- 根目录:
- drivers
- media
- platform
- s5p-tv
- mixer_video.c
/*
* Samsung TV Mixer driver
*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
*
* Tomasz Stanislawski, <t.stanislaws@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation. either version 2 of the License,
* or (at your option) any later version
*/
#define pr_fmt(fmt) "s5p-tv (mixer): " fmt
#include "mixer.h"
#include <media/v4l2-ioctl.h>
#include <linux/videodev2.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/timer.h>
#include <media/videobuf2-dma-contig.h>
static int find_reg_callback(struct device *dev, void *p)
{
struct v4l2_subdev **sd = p;
*sd = dev_get_drvdata(dev);
/* non-zero value stops iteration */
return 1;
}
static struct v4l2_subdev *find_and_register_subdev(
struct mxr_device *mdev, char *module_name)
{
struct device_driver *drv;
struct v4l2_subdev *sd = NULL;
int ret;
/* TODO: add waiting until probe is finished */
drv = driver_find(module_name, &platform_bus_type);
if (!drv) {
mxr_warn(mdev, "module %s is missing\n", module_name);
return NULL;
}
/* driver refcnt is increased, it is safe to iterate over devices */
ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
/* ret == 0 means that find_reg_callback was never executed */
if (sd == NULL) {
mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
goto done;
}
/* v4l2_device_register_subdev detects if sd is NULL */
ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
if (ret) {
mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
sd = NULL;
}
done:
return sd;
}
int mxr_acquire_video(struct mxr_device *mdev,
struct mxr_output_conf *output_conf, int output_count)
{
struct device *dev = mdev->dev;
struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
int i;
int ret = 0;
struct v4l2_subdev *sd;
strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
/* prepare context for V4L2 device */
ret = v4l2_device_register(dev, v4l2_dev);
if (ret) {
mxr_err(mdev, "could not register v4l2 device.\n");
goto fail;
}
mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
if (IS_ERR(mdev->alloc_ctx)) {
mxr_err(mdev, "could not acquire vb2 allocator\n");
ret = PTR_ERR(mdev->alloc_ctx);
goto fail_v4l2_dev;
}
/* registering outputs */
mdev->output_cnt = 0;
for (i = 0; i < output_count; ++i) {
struct mxr_output_conf *conf = &output_conf[i];
struct mxr_output *out;
sd = find_and_register_subdev(mdev, conf->module_name);
/* trying to register next output */
if (sd == NULL)
continue;
out = kzalloc(sizeof(*out), GFP_KERNEL);
if (out == NULL) {
mxr_err(mdev, "no memory for '%s'\n",
conf->output_name);
ret = -ENOMEM;
/* registered subdevs are removed in fail_v4l2_dev */
goto fail_output;
}
strlcpy(out->name, conf->output_name, sizeof(out->name));
out->sd = sd;
out->cookie = conf->cookie;
mdev->output[mdev->output_cnt++] = out;
mxr_info(mdev, "added output '%s' from module '%s'\n",
conf->output_name, conf->module_name);
/* checking if maximal number of outputs is reached */
if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
break;
}
if (mdev->output_cnt == 0) {
mxr_err(mdev, "failed to register any output\n");
ret = -ENODEV;
/* skipping fail_output because there is nothing to free */
goto fail_vb2_allocator;
}
return 0;
fail_output:
/* kfree is NULL-safe */
for (i = 0; i < mdev->output_cnt; ++i)
kfree(mdev->output[i]);
memset(mdev->output, 0, sizeof(mdev->output));
fail_vb2_allocator:
/* freeing allocator context */
vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
fail_v4l2_dev:
/* NOTE: automatically unregister all subdevs */
v4l2_device_unregister(v4l2_dev);
fail:
return ret;
}
void mxr_release_video(struct mxr_device *mdev)
{
int i;
/* kfree is NULL-safe */
for (i = 0; i < mdev->output_cnt; ++i)
kfree(mdev->output[i]);
vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
