// SPDX-License-Identifier: GPL-2.0-or-later /* * vimc-debayer.c Virtual Media Controller Driver * * Copyright (C) 2015-2017 Helen Koike */ #include #include #include #include #include #include #include #include "vimc-common.h" #define VIMC_DEB_DRV_NAME "vimc-debayer" /* This module only supports tranforming a bayer format to V4L2_PIX_FMT_RGB24 */ #define VIMC_DEB_SRC_PIXFMT V4L2_PIX_FMT_RGB24 #define VIMC_DEB_SRC_MBUS_FMT_DEFAULT MEDIA_BUS_FMT_RGB888_1X24 static unsigned int deb_mean_win_size = 3; module_param(deb_mean_win_size, uint, 0000); MODULE_PARM_DESC(deb_mean_win_size, " the window size to calculate the mean.\n" "NOTE: the window size need to be an odd number, as the main pixel " "stays in the center of the window, otherwise the next odd number " "is considered"); #define IS_SINK(pad) (!pad) #define IS_SRC(pad) (pad) enum vimc_deb_rgb_colors { VIMC_DEB_RED = 0, VIMC_DEB_GREEN = 1, VIMC_DEB_BLUE = 2, }; struct vimc_deb_pix_map { u32 pixelformat; u32 code; enum vimc_deb_rgb_colors order[2][2]; }; struct vimc_deb_device { struct vimc_ent_device ved; struct v4l2_subdev sd; struct device *dev; /* The active format */ struct v4l2_mbus_framefmt sink_fmt; u32 src_code; void (*set_rgb_src)(struct vimc_deb_device *vdeb, unsigned int lin, unsigned int col, unsigned int rgb[3]); /* Values calculated when the stream starts */ u8 *src_frame; const struct vimc_deb_pix_map *sink_pix_map; unsigned int sink_bpp; }; static const struct v4l2_mbus_framefmt sink_fmt_default = { .width = 640, .height = 480, .code = MEDIA_BUS_FMT_SRGGB8_1X8, .field = V4L2_FIELD_NONE, .colorspace = V4L2_COLORSPACE_DEFAULT, }; static const struct vimc_deb_pix_map vimc_deb_pix_map_list[] = { { .pixelformat = V4L2_PIX_FMT_SBGGR8, .code = MEDIA_BUS_FMT_SBGGR8_1X8, .order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN }, { VIMC_DEB_GREEN, VIMC_DEB_RED } } }, { .pixelformat = V4L2_PIX_FMT_SGBRG8, .code = MEDIA_BUS_FMT_SGBRG8_1X8, .order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE }, { VIMC_DEB_RED, VIMC_DEB_GREEN } } }, { .pixelformat = V4L2_PIX_FMT_SGRBG8, .code = MEDIA_BUS_FMT_SGRBG8_1X8, .order = { { VIMC_DEB_GREEN, VIMC_DEB_RED }, { VIMC_DEB_BLUE, VIMC_DEB_GREEN } } }, { .pixelformat = V4L2_PIX_FMT_SRGGB8, .code = MEDIA_BUS_FMT_SRGGB8_1X8, .order = { { VIMC_DEB_RED, VIMC_DEB_GREEN }, { VIMC_DEB_GREEN, VIMC_DEB_BLUE } } }, { .pixelformat = V4L2_PIX_FMT_SBGGR10, .code = MEDIA_BUS_FMT_SBGGR10_1X10, .order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN }, { VIMC_DEB_GREEN, VIMC_DEB_RED } } }, { .pixelformat = V4L2_PIX_FMT_SGBRG10, .code = MEDIA_BUS_FMT_SGBRG10_1X10, .order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE }, { VIMC_DEB_RED, VIMC_DEB_GREEN } } }, { .pixelformat = V4L2_PIX_FMT_SGRBG10, .code = MEDIA_BUS_FMT_SGRBG10_1X10, .order = { { VIMC_DEB_GREEN, VIMC_DEB_RED }, { VIMC_DEB_BLUE, VIMC_DEB_GREEN } } }, { .pixelformat = V4L2_PIX_FMT_SRGGB10, .code = MEDIA_BUS_FMT_SRGGB10_1X10, .order = { { VIMC_DEB_RED, VIMC_DEB_GREEN }, { VIMC_DEB_GREEN, VIMC_DEB_BLUE } } }, { .pixelformat = V4L2_PIX_FMT_SBGGR12, .code = MEDIA_BUS_FMT_SBGGR12_1X12, .order = { { VIMC_DEB_BLUE, VIMC_DEB_GREEN }, { VIMC_DEB_GREEN, VIMC_DEB_RED } } }, { .pixelformat = V4L2_PIX_FMT_SGBRG12, .code = MEDIA_BUS_FMT_SGBRG12_1X12, .order = { { VIMC_DEB_GREEN, VIMC_DEB_BLUE }, { VIMC_DEB_RED, VIMC_DEB_GREEN } } }, { .pixelformat = V4L2_PIX_FMT_SGRBG12, .code = MEDIA_BUS_FMT_SGRBG12_1X12, .order = { { VIMC_DEB_GREEN, VIMC_DEB_RED }, { VIMC_DEB_BLUE, VIMC_DEB_GREEN } } }, { .pixelformat = V4L2_PIX_FMT_SRGGB12, .code = MEDIA_BUS_FMT_SRGGB12_1X12, .order = { { VIMC_DEB_RED, VIMC_DEB_GREEN }, { VIMC_DEB_GREEN, VIMC_DEB_BLUE } } }, }; static const struct vimc_deb_pix_map *vimc_deb_pix_map_by_code(u32 code) { unsigned int i; for (i = 0; i < ARRAY_SIZE(vimc_deb_pix_map_list); i++) if (vimc_deb_pix_map_list[i].code == code) return &vimc_deb_pix_map_list[i]; return NULL; } static int vimc_deb_init_cfg(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg) { struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *mf; unsigned int i; mf = v4l2_subdev_get_try_format(sd, cfg, 0); *mf = sink_fmt_default; for (i = 1; i < sd->entity.num_pads; i++) { mf = v4l2_subdev_get_try_format(sd, cfg, i); *mf = sink_fmt_default; mf->code = vdeb->src_code; } return 0; } static int vimc_deb_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { /* For the sink pad we only support codes in the map_list */ if (IS_SINK(code->pad)) { if (code->index >= ARRAY_SIZE(vimc_deb_pix_map_list)) return -EINVAL; code->code = vimc_deb_pix_map_list[code->index].code; return 0; } return vimc_enum_mbus_code(sd, cfg, code); } static int vimc_deb_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { if (fse->index) return -EINVAL; /* For the sink pad we only support codes in the map_list */ if (IS_SINK(fse->pad)) { const struct vimc_deb_pix_map *vpix = vimc_deb_pix_map_by_code(fse->code); if (!vpix) return -EINVAL; } fse->min_width = VIMC_FRAME_MIN_WIDTH; fse->max_width = VIMC_FRAME_MAX_WIDTH; fse->min_height = VIMC_FRAME_MIN_HEIGHT; fse->max_height = VIMC_FRAME_MAX_HEIGHT; return 0; } static int vimc_deb_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd); /* Get the current sink format */ fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ? *v4l2_subdev_get_try_format(sd, cfg, 0) : vdeb->sink_fmt; /* Set the right code for the source pad */ if (IS_SRC(fmt->pad)) fmt->format.code = vdeb->src_code; return 0; } static void vimc_deb_adjust_sink_fmt(struct v4l2_mbus_framefmt *fmt) { const struct vimc_deb_pix_map *vpix; /* Don't accept a code that is not on the debayer table */ vpix = vimc_deb_pix_map_by_code(fmt->code); if (!vpix) fmt->code = sink_fmt_default.code; fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH, VIMC_FRAME_MAX_WIDTH) & ~1; fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT, VIMC_FRAME_MAX_HEIGHT) & ~1; if (fmt->field == V4L2_FIELD_ANY) fmt->field = sink_fmt_default.field; vimc_colorimetry_clamp(fmt); } static int vimc_deb_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *sink_fmt; if (!vimc_mbus_code_supported(fmt->format.code)) fmt->format.code = sink_fmt_default.code; if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { /* Do not change the format while stream is on */ if (vdeb->src_frame) return -EBUSY; sink_fmt = &vdeb->sink_fmt; } else { sink_fmt = v4l2_subdev_get_try_format(sd, cfg, 0); } /* * Do not change the format of the source pad, * it is propagated from the sink (except for the code) */ if (IS_SRC(fmt->pad)) { vdeb->src_code = fmt->format.code; fmt->format = *sink_fmt; fmt->format.code = vdeb->src_code; } else { /* Set the new format in the sink pad */ vimc_deb_adjust_sink_fmt(&fmt->format); dev_dbg(vdeb->dev, "%s: sink format update: " "old:%dx%d (0x%x, %d, %d, %d, %d) " "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vdeb->sd.name, /* old */ sink_fmt->width, sink_fmt->height, sink_fmt->code, sink_fmt->colorspace, sink_fmt->quantization, sink_fmt->xfer_func, sink_fmt->ycbcr_enc, /* new */ fmt->format.width, fmt->format.height, fmt->format.code, fmt->format.colorspace, fmt->format.quantization, fmt->format.xfer_func, fmt->format.ycbcr_enc); *sink_fmt = fmt->format; } return 0; } static const struct v4l2_subdev_pad_ops vimc_deb_pad_ops = { .init_cfg = vimc_deb_init_cfg, .enum_mbus_code = vimc_deb_enum_mbus_code, .enum_frame_size = vimc_deb_enum_frame_size, .get_fmt = vimc_deb_get_fmt, .set_fmt = vimc_deb_set_fmt, }; static void vimc_deb_set_rgb_pix_rgb24(struct vimc_deb_device *vdeb, unsigned int lin, unsigned int col, unsigned int rgb[3]) { unsigned int i, index; index = VIMC_FRAME_INDEX(lin, col, vdeb->sink_fmt.width, 3); for (i = 0; i < 3; i++) vdeb->src_frame[index + i] = rgb[i]; } static int vimc_deb_s_stream(struct v4l2_subdev *sd, int enable) { struct vimc_deb_device *vdeb = v4l2_get_subdevdata(sd); if (enable) { u32 src_pixelformat = vdeb->ved.stream->producer_pixfmt; const struct v4l2_format_info *pix_info; unsigned int frame_size; if (vdeb->src_frame) return 0; /* We only support translating bayer to RGB24 */ if (src_pixelformat != V4L2_PIX_FMT_RGB24) { dev_err(vdeb->dev, "translating to pixfmt (0x%08x) is not supported\n", src_pixelformat); return -EINVAL; } /* Get the corresponding pixel map from the table */ vdeb->sink_pix_map = vimc_deb_pix_map_by_code(vdeb->sink_fmt.code); /* Request bayer format from the pipeline for the sink pad */ vdeb->ved.stream->producer_pixfmt = vdeb->sink_pix_map->pixelformat; /* Calculate frame_size of the source */ pix_info = v4l2_format_info(src_pixelformat); frame_size = vdeb->sink_fmt.width * vdeb->sink_fmt.height * pix_info->bpp[0]; /* Get bpp from the sink */ pix_info = v4l2_format_info(vdeb->sink_pix_map->pixelformat); vdeb->sink_bpp = pix_info->bpp[0]; /* * Allocate the frame buffer. Use vmalloc to be able to * allocate a large amount of memory */ vdeb->src_frame = vmalloc(frame_size); if (!vdeb->src_frame) return -ENOMEM; } else { if (!vdeb->src_frame) return 0; vfree(vdeb->src_frame); vdeb->src_frame = NULL; } return 0; } static const struct v4l2_subdev_video_ops vimc_deb_video_ops = { .s_stream = vimc_deb_s_stream, }; static const struct v4l2_subdev_ops vimc_deb_ops = { .pad = &vimc_deb_pad_ops, .video = &vimc_deb_video_ops, }; static unsigned int vimc_deb_get_val(const u8 *bytes, const unsigned int n_bytes) { unsigned int i; unsigned int acc = 0; for (i = 0; i < n_bytes; i++) acc = acc + (bytes[i] << (8 * i)); return acc; } static void vimc_deb_calc_rgb_sink(struct vimc_deb_device *vdeb, const u8 *frame, const unsigned int lin, const unsigned int col, unsigned int rgb[3]) { unsigned int i, seek, wlin, wcol; unsigned int n_rgb[3] = {0, 0, 0}; for (i = 0; i < 3; i++) rgb[i] = 0; /* * Calculate how many we need to subtract to get to the pixel in * the top left corner of the mean window (considering the current * pixel as the center) */ seek = deb_mean_win_size / 2; /* Sum the values of the colors in the mean window */ dev_dbg(vdeb->dev, "deb: %s: --- Calc pixel %dx%d, window mean %d, seek %d ---\n", vdeb->sd.name, lin, col, vdeb->sink_fmt.height, seek); /* * Iterate through all the lines in the mean window, start * with zero if the pixel is outside the frame and don't pass * the height when the pixel is in the bottom border of the * frame */ for (wlin = seek > lin ? 0 : lin - seek; wlin < lin + seek + 1 && wlin < vdeb->sink_fmt.height; wlin++) { /* * Iterate through all the columns in the mean window, start * with zero if the pixel is outside the frame and don't pass * the width when the pixel is in the right border of the * frame */ for (wcol = seek > col ? 