V4L/DVB: gspca - sonixj: Do the audio input work for webcams with a microphone

The bit 0x04 of the bridge register 02 (GPIO) is used for audio connection
in webcams containing the bridge SN9C105. This patch sets it correctly,
according to the presence of an audio device.
Tested-by: NKyle Baker <kyleabaker@gmail.com>
Signed-off-by: NJean-François Moine <moinejf@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/sonixj.c

@@ -391,7 +391,7 @@ static const u8 sn_gc0307[0x1c] = {
 
 static const u8 sn_hv7131[0x1c] = {
 /*	reg0	reg1	reg2	reg3	reg4	reg5	reg6	reg7 */
-	0x00,	0x03,	0x64,	0x00,	0x1a,	0x20,	0x20,	0x20,
+	0x00,	0x03,	0x60,	0x00,	0x1a,	0x20,	0x20,	0x20,
 /*	reg8	reg9	rega	regb	regc	regd	rege	regf */
 	0x81,	0x11,	0x00,	0x00,	0x00,	0x00,	0x00,	0x00,
 /*	reg10	reg11	reg12	reg13	reg14	reg15	reg16	reg17 */
@@ -402,7 +402,7 @@ static const u8 sn_hv7131[0x1c] = {
 
 static const u8 sn_mi0360[0x1c] = {
 /*	reg0	reg1	reg2	reg3	reg4	reg5	reg6	reg7 */
-	0x00,	0x61,	0x44,	0x00,	0x1a,	0x20,	0x20,	0x20,
+	0x00,	0x61,	0x40,	0x00,	0x1a,	0x20,	0x20,	0x20,
 /*	reg8	reg9	rega	regb	regc	regd	rege	regf */
 	0x81,	0x5d,	0x00,	0x00,	0x00,	0x00,	0x00,	0x00,
 /*	reg10	reg11	reg12	reg13	reg14	reg15	reg16	reg17 */
@@ -1643,6 +1643,7 @@ static void bridge_init(struct gspca_dev *gspca_dev,
 			  const u8 *sn9c1xx)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
+	u8 reg0102[2];
 	const u8 *reg9a;
 	static const u8 reg9a_def[] =
 		{0x00, 0x40, 0x20, 0x00, 0x00, 0x00};
@@ -1655,7 +1656,11 @@ static void bridge_init(struct gspca_dev *gspca_dev,
 	reg_w1(gspca_dev, 0x01, sn9c1xx[1]);
 
 	/* configure gpio */
-	reg_w(gspca_dev, 0x01, &sn9c1xx[1], 2);
+	reg0102[0] = sn9c1xx[1];
+	reg0102[1] = sn9c1xx[2];
+	if (gspca_dev->audio)
+		reg0102[1] |= 0x04;	/* keep the audio connection */
+	reg_w(gspca_dev, 0x01, reg0102, 2);
 	reg_w(gspca_dev, 0x08, &sn9c1xx[8], 2);
 	reg_w(gspca_dev, 0x17, &sn9c1xx[0x17], 5);
 	switch (sd->sensor) {
@@ -1736,13 +1741,12 @@ static void bridge_init(struct gspca_dev *gspca_dev,
 		reg_w1(gspca_dev, 0x01, 0x40);
 		break;
 	case SENSOR_PO2030N:
+	case SENSOR_OV7660:
 		reg_w1(gspca_dev, 0x01, 0x63);
 		reg_w1(gspca_dev, 0x17, 0x20);
 		reg_w1(gspca_dev, 0x01, 0x62);
 		reg_w1(gspca_dev, 0x01, 0x42);
 		break;
-	case SENSOR_OV7660:
-		/* fall thru */
 	case SENSOR_SP80708:
 		reg_w1(gspca_dev, 0x01, 0x63);
 		reg_w1(gspca_dev, 0x17, 0x20);
@@ -1815,7 +1819,7 @@ static int sd_init(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	const u8 *sn9c1xx;
-	u8 regGpio[] = { 0x29, 0x74 };
+	u8 regGpio[] = { 0x29, 0x74 };		/* with audio */
 	u8 regF1;
 
 	/* setup a selector by bridge */
@@ -1855,7 +1859,7 @@ static int sd_init(struct gspca_dev *gspca_dev)
 			po2030n_probe(gspca_dev);
 			break;
 		}
-		regGpio[1] = 0x70;
+		regGpio[1] = 0x70;		/* no audio */
 		reg_w(gspca_dev, 0x01, regGpio, 2);
 		break;
 	default:
@@ -2273,7 +2277,7 @@ static int sd_start(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 	int i;
-	u8 reg1, reg2, reg17;
+	u8 reg1, reg17;
 	const u8 *sn9c1xx;
 	const u8 (*init)[8];
 	int mode;
@@ -2303,23 +2307,6 @@ static int sd_start(struct gspca_dev *gspca_dev)
 	/* initialize the sensor */
 	i2c_w_seq(gspca_dev, sensor_init[sd->sensor]);
 
-	switch (sd->sensor) {
-	case SENSOR_ADCM1700:
-		reg2 = 0x60;
-		break;
-	case SENSOR_OM6802:
-		reg2 = 0x71;
-		break;
-	case SENSOR_SP80708:
-		reg2 = 0x62;
-		break;
-	default:
-		reg2 = 0x40;
-		break;
-	}
-	reg_w1(gspca_dev, 0x02, reg2);
-	reg_w1(gspca_dev, 0x02, reg2);
-
 	reg_w1(gspca_dev, 0x15, sn9c1xx[0x15]);
 	reg_w1(gspca_dev, 0x16, sn9c1xx[0x16]);
 	reg_w1(gspca_dev, 0x12, sn9c1xx[0x12]);