V4L/DVB (4769): Added support for a ASUSTEK P7131 Dual DVB-T variant

This card has no firmware eeprom. The old version still should not
need a firmware file due to an undocumented feature of the TDA10046.
The patch also includes Hermann Pitton's proposal for improved
antenna switch handling
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/video4linux/CARDLIST.saa7134

@@ -76,7 +76,7 @@
  75 -> AVerMedia AVerTVHD MCE A180              [1461:1044]
  76 -> SKNet MonsterTV Mobile                   [1131:4ee9]
  77 -> Pinnacle PCTV 40i/50i/110i (saa7133)     [11bd:002e]
- 78 -> ASUSTeK P7131 Dual                       [1043:4862]
+ 78 -> ASUSTeK P7131 Dual                       [1043:4862,1043:4876]
  79 -> Sedna/MuchTV PC TV Cardbus TV/Radio (ITO25 Rev:2B)
  80 -> ASUS Digimatrix TV                       [1043:0210]
  81 -> Philips Tiger reference design           [1131:2018]

drivers/media/video/saa7134/saa7134-cards.c

@@ -2462,14 +2462,17 @@ struct saa7134_board saa7134_boards[] = {
 			.vmux = 1,
 			.amux = TV,
 			.tv   = 1,
+			.gpio = 0x0000000,
 		},{
 			.name = name_comp1,
 			.vmux = 3,
 			.amux = LINE2,
+			.gpio = 0x0200000,
 		},{
 			.name = name_svideo,
 			.vmux = 8,
 			.amux = LINE2,
+			.gpio = 0x0200000,
 		}},
 		.radio = {
 			.name = name_radio,
@@ -3718,6 +3721,12 @@ struct pci_device_id saa7134_pci_tbl[] = {
 		.subvendor    = 0x1461, /* Avermedia Technologies Inc */
 		.subdevice    = 0x9715,
 		.driver_data  = SAA7134_BOARD_AVERMEDIA_STUDIO_507,
+	},{
+		.vendor       = PCI_VENDOR_ID_PHILIPS,
+		.device       = PCI_DEVICE_ID_PHILIPS_SAA7133,
+		.subvendor    = 0x1043,
+		.subdevice    = 0x4876,
+		.driver_data  = SAA7134_BOARD_ASUSTeK_P7131_DUAL,
 	},{
 		/* --- boards without eeprom + subsystem ID --- */
 		.vendor       = PCI_VENDOR_ID_PHILIPS,

drivers/media/video/saa7134/saa7134-dvb.c

@@ -894,6 +894,16 @@ static struct tda1004x_config pinnacle_pctv_310i_config = {
 
 /* ------------------------------------------------------------------ */
 
+static struct tda1004x_config asus_p7131_dual_config = {
+	.demod_address = 0x08,
+	.invert        = 1,
+	.invert_oclk   = 0,
+	.xtal_freq     = TDA10046_XTAL_16M,
+	.agc_config    = TDA10046_AGC_TDA827X,
+	.if_freq       = TDA10046_FREQ_045,
+	.request_firmware = philips_tda1004x_request_firmware,
+};
+
 static int asus_p7131_dual_tuner_init(struct dvb_frontend *fe)
 {
 	struct saa7134_dev *dev = fe->dvb->priv;
@@ -1207,7 +1217,7 @@ static int dvb_init(struct saa7134_dev *dev)
 		break;
 	case SAA7134_BOARD_ASUSTeK_P7131_DUAL:
 		dev->dvb.frontend = dvb_attach(tda10046_attach,
-					       &philips_tiger_config,
+					       &asus_p7131_dual_config,
 					       &dev->i2c_adap);
 		if (dev->dvb.frontend) {
 			dev->dvb.frontend->ops.i2c_gate_ctrl = tda8290_i2c_gate_ctrl;