V4L/DVB (10562): bttv: rework the way digital inputs are indicated

The code was using a muxsel value of -1U to indicate a digital input.  A
couple places in were checking of muxsel < 0 to detect this, which doesn't
work of course because muxsel is unsigned and can't be negative.

Only a couple cards had digital inputs and it was always the last one, so
for the card database create a one bit field that indicates the last input
is digital.  On init, this is used to set a new field in the bttv struct to
the digital input's number or UNSET for none.  This makes it easier to
check if the current input is digital.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/bt8xx/bttv-cards.c

@@ -633,8 +633,9 @@ struct tvcard bttv_tvcards[] = {
 		.video_inputs	= 3,
 		/* .audio_inputs= 1, */
 		.svhs		= NO_SVHS,
+		.has_dig_in	= 1,
 		.gpiomask	= 7,
-		.muxsel		= { 2, 3, -1 },
+		.muxsel		= { 2, 3, 0 }, /* input 2 is digital */
 		/* .digital_mode= DIGITAL_MODE_CAMERA, */
 		.gpiomux 	= { 0, 0, 0, 0 },
 		.no_msp34xx	= 1,
@@ -1069,8 +1070,9 @@ struct tvcard bttv_tvcards[] = {
 		.video_inputs	= 5,
 		/* .audio_inputs= 1, */
 		.svhs		= 3,
+		.has_dig_in	= 1,
 		.gpiomask	= 0xAA0000,
-		.muxsel		= { 2, 3, 1, 1, -1 },
+		.muxsel		= { 2, 3, 1, 1, 0 }, /* input 4 is digital */
 		/* .digital_mode= DIGITAL_MODE_CAMERA, */
 		.gpiomux 	= { 0x20000, 0, 0x80000, 0x80000 },
 		.gpiomute 	= 0xa8000,
@@ -2539,8 +2541,9 @@ struct tvcard bttv_tvcards[] = {
 		.video_inputs	= 5,
 		/* .audio_inputs= 1, */
 		.svhs		= 3,
+		.has_dig_in	= 1,
 		.gpiomask	= 0x01fe00,
-		.muxsel		= { 2, 3, 1, 1, -1 },
+		.muxsel		= { 2, 3, 1, 1, 0 }, /* in 4 is digital */
 		/* .digital_mode= DIGITAL_MODE_CAMERA, */
 		.gpiomux	= { 0x00400, 0x10400, 0x04400, 0x80000 },
 		.gpiomute	= 0x12400,
@@ -3417,6 +3420,8 @@ void __devinit bttv_init_card2(struct bttv *btv)
 		bttv_call_i2c_clients(btv, TUNER_SET_CONFIG, &tda9887_cfg);
 	}
 
+	btv->dig = bttv_tvcards[btv->c.type].has_dig_in ?
+		   bttv_tvcards[btv->c.type].video_inputs - 1 : UNSET;
 	btv->svhs = bttv_tvcards[btv->c.type].svhs == NO_SVHS ?
 		    UNSET : bttv_tvcards[btv->c.type].svhs;
 	if (svhs[btv->c.nr] != UNSET)

drivers/media/video/bt8xx/bttv-driver.c

@@ -1040,7 +1040,7 @@ static void bt848A_set_timing(struct bttv *btv)
 	int table_idx = bttv_tvnorms[btv->tvnorm].sram;
 	int fsc       = bttv_tvnorms[btv->tvnorm].Fsc;
 
-	if (UNSET == bttv_tvcards[btv->c.type].muxsel[btv->input]) {
+	if (btv->input == btv->dig) {
 		dprintk("bttv%d: load digital timing table (table_idx=%d)\n",
 			btv->c.nr,table_idx);
 

drivers/media/video/bt8xx/bttv-risc.c

@@ -341,7 +341,7 @@ bttv_calc_geo_old(struct bttv *btv, struct bttv_geometry *geo,
 	int totalwidth   = tvnorm->totalwidth;
 	int scaledtwidth = tvnorm->scaledtwidth;
 
-	if (bttv_tvcards[btv->c.type].muxsel[btv->input] < 0) {
+	if (btv->input == btv->dig) {
 		swidth       = 720;
 		totalwidth   = 858;
 		scaledtwidth = 858;
@@ -391,7 +391,7 @@ bttv_calc_geo		(struct bttv *                  btv,
 	     && crop->width == tvnorm->cropcap.defrect.width
 	     && crop->height == tvnorm->cropcap.defrect.height
 	     && width <= tvnorm->swidth /* see PAL-Nc et al */)
-	    || bttv_tvcards[btv->c.type].muxsel[btv->input] < 0) {
+	    || btv->input == btv->dig) {
 		bttv_calc_geo_old(btv, geo, width, height,
 				  both_fields, tvnorm);
 		return;

drivers/media/video/bt8xx/bttv.h

@@ -224,6 +224,10 @@ struct tvcard {
 	u8 video_inputs;	/* Number of inputs */
 	unsigned int svhs:4;	/* Which input is s-video */
 #define NO_SVHS	15
+	unsigned int pll:2;
+#define PLL_NONE 0
+#define PLL_28   1
+#define PLL_35   2
 
 	/* i2c audio flags */
 	unsigned int no_msp34xx:1;
@@ -236,11 +240,8 @@ struct tvcard {
 	unsigned int has_dvb:1;
 	unsigned int has_remote:1;
 	unsigned int has_radio:1;
+	unsigned int has_dig_in:1; /* Has digital input (always last input) */
 	unsigned int no_gpioirq:1;
-	unsigned int pll:2;
-#define PLL_NONE 0
-#define PLL_28   1
-#define PLL_35   2
 };
 
 extern struct tvcard bttv_tvcards[];

drivers/media/video/bt8xx/bttvp.h

@@ -329,7 +329,7 @@ struct bttv {
 	unsigned int cardid;   /* pci subsystem id (bt878 based ones) */
 	unsigned int tuner_type;  /* tuner chip type */
 	unsigned int tda9887_conf;
-	unsigned int svhs;
+	unsigned int svhs, dig;
 	struct bttv_pll_info pll;
 	int triton1;
 	int gpioirq;