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[media] tda9840: fix setting of the audio mode 

You have to first detect the current rxsubchans (mono, stereo or bilingual),
and depending on that you can set the audio mode. It does not automatically
switch when the audio channels change.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-05-01 10:06:40 -03:00 committed by Mauro Carvalho Chehab
parent aaab4951a6
commit 8bb5bafa80
1 changed files with 45 additions and 32 deletions
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77
drivers/media/video/tda9840.c
View File

@ -66,41 +66,11 @@ static void tda9840_write(struct v4l2_subdev *sd, u8 reg, u8 val)
val, reg);
}
static int tda9840_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
{
int byte;
if (t->index)
return -EINVAL;
switch (t->audmode) {
case V4L2_TUNER_MODE_STEREO:
byte = TDA9840_SET_STEREO;
break;
case V4L2_TUNER_MODE_LANG1_LANG2:
byte = TDA9840_SET_BOTH;
break;
case V4L2_TUNER_MODE_LANG1:
byte = TDA9840_SET_LANG1;
break;
case V4L2_TUNER_MODE_LANG2:
byte = TDA9840_SET_LANG2;
break;
default:
byte = TDA9840_SET_MONO;
break;
}
v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte);
tda9840_write(sd, SWITCH, byte);
return 0;
}
static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
static int tda9840_status(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 byte;
t->rxsubchans = V4L2_TUNER_SUB_MONO;
if (1 != i2c_master_recv(client, &byte, 1)) {
v4l2_dbg(1, debug, sd,
"i2c_master_recv() failed\n");
@ -114,8 +84,51 @@ static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
}
v4l2_dbg(1, debug, sd, "TDA9840_DETECT: byte: 0x%02x\n", byte);
return byte & 0x60;
}
switch (byte & 0x60) {
static int tda9840_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
{
int stat = tda9840_status(sd);
int byte;
if (t->index)
return -EINVAL;
stat = stat < 0 ? 0 : stat;
if (stat == 0 || stat == 0x60) /* mono input */
byte = TDA9840_SET_MONO;
else if (stat == 0x40) /* stereo input */
byte = (t->audmode == V4L2_TUNER_MODE_MONO) ?
TDA9840_SET_MONO : TDA9840_SET_STEREO;
else { /* bilingual */
switch (t->audmode) {
case V4L2_TUNER_MODE_LANG1_LANG2:
byte = TDA9840_SET_BOTH;
break;
case V4L2_TUNER_MODE_LANG2:
byte = TDA9840_SET_LANG2;
break;
default:
byte = TDA9840_SET_LANG1;
break;
}
}
v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte);
tda9840_write(sd, SWITCH, byte);
return 0;
}
static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
{
int stat = tda9840_status(sd);
if (stat < 0)
return stat;
t->rxsubchans = V4L2_TUNER_SUB_MONO;
switch (stat & 0x60) {
case 0x00:
t->rxsubchans = V4L2_TUNER_SUB_MONO;
break;