0 : col - seek; wcol < col + seek + 1 && wcol < vdeb->sink_fmt.width; wcol++) { enum vimc_deb_rgb_colors color; unsigned int index; /* Check which color this pixel is */ color = vdeb->sink_pix_map->order[wlin % 2][wcol % 2]; index = VIMC_FRAME_INDEX(wlin, wcol, vdeb->sink_fmt.width, vdeb->sink_bpp); dev_dbg(vdeb->dev, "deb: %s: RGB CALC: frame index %d, win pos %dx%d, color %d\n", vdeb->sd.name, index, wlin, wcol, color); /* Get its value */ rgb[color] = rgb[color] + vimc_deb_get_val(&frame[index], vdeb->sink_bpp); /* Save how many values we already added */ n_rgb[color]++; dev_dbg(vdeb->dev, "deb: %s: RGB CALC: val %d, n %d\n", vdeb->sd.name, rgb[color], n_rgb[color]); } } /* Calculate the mean */ for (i = 0; i < 3; i++) { dev_dbg(vdeb->dev, "deb: %s: PRE CALC: %dx%d Color %d, val %d, n %d\n", vdeb->sd.name, lin, col, i, rgb[i], n_rgb[i]); if (n_rgb[i]) rgb[i] = rgb[i] / n_rgb[i]; dev_dbg(vdeb->dev, "deb: %s: FINAL CALC: %dx%d Color %d, val %d\n", vdeb->sd.name, lin, col, i, rgb[i]); } } static void *vimc_deb_process_frame(struct vimc_ent_device *ved, const void *sink_frame) { struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device, ved); unsigned int rgb[3]; unsigned int i, j; /* If the stream in this node is not active, just return */ if (!vdeb->src_frame) return ERR_PTR(-EINVAL); for (i = 0; i < vdeb->sink_fmt.height; i++) for (j = 0; j < vdeb->sink_fmt.width; j++) { vimc_deb_calc_rgb_sink(vdeb, sink_frame, i, j, rgb); vdeb->set_rgb_src(vdeb, i, j, rgb); } return vdeb->src_frame; } static void vimc_deb_release(struct v4l2_subdev *sd) { struct vimc_deb_device *vdeb = container_of(sd, struct vimc_deb_device, sd); kfree(vdeb); } static const struct v4l2_subdev_internal_ops vimc_deb_int_ops = { .release = vimc_deb_release, }; static void vimc_deb_comp_unbind(struct device *comp, struct device *master, void *master_data) { struct vimc_ent_device *ved = dev_get_drvdata(comp); struct vimc_deb_device *vdeb = container_of(ved, struct vimc_deb_device, ved); vimc_ent_sd_unregister(ved, &vdeb->sd); } static int vimc_deb_comp_bind(struct device *comp, struct device *master, void *master_data) { struct v4l2_device *v4l2_dev = master_data; struct vimc_platform_data *pdata = comp->platform_data; struct vimc_deb_device *vdeb; int ret; /* Allocate the vdeb struct */ vdeb = kzalloc(sizeof(*vdeb), GFP_KERNEL); if (!vdeb) return -ENOMEM; /* Initialize ved and sd */ ret = vimc_ent_sd_register(&vdeb->ved, &vdeb->sd, v4l2_dev, pdata->entity_name, MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV, 2, (const unsigned long[2]) {MEDIA_PAD_FL_SINK, MEDIA_PAD_FL_SOURCE}, &vimc_deb_int_ops, &vimc_deb_ops); if (ret) { kfree(vdeb); return ret; } vdeb->ved.process_frame = vimc_deb_process_frame; dev_set_drvdata(comp, &vdeb->ved); vdeb->dev = comp; /* Initialize the frame format */ vdeb->sink_fmt = sink_fmt_default; vdeb->src_code = VIMC_DEB_SRC_MBUS_FMT_DEFAULT; /* * TODO: Add support for more output formats, we only support * RGB24 for now. * NOTE: the src format is always the same as the sink, except * for the code */ vdeb->set_rgb_src = vimc_deb_set_rgb_pix_rgb24; return 0; } static const struct component_ops vimc_deb_comp_ops = { .bind = vimc_deb_comp_bind, .unbind = vimc_deb_comp_unbind, }; static int vimc_deb_probe(struct platform_device *pdev) { return component_add(&pdev->dev, &vimc_deb_comp_ops); } static int vimc_deb_remove(struct platform_device *pdev) { component_del(&pdev->dev, &vimc_deb_comp_ops); return 0; } static const struct platform_device_id vimc_deb_driver_ids[] = { { .name = VIMC_DEB_DRV_NAME, }, { } }; static struct platform_driver vimc_deb_pdrv = { .probe = vimc_deb_probe, .remove = vimc_deb_remove, .id_table = vimc_deb_driver_ids, .driver = { .name = VIMC_DEB_DRV_NAME, }, }; module_platform_driver(vimc_deb_pdrv); MODULE_DEVICE_TABLE(platform, vimc_deb_driver_ids); MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Debayer"); MODULE_AUTHOR("Helen Mae Koike Fornazier "); MODULE_LICENSE("GPL");