The patch number 9770 was added via Mauro Carvalho Chehab <[EMAIL PROTECTED]>
to http://linuxtv.org/hg/v4l-dvb master development tree.
Kernel patches in this development tree may be modified to be backward
compatible with older kernels. Compatibility modifications will be
removed before inclusion into the mainstream Kernel
If anyone has any objections, please let us know by sending a message to:
[EMAIL PROTECTED]
------
From: Mauro Carvalho Chehab <[EMAIL PROTECTED]>
em28xx: turn off tuner when not used
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 <[EMAIL PROTECTED]>
---
linux/drivers/media/video/em28xx/em28xx-video.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -r 7276a5854219 -r 438b40dd760c
linux/drivers/media/video/em28xx/em28xx-video.c
--- a/linux/drivers/media/video/em28xx/em28xx-video.c Fri Dec 05 11:31:16
2008 -0200
+++ b/linux/drivers/media/video/em28xx/em28xx-video.c Fri Dec 05 11:39:12
2008 -0200
@@ -1758,6 +1758,9 @@ static int em28xx_v4l2_close(struct inod
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
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:
---
Patch is available at:
http://linuxtv.org/hg/v4l-dvb/rev/438b40dd760c18d274cf8212eb659887113b8f8b
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