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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * vivid-vbi-out.c - vbi output support functions.
   4  *
   5  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   6  */
   7
   8 #include <linux/errno.h>
   9 #include <linux/kernel.h>
  10 #include <linux/videodev2.h>
  11 #include <media/v4l2-common.h>
  12
  13 #include "vivid-core.h"
  14 #include "vivid-kthread-out.h"
  15 #include "vivid-vbi-out.h"
  16 #include "vivid-vbi-cap.h"
  17
  18 static int vbi_out_queue_setup(struct vb2_queue *vq,
  19                        unsigned *nbuffers, unsigned *nplanes,
  20                        unsigned sizes[], struct device *alloc_devs[])
  21 {
  22         struct vivid_dev *dev = vb2_get_drv_priv(vq);
  23         bool is_60hz = dev->std_out & V4L2_STD_525_60;
  24         unsigned size = vq->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
  25                 36 * sizeof(struct v4l2_sliced_vbi_data) :
  26                 1440 * 2 * (is_60hz ? 12 : 18);
  27
  28         if (!vivid_is_svid_out(dev))
  29                 return -EINVAL;
  30
  31         sizes[0] = size;
  32
  33         if (vq->num_buffers + *nbuffers < 2)
  34                 *nbuffers = 2 - vq->num_buffers;
  35
  36         *nplanes = 1;
  37         return 0;
  38 }
  39
  40 static int vbi_out_buf_prepare(struct vb2_buffer *vb)
  41 {
  42         struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
  43         bool is_60hz = dev->std_out & V4L2_STD_525_60;
  44         unsigned size = vb->vb2_queue->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT ?
  45                 36 * sizeof(struct v4l2_sliced_vbi_data) :
  46                 1440 * 2 * (is_60hz ? 12 : 18);
  47
  48         dprintk(dev, 1, "%s\n", __func__);
  49
  50         if (dev->buf_prepare_error) {
  51                 /*
  52                  * Error injection: test what happens if buf_prepare() returns
  53                  * an error.
  54                  */
  55                 dev->buf_prepare_error = false;
  56                 return -EINVAL;
  57         }
  58         if (vb2_plane_size(vb, 0) < size) {
  59                 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
  60                                 __func__, vb2_plane_size(vb, 0), size);
  61                 return -EINVAL;
  62         }
  63         vb2_set_plane_payload(vb, 0, size);
  64
  65         return 0;
  66 }
  67
  68 static void vbi_out_buf_queue(struct vb2_buffer *vb)
  69 {
  70         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
  71         struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
  72         struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
  73
  74         dprintk(dev, 1, "%s\n", __func__);
  75
  76         spin_lock(&dev->slock);
  77         list_add_tail(&buf->list, &dev->vbi_out_active);
  78         spin_unlock(&dev->slock);
  79 }
  80
  81 static int vbi_out_start_streaming(struct vb2_queue *vq, unsigned count)
  82 {
  83         struct vivid_dev *dev = vb2_get_drv_priv(vq);
  84         int err;
  85
  86         dprintk(dev, 1, "%s\n", __func__);
  87         dev->vbi_out_seq_count = 0;
  88         if (dev->start_streaming_error) {
  89                 dev->start_streaming_error = false;
  90                 err = -EINVAL;
  91         } else {
  92                 err = vivid_start_generating_vid_out(dev, &dev->vbi_out_streaming);
  93         }
  94         if (err) {
  95                 struct vivid_buffer *buf, *tmp;
  96
  97                 list_for_each_entry_safe(buf, tmp, &dev->vbi_out_active, list) {
  98                         list_del(&buf->list);
  99                         vb2_buffer_done(&buf->vb.vb2_buf,
 100                                         VB2_BUF_STATE_QUEUED);
 101                 }
 102         }
 103         return err;
 104 }
 105
 106 /* abort streaming and wait for last buffer */
 107 static void vbi_out_stop_streaming(struct vb2_queue *vq)
 108 {
 109         struct vivid_dev *dev = vb2_get_drv_priv(vq);
 110
 111         dprintk(dev, 1, "%s\n", __func__);
 112         vivid_stop_generating_vid_out(dev, &dev->vbi_out_streaming);
 113         dev->vbi_out_have_wss = false;
 114         dev->vbi_out_have_cc[0] = false;
 115         dev->vbi_out_have_cc[1] = false;
 116 }
 117
 118 const struct vb2_ops vivid_vbi_out_qops = {
 119         .queue_setup            = vbi_out_queue_setup,
 120         .buf_prepare            = vbi_out_buf_prepare,
 121         .buf_queue              = vbi_out_buf_queue,
 122         .start_streaming        = vbi_out_start_streaming,
 123         .stop_streaming         = vbi_out_stop_streaming,
 124         .wait_prepare           = vb2_ops_wait_prepare,
 125         .wait_finish            = vb2_ops_wait_finish,
 126 };