v4l2_device_unregister(&mdev->v4l2_dev);
}
static int mxr_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof(cap->driver));
strlcpy(cap->card, layer->vfd.name, sizeof(cap->card));
sprintf(cap->bus_info, "%d", layer->idx);
cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
{
mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
geo->src.full_width, geo->src.full_height);
mxr_dbg(mdev, "src.size = (%u, %u)\n",
geo->src.width, geo->src.height);
mxr_dbg(mdev, "src.offset = (%u, %u)\n",
geo->src.x_offset, geo->src.y_offset);
mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
geo->dst.full_width, geo->dst.full_height);
mxr_dbg(mdev, "dst.size = (%u, %u)\n",
geo->dst.width, geo->dst.height);
mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
geo->dst.x_offset, geo->dst.y_offset);
mxr_dbg(mdev, "ratio = (%u, %u)\n",
geo->x_ratio, geo->y_ratio);
}
static void mxr_layer_default_geo(struct mxr_layer *layer)
{
struct mxr_device *mdev = layer->mdev;
struct v4l2_mbus_framefmt mbus_fmt;
memset(&layer->geo, 0, sizeof(layer->geo));
mxr_get_mbus_fmt(mdev, &mbus_fmt);
layer->geo.dst.full_width = mbus_fmt.width;
layer->geo.dst.full_height = mbus_fmt.height;
layer->geo.dst.width = layer->geo.dst.full_width;
layer->geo.dst.height = layer->geo.dst.full_height;
layer->geo.dst.field = mbus_fmt.field;
layer->geo.src.full_width = mbus_fmt.width;
layer->geo.src.full_height = mbus_fmt.height;
layer->geo.src.width = layer->geo.src.full_width;
layer->geo.src.height = layer->geo.src.full_height;
mxr_geometry_dump(mdev, &layer->geo);
layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
mxr_geometry_dump(mdev, &layer->geo);
}
static void mxr_layer_update_output(struct mxr_layer *layer)
{
struct mxr_device *mdev = layer->mdev;
struct v4l2_mbus_framefmt mbus_fmt;
mxr_get_mbus_fmt(mdev, &mbus_fmt);
/* checking if update is needed */
if (layer->geo.dst.full_width == mbus_fmt.width &&
layer->geo.dst.full_height == mbus_fmt.width)
return;
layer->geo.dst.full_width = mbus_fmt.width;
layer->geo.dst.full_height = mbus_fmt.height;
layer->geo.dst.field = mbus_fmt.field;
layer->ops.fix_geometry(layer, MXR_GEOMETRY_SINK, 0);
mxr_geometry_dump(mdev, &layer->geo);
}
static const struct mxr_format *find_format_by_fourcc(
struct mxr_layer *layer, unsigned long fourcc);
static const struct mxr_format *find_format_by_index(
struct mxr_layer *layer, unsigned long index);
static int mxr_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
const struct mxr_format *fmt;
mxr_dbg(mdev, "%s\n", __func__);
fmt = find_format_by_index(layer, f->index);
if (fmt == NULL)
return -EINVAL;
strlcpy(f->description, fmt->name, sizeof(f->description));
f->pixelformat = fmt->fourcc;
return 0;
}
static unsigned int divup(unsigned int divident, unsigned int divisor)
{
return (divident + divisor - 1) / divisor;
}
unsigned long mxr_get_plane_size(const struct mxr_block *blk,
unsigned int width, unsigned int height)
{
unsigned int bl_width = divup(width, blk->width);
unsigned int bl_height = divup(height, blk->height);
return bl_width * bl_height * blk->size;
}
static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
const struct mxr_format *fmt, u32 width, u32 height)
{
int i;
/* checking if nothing to fill */
if (!planes)
return;
memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
for (i = 0; i < fmt->num_planes; ++i) {
struct v4l2_plane_pix_format *plane = planes
+ fmt->plane2subframe[i];
const struct mxr_block *blk = &fmt->plane[i];
u32 bl_width = divup(width, blk->width);
u32 bl_height = divup(height, blk->height);
u32 sizeimage = bl_width * bl_height * blk->size;
u32 bytesperline = bl_width * blk->size / blk->height;
plane->sizeimage += sizeimage;
plane->bytesperline = max(plane->bytesperline, bytesperline);
}
}
