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V4L/DVB: v4l2_subdev, cx23885: Differentiate IR carrier sense and I/O pin inversion

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There is a distinction on IR Tx for the CX2388[578] chips of carrier
sense inversion (space is a carrier burst and mark is no burst) and I/O
pin level inversion (0 is high output level, 1 is low output level).
Allow the caller to set these parameters distinctly as v4l2_subdevice
IR parameters.  This permits the IR device to be configured and enabled
without the IR Tx LED being on during idle/space time due to an external
hardware level inversion

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls
2010-07-18 19:57:25 -03:00
committed by Mauro Carvalho Chehab
parent d06d5777b2
commit 5a28d9a320
3 changed files with 29 additions and 10 deletions
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5
include/media/v4l2-subdev.h
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@@ -379,7 +379,10 @@ struct v4l2_subdev_ir_parameters {
u32 max_pulse_width; /* ns, valid only for baseband signal */
unsigned int carrier_freq; /* Hz, valid only for modulated signal*/
unsigned int duty_cycle; /* percent, valid only for modulated signal*/
bool invert; /* logically invert sense of mark/space */
bool invert_level; /* invert signal level */
/* Tx only */
bool invert_carrier_sense; /* Send 0/space as a carrier burst */
/* Rx only */
u32 noise_filter_min_width; /* ns, min time of a valid pulse */