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[media] tuner-core: fix a 2.6.39 regression with mt20xx 

As Simon reported, digital TV broke with mt20xx tuner due to
commit ad020dc2fe.

The mt20xx tuner passes V4L2_TUNER_DIGITAL_TV to tuner core. However, the
check_mode code now doesn't handle it well. Change the logic there to
avoid the breakage, and fix a test for analog-only at g_tuner.

Reported-by: Simon Arlott <simon@fire.lp0.eu>
Tested-by: Simon Arlott <simon@fire.lp0.eu>
Cc: stable@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2011-07-13 01:23:11 -03:00
parent 2d1969312d
commit a1ad5ec7f5
1 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/media/video/tuner-core.c
View File

@ -714,10 +714,19 @@ static int tuner_remove(struct i2c_client *client)
* returns 0.
* This function is needed for boards that have a separate tuner for
* radio (like devices with tea5767).
* NOTE: mt20xx uses V4L2_TUNER_DIGITAL_TV and calls set_tv_freq to
* select a TV frequency. So, t_mode = T_ANALOG_TV could actually
* be used to represent a Digital TV too.
*/
static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
{
if ((1 << mode & t->mode_mask) == 0)
int t_mode;
if (mode == V4L2_TUNER_RADIO)
t_mode = T_RADIO;
else
t_mode = T_ANALOG_TV;
if ((t_mode & t->mode_mask) == 0)
return -EINVAL;
return 0;
@ -984,7 +993,7 @@ static void tuner_status(struct dvb_frontend *fe)
case V4L2_TUNER_RADIO:
p = "radio";
break;
case V4L2_TUNER_DIGITAL_TV:
case V4L2_TUNER_DIGITAL_TV: /* Used by mt20xx */
p = "digital TV";
break;
case V4L2_TUNER_ANALOG_TV:
@ -1135,9 +1144,8 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
return 0;
if (vt->type == t->mode && analog_ops->get_afc)
vt->afc = analog_ops->get_afc(&t->fe);
if (vt->type == V4L2_TUNER_ANALOG_TV)
if (t->mode != V4L2_TUNER_RADIO) {
vt->capability |= V4L2_TUNER_CAP_NORM;
if (vt->type != V4L2_TUNER_RADIO) {
vt->rangelow = tv_range[0] * 16;
vt->rangehigh = tv_range[1] * 16;
return 0;