[media] rtl28xxu: add small sleep for rtl2830 demod attach

Demod needs some time to wake up after power on.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/rtl28xxu.c b/drivers/media/dvb/dvb-usb/rtl28xxu.c
index 4e69e9db849e..41e1f5537f44 100644
--- a/drivers/media/dvb/dvb-usb/rtl28xxu.c
+++ b/drivers/media/dvb/dvb-usb/rtl28xxu.c
@@ -322,6 +322,9 @@ static int rtl2831u_frontend_attach(struct dvb_usb_adapter *adap)
          * since there is some demod params needed to set according to tuner.
          */
 
+        /* demod needs some time to wake up */
+        msleep(20);
+
         /* open demod I2C gate */
         ret = rtl28xxu_ctrl_msg(adap->dev, &req_gate);
         if (ret)