From: Manjunath Hadli <manjunath.hadli@xxxxxx>
add a generic video driver functionality to be used by all the vpfe
drivers for davinci SoCs. The functionality includes all the
standard v4l2 interfaces including streaming. The video node
interface can be used both as an input and output node for both
continuous and single shot modes.Also supports dv_presets to include
HD modes, wth support for both user pointer IO and mmap.
Signed-off-by: Manjunath Hadli <manjunath.hadli@xxxxxx>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@xxxxxx>
---
drivers/media/platform/davinci/vpfe_video.c | 1725 +++++++++++++++++++++++++++
drivers/media/platform/davinci/vpfe_video.h | 150 +++
2 files changed, 1875 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/platform/davinci/vpfe_video.c
create mode 100644 drivers/media/platform/davinci/vpfe_video.h
diff --git a/drivers/media/platform/davinci/vpfe_video.c b/drivers/media/platform/davinci/vpfe_video.c
new file mode 100644
index 0000000..2e696a0
--- /dev/null
+++ b/drivers/media/platform/davinci/vpfe_video.c
@@ -0,0 +1,1725 @@
+/*
+ * 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@xxxxxx>
+ * Prabhakar Lad <prabhakar.lad@xxxxxx>
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-mediabus.h>
+#include <media/media-entity.h>
+#include <media/media-device.h>
+#include <media/davinci/vpfe_types.h>
+
+#include <mach/cputype.h>
+
+#include "vpfe_mc_capture.h"
+#include "ccdc_hw_device.h"
+
+/* minimum number of buffers needed in cont-mode */
+#define CONT_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_ccdc.pads[0]);
+ if (remote == NULL) {
+ pr_err("Invalid media connection to 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_ccdc.pads[0]);
+ if (remote == NULL) {
+ pr_err("Invalid media connection to 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 ccdc */
+ if (i == vpfe_cfg->num_subdevs) {
+ pr_err("Invalid media chain connection to 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;
+
+ 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 ouput 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 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 successfull, 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 hadle
+ *
+ * Return 0 if successfull, or the return -ENODEV otherwise.
+ */
+static int vpfe_open(struct file *file)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_fh *fh;
+
+ /* Allocate memory for the file handle object */
+ fh = kzalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
+
+ if (fh == NULL)
+ return -ENOMEM;
+ /* store pointer to fh in private_data member of file */
+ file->private_data = fh;
+ fh->video = video;
+ 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 usrs counter */
+ video->usrs++;
+ /* Set io_allowed member to false */
+ fh->io_allowed = 0;
+ /* Initialize priority of this instance to default priority */
+ fh->prio = V4L2_PRIORITY_UNSET;
+ v4l2_prio_open(&video->prio, &fh->prio);
+ mutex_unlock(&video->lock);
+
+ return 0;
+}
+
+/* get the next buffer available from dma queue */
+unsigned long vpfe_get_next_buffer(struct vpfe_video_device *video)
+{
+ /* mark next buffer as active */
+ video->next_frm = list_entry(video->dma_queue.next,
+ struct videobuf_buffer, queue);
+
+ /* in single shot mode both curr_frm
+ and next_frm point to same buffer */
+ video->cur_frm = video->next_frm;
+ list_del(&video->next_frm->queue);
+ video->next_frm->state = VIDEOBUF_ACTIVE;
+
+ return videobuf_to_dma_contig(video->next_frm);
+}
+
+/* schedule the next buffer which is available on dma queue */
+void vpfe_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 videobuf_buffer, queue);
+
+ if (VPFE_PIPELINE_STREAM_SINGLESHOT == video->pipe.state)
+ video->cur_frm = video->next_frm;
+
+ list_del(&video->next_frm->queue);
+ video->next_frm->state = VIDEOBUF_ACTIVE;
+ addr = videobuf_to_dma_contig(video->next_frm);
+
+ video->ops->queue(vpfe_dev, addr);
+
+ video->state = VPFE_VIDEO_BUFFER_QUEUED;
+}
+
+/* schedule the buffer for capturing bottom field */
+void vpfe_schedule_bottom_field(struct vpfe_video_device *video)
+{
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ unsigned long addr;
+
+ addr = videobuf_to_dma_contig(video->cur_frm);
