diff options
Diffstat (limited to 'drivers/media/video/s5p-tv/mixer_video.c')
| -rw-r--r-- | drivers/media/video/s5p-tv/mixer_video.c | 1006 |
1 files changed, 1006 insertions, 0 deletions
diff --git a/drivers/media/video/s5p-tv/mixer_video.c b/drivers/media/video/s5p-tv/mixer_video.c new file mode 100644 index 000000000000..43ac22f35bc7 --- /dev/null +++ b/drivers/media/video/s5p-tv/mixer_video.c @@ -0,0 +1,1006 @@ +/* + * 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 + */ + +#include "mixer.h" + +#include <media/v4l2-ioctl.h> +#include <linux/videodev2.h> +#include <linux/mm.h> +#include <linux/version.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: + put_driver(drv); + return sd; +} + +int __devinit 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_OR_NULL(mdev->alloc_ctx)) { + mxr_err(mdev, "could not acquire vb2 allocator\n"); + 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 __devexit 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->version = KERNEL_VERSION(0, 1, 0); + cap->capabilities = V4L2_CAP_STREAMING | + V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE; + + return 0; +} + +/* Geometry handling */ +static void mxr_layer_geo_fix(struct mxr_layer *layer) +{ + struct mxr_device *mdev = layer->mdev; + struct v4l2_mbus_framefmt mbus_fmt; + + /* TODO: add some dirty flag to avoid unnecessary adjustments */ + 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.field = mbus_fmt.field; + layer->ops.fix_geometry(layer); +} + +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; + + layer->ops.fix_geometry(layer); +} + +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 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 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; + geo->src.full_width = pix->width; + geo->src.width = pix->width; + geo->src.full_height = pix->height; + geo->src.height = pix->height; + /* assure consistency of geometry */ + mxr_layer_geo_fix(layer); + mxr_dbg(mdev, "width=%u height=%u span=%u\n", + geo->src.width, geo->src.height, geo->src.full_width); + + 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; + + 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; + u16 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 inline struct mxr_crop *choose_crop_by_type(struct mxr_geometry *geo, + enum v4l2_buf_type type) +{ + switch (type) { + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: + return &geo->dst; + case V4L2_BUF_TYPE_VIDEO_OVERLAY: + return &geo->src; + default: + return NULL; + } +} + +static int mxr_g_crop(struct file *file, void *fh, struct v4l2_crop *a) +{ + struct mxr_layer *layer = video_drvdata(file); + struct mxr_crop *crop; + + mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + crop = choose_crop_by_type(&layer->geo, a->type); + if (crop == NULL) + return -EINVAL; + mxr_layer_geo_fix(layer); + a->c.left = crop->x_offset; + a->c.top = crop->y_offset; + a->c.width = crop->width; + a->c.height = crop->height; + return 0; +} + +static int mxr_s_crop(struct file *file, void *fh, struct v4l2_crop *a) +{ + struct mxr_layer *layer = video_drvdata(file); + struct mxr_crop *crop; + + mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + crop = choose_crop_by_type(&layer->geo, a->type); + if (crop == NULL) + return -EINVAL; + crop->x_offset = a->c.left; + crop->y_offset = a->c.top; + crop->width = a->c.width; + crop->height = a->c.height; + mxr_layer_geo_fix(layer); + return 0; +} + +static int mxr_cropcap(struct file *file, void *fh, struct v4l2_cropcap *a) +{ + struct mxr_layer *layer = video_drvdata(file); + struct mxr_crop *crop; + + mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + crop = choose_crop_by_type(&layer->geo, a->type); + if (crop == NULL) + return -EINVAL; + mxr_layer_geo_fix(layer); + a->bounds.left = 0; + a->bounds.top = 0; + a->bounds.width = crop->full_width; + a->bounds.top = crop->full_height; + a->defrect = a->bounds; + /* setting pixel aspect to 1/1 */ + a->pixelaspect.numerator = 1; + a->pixelaspect.denominator = 1; + return 0; +} + +static int mxr_enum_dv_presets(struct file *file, void *fh, + struct v4l2_dv_enum_preset *preset) +{ + 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, enum_dv_presets, preset); + mutex_unlock(&mdev->mutex); + + return ret ? -EINVAL : 0; +} + +static int mxr_s_dv_preset(struct file *file, void *fh, + struct v4l2_dv_preset *preset) +{ + 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); + + /* preset change cannot be done while there is an entity + * dependant on output configuration + */ + if (mdev->n_output > 0) { + mutex_unlock(&mdev->mutex); + return -EBUSY; + } + + ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_preset, preset); + + mutex_unlock(&mdev->mutex); + + /* any failure should return EINVAL according to V4L2 doc */ + return ret ? -EINVAL : 0; +} + +static int mxr_g_dv_preset(struct file *file, void *fh, + struct v4l2_dv_preset *preset) +{ + 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_preset, preset); + 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 + * dependant 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); + + 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_preset) + a->capabilities |= V4L2_OUT_CAP_PRESETS; + 