[PATCH v3 0/9] Add HSV format

[PATCH v3 0/9] Add HSV format

[Ricardo Ribalda Delgado]

HSV formats are extremely useful for image segmentation. This set of
patches makes v4l2 aware of this kind of formats.

Vivid changes have been divided to ease the reviewing process.

We are working on patches for Gstreamer and OpenCV that will make use
of these formats.

We still need to decide if and how we will support HUE range 0-255


Changelog:
v3:  Fix wrong handling of some YUV formats when brightness != 128

Suggested by Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-Remove unneeded empty lines on .rst file
Thanks!

Suggested by Hans Verkuil <hverkuil@xs4all.nl>
-Rebase over master and docs-next
-Introduce TPG_COLOR_ENC_LUMA for gray formats
-CodeStyle
Thanks!

v2: Suggested by Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
-Rebase on top of docs-next (port documentation to .rst)

Ricardo Ribalda Delgado (9):
  [media] videodev2.h Add HSV formats
  [media] Documentation: Add HSV format
  [media] Documentation: Add Ricardo Ribalda
  [media] vivid: code refactor for color encoding
  [media] vivid: Add support for HSV formats
  [media] vivid: Rename variable
  [media] vivid: Introduce TPG_COLOR_ENC_LUMA
  [media] vivid: Fix YUV555 and YUV565 handling
  [media] vivid: Local optimization

 Documentation/media/uapi/v4l/hsv-formats.rst       |  19 +
 Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst | 158 ++++++++
 Documentation/media/uapi/v4l/pixfmt.rst            |   1 +
 Documentation/media/uapi/v4l/v4l2.rst              |   9 +
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c      | 399 +++++++++++++--------
 drivers/media/platform/vivid/vivid-core.h          |   2 +-
 drivers/media/platform/vivid/vivid-vid-common.c    |  66 ++--
 drivers/media/v4l2-core/v4l2-ioctl.c               |   2 +
 include/media/v4l2-tpg.h                           |   9 +-
 include/uapi/linux/videodev2.h                     |   4 +
 10 files changed, 499 insertions(+), 170 deletions(-)
 create mode 100644 Documentation/media/uapi/v4l/hsv-formats.rst
 create mode 100644 Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst

-- 
2.8.1

[PATCH v3 1/9] [media] videodev2.h Add HSV formats

[Ricardo Ribalda Delgado]

These formats store the color information of the image
in a geometrical representation. The colors are mapped into a
cylinder, where the angle is the HUE, the height is the VALUE
and the distance to the center is the SATURATION. This is a very
useful format for image segmentation algorithms.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/v4l2-core/v4l2-ioctl.c | 2 ++
 include/uapi/linux/videodev2.h       | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index f899bf1c5fc0..54670cd59212 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1238,6 +1238,8 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	case V4L2_PIX_FMT_TM6000:	descr = "A/V + VBI Mux Packet"; break;
 	case V4L2_PIX_FMT_CIT_YYVYUY:	descr = "GSPCA CIT YYVYUY"; break;
 	case V4L2_PIX_FMT_KONICA420:	descr = "GSPCA KONICA420"; break;
+	case V4L2_PIX_FMT_HSV24:	descr = "24-bit HSV 8-8-8"; break;
+	case V4L2_PIX_FMT_HSV32:	descr = "32-bit XHSV 8-8-8-8"; break;
 	case V4L2_SDR_FMT_CU8:		descr = "Complex U8"; break;
 	case V4L2_SDR_FMT_CU16LE:	descr = "Complex U16LE"; break;
 	case V4L2_SDR_FMT_CS8:		descr = "Complex S8"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 724f43e69d03..c7fb760386cf 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -580,6 +580,10 @@ struct v4l2_pix_format {
 #define V4L2_PIX_FMT_SRGGB12 v4l2_fourcc('R', 'G', '1', '2') /* 12  RGRG.. GBGB.. */
 #define V4L2_PIX_FMT_SBGGR16 v4l2_fourcc('B', 'Y', 'R', '2') /* 16  BGBG.. GRGR.. */
 
