drivers/media/platform/vivid/vivid-vbi-out.c

   1 /*
   2  * vivid-vbi-out.c - vbi output support functions.
   3  *
   4  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   5  *
   6  * This program is free software; you may redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  11  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  12  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  13  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  14  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  15  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  16  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  17  * SOFTWARE.
  18  */
  19
  20 #include <linux/errno.h>
  21 #include <linux/kernel.h>
  22 #include <linux/videodev2.h>
  23 #include <media/v4l2-common.h>
  24
  25 #include "vivid-core.h"
  26 #include "vivid-kthread-out.h"
  27 #include "vivid-vbi-out.h"
  28 #include "vivid-vbi-cap.h"
  29
  30 static int vbi_out_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
  31                        unsigned *nbuffers, unsigned *nplanes,
  32                        unsigned sizes[], void *alloc_ctxs[])
  33 {
  34         struct vivid_dev *dev = vb2_get_drv_priv(vq);
  35         bool is_60hz = dev->std_out & V4L2_STD_525_60;
  36         unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
  37                 36 * sizeof(struct v4l2_sliced_vbi_data) :
  38                 1440 * 2 * (is_60hz ? 12 : 18);
  39
  40         if (!vivid_is_svid_out(dev))
  41                 return -EINVAL;
  42
  43         sizes[0] = size;
  44
  45         if (vq->num_buffers + *nbuffers < 2)
  46                 *nbuffers = 2 - vq->num_buffers;
  47
  48         *nplanes = 1;
  49         return 0;
  50 }
  51
  52 static int vbi_out_buf_prepare(struct vb2_buffer *vb)
  53 {
  54         struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
  55         bool is_60hz = dev->std_out & V4L2_STD_525_60;
  56         unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
  57                 36 * sizeof(struct v4l2_sliced_vbi_data) :
  58                 1440 * 2 * (is_60hz ? 12 : 18);
  59
  60         dprintk(dev, 1, "%s\n", __func__);
  61
  62         if (dev->buf_prepare_error) {
  63                 /*
  64                  * Error injection: test what happens if buf_prepare() returns
  65                  * an error.
  66                  */
  67                 dev->buf_prepare_error = false;
  68                 return -EINVAL;
  69         }
  70         if (vb2_plane_size(vb, 0) < size) {
  71                 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
  72                                 __func__, vb2_plane_size(vb, 0), size);
  73                 return -EINVAL;
  74         }
  75         vb2_set_plane_payload(vb, 0, size);
  76
  77         return 0;
  78 }
  79
  80 static void vbi_out_buf_queue(struct vb2_buffer *vb)
  81 {
  82         struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
  83         struct vivid_buffer *buf = container_of(vb, struct vivid_buffer, vb);
  84
  85         dprintk(dev, 1, "%s\n", __func__);
  86
  87         spin_lock(&dev->slock);
  88         list_add_tail(&buf->list, &dev->vbi_out_active);
  89         spin_unlock(&dev->slock);
  90 }
  91
  92 static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
  93 {
  94         struct vivid_dev *dev = vb2_get_drv_priv(vq);
  95         int err;
  96
  97         dprintk(dev, 1, "%s\n", __func__);
  98         dev->vbi_out_seq_count = 0;
  99         if (dev->start_streaming_error) {
 100                 dev->start_streaming_error = false;
 101                 err = -EINVAL;
 102         } else {
 103                 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
 104         }
 105         if (err) {
 106                 struct vivid_buffer *buf, *tmp;
 107
 108                 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
 109                         list_del(&buf->list);
 110                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
 111                 }
 112         }
 113         return err;
 114 }
 115
 116 /* abort streaming and wait for last buffer */
 117 static void vbi_out_stop_streaming(struct vb2_queue *vq)
 118 {
 119         struct vivid_dev *dev = vb2_get_drv_priv(vq);
 120
 121         dprintk(dev, 1, "%s\n", __func__);
 122         vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
 123         dev->vbi_out_have_wss = false;
 124         dev->vbi_out_have_cc[0] = false;
 125         dev->vbi_out_have_cc[1] = false;
 126 }
 127
 128 const struct vb2_ops vivid_vbi_out_qops = {
 129         .queue_setup            = vbi_out_queue_setup,
 130         .buf_prepare            = vbi_out_buf_prepare,
 131         .buf_queue              = vbi_out_buf_queue,
