void bcm_timer_start(bcm_timer_t *t, unsigned long period_in_msecs)
{
bcm_pr_debug("bcm_timer_start()\n");
bcm_timer_stop(t);
bcm_timer_compute_params(t, period_in_msecs * 1000);
t->is_active = true;
#ifdef __KERNEL__
t->kobject.expires = jiffies + t->period_in_jiffies;
#else // !__KERNEL__
t->kobject.expires = get_jiffies() + t->period_in_jiffies;
#endif // !__KERNEL__
t->drift = 0;
add_timer(&(t->kobject));
}
void bcm_timer_reschedule(bcm_timer_t *t)
{
unsigned long period_in_jiffies = t->period_in_jiffies;
unsigned long soon;
if (bcm_timer_is_active(t)) {
// We compute next expires
t->drift += t->drift_increment;
if (t->drift >= one_jiffie_to_usecs) {
period_in_jiffies -= 1;
t->drift -= one_jiffie_to_usecs;
}
// Now we test that timer will not expire too soon
t->kobject.expires += period_in_jiffies;
#ifdef __KERNEL__
soon = jiffies + 1;
#else // !__KERNEL__
soon = get_jiffies() + 1;
#endif // !__KERNEL__
if (time_before(t->kobject.expires, soon)) {
#ifdef BCMPH_DEBUG
d_bcm_pr_debug("too soon %lu\n", (unsigned long)(t->stats.count));
t->stats.too_soon += 1;
#endif // BCMPH_DEBUG
t->drift += (((long)(soon) - (long)(t->kobject.expires)) * one_jiffie_to_usecs);
if (t->drift > TIMER_MAX_DRIFT) {
#ifdef BCMPH_DEBUG
d_bcm_pr_debug("reset drift %lu\n", (unsigned long)(t->stats.count));
t->stats.reset_drift += 1;
#endif // BCMPH_DEBUG
t->drift = 0;
}
t->kobject.expires = soon;
}
add_timer(&(t->kobject));
}
}
/*!
* V4L2 interface - ioctl function
*
* @param inode struct inode *
*
* @param file struct file *
*
* @param ioctlnr unsigned int
*
* @param arg void *
*
* @return 0 success, ENODEV for invalid device instance,
* -1 for other errors.
*/
static int
mxc_v4l2out_do_ioctl(struct inode *inode, struct file *file,
unsigned int ioctlnr, void *arg)
{
struct video_device *dev = file->private_data;
vout_data *vout = video_get_drvdata(dev);
int retval = 0;
int i = 0;
if (!vout)
return -EBADF;
/* make this _really_ smp-safe */
if (down_interruptible(&vout->busy_lock))
return -EBUSY;
switch (ioctlnr) {
case VIDIOC_QUERYCAP:
{
struct v4l2_capability *cap = arg;
strcpy(cap->driver, "mxc_v4l2_output");
cap->version = 0;
cap->capabilities =
V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
cap->card[0] = '\0';
cap->bus_info[0] = '\0';
retval = 0;
break;
}
case VIDIOC_G_FMT:
{
struct v4l2_format *gf = arg;
retval = mxc_v4l2out_g_fmt(vout, gf);
break;
}
case VIDIOC_S_FMT:
{
struct v4l2_format *sf = arg;
if (vout->state != STATE_STREAM_OFF) {
retval = -EBUSY;
break;
}
retval = mxc_v4l2out_s_fmt(vout, sf);
break;
}
case VIDIOC_REQBUFS:
{
struct v4l2_requestbuffers *req = arg;
if ((req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) ||
(req->memory != V4L2_MEMORY_MMAP)) {
