// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vivid-touch-cap.c - touch support functions.
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*/
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#include "vivid-core.h"
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#include "vivid-kthread-touch.h"
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#include "vivid-vid-common.h"
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#include "vivid-touch-cap.h"
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static int touch_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
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unsigned int *nplanes, unsigned int sizes[],
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struct device *alloc_devs[])
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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struct v4l2_pix_format *f = &dev->tch_format;
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unsigned int size = f->sizeimage;
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if (*nplanes) {
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if (sizes[0] < size)
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return -EINVAL;
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} else {
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sizes[0] = size;
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}
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if (vq->num_buffers + *nbuffers < 2)
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*nbuffers = 2 - vq->num_buffers;
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*nplanes = 1;
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return 0;
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}
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static int touch_cap_buf_prepare(struct vb2_buffer *vb)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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struct v4l2_pix_format *f = &dev->tch_format;
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unsigned int size = f->sizeimage;
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if (dev->buf_prepare_error) {
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/*
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* Error injection: test what happens if buf_prepare() returns
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* an error.
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*/
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dev->buf_prepare_error = false;
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return -EINVAL;
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}
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if (vb2_plane_size(vb, 0) < size) {
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dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
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__func__, vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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return 0;
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}
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static void touch_cap_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
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vbuf->field = V4L2_FIELD_NONE;
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spin_lock(&dev->slock);
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list_add_tail(&buf->list, &dev->touch_cap_active);
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spin_unlock(&dev->slock);
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}
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static int touch_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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int err;
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dev->touch_cap_seq_count = 0;
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if (dev->start_streaming_error) {
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dev->start_streaming_error = false;
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err = -EINVAL;
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} else {
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err = vivid_start_generating_touch_cap(dev);
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}
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if (err) {
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struct vivid_buffer *buf, *tmp;
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list_for_each_entry_safe(buf, tmp,
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&dev->touch_cap_active, list) {
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list_del(&buf->list);
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vb2_buffer_done(&buf->vb.vb2_buf,
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VB2_BUF_STATE_QUEUED);
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}
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}
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return err;
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}
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/* abort streaming and wait for last buffer */
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static void touch_cap_stop_streaming(struct vb2_queue *vq)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vq);
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vivid_stop_generating_touch_cap(dev);
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}
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static void touch_cap_buf_request_complete(struct vb2_buffer *vb)
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{
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struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
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v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_touch_cap);
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}
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const struct vb2_ops vivid_touch_cap_qops = {
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.queue_setup = touch_cap_queue_setup,
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.buf_prepare = touch_cap_buf_prepare,
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.buf_queue = touch_cap_buf_queue,
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.start_streaming = touch_cap_start_streaming,
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.stop_streaming = touch_cap_stop_streaming,
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.buf_request_complete = touch_cap_buf_request_complete,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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int vivid_enum_fmt_tch(struct file *file, void *priv, struct v4l2_fmtdesc *f)
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{
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if (f->index)
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return -EINVAL;
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f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
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return 0;
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}
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int vivid_g_fmt_tch(struct file *file, void *priv, struct v4l2_format *f)
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{
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struct vivid_dev *dev = video_drvdata(file);
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if (dev->multiplanar)
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return -ENOTTY;
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f->fmt.pix = dev->tch_format;
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return 0;
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}
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int vivid_g_fmt_tch_mplane(struct file *file, void *priv, struct v4l2_format *f)
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{
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struct vivid_dev *dev = video_drvdata(file);
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struct v4l2_format sp_fmt;
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if (!dev->multiplanar)
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return -ENOTTY;
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sp_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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sp_fmt.fmt.pix = dev->tch_format;
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fmt_sp2mp(&sp_fmt, f);
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return 0;
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}
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int vivid_g_parm_tch(struct file *file, void *priv,
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struct v4l2_streamparm *parm)
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{
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struct vivid_dev *dev = video_drvdata(file);
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if (parm->type != (dev->multiplanar ?