+/* HSV formats */
+#define V4L2_PIX_FMT_HSV24 v4l2_fourcc('H', 'S', 'V', '3')
+#define V4L2_PIX_FMT_HSV32 v4l2_fourcc('H', 'S', 'V', '4')
+
 /* compressed formats */
 #define V4L2_PIX_FMT_MJPEG    v4l2_fourcc('M', 'J', 'P', 'G') /* Motion-JPEG   */
 #define V4L2_PIX_FMT_JPEG     v4l2_fourcc('J', 'P', 'E', 'G') /* JFIF JPEG     */
-- 
2.8.1

[PATCH v3 2/9] [media] Documentation: Add HSV format

[Ricardo Ribalda Delgado]

Describe the HSV formats

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 Documentation/media/uapi/v4l/hsv-formats.rst       |  19 +++
 Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst | 158 +++++++++++++++++++++
 Documentation/media/uapi/v4l/pixfmt.rst            |   1 +
 Documentation/media/uapi/v4l/v4l2.rst              |   5 +
 4 files changed, 183 insertions(+)
 create mode 100644 Documentation/media/uapi/v4l/hsv-formats.rst
 create mode 100644 Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst

diff --git a/Documentation/media/uapi/v4l/hsv-formats.rst b/Documentation/media/uapi/v4l/hsv-formats.rst
new file mode 100644
index 000000000000..f0f2615eaa95
--- /dev/null
+++ b/Documentation/media/uapi/v4l/hsv-formats.rst
@@ -0,0 +1,19 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _hsv-formats:
+
+***********
+HSV Formats
+***********
+
+These formats store the color information of the image
+in a geometrical representation. The colors are mapped into a
+cylinder, where the angle is the HUE, the height is the VALUE
+and the distance to the center is the SATURATION. This is a very
+useful format for image segmentation algorithms.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-packed-hsv
diff --git a/Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst b/Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst
new file mode 100644
index 000000000000..60ac821e309d
--- /dev/null
+++ b/Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst
@@ -0,0 +1,158 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _packed-hsv:
+
+******************
+Packed HSV formats
+******************
+
+*man Packed HSV formats(2)*
+
+Packed HSV formats
+
+
+Description
+===========
+
+The *hue* (h) is measured in degrees, one LSB represents two degrees.
+The *saturation* (s) and the *value* (v) are measured in percentage of the
+cylinder: 0 being the smallest value and 255 the maximum.
+
+
+The values are packed in 24 or 32 bit formats.
+
+
+.. flat-table:: Packed HSV Image Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    -  .. row 1
+
+       -  Identifier
+       -  Code
+       -
+       -  :cspan:`7` Byte 0 in memory
+       -
+       -  :cspan:`7` Byte 1
+       -
+       -  :cspan:`7` Byte 2
+       -
+       -  :cspan:`7` Byte 3
+
+    -  .. row 2
+
+       -
+       -
+       -  Bit
+       -  7
+       -  6
+       -  5
+       -  4
+       -  3
+       -  2
+       -  1
+       -  0
+       -
+       -  7
+       -  6
+       -  5
+       -  4
+       -  3
+       -  2
+       -  1
+       -  0
+       -
+       -  7
+       -  6
+       -  5
+       -  4
+       -  3
+       -  2
+       -  1
+       -  0
+       -
+       -  7
+       -  6
+       -  5
+       -  4
+       -  3
+       -  2
+       -  1
+       -  0
+
+    -  .. _V4L2-PIX-FMT-HSV32:
+
+       -  ``V4L2_PIX_FMT_HSV32``
+       -  'HSV4'
+       -
+       -  -
+       -  -
+       -  -
+       -  -
+       -  -
+       -  -
+       -  -
+       -  -
+       -
+       -  h\ :sub:`7`
+       -  h\ :sub:`6`
+       -  h\ :sub:`5`
+       -  h\ :sub:`4`
+       -  h\ :sub:`3`
+       -  h\ :sub:`2`
+       -  h\ :sub:`1`
+       -  h\ :sub:`0`
+       -
+       -  s\ :sub:`7`
+       -  s\ :sub:`6`
+       -  s\ :sub:`5`
+       -  s\ :sub:`4`
+       -  s\ :sub:`3`
+       -  s\ :sub:`2`
+       -  s\ :sub:`1`
+       -  s\ :sub:`0`
+       -
+       -  v\ :sub:`7`
+       -  v\ :sub:`6`
+       -  v\ :sub:`5`
+       -  v\ :sub:`4`
+       -  v\ :sub:`3`
+       -  v\ :sub:`2`
+       -  v\ :sub:`1`
+       -  v\ :sub:`0`
+
+    -  .. _V4L2-PIX-FMT-HSV24:
+
+       -  ``V4L2_PIX_FMT_HSV24``
+       -  'HSV3'
+       -
+       -  h\ :sub:`7`
+       -  h\ :sub:`6`
+       -  h\ :sub:`5`
+       -  h\ :sub:`4`
+       -  h\ :sub:`3`
+       -  h\ :sub:`2`
+       -  h\ :sub:`1`
+       -  h\ :sub:`0`
+       -
+       -  s\ :sub:`7`
+       -  s\ :sub:`6`
+       -  s\ :sub:`5`
+       -  s\ :sub:`4`
+       -  s\ :sub:`3`
+       -  s\ :sub:`2`
+       -  s\ :sub:`1`
+       -  s\ :sub:`0`
+       -
+       -  v\ :sub:`7`
+       -  v\ :sub:`6`
+       -  v\ :sub:`5`
+       -  v\ :sub:`4`
+       -  v\ :sub:`3`
+       -  v\ :sub:`2`
+       -  v\ :sub:`1`
+       -  v\ :sub:`0`
+       -
+       -
+
+Bit 7 is the most significant bit.
diff --git a/Documentation/media/uapi/v4l/pixfmt.rst b/Documentation/media/uapi/v4l/pixfmt.rst
index 81222a99f7ce..1d2270422345 100644
--- a/Documentation/media/uapi/v4l/pixfmt.rst
+++ b/Documentation/media/uapi/v4l/pixfmt.rst
@@ -29,6 +29,7 @@ see also :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`.)
     pixfmt-indexed
     pixfmt-rgb
     yuv-formats
+    hsv-formats
     depth-formats
     pixfmt-013
     sdr-formats
diff --git a/Documentation/media/uapi/v4l/v4l2.rst b/Documentation/media/uapi/v4l/v4l2.rst
index c0859ebc88ee..6d23bc987f51 100644
--- a/Documentation/media/uapi/v4l/v4l2.rst
+++ b/Documentation/media/uapi/v4l/v4l2.rst
@@ -85,6 +85,11 @@ part can be used and distributed without restrictions.
 Revision History
 ****************
 
