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+/*
+ * 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_source(&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_source(&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_source(&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_source(&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_source(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 == 0) ? ret : -ETIMEDOUT ;
+}
+
+/*
+ * 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 successfull, 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;
+ v4l2_prio_open(&video->prio, &handle->prio);
+ 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--;
+ /* Close the priority */
+ v4l2_prio_close(&video->prio, fh->prio);
+ /* 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->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ else
+ cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+ cap->device_caps = cap->capabilities;
+ cap->version = VPFE_CAPTURE_VERSION_CODE;
+ 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 successfull, 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_source(&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 successfull, -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 choosen 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,
+ core, 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;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_dv_timings\n");
+ return v4l2_subdev_call(subdev, video, 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_preset on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @timings: pointer to v4l2_dv_timings structure
+ *
+ * set dv_timings pointed by preset 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_preset which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @timings: pointer to v4l2_dv_timings structure
+ *
+ * get dv_preset 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)
+ 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 int vpfe_stop_streaming(struct vb2_queue *vq)
+{
+ struct vpfe_fh *fh = vb2_get_drv_priv(vq);
+ struct vpfe_video_device *video = fh->video;
+
+ if (!vb2_is_streaming(vq))
+ return 0;
+ /* release all active buffers */
+ 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);
+ }
+ return 0;
+}
+
+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->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() - get dv_preset which is set on external subdev
+ * @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() - get dv_preset which is set on external subdev
+ * @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);
+
+ /* Initialize prio member of device object */
+ v4l2_prio_init(&video->prio);
+ 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)) {
+ media_entity_cleanup(&video->video_dev.entity);
+ video_unregister_device(&video->video_dev);
+ }
+}
new file mode 100644
@@ -0,0 +1,155 @@
+/*
+ * 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>
+ */
+
+#ifndef _DAVINCI_VPFE_VIDEO_H
+#define _DAVINCI_VPFE_VIDEO_H
+
+#include <media/videobuf2-dma-contig.h>
+
+struct vpfe_device;
+
+/*
+ * struct vpfe_video_operations - VPFE video operations
+ * @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
+ * if there was no buffer previously queued.
+ */
+struct vpfe_video_operations {
+ int(*queue) (struct vpfe_device *vpfe_dev, unsigned long addr);
+};
+
+enum vpfe_pipeline_stream_state {
+ VPFE_PIPELINE_STREAM_STOPPED = 0,
+ VPFE_PIPELINE_STREAM_CONTINUOUS = 1,
+ VPFE_PIPELINE_STREAM_SINGLESHOT = 2,
+};
+
+enum vpfe_video_state {
+ /* indicates that buffer is not queued */
+ VPFE_VIDEO_BUFFER_NOT_QUEUED = 0,
+ /* indicates that buffer is queued */
+ VPFE_VIDEO_BUFFER_QUEUED = 1,
+};
+
+struct vpfe_pipeline {
+ /* media pipeline */
+ struct media_pipeline *pipe;
+ /* state of the pipeline, continuous,
+ * single-shot or stopped
+ */
+ enum vpfe_pipeline_stream_state state;
+ /* number of active input video entities */
+ unsigned int input_num;
+ /* number of active output video entities */
+ unsigned int output_num;
+ /* input video nodes in case of single-shot mode */
+ struct vpfe_video_device *inputs[10];
+ /* capturing video nodes */
+ struct vpfe_video_device *outputs[10];
+};
+
+#define to_vpfe_pipeline(__e) \
+ container_of((__e)->pipe, struct vpfe_pipeline, pipe)
+
+#define to_vpfe_video(vdev) \
+ container_of(vdev, struct vpfe_video_device, video_dev)
+
+struct vpfe_cap_buffer {
+ struct vb2_buffer vb;
+ struct list_head list;
+};
+
+struct vpfe_video_device {
+ /* vpfe device */
+ struct vpfe_device *vpfe_dev;
+ /* video dev */
+ struct video_device video_dev;
+ /* media pad of video entity */
+ struct media_pad pad;
+ /* video operations supported by video device */
+ const struct vpfe_video_operations *ops;
+ /* type of the video buffers used by user */
+ enum v4l2_buf_type type;
+ /* Indicates id of the field which is being captured */
+ u32 field_id;
+ /* pipeline for which video device is part of */
+ struct vpfe_pipeline pipe;
+ /* Indicates whether streaming started */
+ u8 started;
+ /* Indicates state of the stream */
+ unsigned int state;
+ /* current input at the sub device */
+ int current_input;
+ /*
+ * This field keeps track of type of buffer exchange mechanism
+ * user has selected
+ */
+ enum v4l2_memory memory;
+ /* Used to keep track of state of the priority */
+ struct v4l2_prio_state prio;
+ /* number of open instances of the channel */
+ u32 usrs;
+ /* flag to indicate whether decoder is initialized */
+ u8 initialized;
+ /* skip frame count */
+ u8 skip_frame_count;
+ /* skip frame count init value */
+ u8 skip_frame_count_init;
+ /* time per frame for skipping */
+ struct v4l2_fract timeperframe;
+ /* ptr to currently selected sub device */
+ struct vpfe_ext_subdev_info *current_ext_subdev;
+ /* Pointer pointing to current vpfe_cap_buffer */
+ struct vpfe_cap_buffer *cur_frm;
+ /* Pointer pointing to next vpfe_cap_buffer */
+ struct vpfe_cap_buffer *next_frm;
+ /* Used to store pixel format */
+ struct v4l2_format fmt;
+ struct vb2_queue buffer_queue;
+ /* allocator-specific contexts for each plane */
+ struct vb2_alloc_ctx *alloc_ctx;
+ /* Queue of filled frames */
+ struct list_head dma_queue;
+ spinlock_t irqlock;
+ /* IRQ lock for DMA queue */
+ spinlock_t dma_queue_lock;
+ /* lock used to access this structure */
+ struct mutex lock;
+ /* number of users performing IO */
+ u32 io_usrs;
+ /* Currently selected or default standard */
+ v4l2_std_id stdid;
+ /*
+ * offset where second field starts from the starting of the
+ * buffer for field seperated YCbCr formats
+ */
+ u32 field_off;
+};
+
+int vpfe_video_is_pipe_ready(struct vpfe_pipeline *pipe);
+void vpfe_video_unregister(struct vpfe_video_device *video);
+int vpfe_video_register(struct vpfe_video_device *video,
+ struct v4l2_device *vdev);
+int vpfe_video_init(struct vpfe_video_device *video, const char *name);
+void vpfe_video_process_buffer_complete(struct vpfe_video_device *video);
+void vpfe_video_schedule_bottom_field(struct vpfe_video_device *video);
+void vpfe_video_schedule_next_buffer(struct vpfe_video_device *video);
+
+#endif /* _DAVINCI_VPFE_VIDEO_H */