pr_debug
("VIDIOC_REQBUFS: incorrect buffer type\n");
retval = -EINVAL;
break;
}
if (req->count == 0)
mxc_v4l2out_streamoff(vout);
if (vout->state == STATE_STREAM_OFF) {
if (vout->queue_buf_paddr[0] != 0) {
mxc_free_buffers(vout->queue_buf_paddr,
vout->queue_buf_vaddr,
vout->buffer_cnt,
vout->queue_buf_size);
pr_debug
("VIDIOC_REQBUFS: freed buffers\n");
}
vout->buffer_cnt = 0;
} else {
pr_debug("VIDIOC_REQBUFS: Buffer is in use\n");
retval = -EBUSY;
break;
}
if (req->count == 0)
break;
if (req->count < MIN_FRAME_NUM) {
req->count = MIN_FRAME_NUM;
} else if (req->count > MAX_FRAME_NUM) {
req->count = MAX_FRAME_NUM;
}
vout->buffer_cnt = req->count;
vout->queue_buf_size =
PAGE_ALIGN(vout->v2f.fmt.pix.sizeimage);
retval = mxc_allocate_buffers(vout->queue_buf_paddr,
vout->queue_buf_vaddr,
vout->buffer_cnt,
vout->queue_buf_size);
if (retval < 0)
break;
/* Init buffer queues */
vout->done_q.head = 0;
vout->done_q.tail = 0;
vout->ready_q.head = 0;
vout->ready_q.tail = 0;
for (i = 0; i < vout->buffer_cnt; i++) {
memset(&(vout->v4l2_bufs[i]), 0,
sizeof(vout->v4l2_bufs[i]));
vout->v4l2_bufs[i].flags = 0;
vout->v4l2_bufs[i].memory = V4L2_MEMORY_MMAP;
vout->v4l2_bufs[i].index = i;
vout->v4l2_bufs[i].type =
V4L2_BUF_TYPE_VIDEO_OUTPUT;
vout->v4l2_bufs[i].length =
PAGE_ALIGN(vout->v2f.fmt.pix.sizeimage);
vout->v4l2_bufs[i].m.offset =
(unsigned long)vout->queue_buf_paddr[i];
vout->v4l2_bufs[i].timestamp.tv_sec = 0;
vout->v4l2_bufs[i].timestamp.tv_usec = 0;
}
break;
}
case VIDIOC_QUERYBUF:
{
struct v4l2_buffer *buf = arg;
u32 type = buf->type;
int index = buf->index;
if ((type != V4L2_BUF_TYPE_VIDEO_OUTPUT) ||
(index >= vout->buffer_cnt)) {
pr_debug
("VIDIOC_QUERYBUFS: incorrect buffer type\n");
retval = -EINVAL;
break;
}
down(&vout->param_lock);
memcpy(buf, &(vout->v4l2_bufs[index]), sizeof(*buf));
up(&vout->param_lock);
break;
}
case VIDIOC_QBUF:
{
struct v4l2_buffer *buf = arg;
int index = buf->index;
unsigned long lock_flags;
unsigned long timeout;
if ((buf->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) ||
(index >= vout->buffer_cnt) || (buf->flags != 0)) {
retval = -EINVAL;
break;
}
pr_debug("VIDIOC_QBUF: %d\n", buf->index);
spin_lock_irqsave(&g_lock, lock_flags);
memcpy(&(vout->v4l2_bufs[index]), buf, sizeof(*buf));
vout->v4l2_bufs[index].flags |= V4L2_BUF_FLAG_QUEUED;
g_buf_q_cnt++;
queue_buf(&vout->ready_q, index);
if (vout->state == STATE_STREAM_PAUSED) {
index = peek_next_buf(&vout->ready_q);
/* if timestamp is 0, then default to 30fps */
if ((vout->v4l2_bufs[index].timestamp.tv_sec ==
0)
&& (vout->v4l2_bufs[index].timestamp.
tv_usec == 0))
timeout =
vout->start_jiffies +
vout->frame_count * HZ / 30;
else
timeout =
get_jiffies(&vout->v4l2_bufs[index].
