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 void *parg,
  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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  83         struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
  84         struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
  85
  86         dprintk(dev, 1, "%s\n", __func__);
  87
  88         spin_lock(&dev->slock);
  89         list_add_tail(&buf->list, &dev->vbi_out_active);
  90         spin_unlock(&dev->slock);
  91 }
  92
  93 static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
  94 {
  95         struct vivid_dev *dev = vb2_get_drv_priv(vq);
  96         int err;
  97
  98         dprintk(dev, 1, "%s\n", __func__);
  99         dev->vbi_out_seq_count = 0;
 100         if (dev->start_streaming_error) {
 101                 dev->start_streaming_error = false;
 102                 err = -EINVAL;
 103         } else {
 104                 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
 105         }
 106         if (err) {
 107                 struct vivid_buffer *buf, *tmp;
 108
 109                 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
 110                         list_del(&buf->list);
 111                         vb2_buffer_done(&buf->vb.vb2_buf,
 112                                         VB2_BUF_STATE_QUEUED);
 113                 }
 114         }
 115         return err;
 116 }
 117
 118 /* abort streaming and wait for last buffer */
 119 static void vbi_out_stop_streaming(struct vb2_queue *vq)
 120 {
 121         struct vivid_dev *dev = vb2_get_drv_priv(vq);
 122
 123         dprintk(dev, 1, "%s\n", __func__);
 124         vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
 125         dev->vbi_out_have_wss = false;
 126         dev->vbi_out_have_cc[0] = false;
 127         dev->vbi_out_have_cc[1] = false;
 128 }
 129
 130 const struct vb2_ops vivid_vbi_out_qops = {
 131         .queue_setup            = vbi_out_queue_setup,
 132         .buf_prepare            = vbi_out_buf_prepare,
 133         .buf_queue              = vbi_out_buf_queue,
 134         .start_streaming        = vbi_out_start_streaming,
 135         .stop_streaming         = vbi_out_stop_streaming,
 136         .wait_prepare           = vb2_ops_wait_prepare,
 137         .wait_finish            = vb2_ops_wait_finish,
 138 };
 139
 140 int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
 141                                         struct v4l2_format *f)
 142 {
 143         struct vivid_dev *dev = video_drvdata(file);
 144         struct v4l2_vbi_format *vbi = &f->fmt.vbi;
 145         bool is_60hz = dev->std_out & V4L2_STD_525_60;
 146
 147         if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
 148                 return -EINVAL;
 149
 150         vbi->sampling_rate = 25000000;
 151         vbi->offset = 24;
 152         vbi->samples_per_line = 1440;
 153         vbi->sample_format = V4L2_PIX_FMT_GREY;
 154         vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
 155         vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
 156         vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
 157         vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
 158         vbi->reserved[0] = 0;
 159         vbi->reserved[1] = 0;
 160         return 0;
 161 }
 162
 163 int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
 164                                         struct v4l2_format *f)
 165 {
 166         struct vivid_dev *dev = video_drvdata(file);
 167         int ret = vidioc_g_fmt_vbi_out(file, priv, f);
 168
 169         if (ret)
 170                 return ret;
 171         if (vb2_is_busy(&dev->vb_vbi_out_q))
 172                 return -EBUSY;
 173         dev->stream_sliced_vbi_out = false;
 174         dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
 175         return 0;
 176 }
 177
 178 int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 179 {
 180         struct vivid_dev *dev = video_drvdata(file);
 181         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 182
 183         if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 184                 return -EINVAL;
 185
 186         vivid_fill_service_lines(vbi, dev->service_set_out);
 187         return 0;
 188 }
 189
 190 int vidioc_try_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 191 {
 192         struct vivid_dev *dev = video_drvdata(file);
 193         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 194         bool is_60hz = dev->std_out & V4L2_STD_525_60;
 195         u32 service_set = vbi->service_set;
 196
 197         if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 198                 return -EINVAL;
 199
 200         service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
 201                                  V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
 202         vivid_fill_service_lines(vbi, service_set);
 203         return 0;
 204 }
 205
 206 int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,
 207                 struct v4l2_format *fmt)
 208 {
 209         struct vivid_dev *dev = video_drvdata(file);
 210         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 211         int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
 212
 213         if (ret)
 214                 return ret;
 215         if (vb2_is_busy(&dev->vb_vbi_out_q))
 216                 return -EBUSY;
 217         dev->service_set_out = vbi->service_set;
 218         dev->stream_sliced_vbi_out = true;
 219         dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
 220         return 0;
 221 }
 222
 223 void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
 224                 struct vivid_buffer *buf)
 225 {
 226         struct v4l2_sliced_vbi_data *vbi =
 227                 vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 228         unsigned elems =
 229                 vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);
 230
 231         dev->vbi_out_have_cc[0] = false;
 232         dev->vbi_out_have_cc[1] = false;
 233         dev->vbi_out_have_wss = false;
 234         while (elems--) {
 235                 switch (vbi->id) {
 236                 case V4L2_SLICED_CAPTION_525:
 237                         if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
 238                                 dev->vbi_out_have_cc[!!vbi->field] = true;
 239                                 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
 240                                 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
 241                         }
 242                         break;
 243                 case V4L2_SLICED_WSS_625:
 244                         if ((dev->std_out & V4L2_STD_625_50) &&
 245                             vbi->field == 0 && vbi->line == 23) {
 246                                 dev->vbi_out_have_wss = true;
 247                                 dev->vbi_out_wss[0] = vbi->data[0];
 248                                 dev->vbi_out_wss[1] = vbi->data[1];
 249                         }
 250                         break;
 251                 }
 252                 vbi++;
 253         }
 254 }