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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-05 11:39:12 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-05 11:39:12 -0200 |
| commit | 53f02dd170952065cf1c6c18fefa194bd403c4ee (patch) | |
| tree | 53dd5b068511ade8fa276eb8846e6117fc8fedd4 /linux/drivers/media/video/em28xx | |
| parent | e743836c92c2f0fb9bf167dc094bb22ebbded955 (diff) | |
| download | mediapointer-dvb-s2-53f02dd170952065cf1c6c18fefa194bd403c4ee.tar.gz mediapointer-dvb-s2-53f02dd170952065cf1c6c18fefa194bd403c4ee.tar.bz2 | |
em28xx: turn off tuner when not used
From: Mauro Carvalho Chehab <mchehab@redhat.com>
em28xx devices generally get hot when xc3028 tuner is powered on. This
patch solves this by turning power off when the device is not used, at the
expense of having a higher load time, when calling a TV application.
Since firmware load happens on 1 or 2 seconds on most devices, this is not a pain.
Also, it helps to save the planet by saving some power :)
Priority: normal
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux/drivers/media/video/em28xx')
| -rw-r--r-- | linux/drivers/media/video/em28xx/em28xx-video.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/linux/drivers/media/video/em28xx/em28xx-video.c b/linux/drivers/media/video/em28xx/em28xx-video.c index 00d49c45f..ff960f90c 100644 --- a/linux/drivers/media/video/em28xx/em28xx-video.c +++ b/linux/drivers/media/video/em28xx/em28xx-video.c @@ -1758,6 +1758,9 @@ static int em28xx_v4l2_close(struct inode *inode, struct file *filp) return 0; } + /* Save some power by putting tuner to sleep */ + em28xx_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL); + /* do this before setting alternate! */ em28xx_uninit_isoc(dev); em28xx_set_mode(dev, EM28XX_SUSPEND); @@ -2203,6 +2206,9 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, mutex_unlock(&em28xx_extension_devlist_lock); mutex_unlock(&em28xx_devlist_mutex); + /* Save some power by putting tuner to sleep */ + em28xx_i2c_call_clients(dev, TUNER_SET_STANDBY, NULL); + return 0; fail_reg_devices: |