+ addr += video->field_off;
+
+ video->ops->queue(vpfe_dev, addr);
+}
+
+/* make buffer available for dequeue */
+void vpfe_process_buffer_complete(struct vpfe_video_device *video)
+{
+ struct vpfe_pipeline *pipe = &video->pipe;
+ struct timespec timespec;
+ s64 nsec;
+
+ ktime_get_ts(×pec);
+ nsec = timespec_to_ns(×pec);
+
+ video->cur_frm->ts = ns_to_timeval(nsec);
+ video->cur_frm->state = VIDEOBUF_DONE;
+ video->cur_frm->size = video->fmt.fmt.pix.sizeimage;
+ wake_up_interruptible(&video->cur_frm->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 vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_fh *fh = file->private_data;
+
+ 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;
+ videobuf_streamoff(&video->buffer_queue);
+ }
+ video->io_usrs = 0;
+ }
+
+ /* Decrement device usrs 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 */
+ 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 videobuf_mmap_mapper(&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 videobuf_poll_stream(file,
+ &video->buffer_queue, 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->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
+ *
+ * Return 0
+ */
+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 ccdc_hw_device *ccdc_dev = vpfe_dev->vpfe_ccdc.ccdc_dev;
+ struct imp_hw_interface *imp_hw_if = vpfe_dev->vpfe_previewer.imp_hw_if;
+ 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;
+ }
+
+ /* set the bus/interface parameter for the sub device in ccdc */
+ ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
+ if (ret)
+ goto unlock_out;
+
+ /* update the if parameters to imp hw interface */
+ if (imp_hw_if && imp_hw_if->set_hw_if_param)
+ ret = imp_hw_if->set_hw_if_param(vpfe_dev->ipipe,
+ &sdinfo->ccdc_if_params);
+ if (ret)
+ goto unlock_out;
+
+ 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");
+ goto unlock_out;
+ }
+
+unlock_out:
+ mutex_unlock(&video->lock);
+ return ret;
+}
+
+/*
+ * vpfe_enum_preset() - enumerate dv_preset which are supported by
+ * to external subdev
+ *
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_dv_enum_preset structure
+ *
+ * enum dv_preset's which are supported by external subdev through
+ * v4l2_subdev_call
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_enum_preset(struct file *file, void *fh,
+ struct v4l2_dv_enum_preset *preset)
+{
+ 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_preset\n");
+
+ return v4l2_subdev_call(subdev, video, enum_dv_presets, preset);
+}
+
+/*
+ * vpfe_query_preset() - query the dv_preset which is being input
+ * to external subdev
+ *
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_preset structure
+ *
+ * get dv_preset which is being input on external subdev through
+ * v4l2_subdev_call
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_query_preset(struct file *file, void *fh,
+ struct v4l2_dv_preset *preset)
+{
+ 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_preset\n");
+
+ return v4l2_subdev_call(subdev, video, query_dv_preset, preset);
+}
+
+/*
+ * vpfe_s_preset() - set dv_preset on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_preset structure
+ *
+ * set dv_preset 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_preset(struct file *file, void *fh,
+ struct v4l2_dv_preset *preset)
+{
+ 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_preset\n");
+
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
+ video->current_ext_subdev->grp_id,
+ video, s_dv_preset, preset);
+}
+
+/*
+ * vpfe_g_preset() - get dv_preset which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_preset 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_preset(struct file *file, void *fh,
+ struct v4l2_dv_preset *preset)
+{
+ 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_preset\n");
+
+ return v4l2_subdev_call(subdev, video, query_dv_preset, preset);
+}
+
+/*
+ * Videobuf operations
+ */
+static int vpfe_videobuf_setup(struct videobuf_queue *vq,
+ unsigned int *count,
+ unsigned int *size)
+{
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_pipeline *pipe = &video->pipe;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
+
+ *size = video->fmt.fmt.pix.sizeimage;
+
+ if (vpfe_dev->video_limit) {
+ while (*size * *count > vpfe_dev->video_limit)
