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Date: Wed, 5 Dec 2012 17:19:29 +0530
From: Prabhakar Lad <prabhakar.csengg@...il.com>
To: LMML <linux-media@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
LDOC <linux-doc@...r.kernel.org>,
"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
Sakari Ailus <sakari.ailus@....fi>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Guennadi Liakhovetski <g.liakhovetski@....de>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Hans Verkuil <hans.verkuil@...co.com>,
Hans de Goede <hdegoede@...hat.com>,
Chris MacGregor <chris@...ermato.com>,
Rob Landley <rob@...dley.net>,
Jeongtae Park <jtp.park@...sung.com>,
Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: [PATCH RFC v2] media: v4l2-ctrl: Add gain controls
From: Lad, Prabhakar <prabhakar.csengg@...il.com>
add support for per color component digital/analog gain controls
and also their corresponding offset.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
Cc: Sakari Ailus <sakari.ailus@....fi>
Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Kyungmin Park <kyungmin.park@...sung.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
Cc: Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc: Hans Verkuil <hans.verkuil@...co.com>
Cc: Hans de Goede <hdegoede@...hat.com>
Cc: Chris MacGregor <chris@...ermato.com>
Cc: Rob Landley <rob@...dley.net>
Cc: Jeongtae Park <jtp.park@...sung.com>
Cc: Mauro Carvalho Chehab <mchehab@...radead.org>
---
Changes for v2:
1: Fixed review comments pointed by Laurent.
2: Rebased on latest tree.
Documentation/DocBook/media/v4l/controls.xml | 54 ++++++++++++++++++++++++++
drivers/media/v4l2-core/v4l2-ctrls.c | 11 +++++
include/uapi/linux/v4l2-controls.h | 11 +++++
3 files changed, 76 insertions(+), 0 deletions(-)
diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml
index 7fe5be1..847a9bb 100644
--- a/Documentation/DocBook/media/v4l/controls.xml
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -4543,6 +4543,60 @@ interface and may change in the future.</para>
specific test patterns can be used to test if a device is working
properly.</entry>
</row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GAIN_RED</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GAIN_GREEN_RED</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GAIN_GREEN_BLUE</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GAIN_BLUE</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GAIN_GREEN</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr"> Some capture/sensor devices have
+ the capability to set per color component digital/analog gain values.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GAIN_OFFSET</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_BLUE_OFFSET</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RED_OFFSET</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GREEN_OFFSET</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GREEN_RED_OFFSET</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_GREEN_BLUE_OFFSET</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr"> Some capture/sensor devices have the
+ capability to set per color component digital/analog gain offset values.
+ V4L2_CID_GAIN_OFFSET is the global gain offset and the rest are per
+ color component gain offsets.</entry>
+ </row>
<row><entry></entry></row>
</tbody>
</tgroup>
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index f6ee201..05e3708 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -790,6 +790,17 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_LINK_FREQ: return "Link Frequency";
case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
case V4L2_CID_TEST_PATTERN: return "Test Pattern";
+ case V4L2_CID_GAIN_RED: return "Gain Red";
+ case V4L2_CID_GAIN_GREEN_RED: return "Gain Green Red";
+ case V4L2_CID_GAIN_GREEN_BLUE: return "Gain Green Blue";
+ case V4L2_CID_GAIN_BLUE: return "Gain Blue";
+ case V4L2_CID_GAIN_GREEN: return "Gain Green";
+ case V4L2_CID_GAIN_OFFSET: return "Gain Offset";
+ case V4L2_CID_BLUE_OFFSET: return "Gain Blue Offset";
+ case V4L2_CID_RED_OFFSET: return "Gain Red Offset";
+ case V4L2_CID_GREEN_OFFSET: return "Gain Green Offset";
+ case V4L2_CID_GREEN_RED_OFFSET: return "Gain Green Red Offset";
+ case V4L2_CID_GREEN_BLUE_OFFSET: return "Gain Green Blue Offset";
/* DV controls */
case V4L2_CID_DV_CLASS: return "Digital Video Controls";
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index f56c945..9b6b233 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -799,5 +799,16 @@ enum v4l2_jpeg_chroma_subsampling {
#define V4L2_CID_LINK_FREQ (V4L2_CID_IMAGE_PROC_CLASS_BASE + 1)
#define V4L2_CID_PIXEL_RATE (V4L2_CID_IMAGE_PROC_CLASS_BASE + 2)
#define V4L2_CID_TEST_PATTERN (V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)
+#define V4L2_CID_GAIN_RED (V4L2_CID_IMAGE_PROC_CLASS_BASE + 4)
+#define V4L2_CID_GAIN_GREEN_RED (V4L2_CID_IMAGE_PROC_CLASS_BASE + 5)
+#define V4L2_CID_GAIN_GREEN_BLUE (V4L2_CID_IMAGE_PROC_CLASS_BASE + 6)
+#define V4L2_CID_GAIN_BLUE (V4L2_CID_IMAGE_PROC_CLASS_BASE + 7)
+#define V4L2_CID_GAIN_GREEN (V4L2_CID_IMAGE_PROC_CLASS_BASE + 8)
+#define V4L2_CID_GAIN_OFFSET (V4L2_CID_IMAGE_PROC_CLASS_BASE + 9)
+#define V4L2_CID_BLUE_OFFSET (V4L2_CID_IMAGE_PROC_CLASS_BASE + 10)
+#define V4L2_CID_RED_OFFSET (V4L2_CID_IMAGE_PROC_CLASS_BASE + 11)
+#define V4L2_CID_GREEN_OFFSET (V4L2_CID_IMAGE_PROC_CLASS_BASE + 12)
+#define V4L2_CID_GREEN_RED_OFFSET (V4L2_CID_IMAGE_PROC_CLASS_BASE + 13)
+#define V4L2_CID_GREEN_BLUE_OFFSET (V4L2_CID_IMAGE_PROC_CLASS_BASE + 14)
#endif
--
1.7.4.1
--
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