static int mxr_g_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct mxr_layer *layer = video_drvdata(file);
struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
pix->width = layer->geo.src.full_width;
pix->height = layer->geo.src.full_height;
pix->field = V4L2_FIELD_NONE;
pix->pixelformat = layer->fmt->fourcc;
pix->colorspace = layer->fmt->colorspace;
mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);
return 0;
}
static int mxr_s_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct mxr_layer *layer = video_drvdata(file);
const struct mxr_format *fmt;
struct v4l2_pix_format_mplane *pix;
struct mxr_device *mdev = layer->mdev;
struct mxr_geometry *geo = &layer->geo;
mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
pix = &f->fmt.pix_mp;
fmt = find_format_by_fourcc(layer, pix->pixelformat);
if (fmt == NULL) {
mxr_warn(mdev, "not recognized fourcc: %08x\n",
pix->pixelformat);
return -EINVAL;
}
layer->fmt = fmt;
/* set source size to highest accepted value */
geo->src.full_width = max(geo->dst.full_width, pix->width);
geo->src.full_height = max(geo->dst.full_height, pix->height);
layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
mxr_geometry_dump(mdev, &layer->geo);
/* set cropping to total visible screen */
geo->src.width = pix->width;
geo->src.height = pix->height;
geo->src.x_offset = 0;
geo->src.y_offset = 0;
/* assure consistency of geometry */
layer->ops.fix_geometry(layer, MXR_GEOMETRY_CROP, MXR_NO_OFFSET);
mxr_geometry_dump(mdev, &layer->geo);
/* set full size to lowest possible value */
geo->src.full_width = 0;
geo->src.full_height = 0;
layer->ops.fix_geometry(layer, MXR_GEOMETRY_SOURCE, 0);
mxr_geometry_dump(mdev, &layer->geo);
/* returning results */
mxr_g_fmt(file, priv, f);
return 0;
}
static int mxr_g_selection(struct file *file, void *fh,
struct v4l2_selection *s)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_geometry *geo = &layer->geo;
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
return -EINVAL;
switch (s->target) {
case V4L2_SEL_TGT_CROP:
s->r.left = geo->src.x_offset;
s->r.top = geo->src.y_offset;
s->r.width = geo->src.width;
s->r.height = geo->src.height;
break;
case V4L2_SEL_TGT_CROP_DEFAULT:
case V4L2_SEL_TGT_CROP_BOUNDS:
s->r.left = 0;
s->r.top = 0;
s->r.width = geo->src.full_width;
s->r.height = geo->src.full_height;
break;
case V4L2_SEL_TGT_COMPOSE:
case V4L2_SEL_TGT_COMPOSE_PADDED:
s->r.left = geo->dst.x_offset;
s->r.top = geo->dst.y_offset;
s->r.width = geo->dst.width;
s->r.height = geo->dst.height;
break;
case V4L2_SEL_TGT_COMPOSE_DEFAULT:
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
s->r.left = 0;
s->r.top = 0;
s->r.width = geo->dst.full_width;
s->r.height = geo->dst.full_height;
break;
default:
return -EINVAL;
}
return 0;
}
/* returns 1 if rectangle 'a' is inside 'b' */
static int mxr_is_rect_inside(struct v4l2_rect *a, struct v4l2_rect *b)
{
if (a->left < b->left)
return 0;
if (a->top < b->top)
return 0;
if (a->left + a->width > b->left + b->width)
return 0;
if (a->top + a->height > b->top + b->height)
return 0;
return 1;
}
static int mxr_s_selection(struct file *file, void *fh,
struct v4l2_selection *s)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_geometry *geo = &layer->geo;
struct mxr_crop *target = NULL;
enum mxr_geometry_stage stage;
struct mxr_geometry tmp;
struct v4l2_rect res;
memset(&res, 0, sizeof(res));
mxr_dbg(layer->mdev, "%s: rect: %dx%d@%d,%d\n", __func__,
s->r.width, s->r.height, s->r.left, s->r.top);
if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
return -EINVAL;
switch (s->target) {
/* ignore read-only targets */
case V4L2_SEL_TGT_CROP_DEFAULT:
case V4L2_SEL_TGT_CROP_BOUNDS:
res.width = geo->src.full_width;
res.height = geo->src.full_height;
break;
/* ignore read-only targets */
case V4L2_SEL_TGT_COMPOSE_DEFAULT:
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
