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>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/media/video/bt8xx/bttv.h b/drivers/media/video/bt8xx/bttv.h
index a2e140a..e377e28 100644
--- a/drivers/media/video/bt8xx/bttv.h
+++ b/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[];