+ (*count)--;
+ }
+
+ if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) {
+ if (*count < CONT_MIN_NUM_BUFFERS)
+ *count = CONT_MIN_NUM_BUFFERS;
+ }
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+ "count=%d, size=%d\n", *count, *size);
+
+ return 0;
+}
+
+static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ unsigned long addr;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_prepare\n");
+
+ if (VIDEOBUF_NEEDS_INIT != vb->state)
+ return 0;
+
+ /* Initialize buffer */
+ vb->width = video->fmt.fmt.pix.width;
+ vb->height = video->fmt.fmt.pix.height;
+ vb->size = video->fmt.fmt.pix.sizeimage;
+ vb->field = field;
+
+ ret = videobuf_iolock(vq, vb, NULL);
+ if (ret < 0)
+ return ret;
+
+ addr = videobuf_to_dma_contig(vb);
+ /* Make sure user addresses are aligned to 32 bytes */
+ if (!ALIGN(addr, 32))
+ return -EINVAL;
+
+ vb->state = VIDEOBUF_PREPARED;
+
+ return 0;
+}
+
+static void vpfe_videobuf_queue(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ /* Get the file handle object and device object */
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_pipeline *pipe = &video->pipe;
+ 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(&vb->queue, &video->dma_queue);
+ spin_unlock_irqrestore(&video->dma_queue_lock, flags);
+
+ /* Change state of the buffer */
+ vb->state = VIDEOBUF_QUEUED;
+
+ /* 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_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 (is_pipe_ready(pipe))
+ vpfe_pipeline_set_stream(pipe,
+ VPFE_PIPELINE_STREAM_SINGLESHOT);
+ }
+}
+
+static void vpfe_videobuf_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
+
+ if (video->memory == V4L2_MEMORY_MMAP)
+ videobuf_dma_contig_free(vq, vb);
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static struct videobuf_queue_ops vpfe_videobuf_qops = {
+ .buf_setup = vpfe_videobuf_setup,
+ .buf_prepare = vpfe_videobuf_prepare,
+ .buf_queue = vpfe_videobuf_queue,
+ .buf_release = vpfe_videobuf_release,
+};
+
+/*
+ * 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;
+ 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;
+ videobuf_queue_dma_contig_init(&video->buffer_queue,
+ &vpfe_videobuf_qops, vpfe_dev->pdev,
+ &video->irqlock, req_buf->type,
+ video->fmt.fmt.pix.field,
+ sizeof(struct videobuf_buffer),
+ fh, NULL);
+
+ fh->io_allowed = 1;
+ video->io_usrs = 1;
+ INIT_LIST_HEAD(&video->dma_queue);
+ ret = videobuf_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 videobuf_querybuf to get information */
+ return videobuf_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 videobuf_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 videobuf_dqbuf(&video->buffer_queue,
+ buf, file->f_flags & O_NONBLOCK);
+}
+
+/* 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 (is_pipe_ready(pipe))
+ ret = vpfe_pipeline_set_stream(pipe, pipe->state);
+
+ return ret;
+}
+
+/*
+ * 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;
+ unsigned long addr;
+ 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.stream)) {
+ 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 videobuf_streamon to start streaming * in videobuf */
+ ret = videobuf_streamon(&video->buffer_queue);
+ if (ret)
+ return ret;
+
+ ret = mutex_lock_interruptible(&video->lock);
+ if (ret)
+ goto streamoff;
+
+ /* Get the next frame from the buffer queue */
+ video->next_frm = list_entry(video->dma_queue.next,
+ struct videobuf_buffer, queue);
+ video->cur_frm = video->next_frm;
+ /* Remove buffer from the buffer queue */
+ list_del(&video->cur_frm->queue);
+ /* Mark state of the current frame to active */
+ video->cur_frm->state = VIDEOBUF_ACTIVE;
+ /* Initialize field_id and started member */
+ video->field_id = 0;
+ addr = videobuf_to_dma_contig(video->cur_frm);
+ 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 = videobuf_streamoff(&video->buffer_queue);
+ return ret;
+}
+
+/*
+ * 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 = videobuf_streamoff(&video->buffer_queue);
+ mutex_unlock(&video->lock);
+
+ return ret;
+}
+
+/*
+ * vpfe_queryctrl() - query for v4l2 controls which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @ctrl: pointer to v4l2_control structure
+ *
+ * get the v4l2 controls active on external subdev through