res.width = geo->dst.full_width;
res.height = geo->dst.full_height;
break;
case V4L2_SEL_TGT_CROP:
target = &geo->src;
stage = MXR_GEOMETRY_CROP;
break;
case V4L2_SEL_TGT_COMPOSE:
case V4L2_SEL_TGT_COMPOSE_PADDED:
target = &geo->dst;
stage = MXR_GEOMETRY_COMPOSE;
break;
default:
return -EINVAL;
}
/* apply change and update geometry if needed */
if (target) {
/* backup current geometry if setup fails */
memcpy(&tmp, geo, sizeof(tmp));
/* apply requested selection */
target->x_offset = s->r.left;
target->y_offset = s->r.top;
target->width = s->r.width;
target->height = s->r.height;
layer->ops.fix_geometry(layer, stage, s->flags);
/* retrieve update selection rectangle */
res.left = target->x_offset;
res.top = target->y_offset;
res.width = target->width;
res.height = target->height;
mxr_geometry_dump(layer->mdev, &layer->geo);
}
/* checking if the rectangle satisfies constraints */
if ((s->flags & V4L2_SEL_FLAG_LE) && !mxr_is_rect_inside(&res, &s->r))
goto fail;
if ((s->flags & V4L2_SEL_FLAG_GE) && !mxr_is_rect_inside(&s->r, &res))
goto fail;
/* return result rectangle */
s->r = res;
return 0;
fail:
/* restore old geometry, which is not touched if target is NULL */
if (target)
memcpy(geo, &tmp, sizeof(tmp));
return -ERANGE;
}
static int mxr_enum_dv_timings(struct file *file, void *fh,
struct v4l2_enum_dv_timings *timings)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret;
timings->pad = 0;
/* lock protects from changing sd_out */
mutex_lock(&mdev->mutex);
ret = v4l2_subdev_call(to_outsd(mdev), pad, enum_dv_timings, timings);
mutex_unlock(&mdev->mutex);
return ret ? -EINVAL : 0;
}
static int mxr_s_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret;
/* lock protects from changing sd_out */
mutex_lock(&mdev->mutex);
/* timings change cannot be done while there is an entity
* dependent on output configuration
*/
if (mdev->n_output > 0) {
mutex_unlock(&mdev->mutex);
return -EBUSY;
}
ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_timings, timings);
mutex_unlock(&mdev->mutex);
mxr_layer_update_output(layer);
/* any failure should return EINVAL according to V4L2 doc */
return ret ? -EINVAL : 0;
}
static int mxr_g_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret;
/* lock protects from changing sd_out */
mutex_lock(&mdev->mutex);
ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_timings, timings);
mutex_unlock(&mdev->mutex);
return ret ? -EINVAL : 0;
}
static int mxr_dv_timings_cap(struct file *file, void *fh,
struct v4l2_dv_timings_cap *cap)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret;
cap->pad = 0;
/* lock protects from changing sd_out */
mutex_lock(&mdev->mutex);
ret = v4l2_subdev_call(to_outsd(mdev), pad, dv_timings_cap, cap);
mutex_unlock(&mdev->mutex);
return ret ? -EINVAL : 0;
}
static int mxr_s_std(struct file *file, void *fh, v4l2_std_id norm)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret;
/* lock protects from changing sd_out */
mutex_lock(&mdev->mutex);
/* standard change cannot be done while there is an entity
* dependent on output configuration
*/
if (mdev->n_output > 0) {
mutex_unlock(&mdev->mutex);
return -EBUSY;
}
ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, norm);
mutex_unlock(&mdev->mutex);
mxr_layer_update_output(layer);
return ret ? -EINVAL : 0;
}
static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret;
/* lock protects from changing sd_out */
mutex_lock(&mdev->mutex);
ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
mutex_unlock(&mdev->mutex);
return ret ? -EINVAL : 0;
}
static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
struct mxr_output *out;
struct v4l2_subdev *sd;
if (a->index >= mdev->output_cnt)
return -EINVAL;
out = mdev->output[a->index];
BUG_ON(out == NULL);
sd = out->sd;
strlcpy(a->name, out->name, sizeof(a->name));
