diff options
Diffstat (limited to 'drivers/media/i2c/video-i2c.c')
| -rw-r--r-- | drivers/media/i2c/video-i2c.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/media/i2c/video-i2c.c b/drivers/media/i2c/video-i2c.c index de12f38f347c..cb660b4bfd4b 100644 --- a/drivers/media/i2c/video-i2c.c +++ b/drivers/media/i2c/video-i2c.c @@ -441,14 +441,15 @@ static void buffer_queue(struct vb2_buffer *vb) static int video_i2c_thread_vid_cap(void *priv) { struct video_i2c_data *data = priv; - unsigned int delay = mult_frac(HZ, data->frame_interval.numerator, - data->frame_interval.denominator); + u32 delay = mult_frac(1000000UL, data->frame_interval.numerator, + data->frame_interval.denominator); + s64 end_us = ktime_to_us(ktime_get()); set_freezable(); do { - unsigned long start_jiffies = jiffies; struct video_i2c_buffer *vid_cap_buf = NULL; + s64 current_us; int schedule_delay; try_to_freeze(); @@ -475,12 +476,14 @@ static int video_i2c_thread_vid_cap(void *priv) VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); } - schedule_delay = delay - (jiffies - start_jiffies); - - if (time_after(jiffies, start_jiffies + delay)) - schedule_delay = delay; - - schedule_timeout_interruptible(schedule_delay); + end_us += delay; + current_us = ktime_to_us(ktime_get()); + if (current_us < end_us) { + schedule_delay = end_us - current_us; + usleep_range(schedule_delay * 3 / 4, schedule_delay); + } else { + end_us = current_us; + } } while (!kthread_should_stop()); return 0; |