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V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
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V4L2_BUF_TYPE_VIDEO_CAPTURE))
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return -EINVAL;
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parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
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parm->parm.capture.timeperframe = dev->timeperframe_tch_cap;
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parm->parm.capture.readbuffers = 1;
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return 0;
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}
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int vivid_enum_input_tch(struct file *file, void *priv, struct v4l2_input *inp)
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{
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if (inp->index)
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return -EINVAL;
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inp->type = V4L2_INPUT_TYPE_TOUCH;
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strscpy(inp->name, "Vivid Touch", sizeof(inp->name));
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inp->capabilities = 0;
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return 0;
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}
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int vivid_g_input_tch(struct file *file, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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int vivid_set_touch(struct vivid_dev *dev, unsigned int i)
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{
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struct v4l2_pix_format *f = &dev->tch_format;
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if (i)
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return -EINVAL;
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f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
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f->width = VIVID_TCH_WIDTH;
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f->height = VIVID_TCH_HEIGHT;
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f->field = V4L2_FIELD_NONE;
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f->colorspace = V4L2_COLORSPACE_RAW;
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f->bytesperline = f->width * sizeof(s16);
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f->sizeimage = f->width * f->height * sizeof(s16);
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return 0;
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}
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int vivid_s_input_tch(struct file *file, void *priv, unsigned int i)
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{
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return vivid_set_touch(video_drvdata(file), i);
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}
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static void vivid_fill_buff_noise(__s16 *tch_buf, int size)
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{
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int i;
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/* Fill 10% of the values within range -3 and 3, zero the others */
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for (i = 0; i < size; i++) {
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unsigned int rand = get_random_int();
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if (rand % 10)
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tch_buf[i] = 0;
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else
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tch_buf[i] = (rand / 10) % 7 - 3;
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}
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}
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static inline int get_random_pressure(void)
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{
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return get_random_int() % VIVID_PRESSURE_LIMIT;
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}
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static void vivid_tch_buf_set(struct v4l2_pix_format *f,
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__s16 *tch_buf,
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int index)
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{
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unsigned int x = index % f->width;
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unsigned int y = index / f->width;
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unsigned int offset = VIVID_MIN_PRESSURE;
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tch_buf[index] = offset + get_random_pressure();
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offset /= 2;
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if (x)
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tch_buf[index - 1] = offset + get_random_pressure();
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if (x < f->width - 1)
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tch_buf[index + 1] = offset + get_random_pressure();
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if (y)
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tch_buf[index - f->width] = offset + get_random_pressure();
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if (y < f->height - 1)
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tch_buf[index + f->width] = offset + get_random_pressure();
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offset /= 2;
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if (x && y)
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tch_buf[index - 1 - f->width] = offset + get_random_pressure();
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if (x < f->width - 1 && y)
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tch_buf[index + 1 - f->width] = offset + get_random_pressure();
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if (x && y < f->height - 1)
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tch_buf[index - 1 + f->width] = offset + get_random_pressure();
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if (x < f->width - 1 && y < f->height - 1)
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tch_buf[index + 1 + f->width] = offset + get_random_pressure();
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}
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void vivid_fillbuff_tch(struct vivid_dev *dev, struct vivid_buffer *buf)
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{
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struct v4l2_pix_format *f = &dev->tch_format;
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int size = f->width * f->height;
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int x, y, xstart, ystart, offset_x, offset_y;
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unsigned int test_pattern, test_pat_idx, rand;
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__s16 *tch_buf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
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buf->vb.sequence = dev->touch_cap_seq_count;
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test_pattern = (buf->vb.sequence / TCH_SEQ_COUNT) % TEST_CASE_MAX;
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test_pat_idx = buf->vb.sequence % TCH_SEQ_COUNT;
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vivid_fill_buff_noise(tch_buf, size);
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if (test_pat_idx >= TCH_PATTERN_COUNT)
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return;
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if (test_pat_idx == 0)
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dev->tch_pat_random = get_random_int();
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rand = dev->tch_pat_random;
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switch (test_pattern) {
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case SINGLE_TAP:
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if (test_pat_idx == 2)
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vivid_tch_buf_set(f, tch_buf, rand % size);
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break;
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case DOUBLE_TAP:
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if (test_pat_idx == 2 || test_pat_idx == 4)
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vivid_tch_buf_set(f, tch_buf, rand % size);
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break;
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case TRIPLE_TAP:
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if (test_pat_idx == 2 || test_pat_idx == 4 || test_pat_idx == 6)
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vivid_tch_buf_set(f, tch_buf, rand % size);
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break;
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case MOVE_LEFT_TO_RIGHT:
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vivid_tch_buf_set(f, tch_buf,
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(rand % f->height) * f->width +
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test_pat_idx *
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(f->width / TCH_PATTERN_COUNT));
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break;
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case ZOOM_IN:
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x = f->width / 2;
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y = f->height / 2;
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offset_x = ((TCH_PATTERN_COUNT - 1 - test_pat_idx) * x) /
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TCH_PATTERN_COUNT;
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offset_y = ((TCH_PATTERN_COUNT - 1 - test_pat_idx) * y) /
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TCH_PATTERN_COUNT;
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vivid_tch_buf_set(f, tch_buf,
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(x - offset_x) + f->width * (y - offset_y));
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vivid_tch_buf_set(f, tch_buf,
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(x + offset_x) + f->width * (y + offset_y));
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break;
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case ZOOM_OUT:
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x = f->width / 2;
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y = f->height / 2;
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offset_x = (test_pat_idx * x) / TCH_PATTERN_COUNT;
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offset_y = (test_pat_idx * y) / TCH_PATTERN_COUNT;
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vivid_tch_buf_set(f, tch_buf,
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(x - offset_x) + f->width * (y - offset_y));
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vivid_tch_buf_set(f, tch_buf,
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(x + offset_x) + f->width * (y + offset_y));
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break;
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case PALM_PRESS:
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for (x = 0; x < f->width; x++)
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for (y = f->height / 2; y < f->height; y++)
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tch_buf[x + f->width * y] = VIVID_MIN_PRESSURE +
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get_random_pressure();
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break;
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case MULTIPLE_PRESS:
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/* 16 pressure points */
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for (y = 0; y < 4; y++) {
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for (x = 0; x < 4; x++) {
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ystart = (y * f->height) / 4 + f->height / 8;
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xstart = (x * f->width) / 4 + f->width / 8;
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vivid_tch_buf_set(f, tch_buf,
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ystart * f->width + xstart);
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}
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}
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break;
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}
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#ifdef __BIG_ENDIAN__
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for (x = 0; x < size; x++)
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tch_buf[x] = (__force s16)__cpu_to_le16((u16)tch_buf[x]);
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#endif
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}
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