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Subject: media: add default settings and module parameters for video controls
Author: Florian Echtler <f...@butterbrot.org>
Date: Thu Feb 8 03:43:04 2018 -0500
This patch adds parameter definitions and module parameters for the four
userspace controls that the SUR40 can currently provide.
Signed-off-by: Florian Echtler <f...@butterbrot.org>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/input/touchscreen/sur40.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
---
diff --git a/drivers/input/touchscreen/sur40.c
b/drivers/input/touchscreen/sur40.c
index 8375b06ba837..45ad5746aad8 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -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,
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