[RFC,5/6] media: em28xx-video - implement em28xx_ops: suspend/resume hooks

Commit Message

Shuah Khan Feb. 22, 2014, 12:50 a.m. UTC

Implement em28xx_ops: suspend/resume hooks. em28xx usb driver will
invoke em28xx_ops: suspend and resume hooks for all its extensions
from its suspend() and resume() interfaces.

Signed-off-by: Shuah Khan <[e-mail]>
---
 drivers/media/usb/em28xx/em28xx-video.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

Patch

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index c3c9289..1df6750 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1933,6 +1933,32 @@  static int em28xx_v4l2_fini(struct em28xx *dev)
 	return 0;
 }
 
+static int em28xx_v4l2_suspend(struct em28xx *dev)
+{
+	if (dev->is_audio_only)
+		return 0;
+
+	if (!dev->has_video)
+		return 0;
+
+	em28xx_info("Suspending video extension");
+	em28xx_stop_urbs(dev);
+	return 0;
+}
+
+static int em28xx_v4l2_resume(struct em28xx *dev)
+{
+	if (dev->is_audio_only)
+		return 0;
+
+	if (!dev->has_video)
+		return 0;
+
+	em28xx_info("Resuming video extension");
+	/* what do we do here */
+	return 0;
+}
+
 /*
  * em28xx_v4l2_close()
  * stops streaming and deallocates all resources allocated by the v4l2
@@ -2504,6 +2530,8 @@  static struct em28xx_ops v4l2_ops = {
 	.name = "Em28xx v4l2 Extension",
 	.init = em28xx_v4l2_init,
 	.fini = em28xx_v4l2_fini,
+	.suspend = em28xx_v4l2_suspend,
+	.resume = em28xx_v4l2_resume,
 };
 
 static int __init em28xx_video_register(void)