[PATCH] vivid: fix gain when autogain is on

[Hans Verkuil]

In the vivid driver you want gain to continuous change while autogain
is on. However, dev->jiffies_vid_cap doesn't actually change. It probably
did in the past, but changes in the code caused this to be a fixed value
that is only set when you start streaming.

Replace it by jiffies, which is always changing.

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
diff --git a/drivers/media/platform/vivid/vivid-ctrls.c 
b/drivers/media/platform/vivid/vivid-ctrls.c
index 6b0bfa091592..6eb8ad7fb12c 100644
--- a/drivers/media/platform/vivid/vivid-ctrls.c
+++ b/drivers/media/platform/vivid/vivid-ctrls.c
@@ -295,7 +295,7 @@ static int vivid_user_vid_g_volatile_ctrl(struct v4l2_ctrl 
*ctrl)

        switch (ctrl->id) {
        case V4L2_CID_AUTOGAIN:
-               dev->gain->val = dev->jiffies_vid_cap & 0xff;
+               dev->gain->val = (jiffies / HZ) & 0xff;
                break;
        }
        return 0;