+:revision: 4.8 / 2016-07-15 (*rr*)
+
+Introduce HSV formats.
+
+
 :revision: 4.5 / 2015-10-29 (*rr*)
 
 Extend VIDIOC_G_EXT_CTRLS;. Replace ctrl_class with a new union with
-- 
2.8.1

[PATCH v3 3/9] [media] Documentation: Add Ricardo Ribalda

[Ricardo Ribalda Delgado]

My initials were on the Changelog, but there was no link to my name.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 Documentation/media/uapi/v4l/v4l2.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/media/uapi/v4l/v4l2.rst b/Documentation/media/uapi/v4l/v4l2.rst
index 6d23bc987f51..330674a0f553 100644
--- a/Documentation/media/uapi/v4l/v4l2.rst
+++ b/Documentation/media/uapi/v4l/v4l2.rst
@@ -64,6 +64,10 @@ Authors, in alphabetical order:
 
   - SDR API.
 
+- Ribalda, Ricardo
+
+  - Introduce HSV formats and other minor changes.
+
 - Rubli, Martin
 
   - Designed and documented the VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS ioctls.
-- 
2.8.1

[PATCH v3 4/9] [media] vivid: code refactor for color encoding

[Ricardo Ribalda Delgado]

Replace is_yuv with color_enc Which can be used by other
color encodings such us HSV.

