/* * vimc-common.c Virtual Media Controller Driver * * Copyright (C) 2015-2017 Helen Koike * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include "vimc-common.h" /* * NOTE: non-bayer formats need to come first (necessary for enum_mbus_code * in the scaler) */ static const struct vimc_pix_map vimc_pix_map_list[] = { /* TODO: add all missing formats */ /* RGB formats */ { .code = MEDIA_BUS_FMT_BGR888_1X24, .pixelformat = V4L2_PIX_FMT_BGR24, .bpp = 3, .bayer = false, }, { .code = MEDIA_BUS_FMT_RGB888_1X24, .pixelformat = V4L2_PIX_FMT_RGB24, .bpp = 3, .bayer = false, }, { .code = MEDIA_BUS_FMT_ARGB8888_1X32, .pixelformat = V4L2_PIX_FMT_ARGB32, .bpp = 4, .bayer = false, }, /* Bayer formats */ { .code = MEDIA_BUS_FMT_SBGGR8_1X8, .pixelformat = V4L2_PIX_FMT_SBGGR8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGBRG8_1X8, .pixelformat = V4L2_PIX_FMT_SGBRG8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGRBG8_1X8, .pixelformat = V4L2_PIX_FMT_SGRBG8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SRGGB8_1X8, .pixelformat = V4L2_PIX_FMT_SRGGB8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SBGGR10_1X10, .pixelformat = V4L2_PIX_FMT_SBGGR10, .bpp = 2, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGBRG10_1X10, .pixelformat = V4L2_PIX_FMT_SGBRG10, .bpp = 2, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGRBG10_1X10, .pixelformat = V4L2_PIX_FMT_SGRBG10, .bpp = 2, .bayer = true, }, { .code = MEDIA_BUS_FMT_SRGGB10_1X10, .pixelformat = V4L2_PIX_FMT_SRGGB10, .bpp = 2, .bayer = true, }, /* 10bit raw bayer a-law compressed to 8 bits */ { .code = MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8, .pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8, .pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8, .pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8, .pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8, .bpp = 1, .bayer = true, }, /* 10bit raw bayer DPCM compressed to 8 bits */ { .code = MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, .pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, .pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, .pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, .pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8, .bpp = 1, .bayer = true, }, { .code = MEDIA_BUS_FMT_SBGGR12_1X12, .pixelformat = V4L2_PIX_FMT_SBGGR12, .bpp = 2, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGBRG12_1X12, .pixelformat = V4L2_PIX_FMT_SGBRG12, .bpp = 2, .bayer = true, }, { .code = MEDIA_BUS_FMT_SGRBG12_1X12, .pixelformat = V4L2_PIX_FMT_SGRBG12, .bpp = 2, .bayer = true, }, { .code = MEDIA_BUS_FMT_SRGGB12_1X12, .pixelformat = V4L2_PIX_FMT_SRGGB12, .bpp = 2, .bayer = true, }, }; const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i) { if (i >= ARRAY_SIZE(vimc_pix_map_list)) return NULL; return &vimc_pix_map_list[i]; } EXPORT_SYMBOL_GPL(vimc_pix_map_by_index); const struct vimc_pix_map *vimc_pix_map_by_code(u32 code) { unsigned int i; for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) { if (vimc_pix_map_list[i].code == code) return &vimc_pix_map_list[i]; } return NULL; } EXPORT_SYMBOL_GPL(vimc_pix_map_by_code); const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat) { unsigned int i; for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) { if (vimc_pix_map_list[i].pixelformat == pixelformat) return &vimc_pix_map_list[i]; } return NULL; } EXPORT_SYMBOL_GPL(vimc_pix_map_by_pixelformat); /* Helper function to allocate and initialize pads */ struct media_pad *vimc_pads_init(u16 num_pads, const unsigned long *pads_flag) { struct media_pad *pads; unsigned int i; /* Allocate memory for the pads */ pads = kcalloc(num_pads, sizeof(*pads), GFP_KERNEL); if (!pads) return ERR_PTR(-ENOMEM); /* Initialize the pads */ for (i = 0; i < num_pads; i++) { pads[i].index = i; pads[i].flags = pads_flag[i]; } return pads; } EXPORT_SYMBOL_GPL(vimc_pads_init); int vimc_pipeline_s_stream(struct media_entity *ent, int enable) { struct v4l2_subdev *sd; struct media_pad *pad; unsigned int i; int ret; for (i = 0; i < ent->num_pads; i++) { if (ent->pads[i].flags & MEDIA_PAD_FL_SOURCE) continue; /* Start the stream in the subdevice direct connected */ pad = media_entity_remote_pad(&ent->pads[i]); if (!pad) continue; if (!is_media_entity_v4l2_subdev(pad->entity)) return -EINVAL; sd = media_entity_to_v4l2_subdev(pad->entity); ret = v4l2_subdev_call(sd, video, s_stream, enable); if (ret && ret != -ENOIOCTLCMD) return ret; } return 0; } EXPORT_SYMBOL_GPL(vimc_pipeline_s_stream); static int vimc_get_mbus_format(struct media_pad *pad, struct v4l2_subdev_format *fmt) { if (is_media_entity_v4l2_subdev(pad->entity)) { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(pad->entity); int