V4L/DVB (6661): Remove firmware reload hack for analog

On some cases, xc2028/xc3028 wents into "turn off" mode. It seems that this
happens when very weak signals are tuned. To solve this, specific standard
reaload were done previously. Christopher patches changed this behavior to a
complete firmware reload.

This patch removes the hack. A much cleaner solution for this trouble is just
to sent a xc2028/3028 software reset.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tuner-xc2028.c

@@ -850,16 +850,21 @@ static int generic_set_tv_freq(struct dvb_frontend *fe, u32 freq /* in Hz */ ,
 
 	mutex_lock(&priv->lock);
 
-	/* HACK: It seems that specific firmware need to be reloaded
-	   when watching analog TV and freq is changed */
-	if (new_mode != T_DIGITAL_TV)
-		priv->cur_fw.type = 0;
-
 	tuner_dbg("should set frequency %d kHz\n", freq / 1000);
 
 	if (check_firmware(fe, new_mode, std, bandwidth) < 0)
 		goto ret;
 
+	/* On some cases xc2028 can disable video output, if
+	 * very weak signals are received. By sending a soft
+	 * reset, this is re-enabled. So, it is better to always
+	 * send a soft reset before changing channels, to be sure
+	 * that xc2028 will be in a safe state.
+	 * Maybe this might also be needed for DTV.
+	 */
+	if (new_mode != T_DIGITAL_TV)
+		rc = send_seq(priv, {0x00, 0x00});
+
 	if (new_mode == T_DIGITAL_TV) {
 		offset = 2750000;
 		if (priv->cur_fw.type & DTV7)