This change should ease the review of the following patches.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c   | 49 +++++++++++++++--------
 drivers/media/platform/vivid/vivid-core.h       |  2 +-
 drivers/media/platform/vivid/vivid-vid-common.c | 52 ++++++++++++-------------
 include/media/v4l2-tpg.h                        |  7 +++-
 4 files changed, 66 insertions(+), 44 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 3ec3cebe62b9..e8d2bf388597 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -237,13 +237,13 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_GREY:
 	case V4L2_PIX_FMT_Y16:
 	case V4L2_PIX_FMT_Y16_BE:
-		tpg->is_yuv = false;
+		tpg->color_enc = TGP_COLOR_ENC_RGB;
 		break;
 	case V4L2_PIX_FMT_YUV444:
 	case V4L2_PIX_FMT_YUV555:
 	case V4L2_PIX_FMT_YUV565:
 	case V4L2_PIX_FMT_YUV32:
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_YUV420M:
 	case V4L2_PIX_FMT_YVU420M:
@@ -256,7 +256,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->hdownsampling[1] = 2;
 		tpg->hdownsampling[2] = 2;
 		tpg->planes = 3;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_YUV422M:
 	case V4L2_PIX_FMT_YVU422M:
@@ -268,7 +268,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->hdownsampling[1] = 2;
 		tpg->hdownsampling[2] = 2;
 		tpg->planes = 3;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_NV16M:
 	case V4L2_PIX_FMT_NV61M:
@@ -280,7 +280,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->hdownsampling[1] = 1;
 		tpg->hmask[1] = ~1;
 		tpg->planes = 2;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_NV12M:
 	case V4L2_PIX_FMT_NV21M:
@@ -292,7 +292,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->hdownsampling[1] = 1;
 		tpg->hmask[1] = ~1;
 		tpg->planes = 2;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_YUV444M:
 	case V4L2_PIX_FMT_YVU444M:
@@ -302,21 +302,21 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->vdownsampling[2] = 1;
 		tpg->hdownsampling[1] = 1;
 		tpg->hdownsampling[2] = 1;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_NV24:
 	case V4L2_PIX_FMT_NV42:
 		tpg->vdownsampling[1] = 1;
 		tpg->hdownsampling[1] = 1;
 		tpg->planes = 2;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	case V4L2_PIX_FMT_YUYV:
 	case V4L2_PIX_FMT_UYVY:
 	case V4L2_PIX_FMT_YVYU:
 	case V4L2_PIX_FMT_VYUY:
 		tpg->hmask[0] = ~1;
-		tpg->is_yuv = true;
+		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
 	default:
 		return false;
@@ -777,7 +777,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 	 * Remember that r, g and b are still in the 0 - 0xff0 range.
 	 */
 	if (tpg->real_rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
-	    tpg->rgb_range == V4L2_DV_RGB_RANGE_FULL && !tpg->is_yuv) {
+	    tpg->rgb_range == V4L2_DV_RGB_RANGE_FULL &&
+	    tpg->color_enc == TGP_COLOR_ENC_RGB) {
 		/*
 		 * Convert from full range (which is what r, g and b are)
 		 * to limited range (which is the 'real' RGB range), which
@@ -787,7 +788,9 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		g = (g * 219) / 255 + (16 << 4);
 		b = (b * 219) / 255 + (16 << 4);
 	} else if (tpg->real_rgb_range != V4L2_DV_RGB_RANGE_LIMITED &&
-		   tpg->rgb_range == V4L2_DV_RGB_RANGE_LIMITED && !tpg->is_yuv) {
+		   tpg->rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
+		   tpg->color_enc == TGP_COLOR_ENC_RGB) {
+
 		/*
 		 * Clamp r, g and b to the limited range and convert to full
 		 * range since that's what we deliver.
@@ -820,7 +823,7 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 
 		cb = (128 << 4) + (tmp_cb * tpg->contrast * tpg->saturation) / (128 * 128);
 		cr = (128 << 4) + (tmp_cr * tpg->contrast * tpg->saturation) / (128 * 128);
-		if (tpg->is_yuv) {
+		if (tpg->color_enc == TGP_COLOR_ENC_YUV) {
 			tpg->colors[k][0] = clamp(y >> 4, 1, 254);
 			tpg->colors[k][1] = clamp(cb >> 4, 1, 254);
 			tpg->colors[k][2] = clamp(cr >> 4, 1, 254);
@@ -829,7 +832,7 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
 	}
 
-	if (tpg->is_yuv) {
+	if (tpg->color_enc == TGP_COLOR_ENC_YUV) {
 		/* Convert to YCbCr */
 		int y, cb, cr;
 
