diff options
Diffstat (limited to 'drivers/staging/media/davinci_vpfe/vpfe_video.c')
| -rw-r--r-- | drivers/staging/media/davinci_vpfe/vpfe_video.c | 1636 |
1 files changed, 1636 insertions, 0 deletions
diff --git a/drivers/staging/media/davinci_vpfe/vpfe_video.c b/drivers/staging/media/davinci_vpfe/vpfe_video.c new file mode 100644 index 000000000..06d48d5eb --- /dev/null +++ b/drivers/staging/media/davinci_vpfe/vpfe_video.c @@ -0,0 +1,1636 @@ +/* + * Copyright (C) 2012 Texas Instruments Inc + * + * 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 version 2. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Contributors: + * Manjunath Hadli <manjunath.hadli@ti.com> + * Prabhakar Lad <prabhakar.lad@ti.com> + */ + +#include <linux/module.h> +#include <linux/slab.h> + +#include <media/v4l2-ioctl.h> + +#include "vpfe.h" +#include "vpfe_mc_capture.h" + +/* minimum number of buffers needed in cont-mode */ +#define MIN_NUM_BUFFERS 3 + +static int debug; + +/* get v4l2 subdev pointer to external subdev which is active */ +static struct media_entity *vpfe_get_input_entity + (struct vpfe_video_device *video) +{ + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct media_pad *remote; + + remote = media_entity_remote_pad(&vpfe_dev->vpfe_isif.pads[0]); + if (remote == NULL) { + pr_err("Invalid media connection to isif/ccdc\n"); + return NULL; + } + return remote->entity; +} + +/* updates external subdev(sensor/decoder) which is active */ +static int vpfe_update_current_ext_subdev(struct vpfe_video_device *video) +{ + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_config *vpfe_cfg; + struct v4l2_subdev *subdev; + struct media_pad *remote; + int i; + + remote = media_entity_remote_pad(&vpfe_dev->vpfe_isif.pads[0]); + if (remote == NULL) { + pr_err("Invalid media connection to isif/ccdc\n"); + return -EINVAL; + } + + subdev = media_entity_to_v4l2_subdev(remote->entity); + vpfe_cfg = vpfe_dev->pdev->platform_data; + for (i = 0; i < vpfe_cfg->num_subdevs; i++) { + if (!strcmp(vpfe_cfg->sub_devs[i].module_name, subdev->name)) { + video->current_ext_subdev = &vpfe_cfg->sub_devs[i]; + break; + } + } + + /* if user not linked decoder/sensor to isif/ccdc */ + if (i == vpfe_cfg->num_subdevs) { + pr_err("Invalid media chain connection to isif/ccdc\n"); + return -EINVAL; + } + /* find the v4l2 subdev pointer */ + for (i = 0; i < vpfe_dev->num_ext_subdevs; i++) { + if (!strcmp(video->current_ext_subdev->module_name, + vpfe_dev->sd[i]->name)) + video->current_ext_subdev->subdev = vpfe_dev->sd[i]; + } + return 0; +} + +/* get the subdev which is connected to the output video node */ +static struct v4l2_subdev * +vpfe_video_remote_subdev(struct vpfe_video_device *video, u32 *pad) +{ + struct media_pad *remote = media_entity_remote_pad(&video->pad); + + if (remote == NULL || remote->entity->type != MEDIA_ENT_T_V4L2_SUBDEV) + return NULL; + if (pad) + *pad = remote->index; + return media_entity_to_v4l2_subdev(remote->entity); +} + +/* get the format set at output pad of the adjacent subdev */ +static int +__vpfe_video_get_format(struct vpfe_video_device *video, + struct v4l2_format *format) +{ + struct v4l2_subdev_format fmt; + struct v4l2_subdev *subdev; + struct media_pad *remote; + u32 pad; + int ret; + + subdev = vpfe_video_remote_subdev(video, &pad); + if (subdev == NULL) + return -EINVAL; + + fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; + remote = media_entity_remote_pad(&video->pad); + fmt.pad = remote->index; + + ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); + if (ret == -ENOIOCTLCMD) + return -EINVAL; + + format->type = video->type; + /* convert mbus_format to v4l2_format */ + v4l2_fill_pix_format(&format->fmt.pix, &fmt.format); + mbus_to_pix(&fmt.format, &format->fmt.pix); + + return 0; +} + +/* make a note of pipeline details */ +static void vpfe_prepare_pipeline(struct vpfe_video_device *video) +{ + struct media_entity *entity = &video->video_dev.entity; + struct media_device *mdev = entity->parent; + struct vpfe_pipeline *pipe = &video->pipe; + struct vpfe_video_device *far_end = NULL; + struct media_entity_graph graph; + + pipe->input_num = 0; + pipe->output_num = 0; + + if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) + pipe->inputs[pipe->input_num++] = video; + else + pipe->outputs[pipe->output_num++] = video; + + mutex_lock(&mdev->graph_mutex); + media_entity_graph_walk_start(&graph, entity); + while ((entity = media_entity_graph_walk_next(&graph))) { + if (entity == &video->video_dev.entity) + continue; + if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) + continue; + far_end = to_vpfe_video(media_entity_to_video_device(entity)); + if (far_end->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) + pipe->inputs[pipe->input_num++] = far_end; + else + pipe->outputs[pipe->output_num++] = far_end; + } + mutex_unlock(&mdev->graph_mutex); +} + +/* update pipe state selected by user */ +static int vpfe_update_pipe_state(struct vpfe_video_device *video) +{ + struct vpfe_pipeline *pipe = &video->pipe; + int ret; + + vpfe_prepare_pipeline(video); + + /* Find out if there is any input video + if yes, it is single shot. + */ + if (pipe->input_num == 0) { + pipe->state = VPFE_PIPELINE_STREAM_CONTINUOUS; + ret = vpfe_update_current_ext_subdev(video); + if (ret) { + pr_err("Invalid external subdev\n"); + return ret; + } + } else { + pipe->state = VPFE_PIPELINE_STREAM_SINGLESHOT; + } + video->initialized = 1; + video->skip_frame_count = 1; + video->skip_frame_count_init = 1; + return 0; +} + +/* checks