[PATCH] media: v4l2-ctrls: add control for test pattern

[Prabhakar Lad <prabhakar.lad@ti.com>]

From: Lad, Prabhakar <prabhakar.lad@ti.com>

add V4L2_CID_TEST_PATTERN of type menu, which determines
the internal test pattern selected by the device.

Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Rob Landley <rob@landley.net>
Cc: HeungJun Kim <riverful.kim@samsung.com>
Cc: Rob Landley <rob@landley.net>
---
 This patches has one checkpatch warning for line over
 80 characters altough it can be avoided I have kept it
 for consistency.

 Documentation/DocBook/media/v4l/controls.xml |   52 ++++++++++++++++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls.c         |   16 ++++++++
 include/linux/videodev2.h                    |   12 ++++++
 3 files changed, 80 insertions(+), 0 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml
index f704218..06f16e7 100644
--- a/Documentation/DocBook/media/v4l/controls.xml
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -4313,6 +4313,58 @@ interface and may change in the future.</para>
 	      </tbody>
 	    </entrytbl>
 	  </row>
+	  <row>
+	    <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN</constant></entry>
+	    <entry>menu</entry>
+	  </row>
+	  <row id="v4l2-test-pattern">
+	    <entry spanname="descr"> The capture devices/sensors have the capability to
+	    generate internal test patterns. This test patterns are used to test a device
+	    is properly working and can generate the desired waveforms that it supports.
+	    </entry>
+	  </row>
+	  <row>
+	    <entrytbl spanname="descr" cols="2">
+	      <tbody valign="top">
+	        <row>
+	         <entry><constant>V4L2_TEST_PATTERN_DISABLED</constant></entry>
+	          <entry>Test pattern generation is disabled</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_VERTICAL_LINES</constant></entry>
+	          <entry>Generate vertical lines as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_HORIZONTAL_LINES</constant></entry>
+	          <entry>Generate horizontal lines as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_DIAGONAL_LINES</constant></entry>
+	          <entry>Generate diagonal lines as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_SOLID_BLACK</constant></entry>
+	          <entry>Generate solid black color as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_SOLID_WHITE</constant></entry>
+	          <entry>Generate solid white color as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_SOLID_BLUE</constant></entry>
+	          <entry>Generate solid blue color as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_SOLID_RED</constant></entry>
+	          <entry>Generate solid red color as test pattern</entry>
+	        </row>
+	        <row>
+	          <entry><constant>V4L2_TEST_PATTERN_CHECKER_BOARD</constant></entry>
+	          <entry>Generate a checker board as test pattern</entry>
+	        </row>
+	      </tbody>
+	    </entrytbl>
+	  </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 2d7bc15..ae709d1 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -430,6 +430,18 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		"Advanced Predictor",
 		NULL,
 	};
+	static const char * const test_pattern[] = {
+		"Test Pattern Disabled",
+		"Vertical Lines",
+		"Horizontal Lines",
+		"Diagonal Lines",
+		"Solid Black",
+		"Solid White",
+		"Solid Blue",
+		"Solid Red",
+		"Checker Board",
+		NULL,
+	};
 
 	switch (id) {
 	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
@@ -509,6 +521,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		return jpeg_chroma_subsampling;
 	case V4L2_CID_DPCM_PREDICTOR:
 		return dpcm_predictor;
+	case V4L2_CID_TEST_PATTERN:
+		return test_pattern;
 
 	default:
 		return NULL;
@@ -740,6 +754,7 @@ 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_DPCM_PREDICTOR:		return "DPCM Predictor";
+	case V4L2_CID_TEST_PATTERN:		return "Test Pattern";
 
 	default:
 		return NULL;
@@ -841,6 +856,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_EXPOSURE_METERING:
 	case V4L2_CID_SCENE_MODE:
 	case V4L2_CID_DPCM_PREDICTOR:
+	case V4L2_CID_TEST_PATTERN:
 		*type = V4L2_CTRL_TYPE_MENU;
 		break;
 	case V4L2_CID_LINK_FREQ:
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index ca9fb78..1796079 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -2005,6 +2005,18 @@ enum v4l2_dpcm_predictor {
 	V4L2_DPCM_PREDICTOR_SIMPLE	= 0,
 	V4L2_DPCM_PREDICTOR_ADVANCED	= 1,
 };
+#define V4L2_CID_TEST_PATTERN			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 4)
+enum v4l2_test_pattern {
+	V4L2_TEST_PATTERN_DISABLED		= 0,
+	V4L2_TEST_PATTERN_VERTICAL_LINES	= 1,
+	V4L2_TEST_PATTERN_HORIZONTAL_LINES	= 2,
+	V4L2_TEST_PATTERN_DIAGONAL_LINES	= 3,
+	V4L2_TEST_PATTERN_SOLID_BLACK		= 4,
+	V4L2_TEST_PATTERN_SOLID_WHITE		= 5,
+	V4L2_TEST_PATTERN_SOLID_BLUE		= 6,
+	V4L2_TEST_PATTERN_SOLID_RED		= 7,
+	V4L2_TEST_PATTERN_CHECKER_BOARD		= 8,
+};
 
 /*
  *	T U N I N G
-- 
1.7.0.4