@@ -1842,7 +1845,8 @@ static void tpg_recalc(struct tpg_data *tpg)
 
 		if (tpg->quantization == V4L2_QUANTIZATION_DEFAULT)
 			tpg->real_quantization =
-				V4L2_MAP_QUANTIZATION_DEFAULT(!tpg->is_yuv,
+				V4L2_MAP_QUANTIZATION_DEFAULT(
+					tpg->color_enc != TGP_COLOR_ENC_YUV,
 					tpg->colorspace, tpg->real_ycbcr_enc);
 
 		tpg_precalculate_colors(tpg);
@@ -1889,11 +1893,24 @@ static int tpg_pattern_avg(const struct tpg_data *tpg,
 	return -1;
 }
 
+static const char *tpg_color_enc_str(enum tgp_color_enc
+						 color_enc)
+{
+	switch (color_enc) {
+	case TGP_COLOR_ENC_YUV:
+		return "YCbCr";
+	case TGP_COLOR_ENC_RGB:
+	default:
+		return "RGB";
+
+	}
+}
+
 void tpg_log_status(struct tpg_data *tpg)
 {
 	pr_info("tpg source WxH: %ux%u (%s)\n",
-			tpg->src_width, tpg->src_height,
-			tpg->is_yuv ? "YCbCr" : "RGB");
+		tpg->src_width, tpg->src_height,
+		tpg_color_enc_str(tpg->color_enc));
 	pr_info("tpg field: %u\n", tpg->field);
 	pr_info("tpg crop: %ux%u@%dx%d\n", tpg->crop.width, tpg->crop.height,
 			tpg->crop.left, tpg->crop.top);
diff --git a/drivers/media/platform/vivid/vivid-core.h b/drivers/media/platform/vivid/vivid-core.h
index a7daa40d0a49..b59b49456d45 100644
--- a/drivers/media/platform/vivid/vivid-core.h
+++ b/drivers/media/platform/vivid/vivid-core.h
@@ -80,7 +80,7 @@ extern unsigned vivid_debug;
 
 struct vivid_fmt {
 	u32	fourcc;          /* v4l2 format id */
-	bool	is_yuv;
+	enum	tgp_color_enc color_enc;
 	bool	can_do_overlay;
 	u8	vdownsampling[TPG_MAX_PLANES];
 	u32	alpha_mask;
diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
index fcda3ae4e6b0..bd56a4a69683 100644
--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -48,7 +48,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YUYV,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 		.data_offset = { PLANE0_DATA_OFFSET },
@@ -57,7 +57,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_UYVY,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -65,7 +65,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YVYU,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -73,7 +73,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_VYUY,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -81,7 +81,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YUV422P,
 		.vdownsampling = { 1, 1, 1 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 1,
 	},
@@ -89,7 +89,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YUV420,
 		.vdownsampling = { 1, 2, 2 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 1,
 	},
@@ -97,7 +97,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YVU420,
 		.vdownsampling = { 1, 2, 2 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 1,
 	},
@@ -105,7 +105,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV12,
 		.vdownsampling = { 1, 2 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 1,
 	},
@@ -113,7 +113,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV21,
 		.vdownsampling = { 1, 2 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 1,
 	},
@@ -121,7 +121,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV16,
 		.vdownsampling = { 1, 1 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 1,
 	},
@@ -129,7 +129,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV61,
 		.vdownsampling = { 1, 1 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 1,
 	},
@@ -137,7 +137,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV24,
 		.vdownsampling = { 1, 1 },
 		.bit_depth = { 8, 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 1,
 	},
@@ -145,7 +145,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV42,
 		.vdownsampling = { 1, 1 },
 		.bit_depth = { 8, 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 1,
 	},
@@ -184,7 +184,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_GREY,
 		.vdownsampling = { 1 },
 		.bit_depth = { 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -192,7 +192,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_Y16,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -200,7 +200,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_Y16_BE,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -452,7 +452,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV16M,
 		.vdownsampling = { 1, 1 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 2,
 		.data_offset = { PLANE0_DATA_OFFSET, 0 },
@@ -461,7 +461,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV61M,
 		.vdownsampling = { 1, 1 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 2,
 		.data_offset = { 0, PLANE0_DATA_OFFSET },
@@ -470,7 +470,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YUV420M,
 		.vdownsampling = { 1, 2, 2 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 3,
 	},
@@ -478,7 +478,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YVU420M,
 		.vdownsampling = { 1, 2, 2 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 3,
 	},
@@ -486,7 +486,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV12M,
 		.vdownsampling = { 1, 2 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 2,
 	},
@@ -494,7 +494,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_NV21M,
 		.vdownsampling = { 1, 2 },
 		.bit_depth = { 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 2,
 		.buffers = 2,
 	},
@@ -502,7 +502,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YUV422M,
 		.vdownsampling = { 1, 1, 1 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 3,
 	},
@@ -510,7 +510,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YVU422M,
 		.vdownsampling = { 1, 1, 1 },
 		.bit_depth = { 8, 4, 4 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 3,
 	},
@@ -518,7 +518,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YUV444M,
 		.vdownsampling = { 1, 1, 1 },
 		.bit_depth = { 8, 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 3,
 	},
@@ -526,7 +526,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_YVU444M,
 		.vdownsampling = { 1, 1, 1 },
 		.bit_depth = { 8, 8, 8 },
-		.is_yuv   = true,
+		.color_enc = TGP_COLOR_ENC_YUV,
 		.planes   = 3,
 		.buffers = 3,
 	},
diff --git a/include/media/v4l2-tpg.h b/include/media/v4l2-tpg.h
index 329bebfa930c..e4da507d40e2 100644
--- a/include/media/v4l2-tpg.h
+++ b/include/media/v4l2-tpg.h
@@ -87,6 +87,11 @@ enum tpg_move_mode {
 	TPG_MOVE_POS_FAST,
 };
 