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; + int ret = 0; + + if (i >= mdev->output_cnt || mdev->output[i] == NULL) + return -EINVAL; + + mutex_lock(&mdev->mutex); + if (mdev->n_output > 0) { + ret = -EBUSY; + goto done; + } + mdev->current_output = i; + vfd->tvnorms = 0; + v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output, + &vfd->tvnorms); + mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms); + +done: + mutex_unlock(&mdev->mutex); + return ret; +} + +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_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 = 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, + /* Streaming control */ + .vidioc_streamon = mxr_streamon, + .vidioc_streamoff = mxr_streamoff, + /* Preset functions */ + .vidioc_enum_dv_presets = mxr_enum_dv_presets, + .vidioc_s_dv_preset = mxr_s_dv_preset, + .vidioc_g_dv_preset = mxr_g_dv_preset, + /* 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, + /* Crop ioctls */ + .vidioc_g_crop = mxr_g_crop, + .vidioc_s_crop = mxr_s_crop, + .vidioc_cropcap = mxr_cropcap, +}; + +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__); + /* 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"); + return ret; + } + + /* leaving if layer is already initialized */ + if (!v4l2_fh_is_singular_file(file)) + return 0; + + /* 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); + + return 0; + +fail_power: + mxr_power_put(mdev); + +fail_fh_open: + v4l2_fh_release(file); + + return ret; +} + +static unsigned int +mxr_video_poll(struct file *file, struct poll_table_struct *wait) +{ + struct mxr_layer *layer = video_drvdata(file); + + mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + + return vb2_poll(&layer->vb_queue, file, wait); +} + +static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct mxr_layer *layer = video_drvdata(file); + + mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + + return vb2_mmap(&layer->vb_queue, vma); +} + +static int mxr_video_release(struct file *file) +{ + struct mxr_layer *layer = video_drvdata(file); + + mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + if (v4l2_fh_is_singular_file(file)) { + vb2_queue_release(&layer->vb_queue); + mxr_power_put(layer->mdev); + } + v4l2_fh_release(file); + 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, unsigned int *nbuffers, + unsigned int *nplanes, unsigned long 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] = PAGE_ALIGN(planes[i].sizeimage); + mxr_dbg(mdev, "size[%d] = %08lx\n", i, sizes[i]); + } + + if (*nbuffers == 0) + *nbuffers = 1; + + return 0; +} + +static void buf_queue(struct vb2_buffer *vb) +{ + struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb); + struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue); + struct mxr_device *mdev = layer->mdev; + unsigned long flags; + int must_start = 0; + + spin_lock_irqsave(&layer->enq_slock, flags); + if (layer->state == MXR_LAYER_STREAMING_START) { + layer->state = MXR_LAYER_STREAMING; + must_start = 1; + } + list_add_tail(&buffer->list, &layer->enq_list); + spin_unlock_irqrestore(&layer->enq_slock, flags); + if (must_start) { + layer->ops.stream_set(layer, MXR_ENABLE); + mxr_streamer_get(mdev); + } + + mxr_dbg(mdev, "queuing buffer\n"); +} + +static void wait_lock(struct vb2_queue *vq) +{ + struct mxr_layer *layer = vb2_get_drv_priv(vq); + + mxr_dbg(layer->mdev, "%s\n", __func__); + mutex_lock(&layer->mutex); +} + +static void wait_unlock(struct vb2_queue *vq) +{ + struct mxr_layer *layer = vb2_get_drv_priv(vq); + + mxr_dbg(layer->mdev, "%s\n", __func__); + mutex_unlock(&layer->mutex); +} + +static int start_streaming(struct vb2_queue *vq) +{ + 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); + + /* update layers geometry */ + mxr_layer_geo_fix(layer); + mxr_geometry_dump(mdev, &layer->geo); + + layer->ops.format_set(layer); + /* enabling layer in hardware */ + spin_lock_irqsave(&layer->enq_slock, flags); + layer->state = MXR_LAYER_STREAMING_START; + spin_unlock_irqrestore(&layer->enq_slock, flags); + + 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_STATE_ERROR); + layer->update_buf = NULL; + } + if (layer->shadow_buf) { + vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR); + layer->shadow_buf = NULL; + } + spin_unlock_irqrestore(&layer->enq_slock, flags); +} + +static int 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_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); + return 0; +} + +static struct vb2_ops mxr_video_qops = { + .queue_setup = queue_setup, + .buf_queue = buf_queue, + .wait_prepare = wait_unlock, + .wait_finish = wait_lock, + .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) +{ + printk(KERN_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, + .ioctl_ops = &mxr_ioctl_ops, + }; + strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name)); + /* let framework control PRIORITY */ + set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags); + + 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, + .drv_priv = layer, + .buf_struct_size = sizeof(struct mxr_buffer), + .ops = &mxr_video_qops, + .mem_ops = &vb2_dma_contig_memops, + }; + + 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]; +} + |