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media: tuner-simple: allow setting mono radio mode 

For some types of tuners (Philips FMD1216ME(X) MK3 currently) we know that
letting TDA9887 output port 1 remain high (inactive) will switch FM radio
to mono mode.
Let's make use of this functionality - nothing changes for the default
stereo radio mode.

Tested on a Medion 95700 board which has a FMD1216ME tuner.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Maciej S. Szmigiero 2018-07-02 17:23:24 -04:00 committed by Mauro Carvalho Chehab
parent af16d0a132
commit 010b876ae9
1 changed files with 3 additions and 2 deletions
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5
drivers/media/tuners/tuner-simple.c
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@ -670,6 +670,7 @@ static int simple_set_radio_freq(struct dvb_frontend *fe,
int rc, j;
struct tuner_params *t_params;
unsigned int freq = params->frequency;
bool mono = params->audmode == V4L2_TUNER_MODE_MONO;
tun = priv->tun;
@ -736,8 +737,8 @@ static int simple_set_radio_freq(struct dvb_frontend *fe,
config |= TDA9887_PORT2_ACTIVE;
if (t_params->intercarrier_mode)
config |= TDA9887_INTERCARRIER;
/* if (t_params->port1_set_for_fm_mono)
config &= ~TDA9887_PORT1_ACTIVE;*/
if (t_params->port1_set_for_fm_mono && mono)
config &= ~TDA9887_PORT1_ACTIVE;
if (t_params->fm_gain_normal)
config |= TDA9887_GAIN_NORMAL;
if (t_params->radio_if == 2)