+enum tgp_color_enc {
+	TGP_COLOR_ENC_RGB,
+	TGP_COLOR_ENC_YUV,
+};
+
 extern const char * const tpg_aspect_strings[];
 
 #define TPG_MAX_PLANES 3
@@ -119,7 +124,7 @@ struct tpg_data {
 	u8				saturation;
 	s16				hue;
 	u32				fourcc;
-	bool				is_yuv;
+	enum tgp_color_enc		color_enc;
 	u32				colorspace;
 	u32				xfer_func;
 	u32				ycbcr_enc;
-- 
2.8.1

[PATCH v3 5/9] [media] vivid: Add support for HSV formats

[Ricardo Ribalda Delgado]

This patch adds support for V4L2_PIX_FMT_HSV24 and V4L2_PIX_FMT_HSV32.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c   | 93 +++++++++++++++++++++++--
 drivers/media/platform/vivid/vivid-vid-common.c | 14 ++++
 include/media/v4l2-tpg.h                        |  1 +
 3 files changed, 104 insertions(+), 4 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index e8d2bf388597..53e512f5a6b6 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -318,6 +318,10 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->hmask[0] = ~1;
 		tpg->color_enc = TGP_COLOR_ENC_YUV;
 		break;
+	case V4L2_PIX_FMT_HSV24:
+	case V4L2_PIX_FMT_HSV32:
+		tpg->color_enc = TGP_COLOR_ENC_HSV;
+		break;
 	default:
 		return false;
 	}
@@ -351,6 +355,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		break;
 	case V4L2_PIX_FMT_RGB24:
 	case V4L2_PIX_FMT_BGR24:
+	case V4L2_PIX_FMT_HSV24:
 		tpg->twopixelsize[0] = 2 * 3;
 		break;
 	case V4L2_PIX_FMT_BGR666:
@@ -361,6 +366,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_ARGB32:
 	case V4L2_PIX_FMT_ABGR32:
 	case V4L2_PIX_FMT_YUV32:
+	case V4L2_PIX_FMT_HSV32:
 		tpg->twopixelsize[0] = 2 * 4;
 		break;
 	case V4L2_PIX_FMT_NV12:
@@ -490,6 +496,64 @@ static inline int linear_to_rec709(int v)
 	return tpg_linear_to_rec709[v];
 }
 
