V4L/DVB (12864): tda18271: change output feature configuration to a bitmask

For better readability, treat the low power standby mode configuration
as an output option feature configuration, and change it to a bitmask.

If left unconfigured, all features will remain enabled, just as the
default configuration was before these changes were introduced.
Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/tuners/tda18271-fe.c

@@ -36,6 +36,27 @@ static LIST_HEAD(hybrid_tuner_instance_list);
 
 /*---------------------------------------------------------------------*/
 
+static int tda18271_toggle_output(struct dvb_frontend *fe, int standby)
+{
+	struct tda18271_priv *priv = fe->tuner_priv;
+
+	int ret = tda18271_set_standby_mode(fe, standby ? 1 : 0,
+			priv->output_opt & TDA18271_OUTPUT_LT_OFF ? 1 : 0,
+			priv->output_opt & TDA18271_OUTPUT_XT_OFF ? 1 : 0);
+
+	if (tda_fail(ret))
+		goto fail;
+
+	tda_dbg("%s mode: xtal oscillator %s, slave tuner loop thru %s\n",
+		standby ? "standby" : "active",
+		priv->output_opt & TDA18271_OUTPUT_XT_OFF ? "off" : "on",
+		priv->output_opt & TDA18271_OUTPUT_LT_OFF ? "off" : "on");
+fail:
+	return ret;
+}
+
+/*---------------------------------------------------------------------*/
+
 static inline int charge_pump_source(struct dvb_frontend *fe, int force)
 {
 	struct tda18271_priv *priv = fe->tuner_priv;
@@ -800,7 +821,7 @@ static int tda18271_init(struct dvb_frontend *fe)
 
 	mutex_lock(&priv->lock);
 
-	/* power up */
+	/* full power up */
 	ret = tda18271_set_standby_mode(fe, 0, 0, 0);
 	if (tda_fail(ret))
 		goto fail;
@@ -1017,24 +1038,8 @@ static int tda18271_sleep(struct dvb_frontend *fe)
 
 	mutex_lock(&priv->lock);
 
-	switch (priv->standby_mode) {
-	case TDA18271_STANDBY_POWER_OFF:
-		tda_dbg("standby mode: power off\n");
-		ret = tda18271_set_standby_mode(fe, 1, 1, 1);
-		break;
-	case TDA18271_STANDBY_XT_ON:
-		tda_dbg("standby mode: xtal oscillator on\n");
-		ret = tda18271_set_standby_mode(fe, 1, 1, 0);
-		break;
-	case TDA18271_STANDBY_LT_ON:
-		tda_dbg("standby mode: slave tuner output / loop thru on\n");
-		ret = tda18271_set_standby_mode(fe, 1, 0, 1);
-		break;
-	case TDA18271_STANDBY_LT_XT_ON:
-	default:
-		tda_dbg("standby mode: loop thru & xtal oscillator on\n");
-		ret = tda18271_set_standby_mode(fe, 1, 0, 0);
-	}
+	/* enter standby mode, with required output features enabled */
+	ret = tda18271_toggle_output(fe, 1);
 
 	mutex_unlock(&priv->lock);
 
@@ -1214,8 +1219,8 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
 		priv->gate = (cfg) ? cfg->gate : TDA18271_GATE_AUTO;
 		priv->role = (cfg) ? cfg->role : TDA18271_MASTER;
 		priv->config = (cfg) ? cfg->config : 0;
-		priv->standby_mode = (cfg) ?
-			cfg->standby_mode : TDA18271_STANDBY_LT_XT_ON;
+		priv->output_opt = (cfg) ?
+			cfg->output_opt : TDA18271_OUTPUT_LT_XT_ON;
 
 		/* tda18271_cal_on_startup == -1 when cal
 		 * module option is unset */

drivers/media/common/tuners/tda18271-priv.h

@@ -108,7 +108,7 @@ struct tda18271_priv {
 	enum tda18271_role role;
 	enum tda18271_i2c_gate gate;
 	enum tda18271_ver id;
-	enum tda18271_standby_mode standby_mode;
+	enum tda18271_output_options output_opt;
 
 	unsigned int config; /* interface to saa713x / tda829x */
 	unsigned int tm_rfcal;

drivers/media/common/tuners/tda18271.h

@@ -67,18 +67,15 @@ enum tda18271_i2c_gate {
 	TDA18271_GATE_DIGITAL,
 };
 
-enum tda18271_standby_mode {
-	/* slave tuner output & loop thru & xtal oscillator on */
-	TDA18271_STANDBY_LT_XT_ON = 0,
+enum tda18271_output_options {
+	/* slave tuner output & loop thru & xtal oscillator always on */
+	TDA18271_OUTPUT_LT_XT_ON = 0,
 
-	/* xtal oscillator on */
-	TDA18271_STANDBY_XT_ON,
+	/* slave tuner output loop thru off */
+	TDA18271_OUTPUT_LT_OFF = 1,
 
-	/* slave tuner output / loop thru on */
-	TDA18271_STANDBY_LT_ON,
-
-	/* power off */
-	TDA18271_STANDBY_POWER_OFF,
+	/* xtal oscillator off */
+	TDA18271_OUTPUT_XT_OFF = 2,
 };
 
 struct tda18271_config {
@@ -91,8 +88,8 @@ struct tda18271_config {
 	/* use i2c gate provided by analog or digital demod */
 	enum tda18271_i2c_gate gate;
 
-	/* allow lower power standby modes */
-	enum tda18271_standby_mode standby_mode;
+	/* output options that can be disabled */
+	enum tda18271_output_options output_opt;
 
 	/* force rf tracking filter calibration on startup */
 	unsigned int rf_cal_on_startup:1;