diff options
Diffstat (limited to 'drivers/media/platform/vimc/vimc-common.c')
| -rw-r--r-- | drivers/media/platform/vimc/vimc-common.c | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/drivers/media/platform/vimc/vimc-common.c b/drivers/media/platform/vimc/vimc-common.c new file mode 100644 index 000000000000..9d63c84a9876 --- /dev/null +++ b/drivers/media/platform/vimc/vimc-common.c @@ -0,0 +1,473 @@ +/* + * vimc-common.c Virtual Media Controller Driver + * + * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com> + * + * 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 <linux/init.h> +#include <linux/module.h> + +#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); + +int vimc_propagate_frame(struct media_pad *src, const void *frame) +{ + struct media_link *link; + + if (!(src->flags & MEDIA_PAD_FL_SOURCE)) + return -EINVAL; + + /* Send this frame to all sink pads that are direct linked */ + list_for_each_entry(link, &src->entity->links, list) { + if (link->source == src && + (link->flags & MEDIA_LNK_FL_ENABLED)) { + struct vimc_ent_device *ved = NULL; + struct media_entity *entity = link->sink->entity; + + if (is_media_entity_v4l2_subdev(entity)) { + struct v4l2_subdev *sd = + container_of(entity, struct v4l2_subdev, + entity); + ved = v4l2_get_subdevdata(sd); + } else if (is_media_entity_v4l2_video_device(entity)) { + struct video_device *vdev = + container_of(entity, + struct video_device, + entity); + ved = video_get_drvdata(vdev); + } + if (ved && ved->process_frame) + ved->process_frame(ved, link->sink, frame); + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(vimc_propagate_frame); + +/* 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 (!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 <helen.fornazier@gmail.com>"); +MODULE_LICENSE("GPL"); |