wether pipeline is ready for enabling */ +int vpfe_video_is_pipe_ready(struct vpfe_pipeline *pipe) +{ + int i; + + for (i = 0; i < pipe->input_num; i++) + if (!pipe->inputs[i]->started || + pipe->inputs[i]->state != VPFE_VIDEO_BUFFER_QUEUED) + return 0; + for (i = 0; i < pipe->output_num; i++) + if (!pipe->outputs[i]->started || + pipe->outputs[i]->state != VPFE_VIDEO_BUFFER_QUEUED) + return 0; + return 1; +} + +/** + * Validate a pipeline by checking both ends of all links for format + * discrepancies. + * + * Return 0 if all formats match, or -EPIPE if at least one link is found with + * different formats on its two ends. + */ +static int vpfe_video_validate_pipeline(struct vpfe_pipeline *pipe) +{ + struct v4l2_subdev_format fmt_source; + struct v4l2_subdev_format fmt_sink; + struct v4l2_subdev *subdev; + struct media_pad *pad; + int ret; + + /* + * Should not matter if it is output[0] or 1 as + * the general ideas is to traverse backwards and + * the fact that the out video node always has the + * format of the connected pad. + */ + subdev = vpfe_video_remote_subdev(pipe->outputs[0], NULL); + if (subdev == NULL) + return -EPIPE; + + while (1) { + /* Retrieve the sink format */ + pad = &subdev->entity.pads[0]; + if (!(pad->flags & MEDIA_PAD_FL_SINK)) + break; + + fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE; + fmt_sink.pad = pad->index; + ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, + &fmt_sink); + + if (ret < 0 && ret != -ENOIOCTLCMD) + return -EPIPE; + + /* Retrieve the source format */ + pad = media_entity_remote_pad(pad); + if (pad == NULL || + pad->entity->type != MEDIA_ENT_T_V4L2_SUBDEV) + break; + + subdev = media_entity_to_v4l2_subdev(pad->entity); + + fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE; + fmt_source.pad = pad->index; + ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source); + if (ret < 0 && ret != -ENOIOCTLCMD) + return -EPIPE; + + /* Check if the two ends match */ + if (fmt_source.format.code != fmt_sink.format.code || + fmt_source.format.width != fmt_sink.format.width || + fmt_source.format.height != fmt_sink.format.height) + return -EPIPE; + } + return 0; +} + +/* + * vpfe_pipeline_enable() - Enable streaming on a pipeline + * @vpfe_dev: vpfe device + * @pipe: vpfe pipeline + * + * Walk the entities chain starting at the pipeline output video node and start + * all modules in the chain in the given mode. + * + * Return 0 if successful, or the return value of the failed video::s_stream + * operation otherwise. + */ +static int vpfe_pipeline_enable(struct vpfe_pipeline *pipe) +{ + struct media_entity_graph graph; + struct media_entity *entity; + struct v4l2_subdev *subdev; + struct media_device *mdev; + int ret = 0; + + if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) + entity = vpfe_get_input_entity(pipe->outputs[0]); + else + entity = &pipe->inputs[0]->video_dev.entity; + + mdev = entity->parent; + mutex_lock(&mdev->graph_mutex); + media_entity_graph_walk_start(&graph, entity); + while ((entity = media_entity_graph_walk_next(&graph))) { + + if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE) + continue; + subdev = media_entity_to_v4l2_subdev(entity); + ret = v4l2_subdev_call(subdev, video, s_stream, 1); + if (ret < 0 && ret != -ENOIOCTLCMD) + break; + } + mutex_unlock(&mdev->graph_mutex); + return ret; +} + +/* + * vpfe_pipeline_disable() - Disable streaming on a pipeline + * @vpfe_dev: vpfe device + * @pipe: VPFE pipeline + * + * Walk the entities chain starting at the pipeline output video node and stop + * all modules in the chain. + * + * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module + * can't be stopped. + */ +static int vpfe_pipeline_disable(struct vpfe_pipeline *pipe) +{ + struct media_entity_graph graph; + struct media_entity *entity; + struct v4l2_subdev *subdev; + struct media_device *mdev; + int ret = 0; + + if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) + entity = vpfe_get_input_entity(pipe->outputs[0]); + else + entity = &pipe->inputs[0]->video_dev.entity; + + mdev = entity->parent; + mutex_lock(&mdev->graph_mutex); + media_entity_graph_walk_start(&graph, entity); + + while ((entity = media_entity_graph_walk_next(&graph))) { + + if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE) + continue; + subdev = media_entity_to_v4l2_subdev(entity); + ret = v4l2_subdev_call(subdev, video, s_stream, 0); + if (ret < 0 && ret != -ENOIOCTLCMD) + break; + } + mutex_unlock(&mdev->graph_mutex); + + return ret ? -ETIMEDOUT : 0; +} + +/* + * vpfe_pipeline_set_stream() - Enable/disable streaming on a pipeline + * @vpfe_dev: VPFE device + * @pipe: VPFE pipeline + * @state: Stream state (stopped or active) + * + * Set the pipeline to the given stream state. + * + * Return 0 if successful, or the return value of the failed video::s_stream + * operation otherwise. + */ +static int vpfe_pipeline_set_stream(struct vpfe_pipeline *pipe, + enum vpfe_pipeline_stream_state state) +{ + if (state == VPFE_PIPELINE_STREAM_STOPPED) + return vpfe_pipeline_disable(pipe); + + return vpfe_pipeline_enable(pipe); +} + +static int all_videos_stopped(struct vpfe_video_device *video) +{ + struct vpfe_pipeline *pipe = &video->pipe; + int i; + + for (i = 0; i < pipe->input_num; i++) + if (pipe->inputs[i]->started) + return 0; + for (i = 0; i < pipe->output_num; i++) + if (pipe->outputs[i]->started) + return 0; + return 1; +} + +/* + * vpfe_open() - open video device + * @file: file pointer + * + * initialize media pipeline state, allocate memory