[media] cxd2820r: check bandwidth earlier for DVB-T/T2

It is param that could be potentially unsupported and
due to that it is good idea to check it very first.

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

drivers/media/dvb/frontends/cxd2820r_t.c

@@ -26,7 +26,7 @@ int cxd2820r_set_frontend_t(struct dvb_frontend *fe,
 {
 	struct cxd2820r_priv *priv = fe->demodulator_priv;
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
-	int ret, i;
+	int ret, i, bw_i;
 	u32 if_freq, if_ctl;
 	u64 num;
 	u8 buf[3], bw_param;
@@ -57,6 +57,23 @@ int cxd2820r_set_frontend_t(struct dvb_frontend *fe,
 
 	dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
 
+	switch (c->bandwidth_hz) {
+	case 6000000:
+		bw_i = 0;
+		bw_param = 2;
+		break;
+	case 7000000:
+		bw_i = 1;
+		bw_param = 1;
+		break;
+	case 8000000:
+		bw_i = 2;
+		bw_param = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
 	/* update GPIOs */
 	ret = cxd2820r_gpio(fe);
 	if (ret)
@@ -78,23 +95,6 @@ int cxd2820r_set_frontend_t(struct dvb_frontend *fe,
 	priv->delivery_system = SYS_DVBT;
 	priv->ber_running = 0; /* tune stops BER counter */
 
-	switch (c->bandwidth_hz) {
-	case 6000000:
-		i = 0;
-		bw_param = 2;
-		break;
-	case 7000000:
-		i = 1;
-		bw_param = 1;
-		break;
-	case 8000000:
-		i = 2;
-		bw_param = 0;
-		break;
-	default:
-		return -EINVAL;
-	}
-
 	/* program IF frequency */
 	if (fe->ops.tuner_ops.get_if_frequency) {
 		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
@@ -116,15 +116,15 @@ int cxd2820r_set_frontend_t(struct dvb_frontend *fe,
 	if (ret)
 		goto error;
 
-	ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[i], 5);
+	ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[bw_i], 5);
 	if (ret)
 		goto error;
 
 	ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
 	if (ret)
 		goto error;
 
-	ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[i], 2);
+	ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[bw_i], 2);
 	if (ret)
 		goto error;
 

drivers/media/dvb/frontends/cxd2820r_t2.c

@@ -26,7 +26,7 @@ int cxd2820r_set_frontend_t2(struct dvb_frontend *fe,
 {
 	struct cxd2820r_priv *priv = fe->demodulator_priv;
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
-	int ret, i;
+	int ret, i, bw_i;
 	u32 if_freq, if_ctl;
 	u64 num;
 	u8 buf[3], bw_param;
@@ -71,6 +71,27 @@ int cxd2820r_set_frontend_t2(struct dvb_frontend *fe,
 
 	dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
 
+	switch (c->bandwidth_hz) {
+	case 5000000:
+		bw_i = 0;
+		bw_param = 3;
+		break;
+	case 6000000:
+		bw_i = 1;
+		bw_param = 2;
+		break;
+	case 7000000:
+		bw_i = 2;
+		bw_param = 1;
+		break;
+	case 8000000:
+		bw_i = 3;
+		bw_param = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
 	/* update GPIOs */
 	ret = cxd2820r_gpio(fe);
 	if (ret)
@@ -91,27 +112,6 @@ int cxd2820r_set_frontend_t2(struct dvb_frontend *fe,
 
 	priv->delivery_system = SYS_DVBT2;
 
-	switch (c->bandwidth_hz) {
-	case 5000000:
-		i = 0;
-		bw_param = 3;
-		break;
-	case 6000000:
-		i = 1;
-		bw_param = 2;
-		break;
-	case 7000000:
-		i = 2;
-		bw_param = 1;
-		break;
-	case 8000000:
-		i = 3;
-		bw_param = 0;
-		break;
-	default:
-		return -EINVAL;
-	}
-
 	/* program IF frequency */
 	if (fe->ops.tuner_ops.get_if_frequency) {
 		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
@@ -133,7 +133,7 @@ int cxd2820r_set_frontend_t2(struct dvb_frontend *fe,
 	if (ret)
 		goto error;
 
-	ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[i], 5);
+	ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[bw_i], 5);
 	if (ret)
 		goto error;