+static void color_to_hsv(struct tpg_data *tpg, int r, int g, int b,
+			   int *h, int *s, int *v)
+{
+	int max_rgb, min_rgb, diff_rgb;
+	int aux;
+	int third;
+
+	r >>= 4;
+	g >>= 4;
+	b >>= 4;
+
+	/* Value */
+	max_rgb = max3(r, g, b);
+	*v = max_rgb;
+	if (!max_rgb) {
+		*h = 0;
+		*s = 0;
+		return;
+	}
+
+	/* Saturation */
+	min_rgb = min3(r, g, b);
+	diff_rgb = max_rgb - min_rgb;
+	aux = 255 * diff_rgb;
+	aux += max_rgb / 2;
+	aux /= max_rgb;
+	*s = aux;
+	if (!aux) {
+		*h = 0;
+		return;
+	}
+
+	/* Hue */
+	if (max_rgb == r) {
+		aux =  g - b;
+		third = 0;
+	} else if (max_rgb == g) {
+		aux =  b - r;
+		third = 60;
+	} else {
+		aux =  r - g;
+		third = 120;
+	}
+
+	aux *= 30;
+	aux += diff_rgb / 2;
+	aux /= diff_rgb;
+	aux += third;
+
+	/* Clamp Hue */
+	if (aux < 0)
+		aux += 180;
+	else if (aux > 180)
+		aux -= 180;
+	*h = aux;
+
+}
+
 static void rgb2ycbcr(const int m[3][3], int r, int g, int b,
 			int y_offset, int *y, int *cb, int *cr)
 {
@@ -832,7 +896,19 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
 	}
 
-	if (tpg->color_enc == TGP_COLOR_ENC_YUV) {
+	switch (tpg->color_enc) {
+	case TGP_COLOR_ENC_HSV:
+	{
+		int h, s, v;
+
+		color_to_hsv(tpg, r, g, b, &h, &s, &v);
+		tpg->colors[k][0] = h;
+		tpg->colors[k][1] = s;
+		tpg->colors[k][2] = v;
+		break;
+	}
+	case TGP_COLOR_ENC_YUV:
+	{
 		/* Convert to YCbCr */
 		int y, cb, cr;
 
@@ -866,7 +942,10 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		tpg->colors[k][0] = y;
 		tpg->colors[k][1] = cb;
 		tpg->colors[k][2] = cr;
-	} else {
+		break;
+	}
+	case TGP_COLOR_ENC_RGB:
+	{
 		if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
 			r = (r * 219) / 255 + (16 << 4);
 			g = (g * 219) / 255 + (16 << 4);
@@ -916,6 +995,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		tpg->colors[k][0] = r;
 		tpg->colors[k][1] = g;
 		tpg->colors[k][2] = b;
+		break;
+	}
 	}
 }
 
@@ -941,8 +1022,8 @@ static void gen_twopix(struct tpg_data *tpg,
 		alpha = 0;
 	if (color == TPG_COLOR_RANDOM)
 		precalculate_color(tpg, color);
-	r_y = tpg->colors[color][0]; /* R or precalculated Y */
-	g_u = tpg->colors[color][1]; /* G or precalculated U */
+	r_y = tpg->colors[color][0]; /* R or precalculated Y, H */
+	g_u = tpg->colors[color][1]; /* G or precalculated U, V */
 	b_v = tpg->colors[color][2]; /* B or precalculated V */
 
 	switch (tpg->fourcc) {
@@ -1124,6 +1205,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		buf[0][offset + 1] = (g_u << 5) | b_v;
 		break;
 	case V4L2_PIX_FMT_RGB24:
+	case V4L2_PIX_FMT_HSV24:
 		buf[0][offset] = r_y;
 		buf[0][offset + 1] = g_u;
 		buf[0][offset + 2] = b_v;
@@ -1141,6 +1223,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_RGB32:
 	case V4L2_PIX_FMT_XRGB32:
+	case V4L2_PIX_FMT_HSV32:
 		alpha = 0;
 		/* fall through */
 	case V4L2_PIX_FMT_YUV32:
@@ -1897,6 +1980,8 @@ static const char *tpg_color_enc_str(enum tgp_color_enc
 						 color_enc)
 {
 	switch (color_enc) {
+	case TGP_COLOR_ENC_HSV:
+		return "HSV";
 	case TGP_COLOR_ENC_YUV:
 		return "YCbCr";
 	case TGP_COLOR_ENC_RGB:
diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
index bd56a4a69683..869e26ea7cf5 100644
--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -445,6 +445,20 @@ struct vivid_fmt vivid_formats[] = {
 		.planes   = 1,
 		.buffers = 1,
 	},
+	{
+		.fourcc   = V4L2_PIX_FMT_HSV24, /* HSV 24bits */
+		.vdownsampling = { 1 },
+		.bit_depth = { 24 },
+		.planes   = 1,
+		.buffers = 1,
+	},
+	{
+		.fourcc   = V4L2_PIX_FMT_HSV32, /* HSV 32bits */
+		.vdownsampling = { 1 },
+		.bit_depth = { 32 },
+		.planes   = 1,
+		.buffers = 1,
+	},
 