timestamp);
if (jiffies >= timeout) {
pr_debug
("warning: timer timeout already expired.\n");
}
vout->output_timer.expires = timeout;
pr_debug
("QBUF:Add timer %d timeout @ %lu jiffies, "
"current = %lu\n", index, timeout,
jiffies);
add_timer(&vout->output_timer);
vout->state = STATE_STREAM_ON;
}
spin_unlock_irqrestore(&g_lock, lock_flags);
break;
}
case VIDIOC_DQBUF:
{
struct v4l2_buffer *buf = arg;
int idx;
pr_debug("VIDIOC_DQBUF: q size = %d\n",
queue_size(&vout->done_q));
if ((queue_size(&vout->done_q) == 0) &&
(file->f_flags & O_NONBLOCK)) {
retval = -EAGAIN;
break;
}
if (!wait_event_interruptible_timeout(vout->v4l_bufq,
queue_size(&vout->
done_q)
!= 0, 10 * HZ)) {
pr_debug("VIDIOC_DQBUF: timeout\n");
retval = -ETIME;
break;
} else if (signal_pending(current)) {
if(dq_intr_cnt == 0)
pr_debug("VIDIOC_DQBUF: interrupt received\n");
dq_intr_cnt++;
retval = -ERESTARTSYS;
break;
}
idx = dequeue_buf(&vout->done_q);
if (idx == -1) { /* No frame free */
pr_debug
("VIDIOC_DQBUF: no free buffers, returning\n");
retval = -EAGAIN;
break;
}
if ((vout->v4l2_bufs[idx].flags & V4L2_BUF_FLAG_DONE) ==
0)
pr_debug
("VIDIOC_DQBUF: buffer in done q, but not "
"flagged as done\n");
vout->v4l2_bufs[idx].flags = 0;
memcpy(buf, &(vout->v4l2_bufs[idx]), sizeof(*buf));
pr_debug("VIDIOC_DQBUF: %d\n", buf->index);
break;
}
case VIDIOC_STREAMON:
{
retval = mxc_v4l2out_streamon(vout);
break;
}
case VIDIOC_STREAMOFF:
{
retval = mxc_v4l2out_streamoff(vout);
break;
}
case VIDIOC_G_CTRL:
{
retval = mxc_get_v42lout_control(vout, arg);
break;
}
case VIDIOC_S_CTRL:
{
retval = mxc_set_v42lout_control(vout, arg);
break;
}
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *cap = arg;
if (cap->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
retval = -EINVAL;
break;
}
cap->bounds = vout->crop_bounds[vout->cur_disp_output];
cap->defrect = vout->crop_bounds[vout->cur_disp_output];
retval = 0;
break;
}
case VIDIOC_G_CROP:
{
struct v4l2_crop *crop = arg;
if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
retval = -EINVAL;
break;
}
crop->c = vout->crop_current;
break;
}
case VIDIOC_S_CROP:
{
struct v4l2_crop *crop = arg;
struct v4l2_rect *b =
&(vout->crop_bounds[vout->cur_disp_output]);
if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
retval = -EINVAL;
break;
}
if (crop->c.height < 0) {
retval = -EINVAL;
break;
}
if (crop->c.width < 0) {
retval = -EINVAL;
break;
}
if (crop->c.top < b->top)
crop->c.top = b->top;
if (crop->c.top > b->top + b->height)
crop->c.top = b->top + b->height;
if (crop->c.height > b->top - crop->c.top + b->height)
crop->c.height =
b->top - crop->c.top + b->height;
if (crop->c.left < b->left)
crop->c.top = b->left;
if (crop->c.left > b->left + b->width)
crop->c.top = b->left + b->width;
if (crop->c.width > b->left - crop->c.left + b->width)
crop->c.width =
b->left - crop->c.left + b->width;
/* stride line limitation */
crop->c.height -= crop->c.height % 8;
crop->c.width -= crop->c.width % 8;
vout->crop_current = crop->c;
vout->sdc_fg_buf_size = vout->crop_current.width *
vout->crop_current.height;
vout->sdc_fg_buf_size *=
fmt_to_bpp(SDC_FG_FB_FORMAT) / 8;
break;
}
case VIDIOC_ENUMOUTPUT:
{
struct v4l2_output *output = arg;
if ((output->index >= 2) ||
(vout->output_enabled[output->index] == false)) {
retval = -EINVAL;
break;
}
*output = mxc_outputs[0];
output->name[4] = '0' + output->index;
break;
}
case VIDIOC_G_OUTPUT:
{
int *p_output_num = arg;
*p_output_num = vout->cur_disp_output;
break;
}
case VIDIOC_S_OUTPUT:
{
int *p_output_num = arg;
if ((*p_output_num >= 2) ||
(vout->output_enabled[*p_output_num] == false)) {
retval = -EINVAL;
break;
}
if (vout->state != STATE_STREAM_OFF) {
retval = -EBUSY;
break;
}
vout->cur_disp_output = *p_output_num;
break;
}
case VIDIOC_G_FBUF:
{
struct v4l2_framebuffer *fb = arg;
*fb = vout->v4l2_fb;
break;
}
case VIDIOC_S_FBUF:
{
struct v4l2_framebuffer *fb = arg;
vout->v4l2_fb = *fb;
vout->v4l2_fb.capability = V4L2_FBUF_CAP_EXTERNOVERLAY;
break;
}
case VIDIOC_ENUM_FMT:
case VIDIOC_TRY_FMT:
case VIDIOC_QUERYCTRL:
case VIDIOC_G_PARM:
case VIDIOC_ENUMSTD:
case VIDIOC_G_STD:
case VIDIOC_S_STD:
case VIDIOC_G_TUNER:
case VIDIOC_S_TUNER:
case VIDIOC_G_FREQUENCY:
case VIDIOC_S_FREQUENCY:
default:
retval = -EINVAL;
break;
}
up(&vout->busy_lock);
return retval;
}
/*!