/* try to obtain supported tv norms */
v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
a->capabilities = 0;
if (sd->ops->video && sd->ops->video->s_dv_timings)
a->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
if (sd->ops->video && sd->ops->video->s_std_output)
a->capabilities |= V4L2_OUT_CAP_STD;
a->type = V4L2_OUTPUT_TYPE_ANALOG;
return 0;
}
static int mxr_s_output(struct file *file, void *fh, unsigned int i)
{
struct video_device *vfd = video_devdata(file);
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
if (i >= mdev->output_cnt || mdev->output[i] == NULL)
return -EINVAL;
mutex_lock(&mdev->mutex);
if (mdev->n_output > 0) {
mutex_unlock(&mdev->mutex);
return -EBUSY;
}
mdev->current_output = i;
vfd->tvnorms = 0;
v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
&vfd->tvnorms);
mutex_unlock(&mdev->mutex);
/* update layers geometry */
mxr_layer_update_output(layer);
mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);
return 0;
}
static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
mutex_lock(&mdev->mutex);
*p = mdev->current_output;
mutex_unlock(&mdev->mutex);
return 0;
}
static int mxr_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *p)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
return vb2_reqbufs(&layer->vb_queue, p);
}
static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
return vb2_querybuf(&layer->vb_queue, p);
}
static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
return vb2_qbuf(&layer->vb_queue, p);
}
static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
}
static int mxr_expbuf(struct file *file, void *priv,
struct v4l2_exportbuffer *eb)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
return vb2_expbuf(&layer->vb_queue, eb);
}
static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
return vb2_streamon(&layer->vb_queue, i);
}
static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
return vb2_streamoff(&layer->vb_queue, i);
}
static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
.vidioc_querycap = mxr_querycap,
/* format handling */
.vidioc_enum_fmt_vid_out_mplane = mxr_enum_fmt,
.vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
.vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
/* buffer control */
.vidioc_reqbufs = mxr_reqbufs,
.vidioc_querybuf = mxr_querybuf,
.vidioc_qbuf = mxr_qbuf,
.vidioc_dqbuf = mxr_dqbuf,
.vidioc_expbuf = mxr_expbuf,
/* Streaming control */
.vidioc_streamon = mxr_streamon,
.vidioc_streamoff = mxr_streamoff,
/* DV Timings functions */
.vidioc_enum_dv_timings = mxr_enum_dv_timings,
.vidioc_s_dv_timings = mxr_s_dv_timings,
.vidioc_g_dv_timings = mxr_g_dv_timings,
.vidioc_dv_timings_cap = mxr_dv_timings_cap,
/* analog TV standard functions */
.vidioc_s_std = mxr_s_std,
.vidioc_g_std = mxr_g_std,
/* Output handling */
.vidioc_enum_output = mxr_enum_output,
.vidioc_s_output = mxr_s_output,
.vidioc_g_output = mxr_g_output,
/* selection ioctls */
.vidioc_g_selection = mxr_g_selection,
.vidioc_s_selection = mxr_s_selection,
};
static int mxr_video_open(struct file *file)
{
struct mxr_layer *layer = video_drvdata(file);
struct mxr_device *mdev = layer->mdev;
int ret = 0;
mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
if (mutex_lock_interruptible(&layer->mutex))
return -ERESTARTSYS;
/* assure device probe is finished */
wait_for_device_probe();
/* creating context for file descriptor */
ret = v4l2_fh_open(file);
if (ret) {
mxr_err(mdev, "v4l2_fh_open failed\n");
goto unlock;
}
/* leaving if layer is already initialized */
if (!v4l2_fh_is_singular_file(file))
goto unlock;
/* FIXME: should power be enabled on open? */
ret = mxr_power_get(mdev);
if (ret) {
mxr_err(mdev, "power on failed\n");
goto fail_fh_open;
}
ret = vb2_queue_init(&layer->vb_queue);
if (ret != 0) {
