diff options
Diffstat (limited to 'drivers/media/platform/vivid/vivid-kthread-out.c')
| -rw-r--r-- | drivers/media/platform/vivid/vivid-kthread-out.c | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/drivers/media/platform/vivid/vivid-kthread-out.c b/drivers/media/platform/vivid/vivid-kthread-out.c deleted file mode 100644 index 98eed5889bc1..000000000000 --- a/drivers/media/platform/vivid/vivid-kthread-out.c +++ /dev/null @@ -1,305 +0,0 @@ -/* - * vivid-kthread-out.h - video/vbi output thread support functions. - * - * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. - * - * This program is free software; you may redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/font.h> -#include <linux/mutex.h> -#include <linux/videodev2.h> -#include <linux/kthread.h> -#include <linux/freezer.h> -#include <linux/random.h> -#include <linux/v4l2-dv-timings.h> -#include <asm/div64.h> -#include <media/videobuf2-vmalloc.h> -#include <media/v4l2-dv-timings.h> -#include <media/v4l2-ioctl.h> -#include <media/v4l2-fh.h> -#include <media/v4l2-event.h> - -#include "vivid-core.h" -#include "vivid-vid-common.h" -#include "vivid-vid-cap.h" -#include "vivid-vid-out.h" -#include "vivid-radio-common.h" -#include "vivid-radio-rx.h" -#include "vivid-radio-tx.h" -#include "vivid-sdr-cap.h" -#include "vivid-vbi-cap.h" -#include "vivid-vbi-out.h" -#include "vivid-osd.h" -#include "vivid-ctrls.h" -#include "vivid-kthread-out.h" - -static void vivid_thread_vid_out_tick(struct vivid_dev *dev) -{ - struct vivid_buffer *vid_out_buf = NULL; - struct vivid_buffer *vbi_out_buf = NULL; - - dprintk(dev, 1, "Video Output Thread Tick\n"); - - /* Drop a certain percentage of buffers. */ - if (dev->perc_dropped_buffers && - prandom_u32_max(100) < dev->perc_dropped_buffers) - return; - - spin_lock(&dev->slock); - /* - * Only dequeue buffer if there is at least one more pending. - * This makes video loopback possible. - */ - if (!list_empty(&dev->vid_out_active) && - !list_is_singular(&dev->vid_out_active)) { - vid_out_buf = list_entry(dev->vid_out_active.next, - struct vivid_buffer, list); - list_del(&vid_out_buf->list); - } - if (!list_empty(&dev->vbi_out_active) && - (dev->field_out != V4L2_FIELD_ALTERNATE || - (dev->vbi_out_seq_count & 1))) { - vbi_out_buf = list_entry(dev->vbi_out_active.next, - struct vivid_buffer, list); - list_del(&vbi_out_buf->list); - } - spin_unlock(&dev->slock); - - if (!vid_out_buf && !vbi_out_buf) - return; - - if (vid_out_buf) { - vid_out_buf->vb.sequence = dev->vid_out_seq_count; - if (dev->field_out == V4L2_FIELD_ALTERNATE) { - /* - * The sequence counter counts frames, not fields. - * So divide by two. - */ - vid_out_buf->vb.sequence /= 2; - } - vid_out_buf->vb.vb2_buf.timestamp = - ktime_get_ns() + dev->time_wrap_offset; - vb2_buffer_done(&vid_out_buf->vb.vb2_buf, dev->dqbuf_error ? - VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); - dprintk(dev, 2, "vid_out buffer %d done\n", - vid_out_buf->vb.vb2_buf.index); - } - - if (vbi_out_buf) { - if (dev->stream_sliced_vbi_out) - vivid_sliced_vbi_out_process(dev, vbi_out_buf); - - vbi_out_buf->vb.sequence = dev->vbi_out_seq_count; - vbi_out_buf->vb.vb2_buf.timestamp = - ktime_get_ns() + dev->time_wrap_offset; - vb2_buffer_done(&vbi_out_buf->vb.vb2_buf, dev->dqbuf_error ? - VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); - dprintk(dev, 2, "vbi_out buffer %d done\n", - vbi_out_buf->vb.vb2_buf.index); - } - dev->dqbuf_error = false; -} - -static int vivid_thread_vid_out(void *data) -{ - struct vivid_dev *dev = data; - u64 numerators_since_start; - u64 buffers_since_start; - u64 next_jiffies_since_start; - unsigned long jiffies_since_start; - unsigned long cur_jiffies; - unsigned wait_jiffies; - unsigned numerator; - unsigned denominator; - - dprintk(dev, 1, "Video Output Thread Start\n"); - - set_freezable(); - - /* Resets frame counters */ - dev->out_seq_offset = 0; - if (dev->seq_wrap) - dev->out_seq_count = 0xffffff80U; - dev->jiffies_vid_out = jiffies; - dev->vid_out_seq_start = dev->vbi_out_seq_start = 0; - dev->out_seq_resync = false; - - for (;;) { - try_to_freeze(); - if (kthread_should_stop()) - break; - - mutex_lock(&dev->mutex); - cur_jiffies = jiffies; - if (dev->out_seq_resync) { - dev->jiffies_vid_out = cur_jiffies; - dev->out_seq_offset = dev->out_seq_count + 1; - dev->out_seq_count = 0; - dev->out_seq_resync = false; - } - numerator = dev->timeperframe_vid_out.numerator; - denominator = dev->timeperframe_vid_out.denominator; - - if (dev->field_out == V4L2_FIELD_ALTERNATE) - denominator *= 2; - - /* Calculate the number of jiffies since we started streaming */ - jiffies_since_start = cur_jiffies - dev->jiffies_vid_out; - /* Get the number of buffers streamed since the start */ - buffers_since_start = (u64)jiffies_since_start * denominator + - (HZ * numerator) / 2; - do_div(buffers_since_start, HZ * numerator); - - /* - * After more than 0xf0000000 (rounded down to a multiple of - * 'jiffies-per-day' to ease jiffies_to_msecs calculation) - * jiffies have passed since we started streaming reset the - * counters and keep track of the sequence offset. - */ - if (jiffies_since_start > JIFFIES_RESYNC) { - dev->jiffies_vid_out = cur_jiffies; - dev->out_seq_offset = buffers_since_start; - buffers_since_start = 0; - } - dev->out_seq_count = buffers_since_start + dev->out_seq_offset; - dev->vid_out_seq_count = dev->out_seq_count - dev->vid_out_seq_start; - dev->vbi_out_seq_count = dev->out_seq_count - dev->vbi_out_seq_start; - - vivid_thread_vid_out_tick(dev); - mutex_unlock(&dev->mutex); - - /* - * Calculate the number of 'numerators' streamed since we started, - * not including the current buffer. - */ - numerators_since_start = buffers_since_start * numerator; - - /* And the number of jiffies since we started */ - jiffies_since_start = jiffies - dev->jiffies_vid_out; - - /* Increase by the 'numerator' of one buffer */ - numerators_since_start += numerator; - /* - * Calculate when that next buffer is supposed to start - * in jiffies since we started streaming. - */ - next_jiffies_since_start = numerators_since_start * HZ + - denominator / 2; - do_div(next_jiffies_since_start, denominator); - /* If it is in the past, then just schedule asap */ - if (next_jiffies_since_start < jiffies_since_start) - next_jiffies_since_start = jiffies_since_start; - - wait_jiffies = next_jiffies_since_start - jiffies_since_start; - schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1); - } - dprintk(dev, 1, "Video Output Thread End\n"); - return 0; -} - -static void vivid_grab_controls(struct vivid_dev *dev, bool grab) -{ - v4l2_ctrl_grab(dev->ctrl_has_crop_out, grab); - v4l2_ctrl_grab(dev->ctrl_has_compose_out, grab); - v4l2_ctrl_grab(dev->ctrl_has_scaler_out, grab); - v4l2_ctrl_grab(dev->ctrl_tx_mode, grab); - v4l2_ctrl_grab(dev->ctrl_tx_rgb_range, grab); -} - -int vivid_start_generating_vid_out(struct vivid_dev *dev, bool *pstreaming) -{ - dprintk(dev, 1, "%s\n", __func__); - - if (dev->kthread_vid_out) { - u32 seq_count = dev->out_seq_count + dev->seq_wrap * 128; - - if (pstreaming == &dev->vid_out_streaming) - dev->vid_out_seq_start = seq_count; - else - dev->vbi_out_seq_start = seq_count; - *pstreaming = true; - return 0; - } - - /* Resets frame counters */ - dev->jiffies_vid_out = jiffies; - dev->vid_out_seq_start = dev->seq_wrap * 128; - dev->vbi_out_seq_start = dev->seq_wrap * 128; - - dev->kthread_vid_out = kthread_run(vivid_thread_vid_out, dev, - "%s-vid-out", dev->v4l2_dev.name); - - if (IS_ERR(dev->kthread_vid_out)) { - v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n"); - return PTR_ERR(dev->kthread_vid_out); - } - *pstreaming = true; - vivid_grab_controls(dev, true); - - dprintk(dev, 1, "returning from %s\n", __func__); - return 0; -} - -void vivid_stop_generating_vid_out(struct vivid_dev *dev, bool *pstreaming) -{ - dprintk(dev, 1, "%s\n", __func__); - - if (dev->kthread_vid_out == NULL) - return; - - *pstreaming = false; - if (pstreaming == &dev->vid_out_streaming) { - /* Release all active buffers */ - while (!list_empty(&dev->vid_out_active)) { - struct vivid_buffer *buf; - - buf = list_entry(dev->vid_out_active.next, - struct vivid_buffer, list); - list_del(&buf->list); - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); - dprintk(dev, 2, "vid_out buffer %d done\n", - buf->vb.vb2_buf.index); - } - } - - if (pstreaming == &dev->vbi_out_streaming) { - while (!list_empty(&dev->vbi_out_active)) { - struct vivid_buffer *buf; - - buf = list_entry(dev->vbi_out_active.next, - struct vivid_buffer, list); - list_del(&buf->list); - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); - dprintk(dev, 2, "vbi_out buffer %d done\n", - buf->vb.vb2_buf.index); - } - } - - if (dev->vid_out_streaming || dev->vbi_out_streaming) - return; - - /* shutdown control thread */ - vivid_grab_controls(dev, false); - mutex_unlock(&dev->mutex); - kthread_stop(dev->kthread_vid_out); - dev->kthread_vid_out = NULL; - mutex_lock(&dev->mutex); -} |