* Start the output stream
*
* @param vout structure vout_data *
*
* @return status 0 Success
*/
static int mxc_v4l2out_streamon(vout_data * vout)
{
unsigned long timeout;
int index;
if (!vout)
return -EINVAL;
if (vout->state != STATE_STREAM_OFF)
return -EBUSY;
if (queue_size(&vout->ready_q) < 1) {
pr_debug("no buffers queued yet!\n");
return -EINVAL;
}
vout->ipu_buf[0] = -1;
if (vout->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
/* Free previously allocated buffer */
mxc_free_buffers(vout->display_bufs, vout->display_bufs_vaddr,
2, vout->sdc_fg_buf_size);
/* Allocate buffers for foreground */
if (mxc_allocate_buffers(vout->display_bufs,
vout->display_bufs_vaddr, 2,
vout->sdc_fg_buf_size) < 0) {
pr_debug("unable to allocate SDC FG buffers\n");
return -ENOMEM;
}
}
/* Configure PP */
if (pp_cfg(vout)) {
/* Free previously allocated buffer */
mxc_free_buffers(vout->display_bufs, vout->display_bufs_vaddr,
2, vout->sdc_fg_buf_size);
pr_debug("failed to config PP.\n");
return -EINVAL;
}
#ifdef CONFIG_VIDEO_MXC_OUTPUT_FBSYNC
if (vout->tear_protection == TEARING_PROTECTION_ACTIVE) {
g_output_fb = vout->output_fb_num[vout->cur_disp_output];
g_fb_enabled = 0;
g_pp_ready = 0;
fb_register_client(&fb_event_notifier);
mx2fb_register_client(&mx2fb_event_notifier);
}
#endif
vout->frame_count = 0;
vout->state = STATE_STREAM_ON;
index = peek_next_buf(&vout->ready_q);
/* if timestamp is 0, then default to 30fps */
if ((vout->v4l2_bufs[index].timestamp.tv_sec == 0)
&& (vout->v4l2_bufs[index].timestamp.tv_usec == 0))
timeout = jiffies;
else
timeout = get_jiffies(&vout->v4l2_bufs[index].timestamp);
if (jiffies >= timeout) {
pr_debug("warning: timer timeout already expired.\n");
}
vout->start_jiffies = vout->output_timer.expires = timeout;
pr_debug("STREAMON:Add timer %d timeout @ %lu jiffies, current = %lu\n",
index, timeout, jiffies);
add_timer(&vout->output_timer);
return 0;
}
irqreturn_t mxc_v4l2out_pp_in_irq_handler(int irq, void *dev_id)
{
int last_buf;
int index;
unsigned long timeout;
unsigned long lock_flags;
vout_data *vout = dev_id;
spin_lock_irqsave(&g_lock, lock_flags);
g_irq_cnt++;
if ((vout->state == STATE_STREAM_OFF)
|| (vout->state == STATE_STREAM_STOPPING)) {
spin_unlock_irqrestore(&g_lock, lock_flags);
return IRQ_HANDLED;
}
if (vout->v4l2_fb.flags == V4L2_FBUF_FLAG_OVERLAY) {
struct fb_gwinfo gwinfo;
gwinfo.enabled = 1;
gwinfo.alpha_value = 255;
gwinfo.ck_enabled = 0;
gwinfo.xpos = vout->crop_current.left;
gwinfo.ypos = vout->crop_current.top;
gwinfo.base = (unsigned long)vout->display_bufs[pp_num_last()];
gwinfo.xres = vout->crop_current.width;
gwinfo.yres = vout->crop_current.height;
gwinfo.xres_virtual = vout->crop_current.width;
gwinfo.vs_reversed = 0;
mx2_gw_set(&gwinfo);
}
/* Process previous buffer */
last_buf = vout->ipu_buf[0];
pr_debug("last_buf %d g_irq_cnt %d\n", last_buf, g_irq_cnt);
if (last_buf != -1) {
g_buf_output_cnt++;
vout->v4l2_bufs[last_buf].flags = V4L2_BUF_FLAG_DONE;
queue_buf(&vout->done_q, last_buf);
vout->ipu_buf[0] = -1;
wake_up_interruptible(&vout->v4l_bufq);
