diff options
| author | Liu Ying <Ying.Liu@freescale.com> | 2012-08-10 18:08:42 +0800 |
|---|---|---|
| committer | Liu Ying <Ying.Liu@freescale.com> | 2012-08-15 18:00:43 +0800 |
| commit | 874198b89a89aa6e792754a0a51c46084ed93d1a (patch) | |
| tree | 5d1377730a09c0c768cfc550e8c5b5b11c1c3da2 /drivers | |
| parent | 6bf2db8e8af7c98115db989e3f7a4164c4cd448c (diff) | |
ENGR00219859 MXC V4L2 capture:Pwr down/on opened cam
Currently, we support 2 cameras, which are relevant to
2 video devices respectively. This patch checks if video
device is opened to determine whether we need to power
down/on relevant camera when doing suspend/resume.
Also, this patch protects capture resources with busy
lock semaphore.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/mxc/capture/mxc_v4l2_capture.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/media/video/mxc/capture/mxc_v4l2_capture.c b/drivers/media/video/mxc/capture/mxc_v4l2_capture.c index 9e9bcc314ca5..bddfee530274 100644 --- a/drivers/media/video/mxc/capture/mxc_v4l2_capture.c +++ b/drivers/media/video/mxc/capture/mxc_v4l2_capture.c @@ -1744,6 +1744,8 @@ static int mxc_v4l_close(struct file *file) return -EBADF; } + down(&cam->busy_lock); + /* for the case somebody hit the ctrl C */ if (cam->overlay_pid == current->pid && cam->overlay_on) { err = stop_preview(cam); @@ -1785,6 +1787,8 @@ static int mxc_v4l_close(struct file *file) cam->enc_counter++; } + up(&cam->busy_lock); + return err; } @@ -2828,6 +2832,8 @@ static int mxc_v4l2_suspend(struct platform_device *pdev, pm_message_t state) return -1; } + down(&cam->busy_lock); + cam->low_power = true; if (cam->overlay_on == true) @@ -2836,9 +2842,11 @@ static int mxc_v4l2_suspend(struct platform_device *pdev, pm_message_t state) cam->enc_disable(cam); } - if (cam->sensor) + if (cam->sensor && cam->open_count) vidioc_int_s_power(cam->sensor, 0); + up(&cam->busy_lock); + return 0; } @@ -2861,10 +2869,12 @@ static int mxc_v4l2_resume(struct platform_device *pdev) return -1; } + down(&cam->busy_lock); + cam->low_power = false; wake_up_interruptible(&cam->power_queue); - if (cam->sensor) + if (cam->sensor && cam->open_count) vidioc_int_s_power(cam->sensor, 1); if (cam->overlay_on == true) @@ -2872,6 +2882,8 @@ static int mxc_v4l2_resume(struct platform_device *pdev) if (cam->capture_on == true) mxc_streamon(cam); + up(&cam->busy_lock); + return 0; } |