mxr_err(mdev, "failed to initialize vb2 queue\n");
goto fail_power;
}
/* set default format, first on the list */
layer->fmt = layer->fmt_array[0];
/* setup default geometry */
mxr_layer_default_geo(layer);
mutex_unlock(&layer->mutex);
return 0;
fail_power:
mxr_power_put(mdev);
fail_fh_open:
v4l2_fh_release(file);
unlock:
mutex_unlock(&layer->mutex);
return ret;
}
static unsigned int
mxr_video_poll(struct file *file, struct poll_table_struct *wait)
{
struct mxr_layer *layer = video_drvdata(file);
unsigned int res;
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
mutex_lock(&layer->mutex);
res = vb2_poll(&layer->vb_queue, file, wait);
mutex_unlock(&layer->mutex);
return res;
}
static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
{
struct mxr_layer *layer = video_drvdata(file);
int ret;
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
if (mutex_lock_interruptible(&layer->mutex))
return -ERESTARTSYS;
ret = vb2_mmap(&layer->vb_queue, vma);
mutex_unlock(&layer->mutex);
return ret;
}
static int mxr_video_release(struct file *file)
{
struct mxr_layer *layer = video_drvdata(file);
mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
mutex_lock(&layer->mutex);
if (v4l2_fh_is_singular_file(file)) {
vb2_queue_release(&layer->vb_queue);
mxr_power_put(layer->mdev);
}
v4l2_fh_release(file);
mutex_unlock(&layer->mutex);
return 0;
}
static const struct v4l2_file_operations mxr_fops = {
.owner = THIS_MODULE,
.open = mxr_video_open,
.poll = mxr_video_poll,
.mmap = mxr_video_mmap,
.release = mxr_video_release,
.unlocked_ioctl = video_ioctl2,
};
static int queue_setup(struct vb2_queue *vq, const void *parg,
unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[],
void *alloc_ctxs[])
{
struct mxr_layer *layer = vb2_get_drv_priv(vq);
const struct mxr_format *fmt = layer->fmt;
int i;
struct mxr_device *mdev = layer->mdev;
struct v4l2_plane_pix_format planes[3];
mxr_dbg(mdev, "%s\n", __func__);
/* checking if format was configured */
if (fmt == NULL)
return -EINVAL;
mxr_dbg(mdev, "fmt = %s\n", fmt->name);
mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
layer->geo.src.full_height);
*nplanes = fmt->num_subframes;
for (i = 0; i < fmt->num_subframes; ++i) {
alloc_ctxs[i] = layer->mdev->alloc_ctx;
sizes[i] = planes[i].sizeimage;
mxr_dbg(mdev, "size[%d] = %08x\n", i, sizes[i]);
}
if (*nbuffers == 0)
*nbuffers = 1;
return 0;
}
static void buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct mxr_buffer *buffer = container_of(vbuf, struct mxr_buffer, vb);
struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
struct mxr_device *mdev = layer->mdev;
unsigned long flags;
spin_lock_irqsave(&layer->enq_slock, flags);
list_add_tail(&buffer->list, &layer->enq_list);
spin_unlock_irqrestore(&layer->enq_slock, flags);
mxr_dbg(mdev, "queuing buffer\n");
}
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct mxr_layer *layer = vb2_get_drv_priv(vq);
struct mxr_device *mdev = layer->mdev;
unsigned long flags;
mxr_dbg(mdev, "%s\n", __func__);
/* block any changes in output configuration */
mxr_output_get(mdev);
mxr_layer_update_output(layer);
layer->ops.format_set(layer);
/* enabling layer in hardware */
spin_lock_irqsave(&layer->enq_slock, flags);
layer->state = MXR_LAYER_STREAMING;
spin_unlock_irqrestore(&layer->enq_slock, flags);
layer->ops.stream_set(layer, MXR_ENABLE);
mxr_streamer_get(mdev);
return 0;
}
static void mxr_watchdog(unsigned long arg)
{
struct mxr_layer *layer = (struct mxr_layer *) arg;
struct mxr_device *mdev = layer->mdev;
unsigned long flags;
mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);
spin_lock_irqsave(&layer->enq_slock, flags);
if (layer->update_buf == layer->shadow_buf)
layer->update_buf = NULL;
if (layer->update_buf) {
vb2_buffer_done(&layer->update_buf->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
