From d6eef4947858ebebaf05d79bce7b8be0d4c036ba Mon Sep 17 00:00:00 2001 From: Michael Krufky Date: Sat, 24 Oct 2009 16:42:16 -0300 Subject: [PATCH] V4L/DVB (13247): tuner-core: dont force every tuner to set frequency at startup Setting the tuner frequency at the same time as initializing the other devices on the i2c bus can cause problems on devices that require firmware download or extensive calibration proceduces during initialization. This change allows us to prevent the tune at startup for devices that perform better without it. Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/tuner-core.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c index a9c9703..5b3eaa1 100644 --- a/drivers/media/video/tuner-core.c +++ b/drivers/media/video/tuner-core.c @@ -320,6 +320,7 @@ static void set_type(struct i2c_client *c, unsigned int type, struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops; struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops; unsigned char buffer[4]; + int tune_now = 1; if (type == UNSET || type == TUNER_ABSENT) { tuner_dbg ("tuner 0x%02x: Tuner type absent\n",c->addr); @@ -404,6 +405,7 @@ static void set_type(struct i2c_client *c, unsigned int type, }; if (!dvb_attach(xc2028_attach, &t->fe, &cfg)) goto attach_failed; + tune_now = 0; break; } case TUNER_TDA9887: @@ -419,6 +421,7 @@ static void set_type(struct i2c_client *c, unsigned int type, if (!dvb_attach(xc5000_attach, &t->fe, t->i2c->adapter, &xc5000_cfg)) goto attach_failed; + tune_now = 0; break; } case TUNER_NXP_TDA18271: @@ -430,6 +433,7 @@ static void set_type(struct i2c_client *c, unsigned int type, if (!dvb_attach(tda18271_attach, &t->fe, t->i2c->addr, t->i2c->adapter, &cfg)) goto attach_failed; + tune_now = 0; break; } default: @@ -458,12 +462,13 @@ static void set_type(struct i2c_client *c, unsigned int type, if (t->mode_mask == T_UNINITIALIZED) t->mode_mask = new_mode_mask; - /* xc2028/3028 and xc5000 requires a firmware to be set-up later + /* Some tuners require more initialization setup before use, + such as firmware download or device calibration. trying to set a frequency here will just fail FIXME: better to move set_freq to the tuner code. This is needed on analog tuners for PLL to properly work */ - if (t->type != TUNER_XC2028 && t->type != TUNER_XC5000) + if (tune_now) set_freq(c, (V4L2_TUNER_RADIO == t->mode) ? t->radio_freq : t->tv_freq); -- 2.7.4