 132         .start_streaming        = vbi_out_start_streaming,
 133         .stop_streaming         = vbi_out_stop_streaming,
 134         .wait_prepare           = vivid_unlock,
 135         .wait_finish            = vivid_lock,
 136 };
 137
 138 int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
 139                                         struct v4l2_format *f)
 140 {
 141         struct vivid_dev *dev = video_drvdata(file);
 142         struct v4l2_vbi_format *vbi = &f->fmt.vbi;
 143         bool is_60hz = dev->std_out & V4L2_STD_525_60;
 144
 145         if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
 146                 return -EINVAL;
 147
 148         vbi->sampling_rate = 25000000;
 149         vbi->offset = 24;
 150         vbi->samples_per_line = 1440;
 151         vbi->sample_format = V4L2_PIX_FMT_GREY;
 152         vbi->start[0] = is_60hz ? 10 : 6;
 153         vbi->start[1] = is_60hz ? 273 : 318;
 154         vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
 155         vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
 156         vbi->reserved[0] = 0;
 157         vbi->reserved[1] = 0;
 158         return 0;
 159 }
 160
 161 int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
 162                                         struct v4l2_format *f)
 163 {
 164         struct vivid_dev *dev = video_drvdata(file);
 165         int ret = vidioc_g_fmt_vbi_out(file, priv, f);
 166
 167         if (ret)
 168                 return ret;
 169         if (vb2_is_busy(&dev->vb_vbi_out_q))
 170                 return -EBUSY;
 171         dev->stream_sliced_vbi_out = false;
 172         dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
 173         return 0;
 174 }
 175
 176 int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 177 {
 178         struct vivid_dev *dev = video_drvdata(file);
 179         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 180
 181         if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 182                 return -EINVAL;
 183
 184         vivid_fill_service_lines(vbi, dev->service_set_out);
 185         return 0;
 186 }
 187
 188 int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 189 {
 190         struct vivid_dev *dev = video_drvdata(file);
 191         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 192         bool is_60hz = dev->std_out & V4L2_STD_525_60;
 193         u32 service_set = vbi->service_set;
 194
 195         if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 196                 return -EINVAL;
 197
 198         service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 : V4L2_SLICED_WSS_625;
 199         vivid_fill_service_lines(vbi, service_set);
 200         return 0;
 201 }
 202
 203 int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 204 {
 205         struct vivid_dev *dev = video_drvdata(file);
 206         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 207         int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
 208
 209         if (ret)
 210                 return ret;
 211         if (vb2_is_busy(&dev->vb_vbi_out_q))
 212                 return -EBUSY;
 213         dev->service_set_out = vbi->service_set;
 214         dev->stream_sliced_vbi_out = true;
 215         dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
 216         return 0;
 217 }
 218
 219 void vivid_sliced_vbi_out_process(struct vivid_dev *dev, struct vivid_buffer *buf)
 220 {
 221         struct v4l2_sliced_vbi_data *vbi = vb2_plane_vaddr(&buf->vb, 0);
 222         unsigned elems = vb2_get_plane_payload(&buf->vb, 0) / sizeof(*vbi);
 223
 224         dev->vbi_out_have_cc[0] = false;
 225         dev->vbi_out_have_cc[1] = false;
 226         dev->vbi_out_have_wss = false;
 227         while (elems--) {
 228                 switch (vbi->id) {
 229                 case V4L2_SLICED_CAPTION_525:
 230                         if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
 231                                 dev->vbi_out_have_cc[!!vbi->field] = true;
 232                                 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
 233                                 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
 234                         }
 235                         break;
 236                 case V4L2_SLICED_WSS_625:
 237                         if ((dev->std_out & V4L2_STD_625_50) &&
 238                             vbi->field == 0 && vbi->line == 23) {
 239                                 dev->vbi_out_have_wss = true;
 240                                 dev->vbi_out_wss[0] = vbi->data[0];
 241                                 dev->vbi_out_wss[1] = vbi->data[1];
 242                         }
 243                         break;
 244                 }
 245                 vbi++;
 246         }
 247 }