From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Sat, 2 Mar 2013 16:45:31 +0000 (-0300)
Subject: [media] mb86a20s: Always reset the frontend with set_frontend
X-Git-Tag: firefly_0821_release~3680^2~618^2~643
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a78b41d5fd9a04037c7b29e59c7319035a54a150;p=firefly-linux-kernel-4.4.55.git

[media] mb86a20s: Always reset the frontend with set_frontend

Always init the frontend when set_frontend is called. The rationale
is: it was noticed that, on some devices, it fails to lock with a
different channel. It seems that some other registers need to be
restored to its initial state, when the channel changes.
As it is better to reset everything, even wasting a few more
miliseconds than to loose channel lock, let's change the logic
to always reset.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/dvb-frontends/mb86a20s.c b/drivers/media/dvb-frontends/mb86a20s.c
index 68a88180b631..b6cdc444fb45 100644
--- a/drivers/media/dvb-frontends/mb86a20s.c
+++ b/drivers/media/dvb-frontends/mb86a20s.c
@@ -1854,18 +1854,9 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	fe->ops.tuner_ops.set_params(fe);
 
-	if (fe->ops.tuner_ops.get_if_frequency) {
+	if (fe->ops.tuner_ops.get_if_frequency)
 		fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
 
-		/*
-		 * If the IF frequency changed, re-initialize the
-		 * frontend. This is needed by some drivers like tda18271,
-		 * that only sets the IF after receiving a set_params() call
-		 */
-		if (if_freq != state->if_freq)
-			state->need_init = true;
-	}
-
 	/*
 	 * Make it more reliable: if, for some reason, the initial
 	 * device initialization doesn't happen, initialize it when
@@ -1877,9 +1868,13 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe)
 	 * So, this hack is needed, in order to make Kworld SBTVD to work.
 	 *
 	 * It is also needed to change the IF after the initial init.
+	 *
+	 * HACK: Always init the frontend when set_frontend is called:
+	 * it was noticed that, on some devices, it fails to lock on a
+	 * different channel. So, it is better to reset everything, even
+	 * wasting some time, than to loose channel lock.
 	 */
-	if (state->need_init)
-		mb86a20s_initfe(fe);
+	mb86a20s_initfe(fe);
 
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);