layer->update_buf = NULL;
}
if (layer->shadow_buf) {
vb2_buffer_done(&layer->shadow_buf->vb.vb2_buf,
VB2_BUF_STATE_ERROR);
layer->shadow_buf = NULL;
}
spin_unlock_irqrestore(&layer->enq_slock, flags);
}
static void stop_streaming(struct vb2_queue *vq)
{
struct mxr_layer *layer = vb2_get_drv_priv(vq);
struct mxr_device *mdev = layer->mdev;
unsigned long flags;
struct timer_list watchdog;
struct mxr_buffer *buf, *buf_tmp;
mxr_dbg(mdev, "%s\n", __func__);
spin_lock_irqsave(&layer->enq_slock, flags);
/* reset list */
layer->state = MXR_LAYER_STREAMING_FINISH;
/* set all buffer to be done */
list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&layer->enq_slock, flags);
/* give 1 seconds to complete to complete last buffers */
setup_timer_on_stack(&watchdog, mxr_watchdog,
(unsigned long)layer);
mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));
/* wait until all buffers are goes to done state */
vb2_wait_for_all_buffers(vq);
/* stop timer if all synchronization is done */
del_timer_sync(&watchdog);
destroy_timer_on_stack(&watchdog);
/* stopping hardware */
spin_lock_irqsave(&layer->enq_slock, flags);
layer->state = MXR_LAYER_IDLE;
spin_unlock_irqrestore(&layer->enq_slock, flags);
/* disabling layer in hardware */
layer->ops.stream_set(layer, MXR_DISABLE);
/* remove one streamer */
mxr_streamer_put(mdev);
/* allow changes in output configuration */
mxr_output_put(mdev);
}
static struct vb2_ops mxr_video_qops = {
.queue_setup = queue_setup,
.buf_queue = buf_queue,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
};
/* FIXME: try to put this functions to mxr_base_layer_create */
int mxr_base_layer_register(struct mxr_layer *layer)
{
struct mxr_device *mdev = layer->mdev;
int ret;
ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
if (ret)
mxr_err(mdev, "failed to register video device\n");
else
mxr_info(mdev, "registered layer %s as /dev/video%d\n",
layer->vfd.name, layer->vfd.num);
return ret;
}
void mxr_base_layer_unregister(struct mxr_layer *layer)
{
video_unregister_device(&layer->vfd);
}
void mxr_layer_release(struct mxr_layer *layer)
{
if (layer->ops.release)
layer->ops.release(layer);
}
void mxr_base_layer_release(struct mxr_layer *layer)
{
kfree(layer);
}
static void mxr_vfd_release(struct video_device *vdev)
{
pr_info("video device release\n");
}
struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
int idx, char *name, struct mxr_layer_ops *ops)
{
struct mxr_layer *layer;
layer = kzalloc(sizeof(*layer), GFP_KERNEL);
if (layer == NULL) {
mxr_err(mdev, "not enough memory for layer.\n");
goto fail;
}
layer->mdev = mdev;
layer->idx = idx;
layer->ops = *ops;
spin_lock_init(&layer->enq_slock);
INIT_LIST_HEAD(&layer->enq_list);
mutex_init(&layer->mutex);
layer->vfd = (struct video_device) {
.minor = -1,
.release = mxr_vfd_release,
.fops = &mxr_fops,
.vfl_dir = VFL_DIR_TX,
.ioctl_ops = &mxr_ioctl_ops,
};
strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
video_set_drvdata(&layer->vfd, layer);
layer->vfd.lock = &layer->mutex;
layer->vfd.v4l2_dev = &mdev->v4l2_dev;
layer->vb_queue = (struct vb2_queue) {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF,
.drv_priv = layer,
.buf_struct_size = sizeof(struct mxr_buffer),
.ops = &mxr_video_qops,
.min_buffers_needed = 1,
.mem_ops = &vb2_dma_contig_memops,
.lock = &layer->mutex,
};
return layer;
fail:
return NULL;
}
static const struct mxr_format *find_format_by_fourcc(
struct mxr_layer *layer, unsigned long fourcc)
{
int i;
for (i = 0; i < layer->fmt_array_size; ++i)
if (layer->fmt_array[i]->fourcc == fourcc)
return layer->fmt_array[i];
return NULL;
}
static const struct mxr_format *find_format_by_index(
struct mxr_layer *layer, unsigned long index)
{
if (index >= layer->fmt_array_size)
return NULL;
return layer->fmt_array[index];
}