+ * v4l2_device_call_until_err
+ *
+ * Return return value returned by v4l2_device_call_until_err
+ */
+static int vpfe_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sub_dev = video->current_ext_subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_queryctrl\n");
+
+ /* pass it to sub device */
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sub_dev->grp_id,
+ core, queryctrl, qc);
+}
+
+/*
+ * vpfe_g_ctrl() - get the v4l2 controls which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @ctrl: pointer to v4l2_control structure
+ *
+ * get the v4l2 controls set on external subdev through
+ * v4l2_device_call_until_err
+ *
+ * Return return value returned by v4l2_device_call_until_err
+ */
+static int vpfe_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sub_dev = video->current_ext_subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_ctrl\n");
+
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sub_dev->grp_id,
+ core, g_ctrl, ctrl);
+}
+
+/*
+ * vpfe_s_ctrl() - set the v4l2 controls on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @ctrl: pointer to v4l2_control structure
+ *
+ * call external subdev through v4l2_device_call_until_err to
+ * set v4l2 controls
+ *
+ * Return return value returned by v4l2_device_call_until_err
+ */
+static int vpfe_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sub_dev = video->current_ext_subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_ctrl\n");
+
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sub_dev->grp_id,
+ core, s_ctrl, ctrl);
+}
+
+/* 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_enum_dv_presets = vpfe_enum_preset,
+ .vidioc_query_dv_preset = vpfe_query_preset,
+ .vidioc_s_dv_preset = vpfe_s_preset,
+ .vidioc_g_dv_preset = vpfe_g_preset,
+ .vidioc_reqbufs = vpfe_reqbufs,
+ .vidioc_querybuf = vpfe_querybuf,
+ .vidioc_qbuf = vpfe_qbuf,
+ .vidioc_dqbuf = vpfe_dqbuf,
+ .vidioc_streamon = vpfe_streamon,
+ .vidioc_streamoff = vpfe_streamoff,
+ .vidioc_queryctrl = vpfe_queryctrl,
+ .vidioc_g_ctrl = vpfe_g_ctrl,
+ .vidioc_s_ctrl = vpfe_s_ctrl,
+};
+
+/* 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;
+ video->video_dev.current_norm = V4L2_STD_NTSC;
+
+ 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);
+ }
+}
diff --git a/drivers/media/platform/davinci/vpfe_video.h b/drivers/media/platform/davinci/vpfe_video.h
new file mode 100644
index 0000000..af68caf
--- /dev/null
+++ b/drivers/media/platform/davinci/vpfe_video.h
@@ -0,0 +1,150 @@
+/*
+ * 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@xxxxxx>
+ * Prabhakar Lad <prabhakar.lad@xxxxxx>
+ */
+
+/* All video device related structures will go here */
+#ifndef _VPFE_VIDEO_H
+#define _VPFE_VIDEO_H
+
+#include <media/media-entity.h>
+#include <media/videobuf-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 {
+ void(*queue)(struct vpfe_device *vpfe_dev, unsigned long addr);
+};
+
+enum vpfe_pipeline_stream_state {
+ VPFE_PIPELINE_STREAM_STOPPED,
+ VPFE_PIPELINE_STREAM_CONTINUOUS,
+ VPFE_PIPELINE_STREAM_SINGLESHOT
+};
+
+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, continous,
+ 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_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;
+ /* pipiline 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 v4l2_buffer */
+ struct videobuf_buffer *cur_frm;
+ /* Pointer pointing to next v4l2_buffer */
+ struct videobuf_buffer *next_frm;
+ /* Used to store pixel format */
+ struct v4l2_format fmt;
+ /* Buffer queue used in video-buf */
+ struct videobuf_queue buffer_queue;
+ /* Queue of filled frames */
+ struct list_head dma_queue;
+ /* Used in video-buf */
+ 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;
+ /*
+ * offset where second field starts from the starting of the
+ * buffer for field seperated YCbCr formats
+ */
+ u32 field_off;
+};
+
+int 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_process_buffer_complete(struct vpfe_video_device *video);
+void vpfe_schedule_bottom_field(struct vpfe_video_device *video);
+void vpfe_schedule_next_buffer(struct vpfe_video_device *video);
+unsigned long vpfe_get_next_buffer(struct vpfe_video_device *video);
+#endif
--
1.7.4.1
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