1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * vivid-meta-out.c - meta output support functions. 4 */ 5 6 #include <linux/errno.h> 7 #include <linux/kernel.h> 8 #include <linux/videodev2.h> 9 #include <media/v4l2-common.h> 10 #include <linux/usb/video.h> 11 12 #include "vivid-core.h" 13 #include "vivid-kthread-out.h" 14 #include "vivid-meta-out.h" 15 16 static int meta_out_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, 17 unsigned int *nplanes, unsigned int sizes[], 18 struct device *alloc_devs[]) 19 { 20 struct vivid_dev *dev = vb2_get_drv_priv(vq); 21 unsigned int size = sizeof(struct vivid_meta_out_buf); 22 23 if (!vivid_is_webcam(dev)) 24 return -EINVAL; 25 26 if (*nplanes) { 27 if (sizes[0] < size) 28 return -EINVAL; 29 } else { 30 sizes[0] = size; 31 } 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 meta_out_buf_prepare(struct vb2_buffer *vb) 41 { 42 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 43 unsigned int size = sizeof(struct vivid_meta_out_buf); 44 45 dprintk(dev, 1, "%s\n", __func__); 46 47 if (dev->buf_prepare_error) { 48 /* 49 * Error injection: test what happens if buf_prepare() returns 50 * an error. 51 */ 52 dev->buf_prepare_error = false; 53 return -EINVAL; 54 } 55 if (vb2_plane_size(vb, 0) < size) { 56 dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n", 57 __func__, vb2_plane_size(vb, 0), size); 58 return -EINVAL; 59 } 60 vb2_set_plane_payload(vb, 0, size); 61 62 return 0; 63 } 64 65 static void meta_out_buf_queue(struct vb2_buffer *vb) 66 { 67 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 68 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 69 struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb); 70 71 dprintk(dev, 1, "%s\n", __func__); 72 73 spin_lock(&dev->slock); 74 list_add_tail(&buf->list, &dev->meta_out_active); 75 spin_unlock(&dev->slock); 76 } 77 78 static int meta_out_start_streaming(struct vb2_queue *vq, unsigned int count) 79 { 80 struct vivid_dev *dev = vb2_get_drv_priv(vq); 81 int err; 82 83 dprintk(dev, 1, "%s\n", __func__); 84 dev->meta_out_seq_count = 0; 85 if (dev->start_streaming_error) { 86 dev->start_streaming_error = false; 87 err = -EINVAL; 88 } else { 89 err = vivid_start_generating_vid_out(dev, 90 &dev->meta_out_streaming); 91 } 92 if (err) { 93 struct vivid_buffer *buf, *tmp; 94 95 list_for_each_entry_safe(buf, tmp, 96 &dev->meta_out_active, list) { 97 list_del(&buf->list); 98 vb2_buffer_done(&buf->vb.vb2_buf, 99 VB2_BUF_STATE_QUEUED); 100 } 101 } 102 return err; 103 } 104 105 /* abort streaming and wait for last buffer */ 106 static void meta_out_stop_streaming(struct vb2_queue *vq) 107 { 108 struct vivid_dev *dev = vb2_get_drv_priv(vq); 109 110 dprintk(dev, 1, "%s\n", __func__); 111 vivid_stop_generating_vid_out(dev, &dev->meta_out_streaming); 112 } 113 114 static void meta_out_buf_request_complete(struct vb2_buffer *vb) 115 { 116 struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue); 117 118 v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_meta_out); 119 } 120 121 const struct vb2_ops vivid_meta_out_qops = { 122 .queue_setup = meta_out_queue_setup, 123 .buf_prepare = meta_out_buf_prepare, 124 .buf_queue = meta_out_buf_queue, 125 .start_streaming = meta_out_start_streaming, 126 .stop_streaming = meta_out_stop_streaming, 127 .buf_request_complete = meta_out_buf_request_complete, 128 .wait_prepare = vb2_ops_wait_prepare, 129 .wait_finish = vb2_ops_wait_finish, 130 }; 131 132 int vidioc_enum_fmt_meta_out(struct file *file, void *priv, 133 struct v4l2_fmtdesc *f) 134 { 135 struct vivid_dev *dev = video_drvdata(file); 136 137 if (!vivid_is_webcam(dev)) 138 return -EINVAL; 139 140 if (f->index > 0) 141 return -EINVAL; 142 143 f->type = V4L2_BUF_TYPE_META_OUTPUT; 144 f->pixelformat = V4L2_META_FMT_VIVID; 145 return 0; 146 } 147 148 int vidioc_g_fmt_meta_out(struct file *file, void *priv, 149 struct v4l2_format *f) 150 { 151 struct vivid_dev *dev = video_drvdata(file); 152 struct v4l2_meta_format *meta = &f->fmt.meta; 153 154 if (!vivid_is_webcam(dev) || !dev->has_meta_out) 155 return -EINVAL; 156 157 meta->dataformat = V4L2_META_FMT_VIVID; 158 meta->buffersize = sizeof(struct vivid_meta_out_buf); 159 return 0; 160 } 161 162 void vivid_meta_out_process(struct vivid_dev *dev, 163 struct vivid_buffer *buf) 164 { 165 struct vivid_meta_out_buf *meta = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); 166 167 v4l2_ctrl_s_ctrl(dev->brightness, meta->brightness); 168 v4l2_ctrl_s_ctrl(dev->contrast, meta->contrast); 169 v4l2_ctrl_s_ctrl(dev->saturation, meta->saturation); 170 v4l2_ctrl_s_ctrl(dev->hue, meta->hue); 171 172 dprintk(dev, 2, " %s brightness %u contrast %u saturation %u hue %d\n", 173 __func__, meta->brightness, meta->contrast, 174 meta->saturation, meta->hue); 175 } 176