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media: add default settings and module parameters for video controls 

This patch adds parameter definitions and module parameters for the four
userspace controls that the SUR40 can currently provide.

Signed-off-by: Florian Echtler <floe@butterbrot.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Florian Echtler 2018-02-08 03:43:04 -05:00 committed by Mauro Carvalho Chehab
parent 0a90448ead
commit 4e6c558148
1 changed files with 34 additions and 0 deletions
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34
drivers/input/touchscreen/sur40.c
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@ -149,6 +149,40 @@ struct sur40_image_header {
#define SUR40_TOUCH 0x02
#define SUR40_TAG 0x04
/* video controls */
#define SUR40_BRIGHTNESS_MAX 0xff
#define SUR40_BRIGHTNESS_MIN 0x00
#define SUR40_BRIGHTNESS_DEF 0xff
#define SUR40_CONTRAST_MAX 0x0f
#define SUR40_CONTRAST_MIN 0x00
#define SUR40_CONTRAST_DEF 0x0a
#define SUR40_GAIN_MAX 0x09
#define SUR40_GAIN_MIN 0x00
#define SUR40_GAIN_DEF 0x08
#define SUR40_BACKLIGHT_MAX 0x01
#define SUR40_BACKLIGHT_MIN 0x00
#define SUR40_BACKLIGHT_DEF 0x01
#define sur40_str(s) #s
#define SUR40_PARAM_RANGE(lo, hi) " (range " sur40_str(lo) "-" sur40_str(hi) ")"
/* module parameters */
static uint brightness = SUR40_BRIGHTNESS_DEF;
module_param(brightness, uint, 0644);
MODULE_PARM_DESC(brightness, "set initial brightness"
SUR40_PARAM_RANGE(SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX));
static uint contrast = SUR40_CONTRAST_DEF;
module_param(contrast, uint, 0644);
MODULE_PARM_DESC(contrast, "set initial contrast"
SUR40_PARAM_RANGE(SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX));
static uint gain = SUR40_GAIN_DEF;
module_param(gain, uint, 0644);
MODULE_PARM_DESC(gain, "set initial gain"
SUR40_PARAM_RANGE(SUR40_GAIN_MIN, SUR40_GAIN_MAX));
static const struct v4l2_pix_format sur40_pix_format[] = {
{
.pixelformat = V4L2_TCH_FMT_TU08,