 127
 128 int vidioc_g_fmt_vbi_out(struct file *file, void *priv,
 129                                         struct v4l2_format *f)
 130 {
 131         struct vivid_dev *dev = video_drvdata(file);
 132         struct v4l2_vbi_format *vbi = &f->fmt.vbi;
 133         bool is_60hz = dev->std_out & V4L2_STD_525_60;
 134
 135         if (!vivid_is_svid_out(dev) || !dev->has_raw_vbi_out)
 136                 return -EINVAL;
 137
 138         vbi->sampling_rate = 25000000;
 139         vbi->offset = 24;
 140         vbi->samples_per_line = 1440;
 141         vbi->sample_format = V4L2_PIX_FMT_GREY;
 142         vbi->start[0] = is_60hz ? V4L2_VBI_ITU_525_F1_START + 9 : V4L2_VBI_ITU_625_F1_START + 5;
 143         vbi->start[1] = is_60hz ? V4L2_VBI_ITU_525_F2_START + 9 : V4L2_VBI_ITU_625_F2_START + 5;
 144         vbi->count[0] = vbi->count[1] = is_60hz ? 12 : 18;
 145         vbi->flags = dev->vbi_cap_interlaced ? V4L2_VBI_INTERLACED : 0;
 146         vbi->reserved[0] = 0;
 147         vbi->reserved[1] = 0;
 148         return 0;
 149 }
 150
 151 int vidioc_s_fmt_vbi_out(struct file *file, void *priv,
 152                                         struct v4l2_format *f)
 153 {
 154         struct vivid_dev *dev = video_drvdata(file);
 155         int ret = vidioc_g_fmt_vbi_out(file, priv, f);
 156
 157         if (ret)
 158                 return ret;
 159         if (vb2_is_busy(&dev->vb_vbi_out_q))
 160                 return -EBUSY;
 161         dev->stream_sliced_vbi_out = false;
 162         dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_VBI_OUTPUT;
 163         return 0;
 164 }
 165
 166 int vidioc_g_fmt_sliced_vbi_out(struct file *file, void *fh, struct v4l2_format *fmt)
 167 {
 168         struct vivid_dev *dev = video_drvdata(file);
 169         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 170
 171         if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 172                 return -EINVAL;
 173
 174         vivid_fill_service_lines(vbi, dev->service_set_out);
 175         return 0;
 176 }
 177
 178 int vidioc_try_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         bool is_60hz = dev->std_out & V4L2_STD_525_60;
 183         u32 service_set = vbi->service_set;
 184
 185         if (!vivid_is_svid_out(dev) || !dev->has_sliced_vbi_out)
 186                 return -EINVAL;
 187
 188         service_set &= is_60hz ? V4L2_SLICED_CAPTION_525 :
 189                                  V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
 190         vivid_fill_service_lines(vbi, service_set);
 191         return 0;
 192 }
 193
 194 int vidioc_s_fmt_sliced_vbi_out(struct file *file, void *fh,
 195                 struct v4l2_format *fmt)
 196 {
 197         struct vivid_dev *dev = video_drvdata(file);
 198         struct v4l2_sliced_vbi_format *vbi = &fmt->fmt.sliced;
 199         int ret = vidioc_try_fmt_sliced_vbi_out(file, fh, fmt);
 200
 201         if (ret)
 202                 return ret;
 203         if (vb2_is_busy(&dev->vb_vbi_out_q))
 204                 return -EBUSY;
 205         dev->service_set_out = vbi->service_set;
 206         dev->stream_sliced_vbi_out = true;
 207         dev->vbi_out_dev.queue->type = V4L2_BUF_TYPE_SLICED_VBI_OUTPUT;
 208         return 0;
 209 }
 210
 211 void vivid_sliced_vbi_out_process(struct vivid_dev *dev,
 212                 struct vivid_buffer *buf)
 213 {
 214         struct v4l2_sliced_vbi_data *vbi =
 215                 vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 216         unsigned elems =
 217                 vb2_get_plane_payload(&buf->vb.vb2_buf, 0) / sizeof(*vbi);
 218
 219         dev->vbi_out_have_cc[0] = false;
 220         dev->vbi_out_have_cc[1] = false;
 221         dev->vbi_out_have_wss = false;
 222         while (elems--) {
 223                 switch (vbi->id) {
 224                 case V4L2_SLICED_CAPTION_525:
 225                         if ((dev->std_out & V4L2_STD_525_60) && vbi->line == 21) {
 226                                 dev->vbi_out_have_cc[!!vbi->field] = true;
 227                                 dev->vbi_out_cc[!!vbi->field][0] = vbi->data[0];
 228                                 dev->vbi_out_cc[!!vbi->field][1] = vbi->data[1];
 229                         }
 230                         break;
 231                 case V4L2_SLICED_WSS_625:
 232                         if ((dev->std_out & V4L2_STD_625_50) &&
 233                             vbi->field == 0 && vbi->line == 23) {
 234                                 dev->vbi_out_have_wss = true;
 235                                 dev->vbi_out_wss[0] = vbi->data[0];
 236                                 dev->vbi_out_wss[1] = vbi->data[1];
 237                         }
 238                         break;
 239                 }
 240                 vbi++;
 241         }
 242 }