media: si2165: Use constellation from property cache instead of hardcoded QAM256

Use constellation from property cache instead of always setting it to
QAM256.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/dvb-frontends/si2165.c

@@ -805,13 +805,11 @@ static const struct si2165_reg_value_pair dvbc_regs[] = {
 	{ REG_KP_LOCK, 0x05 },
 	{ REG_CENTRAL_TAP, 0x09 },
 	REG16(REG_UNKNOWN_350, 0x3e80),
-	{ REG_REQ_CONSTELLATION, 0x00 },
 
 	{ REG_AUTO_RESET, 0x01 },
 	REG16(REG_UNKNOWN_24C, 0x0000),
 	REG16(REG_UNKNOWN_27C, 0x0000),
 	{ REG_SWEEP_STEP, 0x03 },
-	{ REG_REQ_CONSTELLATION, 0x0b },
 	{ REG_AGC_IF_TRI, 0x00 },
 };
 
@@ -821,6 +819,7 @@ static int si2165_set_frontend_dvbc(struct dvb_frontend *fe)
 	int ret;
 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 	const u32 dvb_rate = p->symbol_rate;
+	u8 u8tmp;
 
 	if (!state->has_dvbc)
 		return -EINVAL;
@@ -837,6 +836,31 @@ static int si2165_set_frontend_dvbc(struct dvb_frontend *fe)
 	if (ret < 0)
 		return ret;
 
+	switch (p->modulation) {
+	case QPSK:
+		u8tmp = 0x3;
+		break;
+	case QAM_16:
+		u8tmp = 0x7;
+		break;
+	case QAM_32:
+		u8tmp = 0x8;
+		break;
+	case QAM_64:
+		u8tmp = 0x9;
+		break;
+	case QAM_128:
+		u8tmp = 0xa;
+		break;
+	case QAM_256:
+	default:
+		u8tmp = 0xb;
+		break;
+	}
+	ret = si2165_writereg8(state, REG_REQ_CONSTELLATION, u8tmp);
+	if (ret < 0)
+		return ret;
+
 	ret = si2165_writereg32(state, REG_LOCK_TIMEOUT, 0x007a1200);
 	if (ret < 0)
 		return ret;
@@ -952,7 +976,6 @@ static const struct dvb_frontend_ops si2165_ops = {
 			FE_CAN_QAM_64 |
 			FE_CAN_QAM_128 |
 			FE_CAN_QAM_256 |
-			FE_CAN_QAM_AUTO |
 			FE_CAN_GUARD_INTERVAL_AUTO |
 			FE_CAN_HIERARCHY_AUTO |
 			FE_CAN_MUTE_TS |