handle *ep __free(fwnode_handle) =3D + 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 =3D v4l2_async_nf_add_fwnode_remote(&formatter->notifier, ep, + struct v4l2_async_connection); + if (IS_ERR(asc)) { + ret =3D PTR_ERR(asc); + goto err_cleanup_notifier; + } + + formatter->notifier.ops =3D &formatter_notify_ops; + + ret =3D v4l2_async_nf_register(&formatter->notifier); + if (ret) + goto err_cleanup_notifier; + + ret =3D 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); +} + +/* -----------------------------------------------------------------------= ------ + * Suspend/resume + */ + +static int csi_formatter_runtime_suspend(struct device *dev) +{ + struct v4l2_subdev *sd =3D dev_get_drvdata(dev); + struct csi_formatter *formatter =3D sd_to_formatter(sd); + + clk_disable_unprepare(formatter->clk); + + return 0; +} + +static int csi_formatter_runtime_resume(struct device *dev) +{ + struct v4l2_subdev *sd =3D dev_get_drvdata(dev); + struct csi_formatter *formatter =3D sd_to_formatter(sd); + + return clk_prepare_enable(formatter->clk); +} + +static DEFINE_RUNTIME_DEV_PM_OPS(csi_formatter_pm_ops, + csi_formatter_runtime_suspend, + csi_formatter_runtime_resume, NULL); + +static int csi_formatter_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct csi_formatter *formatter; + u32 val; + int ret; + + formatter =3D devm_kzalloc(dev, sizeof(*formatter), GFP_KERNEL); + if (!formatter) + return -ENOMEM; + + formatter->dev =3D dev; + + ret =3D devm_mutex_init(dev, &formatter->lock); + if (ret) + return ret; + + formatter->regs =3D 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 =3D of_property_read_u32(dev->of_node, "reg", &val); + if (ret < 0) + return dev_err_probe(dev, ret, + "Failed to get csi formatter reg property\n"); + + formatter->reg_offset =3D val; + + formatter->clk =3D devm_clk_get(dev, NULL); + if (IS_ERR(formatter->clk)) + return dev_err_probe(dev, PTR_ERR(formatter->clk), + "Failed to get pixel clock\n"); + + ret =3D 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->sd); + + /* Enable runtime PM. */ + ret =3D devm_pm_runtime_enable(dev); + if (ret) + goto err_cleanup_subdev; + + ret =3D csi_formatter_async_register(formatter); + if (ret < 0) { + dev_err_probe(dev, ret, "Failed to register async subdevice\n"); + goto err_cleanup_subdev; + } + + return 0; + +err_cleanup_subdev: + v4l2_subdev_cleanup(&formatter->sd); + media_entity_cleanup(&formatter->sd.entity); + return ret; +} + +static void csi_formatter_remove(struct platform_device *pdev) +{ + struct v4l2_subdev *sd =3D platform_get_drvdata(pdev); + struct csi_formatter *formatter =3D sd_to_formatter(sd); + + csi_formatter_async_unregister(formatter); + + v4l2_subdev_cleanup(&formatter->sd); + media_entity_cleanup(&formatter->sd.entity); +} + +static const struct of_device_id csi_formatter_of_match[] =3D { + { .compatible =3D "fsl,imx95-csi-formatter" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, csi_formatter_of_match); + +static struct platform_driver csi_formatter_device_driver =3D { + .driver =3D { + .name =3D "csi-pixel-formatter", + .of_match_table =3D csi_formatter_of_match, + .pm =3D pm_ptr(&csi_formatter_pm_ops), + }, + .probe =3D csi_formatter_probe, + .remove =3D 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"); --=20 2.34.1