}
/* Setup timer for next buffer, when stream has been paused */
if ((vout->state == STATE_STREAM_PAUSED)
&& ((index = peek_next_buf(&vout->ready_q)) != -1)) {
pr_debug("next index %d\n", index);
/* if timestamp is 0, then default to 30fps */
if ((vout->v4l2_bufs[index].timestamp.tv_sec == 0)
&& (vout->v4l2_bufs[index].timestamp.tv_usec == 0))
timeout =
vout->start_jiffies + vout->frame_count * HZ / 30;
else
timeout =
get_jiffies(&vout->v4l2_bufs[index].timestamp);
if (jiffies >= timeout) {
pr_debug("warning: timer timeout already expired.\n");
}
vout->state = STATE_STREAM_ON;
if (mod_timer(&vout->output_timer, timeout))
pr_debug("warning: timer was already set\n");
pr_debug("timer handler next schedule: %lu\n", timeout);
}
spin_unlock_irqrestore(&g_lock, lock_flags);
return IRQ_HANDLED;
}
static void mxc_v4l2out_timer_handler(unsigned long arg)
{
int index;
unsigned long timeout;
unsigned long lock_flags;
vout_data *vout = (vout_data *) arg;
pr_debug("timer handler: %lu\n", jiffies);
spin_lock_irqsave(&g_lock, lock_flags);
if ((vout->state == STATE_STREAM_OFF)
|| (vout->state == STATE_STREAM_STOPPING)) {
pr_debug("stream has stopped\n");
goto exit0;
}
/*
* If timer occurs before PP h/w is ready, then set the state to
* paused and the timer will be set again when next buffer is queued
* or PP completes.
*/
if (vout->ipu_buf[0] != -1) {
pr_debug("buffer is busy\n");
vout->state = STATE_STREAM_PAUSED;
goto exit0;
}
/* Dequeue buffer and pass to PP */
index = dequeue_buf(&vout->ready_q);
if (index == -1) { /* no buffers ready, should never occur */
pr_debug("mxc_v4l2out: timer - no queued buffers ready\n");
goto exit0;
}
g_buf_dq_cnt++;
vout->frame_count++;
vout->ipu_buf[0] = index;
if (pp_ptr((unsigned int)vout->queue_buf_paddr[index])) {
pr_debug("unable to update buffer\n");
goto exit0;
}
#ifdef CONFIG_VIDEO_MXC_OUTPUT_FBSYNC
if (vout->tear_protection == TEARING_PROTECTION_ACTIVE) {
if (g_fb_enabled
&& (vout->v4l2_fb.flags != V4L2_FBUF_FLAG_OVERLAY))
g_pp_ready = 1;
else if (pp_enable(1)) {
pr_debug("unable to enable PP\n");
goto exit0;
}
} else if (pp_enable(1)) {
pr_debug("unable to enable PP\n");
goto exit0;
}
#else
if (pp_enable(1)) {
pr_debug("unable to enable PP\n");
goto exit0;
}
#endif
pr_debug("enabled index %d\n", index);
/* Setup timer for next buffer */
index = peek_next_buf(&vout->ready_q);
pr_debug("next index %d\n", index);
if (index != -1) {
/* if timestamp is 0, then default to 30fps */
if ((vout->v4l2_bufs[index].timestamp.tv_sec == 0)
&& (vout->v4l2_bufs[index].timestamp.tv_usec == 0))
timeout =
vout->start_jiffies + vout->frame_count * HZ / 30;
else
timeout =
get_jiffies(&vout->v4l2_bufs[index].timestamp);
if (jiffies >= timeout) {
pr_debug("warning: timer timeout already expired.\n");
}
if (mod_timer(&vout->output_timer, timeout))
pr_debug("warning: timer was already set\n");
pr_debug("timer handler next schedule: %lu\n", timeout);
} else {
vout->state = STATE_STREAM_PAUSED;
pr_debug("timer handler paused\n");
}
exit0:
spin_unlock_irqrestore(&g_lock, lock_flags);
}