^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * vivid-kthread-touch.c - touch capture thread support functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/freezer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "vivid-core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "vivid-kthread-touch.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "vivid-touch-cap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static noinline_for_stack void vivid_thread_tch_cap_tick(struct vivid_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) int dropped_bufs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct vivid_buffer *tch_cap_buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) spin_lock(&dev->slock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) if (!list_empty(&dev->touch_cap_active)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) tch_cap_buf = list_entry(dev->touch_cap_active.next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct vivid_buffer, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) list_del(&tch_cap_buf->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) spin_unlock(&dev->slock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) if (tch_cap_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) v4l2_ctrl_request_setup(tch_cap_buf->vb.vb2_buf.req_obj.req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) &dev->ctrl_hdl_touch_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) vivid_fillbuff_tch(dev, tch_cap_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) v4l2_ctrl_request_complete(tch_cap_buf->vb.vb2_buf.req_obj.req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) &dev->ctrl_hdl_touch_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) vb2_buffer_done(&tch_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) dprintk(dev, 2, "touch_cap buffer %d done\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) tch_cap_buf->vb.vb2_buf.index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) tch_cap_buf->vb.vb2_buf.timestamp = ktime_get_ns() + dev->time_wrap_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) dev->dqbuf_error = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int vivid_thread_touch_cap(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct vivid_dev *dev = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u64 numerators_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) u64 buffers_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u64 next_jiffies_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) unsigned long jiffies_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) unsigned long cur_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned int wait_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned int numerator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned int denominator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int dropped_bufs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) dprintk(dev, 1, "Touch Capture Thread Start\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) set_freezable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* Resets frame counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) dev->touch_cap_seq_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev->touch_cap_seq_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dev->touch_cap_seq_resync = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) dev->jiffies_touch_cap = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) try_to_freeze();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (kthread_should_stop())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (!mutex_trylock(&dev->mutex)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) schedule_timeout_uninterruptible(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) cur_jiffies = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (dev->touch_cap_seq_resync) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) dev->jiffies_touch_cap = cur_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) dev->touch_cap_seq_offset = dev->touch_cap_seq_count + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) dev->touch_cap_seq_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dev->cap_seq_resync = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) denominator = dev->timeperframe_tch_cap.denominator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) numerator = dev->timeperframe_tch_cap.numerator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* Calculate the number of jiffies since we started streaming */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) jiffies_since_start = cur_jiffies - dev->jiffies_touch_cap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /* Get the number of buffers streamed since the start */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) buffers_since_start = (u64)jiffies_since_start * denominator +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) (HZ * numerator) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) do_div(buffers_since_start, HZ * numerator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * After more than 0xf0000000 (rounded down to a multiple of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * jiffies have passed since we started streaming reset the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * counters and keep track of the sequence offset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (jiffies_since_start > JIFFIES_RESYNC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) dev->jiffies_touch_cap = cur_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) dev->cap_seq_offset = buffers_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) buffers_since_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) dropped_bufs = buffers_since_start + dev->touch_cap_seq_offset - dev->touch_cap_seq_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) dev->touch_cap_seq_count = buffers_since_start + dev->touch_cap_seq_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) vivid_thread_tch_cap_tick(dev, dropped_bufs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * Calculate the number of 'numerators' streamed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * since we started, including the current buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) numerators_since_start = ++buffers_since_start * numerator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* And the number of jiffies since we started */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) jiffies_since_start = jiffies - dev->jiffies_touch_cap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) mutex_unlock(&dev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Calculate when that next buffer is supposed to start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * in jiffies since we started streaming.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) next_jiffies_since_start = numerators_since_start * HZ +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) denominator / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) do_div(next_jiffies_since_start, denominator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* If it is in the past, then just schedule asap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (next_jiffies_since_start < jiffies_since_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) next_jiffies_since_start = jiffies_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) wait_jiffies = next_jiffies_since_start - jiffies_since_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dprintk(dev, 1, "Touch Capture Thread End\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int vivid_start_generating_touch_cap(struct vivid_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (dev->kthread_touch_cap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dev->touch_cap_streaming = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) dev->kthread_touch_cap = kthread_run(vivid_thread_touch_cap, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) "%s-tch-cap", dev->v4l2_dev.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (IS_ERR(dev->kthread_touch_cap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) int err = PTR_ERR(dev->kthread_touch_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) dev->kthread_touch_cap = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) dev->touch_cap_streaming = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) dprintk(dev, 1, "returning from %s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) void vivid_stop_generating_touch_cap(struct vivid_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (!dev->kthread_touch_cap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) dev->touch_cap_streaming = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) while (!list_empty(&dev->touch_cap_active)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct vivid_buffer *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) buf = list_entry(dev->touch_cap_active.next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct vivid_buffer, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) list_del(&buf->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) v4l2_ctrl_request_complete(buf->vb.vb2_buf.req_obj.req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) &dev->ctrl_hdl_touch_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) dprintk(dev, 2, "touch_cap buffer %d done\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) buf->vb.vb2_buf.index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) kthread_stop(dev->kthread_touch_cap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) dev->kthread_touch_cap = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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