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V4L/DVB (10566): bttv: clean up mux code for IDS Eagle

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This card apparently uses an external mux and the Bt878's mux should always
be set to MUX2.  The values for the external mux control bits were stored
in the muxsel field.  This meant that when changing inputs the driver would
switch the Bt878's mux to whatever value the external mux was supposed to
be set to, then eagle_muxsel() would switch it back to MUX2 and program the
external mux.  This creates an unnecessary switch of the Bt878's mux.

So change muxsel to be 2 for each input.  The external mux bits are just
"input&3" so they don't really need to be stored anywhere.  This also
eliminates the last non-standard use of the muxsel data.

Cc: M G Berberich <berberic@fmi.uni-passau.de>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Trent Piepho 2009-01-28 21:32:59 -03:00 committed by Mauro Carvalho Chehab
parent 13afaefc03
commit 430390e67b
1 changed files with 2 additions and 3 deletions
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5
drivers/media/video/bt8xx/bttv-cards.c
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@ -1799,7 +1799,7 @@ struct tvcard bttv_tvcards[] = {
.tuner_addr = ADDR_UNSET,
.svhs = NO_SVHS,
.gpiomask = 0,
.muxsel = { 0, 1, 2, 3 },
.muxsel = { 2, 2, 2, 2 },
.muxsel_hook = eagle_muxsel,
.no_msp34xx = 1,
.no_tda9875 = 1,
@ -3109,8 +3109,7 @@ static void init_ids_eagle(struct bttv *btv)
* has its own multiplexer */
static void eagle_muxsel(struct bttv *btv, unsigned int input)
{
btaor((2)<<5, ~(3<<5), BT848_IFORM);
gpio_bits(3,bttv_tvcards[btv->c.type].muxsel[input&7]);
gpio_bits(3, input & 3);
/* composite */
/* set chroma ADC to sleep */