for file handle + * + * Return 0 if successful, or the return -ENODEV otherwise. + */ +static int vpfe_open(struct file *file) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_fh *handle; + + /* Allocate memory for the file handle object */ + handle = kzalloc(sizeof(struct vpfe_fh), GFP_KERNEL); + + if (handle == NULL) + return -ENOMEM; + + v4l2_fh_init(&handle->vfh, &video->video_dev); + v4l2_fh_add(&handle->vfh); + + mutex_lock(&video->lock); + /* If decoder is not initialized. initialize it */ + if (!video->initialized && vpfe_update_pipe_state(video)) { + mutex_unlock(&video->lock); + return -ENODEV; + } + /* Increment device users counter */ + video->usrs++; + /* Set io_allowed member to false */ + handle->io_allowed = 0; + handle->video = video; + file->private_data = &handle->vfh; + mutex_unlock(&video->lock); + + return 0; +} + +/* get the next buffer available from dma queue */ +static unsigned long +vpfe_video_get_next_buffer(struct vpfe_video_device *video) +{ + video->cur_frm = video->next_frm = + list_entry(video->dma_queue.next, + struct vpfe_cap_buffer, list); + + list_del(&video->next_frm->list); + video->next_frm->vb.state = VB2_BUF_STATE_ACTIVE; + return vb2_dma_contig_plane_dma_addr(&video->next_frm->vb, 0); +} + +/* schedule the next buffer which is available on dma queue */ +void vpfe_video_schedule_next_buffer(struct vpfe_video_device *video) +{ + struct vpfe_device *vpfe_dev = video->vpfe_dev; + unsigned long addr; + + if (list_empty(&video->dma_queue)) + return; + + video->next_frm = list_entry(video->dma_queue.next, + struct vpfe_cap_buffer, list); + + if (VPFE_PIPELINE_STREAM_SINGLESHOT == video->pipe.state) + video->cur_frm = video->next_frm; + + list_del(&video->next_frm->list); + video->next_frm->vb.state = VB2_BUF_STATE_ACTIVE; + addr = vb2_dma_contig_plane_dma_addr(&video->next_frm->vb, 0); + video->ops->queue(vpfe_dev, addr); + video->state = VPFE_VIDEO_BUFFER_QUEUED; +} + +/* schedule the buffer for capturing bottom field */ +void vpfe_video_schedule_bottom_field(struct vpfe_video_device *video) +{ + struct vpfe_device *vpfe_dev = video->vpfe_dev; + unsigned long addr; + + addr = vb2_dma_contig_plane_dma_addr(&video->cur_frm->vb, 0); + addr += video->field_off; + video->ops->queue(vpfe_dev, addr); +} + +/* make buffer available for dequeue */ +void vpfe_video_process_buffer_complete(struct vpfe_video_device *video) +{ + struct vpfe_pipeline *pipe = &video->pipe; + + do_gettimeofday(&video->cur_frm->vb.v4l2_buf.timestamp); + vb2_buffer_done(&video->cur_frm->vb, VB2_BUF_STATE_DONE); + if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) + video->cur_frm = video->next_frm; +} + +/* vpfe_stop_capture() - stop streaming */ +static void vpfe_stop_capture(struct vpfe_video_device *video) +{ + struct vpfe_pipeline *pipe = &video->pipe; + + video->started = 0; + + if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) + return; + if (all_videos_stopped(video)) + vpfe_pipeline_set_stream(pipe, + VPFE_PIPELINE_STREAM_STOPPED); +} + +/* + * vpfe_release() - release video device + * @file: file pointer + * + * deletes buffer queue, frees the buffers and the vpfe file handle + * + * Return 0 + */ +static int vpfe_release(struct file *file) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct v4l2_fh *vfh = file->private_data; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_fh *fh = container_of(vfh, struct vpfe_fh, vfh); + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n"); + + /* Get the device lock */ + mutex_lock(&video->lock); + /* if this instance is doing IO */ + if (fh->io_allowed) { + if (video->started) { + vpfe_stop_capture(video); + /* mark pipe state as stopped in vpfe_release(), + as app might call streamon() after streamoff() + in which case driver has to start streaming. + */ + video->pipe.state = VPFE_PIPELINE_STREAM_STOPPED; + vb2_streamoff(&video->buffer_queue, + video->buffer_queue.type); + } + video->io_usrs = 0; + /* Free buffers allocated */ + vb2_queue_release(&video->buffer_queue); + vb2_dma_contig_cleanup_ctx(video->alloc_ctx); + } + /* Decrement device users counter */ + video->usrs--; + v4l2_fh_del(&fh->vfh); + v4l2_fh_exit(&fh->vfh); + /* If this is the last file handle */ + if (!video->usrs) + video->initialized = 0; + mutex_unlock(&video->lock); + file->private_data = NULL; + /* Free memory allocated to file handle object */ + v4l2_fh_del(vfh); + kzfree(fh); + return 0; +} + +/* + * vpfe_mmap() - It is used to map kernel space buffers + * into user spaces + */ +static int vpfe_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n"); + return vb2_mmap(&video->buffer_queue, vma); +} + +/* + * vpfe_poll() - It is used for select/poll system call + */ +static unsigned int vpfe_poll(struct file *file, poll_table *wait) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n"); + if (video->started) + return vb2_poll(&video->buffer_queue, file, wait); + return 0; +} + +/* vpfe capture driver file operations */ +static const struct v4l2_file_operations vpfe_fops = { + .owner = THIS_MODULE, + .open = vpfe_open, + .release = vpfe_release, + .unlocked_ioctl = video_ioctl2, + .mmap = vpfe_mmap, + .poll = vpfe_poll +}; + +/* + * vpfe_querycap() - query capabilities of video device + * @file: file pointer + * @priv: void pointer + * @cap: pointer to v4l2_capability structure + * + * fills v4l2 capabilities structure + * + * Return 0 + */ +static int vpfe_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n"); + + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + else + cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | + V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS; + strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver)); + strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info)); + strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card)); + + return 0; +} + +/* + * vpfe_g_fmt() - get the format which is active on video device + * @file: file pointer + * @priv: void pointer + * @fmt: pointer to v4l2_format structure + * + * fills v4l2 format structure with active format + * + * Return 0 + */ +static int vpfe_g_fmt(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt\n"); + /* Fill in the information about format */ + *fmt = video->fmt; + return 0; +} + +/* + * vpfe_enum_fmt() - enum formats supported on media chain + * @file: file pointer + * @priv: void pointer + * @fmt: pointer to v4l2_fmtdesc structure + * + * fills v4l2_fmtdesc structure with output format set on adjacent subdev, + * only one format is enumearted as subdevs are already configured + * + * Return 0 if successful, error code otherwise + */ +static int vpfe_enum_fmt(struct file *file, void *priv, + struct v4l2_fmtdesc *fmt) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct v4l2_subdev_format sd_fmt; + struct v4l2_mbus_framefmt mbus; + struct v4l2_subdev *subdev; + struct v4l2_format format; + struct media_pad *remote; + int ret; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt\n"); + + /* since already subdev pad format is set, + only one pixel format is available */ + if (fmt->index > 0) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid index\n"); + return -EINVAL; + } + /* get the remote pad */ + remote = media_entity_remote_pad(&video->pad); + if (remote == NULL) { + v4l2_err(&vpfe_dev->v4l2_dev, + "invalid remote pad for video node\n"); + return -EINVAL; + } + /* get the remote subdev */ + subdev = vpfe_video_remote_subdev(video, NULL); + if (subdev == NULL) { + v4l2_err(&vpfe_dev->v4l2_dev, + "invalid remote subdev for video node\n"); + return -EINVAL; + } + sd_fmt.pad = remote->index; + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; + /* get output format of remote subdev */ + ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &sd_fmt); + if (ret) { + v4l2_err(&vpfe_dev->v4l2_dev, + "invalid remote subdev for video node\n"); + return ret; + } + /* convert to pix format */ + mbus.code = sd_fmt.format.code; + mbus_to_pix(&mbus, &format.fmt.pix); + /* copy the result */ + fmt->pixelformat = format.fmt.pix.pixelformat; + + return 0; +} + +/* + * vpfe_s_fmt() - set the format on video device + * @file: file pointer + * @priv: void pointer + * @fmt: pointer to v4l2_format structure + * + * validate and set the format on video device + * + * Return 0 on success, error code otherwise + */ +static int vpfe_s_fmt(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct v4l2_format format; + int ret; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt\n"); + /* If streaming is started, return error */ + if (video->started) { + v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n"); + return -EBUSY; + } + /* get adjacent subdev's output pad format */ + ret = __vpfe_video_get_format(video, &format); + if (ret) + return ret; + *fmt = format; + video->fmt = *fmt; + return 0; +} + +/* + * vpfe_try_fmt() - try the format on video device + * @file: file pointer + * @priv: void pointer + * @fmt: pointer to v4l2_format structure + * + * validate the format, update with correct format + * based on output format set on adjacent subdev + * + * Return 0 on success, error code otherwise + */ +static int vpfe_try_fmt(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct v4l2_format format; + int ret; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt\n"); + /* get adjacent subdev's output pad format */ + ret = __vpfe_video_get_format(video, &format); + if (ret) + return ret; + + *fmt = format; + return 0; +} + +/* + * vpfe_enum_input() - enum inputs supported on media chain + * @file: file pointer + * @priv: void pointer + * @fmt: pointer to v4l2_fmtdesc structure + * + * fills v4l2_input structure with input available on media chain, + * only one input is enumearted as media chain is setup by this time + * + * Return 0 if successful, -EINVAL is media chain is invalid + */ +static int vpfe_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_ext_subdev_info *sdinfo = video->current_ext_subdev; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n"); + /* enumerate from the subdev user has chosen through mc */ + if (inp->index < sdinfo->num_inputs) { + memcpy(inp, &sdinfo->inputs[inp->index], + sizeof(struct v4l2_input)); + return 0; + } + return -EINVAL; +} + +/* + * vpfe_g_input() - get index of the input which is active + * @file: file pointer + * @priv: void pointer + * @index: pointer to unsigned int + * + * set index with input index which is active + */ +static int vpfe_g_input(struct file *file, void *priv, unsigned int *index) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n"); + + *index = video->current_input; + return 0; +} + +/* + * vpfe_s_input() - set input which is pointed by input index + * @file: file pointer + * @priv: void pointer + * @index: pointer to unsigned int + * + * set input on external subdev + * + * Return 0 on success, error code otherwise + */ +static int vpfe_s_input(struct file *file, void *priv, unsigned int index) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_ext_subdev_info *sdinfo; + struct vpfe_route *route; + struct v4l2_input *inps; + u32 output; + u32 input; + int ret; + int i; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n"); + + ret = mutex_lock_interruptible(&video->lock); + if (ret) + return ret; + /* + * If streaming is started return device busy + * error + */ + if (video->started) { + v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n"); + ret = -EBUSY; + goto unlock_out; + } + + sdinfo = video->current_ext_subdev; + if (!sdinfo->registered) { + ret = -EINVAL; + goto unlock_out; + } + if (vpfe_dev->cfg->setup_input && + vpfe_dev->cfg->setup_input(sdinfo->grp_id) < 0) { + ret = -EFAULT; + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, + "couldn't setup input for %s\n", + sdinfo->module_name); + goto unlock_out; + } + route = &sdinfo->routes[index]; + if (route && sdinfo->can_route) { + input = route->input; + output = route->output; + ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, + sdinfo->grp_id, video, + s_routing, input, output, 0); + if (ret) { + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, + "s_input:error in setting input in decoder\n"); + ret = -EINVAL; + goto unlock_out; + } + } + /* set standards set by subdev in video device */ + for (i = 0; i < sdinfo->num_inputs; i++) { + inps = &sdinfo->inputs[i]; + video->video_dev.tvnorms |= inps->std; + } + video->current_input = index; +unlock_out: + mutex_unlock(&video->lock); + return ret; +} + +/* + * vpfe_querystd() - query std which is being input on external subdev + * @file: file pointer + * @priv: void pointer + * @std_id: pointer to v4l2_std_id structure + * + * call external subdev through v4l2_device_call_until_err to + * get the std that is being active. + * + * Return 0 on success, error code otherwise + */ +static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_ext_subdev_info *sdinfo; + int ret; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n"); + + ret = mutex_lock_interruptible(&video->lock); + sdinfo = video->current_ext_subdev; + if (ret) + return ret; + /* Call querystd function of decoder device */ + ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id, + video, querystd, std_id); + mutex_unlock(&video->lock); + return ret; +} + +/* + * vpfe_s_std() - set std on external subdev + * @file: file pointer + * @priv: void pointer + * @std_id: pointer to v4l2_std_id structure + * + * set std pointed by std_id on external subdev by calling it using + * v4l2_device_call_until_err + * + * Return 0 on success, error code otherwise + */ +static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_ext_subdev_info *sdinfo; + int ret; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n"); + + /* Call decoder driver function to set the standard */ + ret = mutex_lock_interruptible(&video->lock); + if (ret) + return ret; + sdinfo = video->current_ext_subdev; + /* If streaming is started, return device busy error */ + if (video->started) { + v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n"); + ret = -EBUSY; + goto unlock_out; + } + ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id, + video, s_std, std_id); + if (ret < 0) { + v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n"); + video->stdid = V4L2_STD_UNKNOWN; + goto unlock_out; + } + video->stdid = std_id; +unlock_out: + mutex_unlock(&video->lock); + return ret; +} + +static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *tvnorm) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n"); + *tvnorm = video->stdid; + return 0; +} + +/* + * vpfe_enum_dv_timings() - enumerate dv_timings which are supported by + * to external subdev + * @file: file pointer + * @priv: void pointer + * @timings: pointer to v4l2_enum_dv_timings structure + * + * enum dv_timings's which are supported by external subdev through + * v4l2_subdev_call + * + * Return 0 on success, error code otherwise + */ +static int +vpfe_enum_dv_timings(struct file *file, void *fh, + struct v4l2_enum_dv_timings *timings) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct v4l2_subdev *subdev = video->current_ext_subdev->subdev; + + timings->pad = 0; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_dv_timings\n"); + return v4l2_subdev_call(subdev, pad, enum_dv_timings, timings); +} + +/* + * vpfe_query_dv_timings() - query the dv_timings which is being input + * to external subdev + * @file: file pointer + * @priv: void pointer + * @timings: pointer to v4l2_dv_timings structure + * + * get dv_timings which is being input on external subdev through + * v4l2_subdev_call + * + * Return 0 on success, error code otherwise + */ +static int +vpfe_query_dv_timings(struct file *file, void *fh, + struct v4l2_dv_timings *timings) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct v4l2_subdev *subdev = video->current_ext_subdev->subdev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_query_dv_timings\n"); + return v4l2_subdev_call(subdev, video, query_dv_timings, timings); +} + +/* + * vpfe_s_dv_timings() - set dv_timings on external subdev + * @file: file pointer + * @priv: void pointer + * @timings: pointer to v4l2_dv_timings structure + * + * set dv_timings pointed by timings on external subdev through + * v4l2_device_call_until_err, this configures amplifier also + * + * Return 0 on success, error code otherwise + */ +static int +vpfe_s_dv_timings(struct file *file, void *fh, + struct v4l2_dv_timings *timings) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_dv_timings\n"); + + video->stdid = V4L2_STD_UNKNOWN; + return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, + video->current_ext_subdev->grp_id, + video, s_dv_timings, timings); +} + +/* + * vpfe_g_dv_timings() - get dv_timings which is set on external subdev + * @file: file pointer + * @priv: void pointer + * @timings: pointer to v4l2_dv_timings structure + * + * get dv_timings which is set on external subdev through + * v4l2_subdev_call + * + * Return 0 on success, error code otherwise + */ +static int +vpfe_g_dv_timings(struct file *file, void *fh, + struct v4l2_dv_timings *timings) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct v4l2_subdev *subdev = video->current_ext_subdev->subdev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_dv_timings\n"); + return v4l2_subdev_call(subdev, video, g_dv_timings, timings); +} + +/* + * Videobuf operations + */ +/* + * vpfe_buffer_queue_setup : Callback function for buffer setup. + * @vq: vb2_queue ptr + * @fmt: v4l2 format + * @nbuffers: ptr to number of buffers requested by application + * @nplanes:: contains number of distinct video planes needed to hold a frame + * @sizes[]: contains the size (in bytes) of each plane. + * @alloc_ctxs: ptr to allocation context + * + * This callback function is called when reqbuf() is called to adjust + * the buffer nbuffers and buffer size + */ +static int +vpfe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct vpfe_fh *fh = vb2_get_drv_priv(vq); + struct vpfe_video_device *video = fh->video; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_pipeline *pipe = &video->pipe; + unsigned long size; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue_setup\n"); + size = video->fmt.fmt.pix.sizeimage; + + if (vpfe_dev->video_limit) { + while (size * *nbuffers > vpfe_dev->video_limit) + (*nbuffers)--; + } + if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) { + if (*nbuffers < MIN_NUM_BUFFERS) + *nbuffers = MIN_NUM_BUFFERS; + } + *nplanes = 1; + sizes[0] = size; + alloc_ctxs[0] = video->alloc_ctx; + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, + "nbuffers=%d, size=%lu\n", *nbuffers, size); + return 0; +} + +/* + * vpfe_buffer_prepare : callback function for buffer prepare + * @vb: ptr to vb2_buffer + * + * This is the callback function for buffer prepare when vb2_qbuf() + * function is called. The buffer is prepared and user space virtual address + * or user address is converted into physical address + */ +static int vpfe_buffer_prepare(struct vb2_buffer *vb) +{ + struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue); + struct vpfe_video_device *video = fh->video; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + unsigned long addr; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n"); + + if (vb->state != VB2_BUF_STATE_ACTIVE && + vb->state != VB2_BUF_STATE_PREPARED) + return 0; + + /* Initialize buffer */ + vb2_set_plane_payload(vb, 0, video->fmt.fmt.pix.sizeimage); + if (vb2_plane_vaddr(vb, 0) && + vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) + return -EINVAL; + + addr = vb2_dma_contig_plane_dma_addr(vb, 0); + /* Make sure user addresses are aligned to 32 bytes */ + if (!ALIGN(addr, 32)) + return -EINVAL; + + return 0; +} + +static void vpfe_buffer_queue(struct vb2_buffer *vb) +{ + /* Get the file handle object and device object */ + struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue); + struct vpfe_video_device *video = fh->video; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_pipeline *pipe = &video->pipe; + struct vpfe_cap_buffer *buf = container_of(vb, + struct vpfe_cap_buffer, vb); + unsigned long flags; + unsigned long empty; + unsigned long addr; + + spin_lock_irqsave(&video->dma_queue_lock, flags); + empty = list_empty(&video->dma_queue); + /* add the buffer to the DMA queue */ + list_add_tail(&buf->list, &video->dma_queue); + spin_unlock_irqrestore(&video->dma_queue_lock, flags); + /* this case happens in case of single shot */ + if (empty && video->started && pipe->state == + VPFE_PIPELINE_STREAM_SINGLESHOT && + video->state == VPFE_VIDEO_BUFFER_NOT_QUEUED) { + spin_lock(&video->dma_queue_lock); + addr = vpfe_video_get_next_buffer(video); + video->ops->queue(vpfe_dev, addr); + + video->state = VPFE_VIDEO_BUFFER_QUEUED; + spin_unlock(&video->dma_queue_lock); + + /* enable h/w each time in single shot */ + if (vpfe_video_is_pipe_ready(pipe)) + vpfe_pipeline_set_stream(pipe, + VPFE_PIPELINE_STREAM_SINGLESHOT); + } +} + +/* vpfe_start_capture() - start streaming on all the subdevs */ +static int vpfe_start_capture(struct vpfe_video_device *video) +{ + struct vpfe_pipeline *pipe = &video->pipe; + int ret = 0; + + video->started = 1; + if (vpfe_video_is_pipe_ready(pipe)) + ret = vpfe_pipeline_set_stream(pipe, pipe->state); + + return ret; +} + +static int vpfe_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct vpfe_fh *fh = vb2_get_drv_priv(vq); + struct vpfe_video_device *video = fh->video; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + unsigned long addr; + int ret; + + ret = mutex_lock_interruptible(&video->lock); + if (ret) + goto streamoff; + + /* Get the next frame from the buffer queue */ + video->cur_frm = video->next_frm = + list_entry(video->dma_queue.next, struct vpfe_cap_buffer, list); + /* Remove buffer from the buffer queue */ + list_del(&video->cur_frm->list); + /* Mark state of the current frame to active */ + video->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE; + /* Initialize field_id and started member */ + video->field_id = 0; + addr = vb2_dma_contig_plane_dma_addr(&video->cur_frm->vb, 0); + video->ops->queue(vpfe_dev, addr); + video->state = VPFE_VIDEO_BUFFER_QUEUED; + + ret = vpfe_start_capture(video); + if (ret) { + struct vpfe_cap_buffer *buf, *tmp; + + vb2_buffer_done(&video->cur_frm->vb, VB2_BUF_STATE_QUEUED); + list_for_each_entry_safe(buf, tmp, &video->dma_queue, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED); + } + goto unlock_out; + } + + mutex_unlock(&video->lock); + + return ret; +unlock_out: + mutex_unlock(&video->lock); +streamoff: + ret = vb2_streamoff(&video->buffer_queue, video->buffer_queue.type); + return 0; +} + +static int vpfe_buffer_init(struct vb2_buffer *vb) +{ + struct vpfe_cap_buffer *buf = container_of(vb, + struct vpfe_cap_buffer, vb); + + INIT_LIST_HEAD(&buf->list); + return 0; +} + +/* abort streaming and wait for last buffer */ +static void vpfe_stop_streaming(struct vb2_queue *vq) +{ + struct vpfe_fh *fh = vb2_get_drv_priv(vq); + struct vpfe_video_device *video = fh->video; + + /* release all active buffers */ + if (video->cur_frm == video->next_frm) { + vb2_buffer_done(&video->cur_frm->vb, VB2_BUF_STATE_ERROR); + } else { + if (video->cur_frm != NULL) + vb2_buffer_done(&video->cur_frm->vb, + VB2_BUF_STATE_ERROR); + if (video->next_frm != NULL) + vb2_buffer_done(&video->next_frm->vb, + VB2_BUF_STATE_ERROR); + } + + while (!list_empty(&video->dma_queue)) { + video->next_frm = list_entry(video->dma_queue.next, + struct vpfe_cap_buffer, list); + list_del(&video->next_frm->list); + vb2_buffer_done(&video->next_frm->vb, VB2_BUF_STATE_ERROR); + } +} + +static void vpfe_buf_cleanup(struct vb2_buffer *vb) +{ + struct vpfe_fh *fh = vb2_get_drv_priv(vb->vb2_queue); + struct vpfe_video_device *video = fh->video; + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_cap_buffer *buf = container_of(vb, + struct vpfe_cap_buffer, vb); + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buf_cleanup\n"); + if (vb->state == VB2_BUF_STATE_ACTIVE) + list_del_init(&buf->list); +} + +static struct vb2_ops video_qops = { + .queue_setup = vpfe_buffer_queue_setup, + .buf_init = vpfe_buffer_init, + .buf_prepare = vpfe_buffer_prepare, + .start_streaming = vpfe_start_streaming, + .stop_streaming = vpfe_stop_streaming, + .buf_cleanup = vpfe_buf_cleanup, + .buf_queue = vpfe_buffer_queue, +}; + +/* + * vpfe_reqbufs() - supported REQBUF only once opening + * the device. + */ +static int vpfe_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *req_buf) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_fh *fh = file->private_data; + struct vb2_queue *q; + int ret; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n"); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type && + V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n"); + return -EINVAL; + } + + ret = mutex_lock_interruptible(&video->lock); + if (ret) + return ret; + + if (video->io_usrs != 0) { + v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n"); + ret = -EBUSY; + goto unlock_out; + } + video->memory = req_buf->memory; + + /* Initialize videobuf2 queue as per the buffer type */ + video->alloc_ctx = vb2_dma_contig_init_ctx(vpfe_dev->pdev); + if (IS_ERR(video->alloc_ctx)) { + v4l2_err(&vpfe_dev->v4l2_dev, "Failed to get the context\n"); + return PTR_ERR(video->alloc_ctx); + } + + q = &video->buffer_queue; + q->type = req_buf->type; + q->io_modes = VB2_MMAP | VB2_USERPTR; + q->drv_priv = fh; + q->min_buffers_needed = 1; + q->ops = &video_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = sizeof(struct vpfe_cap_buffer); + + ret = vb2_queue_init(q); + if (ret) { + v4l2_err(&vpfe_dev->v4l2_dev, "vb2_queue_init() failed\n"); + vb2_dma_contig_cleanup_ctx(vpfe_dev->pdev); + return ret; + } + + fh->io_allowed = 1; + video->io_usrs = 1; + INIT_LIST_HEAD(&video->dma_queue); + ret = vb2_reqbufs(&video->buffer_queue, req_buf); + +unlock_out: + mutex_unlock(&video->lock); + return ret; +} + +/* + * vpfe_querybuf() - query buffers for exchange + */ +static int vpfe_querybuf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n"); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type && + V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n"); + return -EINVAL; + } + + if (video->memory != V4L2_MEMORY_MMAP) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n"); + return -EINVAL; + } + + /* Call vb2_querybuf to get information */ + return vb2_querybuf(&video->buffer_queue, buf); +} + +/* + * vpfe_qbuf() - queue buffers for capture or processing + */ +static int vpfe_qbuf(struct file *file, void *priv, + struct v4l2_buffer *p) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_fh *fh = file->private_data; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n"); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type && + V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n"); + return -EINVAL; + } + /* + * If this file handle is not allowed to do IO, + * return error + */ + if (!fh->io_allowed) { + v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n"); + return -EACCES; + } + + return vb2_qbuf(&video->buffer_queue, p); +} + +/* + * vpfe_dqbuf() - deque buffer which is done with processing + */ +static int vpfe_dqbuf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n"); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type && + V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n"); + return -EINVAL; + } + + return vb2_dqbuf(&video->buffer_queue, + buf, (file->f_flags & O_NONBLOCK)); +} + +/* + * vpfe_streamon() - start streaming + * @file: file pointer + * @priv: void pointer + * @buf_type: enum v4l2_buf_type + * + * queue buffer onto hardware