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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-05 10:31:16 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-30 09:38:15 -0200 |
| commit | 74a89b2ae352aca1d76789365e9f49964f2677e4 (patch) | |
| tree | fa7aeb55ff5fc964e306c1885a45f6b3f2e4bbd3 | |
| parent | 9e5d6760c28409dd4ebd1cbafee77e5f58d6d574 (diff) | |
| download | lwn-74a89b2ae352aca1d76789365e9f49964f2677e4.tar.gz lwn-74a89b2ae352aca1d76789365e9f49964f2677e4.zip | |
V4L/DVB (9769): tuner-xc2028: powers device of when not used
Since the firmware load is now fast on most boards, better to keep the tuner
off by default. A modprobe parameter were added to keep the old behavior,
to be used by old devices.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/common/tuners/tuner-xc2028.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c index b65e6803e6c6..8a964b417a75 100644 --- a/drivers/media/common/tuners/tuner-xc2028.c +++ b/drivers/media/common/tuners/tuner-xc2028.c @@ -28,6 +28,12 @@ static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable verbose debug messages"); +static int no_poweroff; +module_param(no_poweroff, int, 0644); +MODULE_PARM_DESC(debug, "0 (default) powers device off when not used.\n" + "1 keep device energized and with tuner ready all the times.\n" + " Faster, but consumes more power and keeps the device hotter\n"); + static char audio_std[8]; module_param_string(audio_std, audio_std, sizeof(audio_std), 0); MODULE_PARM_DESC(audio_std, @@ -1091,6 +1097,30 @@ static int xc2028_set_params(struct dvb_frontend *fe, T_DIGITAL_TV, type, 0, demod); } +static int xc2028_sleep(struct dvb_frontend *fe) +{ + struct xc2028_data *priv = fe->tuner_priv; + int rc = 0; + + /* Avoid firmware reload on slow devices */ + if (no_poweroff) + return; + + tuner_dbg("Putting xc2028/3028 into poweroff mode.\n"); + + mutex_lock(&priv->lock); + + if (priv->firm_version < 0x0202) + rc = send_seq(priv, {0x00, 0x08, 0x00, 0x00}); + else + rc = send_seq(priv, {0x80, 0x08, 0x00, 0x00}); + + priv->cur_fw.type = 0; /* need firmware reload */ + + mutex_unlock(&priv->lock); + + return rc; +} static int xc2028_dvb_release(struct dvb_frontend *fe) { @@ -1171,6 +1201,7 @@ static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = { .get_frequency = xc2028_get_frequency, .get_rf_strength = xc2028_signal, .set_params = xc2028_set_params, + .sleep = xc2028_sleep, }; struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe, |