ret; fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; fmt->pad = pad->index; ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt); if (ret) return ret; } else if (is_media_entity_v4l2_video_device(pad->entity)) { struct video_device *vdev = container_of(pad->entity, struct video_device, entity); struct vimc_ent_device *ved = video_get_drvdata(vdev); const struct vimc_pix_map *vpix; struct v4l2_pix_format vdev_fmt; if (!ved->vdev_get_format) return -ENOIOCTLCMD; ved->vdev_get_format(ved, &vdev_fmt); vpix = vimc_pix_map_by_pixelformat(vdev_fmt.pixelformat); v4l2_fill_mbus_format(&fmt->format, &vdev_fmt, vpix->code); } else { return -EINVAL; } return 0; } int vimc_link_validate(struct media_link *link) { struct v4l2_subdev_format source_fmt, sink_fmt; int ret; ret = vimc_get_mbus_format(link->source, &source_fmt); if (ret) return ret; ret = vimc_get_mbus_format(link->sink, &sink_fmt); if (ret) return ret; pr_info("vimc link validate: " "%s:src:%dx%d (0x%x, %d, %d, %d, %d) " "%s:snk:%dx%d (0x%x, %d, %d, %d, %d)\n", /* src */ link->source->entity->name, source_fmt.format.width, source_fmt.format.height, source_fmt.format.code, source_fmt.format.colorspace, source_fmt.format.quantization, source_fmt.format.xfer_func, source_fmt.format.ycbcr_enc, /* sink */ link->sink->entity->name, sink_fmt.format.width, sink_fmt.format.height, sink_fmt.format.code, sink_fmt.format.colorspace, sink_fmt.format.quantization, sink_fmt.format.xfer_func, sink_fmt.format.ycbcr_enc); /* The width, height and code must match. */ if (source_fmt.format.width != sink_fmt.format.width || source_fmt.format.height != sink_fmt.format.height || source_fmt.format.code != sink_fmt.format.code) return -EPIPE; /* * The field order must match, or the sink field order must be NONE * to support interlaced hardware connected to bridges that support * progressive formats only. */ if (source_fmt.format.field != sink_fmt.format.field && sink_fmt.format.field != V4L2_FIELD_NONE) return -EPIPE; /* * If colorspace is DEFAULT, then assume all the colorimetry is also * DEFAULT, return 0 to skip comparing the other colorimetry parameters */ if (source_fmt.format.colorspace == V4L2_COLORSPACE_DEFAULT || sink_fmt.format.colorspace == V4L2_COLORSPACE_DEFAULT) return 0; /* Colorspace must match. */ if (source_fmt.format.colorspace != sink_fmt.format.colorspace) return -EPIPE; /* Colorimetry must match if they are not set to DEFAULT */ if (source_fmt.format.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT && sink_fmt.format.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT && source_fmt.format.ycbcr_enc != sink_fmt.format.ycbcr_enc) return -EPIPE; if (source_fmt.format.quantization != V4L2_QUANTIZATION_DEFAULT && sink_fmt.format.quantization != V4L2_QUANTIZATION_DEFAULT && source_fmt.format.quantization != sink_fmt.format.quantization) return -EPIPE; if (source_fmt.format.xfer_func != V4L2_XFER_FUNC_DEFAULT && sink_fmt.format.xfer_func != V4L2_XFER_FUNC_DEFAULT && source_fmt.format.xfer_func != sink_fmt.format.xfer_func) return -EPIPE; return 0; } EXPORT_SYMBOL_GPL(vimc_link_validate); static const struct media_entity_operations vimc_ent_sd_mops = { .link_validate = vimc_link_validate, }; int vimc_ent_sd_register(struct vimc_ent_device *ved, struct v4l2_subdev *sd, struct v4l2_device *v4l2_dev, const char *const name, u32 function, u16 num_pads, const unsigned long *pads_flag, const struct v4l2_subdev_ops *sd_ops) { int ret; /* Allocate the pads */ ved->pads = vimc_pads_init(num_pads, pads_flag); if (IS_ERR(ved->pads)) return PTR_ERR(ved->pads); /* Fill the vimc_ent_device struct */ ved->ent = &sd->entity; /* Initialize the subdev */ v4l2_subdev_init(sd, sd_ops); sd->entity.function = function; sd->entity.ops = &vimc_ent_sd_mops; sd->owner = THIS_MODULE; strlcpy(sd->name, name, sizeof(sd->name)); v4l2_set_subdevdata(sd, ved); /* Expose this subdev to user space */ sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE; /* Initialize the media entity */ ret = media_entity_pads_init(&sd->entity, num_pads, ved->pads); if (ret) goto err_clean_pads; /* Register the subdev with the v4l2 and the media framework */ ret = v4l2_device_register_subdev(v4l2_dev, sd); if (ret) { dev_err(v4l2_dev->dev, "%s: subdev register failed (err=%d)\n", name, ret); goto err_clean_m_ent; } return 0; err_clean_m_ent: media_entity_cleanup(&sd->entity); err_clean_pads: vimc_pads_cleanup(ved->pads); return ret; } EXPORT_SYMBOL_GPL(vimc_ent_sd_register); void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd) { v4l2_device_unregister_subdev(sd); media_entity_cleanup(ved->ent); vimc_pads_cleanup(ved->pads); } EXPORT_SYMBOL_GPL(vimc_ent_sd_unregister); MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Common"); MODULE_AUTHOR("Helen Koike "); MODULE_LICENSE("GPL");