for capture/processing and + * start all the subdevs which are in media chain + * + * Return 0 on success, error code otherwise + */ +static int vpfe_streamon(struct file *file, void *priv, + enum v4l2_buf_type buf_type) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_pipeline *pipe = &video->pipe; + struct vpfe_fh *fh = file->private_data; + struct vpfe_ext_subdev_info *sdinfo; + int ret = -EINVAL; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n"); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type && + V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type) { + v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n"); + return ret; + } + /* If file handle is not allowed IO, return error */ + if (!fh->io_allowed) { + v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n"); + return -EACCES; + } + sdinfo = video->current_ext_subdev; + /* If buffer queue is empty, return error */ + if (list_empty(&video->buffer_queue.queued_list)) { + v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n"); + return -EIO; + } + /* Validate the pipeline */ + if (V4L2_BUF_TYPE_VIDEO_CAPTURE == buf_type) { + ret = vpfe_video_validate_pipeline(pipe); + if (ret < 0) + return ret; + } + /* Call vb2_streamon to start streaming */ + return vb2_streamon(&video->buffer_queue, buf_type); +} + +/* + * vpfe_streamoff() - stop streaming + * @file: file pointer + * @priv: void pointer + * @buf_type: enum v4l2_buf_type + * + * stop all the subdevs which are in media chain + * + * Return 0 on success, error code otherwise + */ +static int vpfe_streamoff(struct file *file, void *priv, + enum v4l2_buf_type buf_type) +{ + struct vpfe_video_device *video = video_drvdata(file); + struct vpfe_device *vpfe_dev = video->vpfe_dev; + struct vpfe_fh *fh = file->private_data; + int ret = 0; + + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n"); + + if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE && + buf_type != V4L2_BUF_TYPE_VIDEO_OUTPUT) { + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "Invalid buf type\n"); + return -EINVAL; + } + + /* If io is allowed for this file handle, return error */ + if (!fh->io_allowed) { + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "fh->io_allowed\n"); + return -EACCES; + } + + /* If streaming is not started, return error */ + if (!video->started) { + v4l2_err(&vpfe_dev->v4l2_dev, "device is not started\n"); + return -EINVAL; + } + + ret = mutex_lock_interruptible(&video->lock); + if (ret) + return ret; + + vpfe_stop_capture(video); + ret = vb2_streamoff(&video->buffer_queue, buf_type); + mutex_unlock(&video->lock); + + return ret; +} + +/* vpfe capture ioctl operations */ +static const struct v4l2_ioctl_ops vpfe_ioctl_ops = { + .vidioc_querycap = vpfe_querycap, + .vidioc_g_fmt_vid_cap = vpfe_g_fmt, + .vidioc_s_fmt_vid_cap = vpfe_s_fmt, + .vidioc_try_fmt_vid_cap = vpfe_try_fmt, + .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt, + .vidioc_g_fmt_vid_out = vpfe_g_fmt, + .vidioc_s_fmt_vid_out = vpfe_s_fmt, + .vidioc_try_fmt_vid_out = vpfe_try_fmt, + .vidioc_enum_fmt_vid_out = vpfe_enum_fmt, + .vidioc_enum_input = vpfe_enum_input, + .vidioc_g_input = vpfe_g_input, + .vidioc_s_input = vpfe_s_input, + .vidioc_querystd = vpfe_querystd, + .vidioc_s_std = vpfe_s_std, + .vidioc_g_std = vpfe_g_std, + .vidioc_enum_dv_timings = vpfe_enum_dv_timings, + .vidioc_query_dv_timings = vpfe_query_dv_timings, + .vidioc_s_dv_timings = vpfe_s_dv_timings, + .vidioc_g_dv_timings = vpfe_g_dv_timings, + .vidioc_reqbufs = vpfe_reqbufs, + .vidioc_querybuf = vpfe_querybuf, + .vidioc_qbuf = vpfe_qbuf, + .vidioc_dqbuf = vpfe_dqbuf, + .vidioc_streamon = vpfe_streamon, + .vidioc_streamoff = vpfe_streamoff, +}; + +/* VPFE video init function */ +int vpfe_video_init(struct vpfe_video_device *video, const char *name) +{ + const char *direction; + int ret; + + switch (video->type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + direction = "output"; + video->pad.flags = MEDIA_PAD_FL_SINK; + video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + break; + + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + direction = "input"; + video->pad.flags = MEDIA_PAD_FL_SOURCE; + video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; + break; + + default: + return -EINVAL; + } + /* Initialize field of video device */ + video->video_dev.release = video_device_release; + video->video_dev.fops = &vpfe_fops; + video->video_dev.ioctl_ops = &vpfe_ioctl_ops; + video->video_dev.minor = -1; + video->video_dev.tvnorms = 0; + snprintf(video->video_dev.name, sizeof(video->video_dev.name), + "DAVINCI VIDEO %s %s", name, direction); + + spin_lock_init(&video->irqlock); + spin_lock_init(&video->dma_queue_lock); + mutex_init(&video->lock); + ret = media_entity_init(&video->video_dev.entity, + 1, &video->pad, 0); + if (ret < 0) + return ret; + + video_set_drvdata(&video->video_dev, video); + + return 0; +} + +/* vpfe video device register function */ +int vpfe_video_register(struct vpfe_video_device *video, + struct v4l2_device *vdev) +{ + int ret; + + video->video_dev.v4l2_dev = vdev; + + ret = video_register_device(&video->video_dev, VFL_TYPE_GRABBER, -1); + if (ret < 0) + pr_err("%s: could not register video device (%d)\n", + __func__, ret); + return ret; +} + +/* vpfe video device unregister function */ +void vpfe_video_unregister(struct vpfe_video_device *video) +{ + if (video_is_registered(&video->video_dev)) { + video_unregister_device(&video->video_dev); + media_entity_cleanup(&video->video_dev.entity); + } +} |