int fimc_capture_resume(struct fimc_dev *fimc)
{
struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
struct fimc_vid_buffer *buf;
int i;
if (!test_and_clear_bit(ST_CAPT_SUSPENDED, &fimc->state))
return 0;
INIT_LIST_HEAD(&fimc->vid_cap.active_buf_q);
vid_cap->buf_index = 0;
fimc_pipeline_initialize(fimc, &fimc->vid_cap.vfd->entity,
false);
fimc_init_capture(fimc);
clear_bit(ST_CAPT_SUSPENDED, &fimc->state);
for (i = 0; i < vid_cap->reqbufs_count; i++) {
if (list_empty(&vid_cap->pending_buf_q))
break;
buf = fimc_pending_queue_pop(vid_cap);
buffer_queue(&buf->vb);
}
return 0;
}
/*
* Reinitialize the driver so it is ready to start the streaming again.
* Set fimc->state to indicate stream off and the hardware shut down state.
* If not suspending (@suspend is false), return any buffers to videobuf2.
* Otherwise put any owned buffers onto the pending buffers queue, so they
* can be re-spun when the device is being resumed. Also perform FIMC
* software reset and disable streaming on the whole pipeline if required.
*/
static int fimc_capture_state_cleanup(struct fimc_dev *fimc, bool suspend)
{
struct fimc_vid_cap *cap = &fimc->vid_cap;
struct fimc_vid_buffer *buf;
unsigned long flags;
bool streaming;
spin_lock_irqsave(&fimc->slock, flags);
streaming = fimc->state & (1 << ST_CAPT_ISP_STREAM);
fimc->state &= ~(1 << ST_CAPT_RUN | 1 << ST_CAPT_SHUT |
1 << ST_CAPT_STREAM | 1 << ST_CAPT_ISP_STREAM);
if (suspend)
fimc->state |= (1 << ST_CAPT_SUSPENDED);
else
fimc->state &= ~(1 << ST_CAPT_PEND | 1 << ST_CAPT_SUSPENDED);
/* Release unused buffers */
while (!suspend && !list_empty(&cap->pending_buf_q)) {
buf = fimc_pending_queue_pop(cap);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
/* If suspending put unused buffers onto pending queue */
while (!list_empty(&cap->active_buf_q)) {
buf = fimc_active_queue_pop(cap);
if (suspend)
fimc_pending_queue_add(cap, buf);
else
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
fimc_hw_reset(fimc);
cap->buf_index = 0;
spin_unlock_irqrestore(&fimc->slock, flags);
if (streaming)
return fimc_pipeline_call(fimc, set_stream,
&fimc->pipeline, 0);
else
return 0;
}
void fimc_capture_irq_handler(struct fimc_dev *fimc, int deq_buf)
{
struct fimc_vid_cap *cap = &fimc->vid_cap;
struct fimc_vid_buffer *v_buf;
struct timeval *tv;
struct timespec ts;
if (test_and_clear_bit(ST_CAPT_SHUT, &fimc->state)) {
wake_up(&fimc->irq_queue);
goto done;
}
if (!list_empty(&cap->active_buf_q) &&
test_bit(ST_CAPT_RUN, &fimc->state) && deq_buf) {
ktime_get_real_ts(&ts);
v_buf = fimc_active_queue_pop(cap);
tv = &v_buf->vb.v4l2_buf.timestamp;
tv->tv_sec = ts.tv_sec;
tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
v_buf->vb.v4l2_buf.sequence = cap->frame_count++;
vb2_buffer_done(&v_buf->vb, VB2_BUF_STATE_DONE);
}
if (!list_empty(&cap->pending_buf_q)) {
v_buf = fimc_pending_queue_pop(cap);
fimc_hw_set_output_addr(fimc, &v_buf->paddr, cap->buf_index);
v_buf->index = cap->buf_index;
/* Move the buffer to the capture active queue */
fimc_active_queue_add(cap, v_buf);
dbg("next frame: %d, done frame: %d",
fimc_hw_get_frame_index(fimc), v_buf->index);
if (++cap->buf_index >= FIMC_MAX_OUT_BUFS)
cap->buf_index = 0;
}
if (cap->active_buf_cnt == 0) {
if (deq_buf)
clear_bit(ST_CAPT_RUN, &fimc->state);
if (++cap->buf_index >= FIMC_MAX_OUT_BUFS)
cap->buf_index = 0;
} else {
set_bit(ST_CAPT_RUN, &fimc->state);
}
if (test_bit(ST_CAPT_APPLY_CFG, &fimc->state))
fimc_capture_config_update(cap->ctx);
done:
if (cap->active_buf_cnt == 1) {
fimc_deactivate_capture(fimc);
clear_bit(ST_CAPT_STREAM, &fimc->state);
}
dbg("frame: %d, active_buf_cnt: %d",
fimc_hw_get_frame_index(fimc), cap->active_buf_cnt);
}