 	/* Multiplanar formats */
 
diff --git a/include/media/v4l2-tpg.h b/include/media/v4l2-tpg.h
index e4da507d40e2..0f632ec619aa 100644
--- a/include/media/v4l2-tpg.h
+++ b/include/media/v4l2-tpg.h
@@ -90,6 +90,7 @@ enum tpg_move_mode {
 enum tgp_color_enc {
 	TGP_COLOR_ENC_RGB,
 	TGP_COLOR_ENC_YUV,
+	TGP_COLOR_ENC_HSV,
 };
 
 extern const char * const tpg_aspect_strings[];
-- 
2.8.1

[PATCH v3 6/9] [media] vivid: Rename variable

[Ricardo Ribalda Delgado]

r_y and g_u now also contain the H and V components on the HSV formats.
Rename the variables to reflect this.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 209 +++++++++++++-------------
 1 file changed, 105 insertions(+), 104 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 53e512f5a6b6..ba3fe65ceb98 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -1014,7 +1014,7 @@ static void gen_twopix(struct tpg_data *tpg,
 {
 	unsigned offset = odd * tpg->twopixelsize[0] / 2;
 	u8 alpha = tpg->alpha_component;
-	u8 r_y, g_u, b_v;
+	u8 r_y_h, g_u_s, b_v;
 
 	if (tpg->alpha_red_only && color != TPG_COLOR_CSC_RED &&
 				   color != TPG_COLOR_100_RED &&
@@ -1022,161 +1022,161 @@ static void gen_twopix(struct tpg_data *tpg,
 		alpha = 0;
 	if (color == TPG_COLOR_RANDOM)
 		precalculate_color(tpg, color);
-	r_y = tpg->colors[color][0]; /* R or precalculated Y, H */
-	g_u = tpg->colors[color][1]; /* G or precalculated U, V */
+	r_y_h = tpg->colors[color][0]; /* R or precalculated Y, H */
+	g_u_s = tpg->colors[color][1]; /* G or precalculated U, V */
 	b_v = tpg->colors[color][2]; /* B or precalculated V */
 
 	switch (tpg->fourcc) {
 	case V4L2_PIX_FMT_GREY:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		break;
 	case V4L2_PIX_FMT_Y16:
 		/*
-		 * Ideally both bytes should be set to r_y, but then you won't
+		 * Ideally both bytes should be set to r_y_h, but then you won't
 		 * be able to detect endian problems. So keep it 0 except for
-		 * the corner case where r_y is 0xff so white really will be
+		 * the corner case where r_y_h is 0xff so white really will be
 		 * white (0xffff).
 		 */
-		buf[0][offset] = r_y == 0xff ? r_y : 0;
-		buf[0][offset+1] = r_y;
+		buf[0][offset] = r_y_h == 0xff ? r_y_h : 0;
+		buf[0][offset+1] = r_y_h;
 		break;
 	case V4L2_PIX_FMT_Y16_BE:
 		/* See comment for V4L2_PIX_FMT_Y16 above */
-		buf[0][offset] = r_y;
-		buf[0][offset+1] = r_y == 0xff ? r_y : 0;
+		buf[0][offset] = r_y_h;
+		buf[0][offset+1] = r_y_h == 0xff ? r_y_h : 0;
 		break;
 	case V4L2_PIX_FMT_YUV422M:
 	case V4L2_PIX_FMT_YUV422P:
 	case V4L2_PIX_FMT_YUV420:
 	case V4L2_PIX_FMT_YUV420M:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		if (odd) {
-			buf[1][0] = (buf[1][0] + g_u) / 2;
+			buf[1][0] = (buf[1][0] + g_u_s) / 2;
 			buf[2][0] = (buf[2][0] + b_v) / 2;
 			buf[1][1] = buf[1][0];
 			buf[2][1] = buf[2][0];
 			break;
 		}
-		buf[1][0] = g_u;
+		buf[1][0] = g_u_s;
 		buf[2][0] = b_v;
 		break;
 	case V4L2_PIX_FMT_YVU422M:
 	case V4L2_PIX_FMT_YVU420:
 	case V4L2_PIX_FMT_YVU420M:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		if (odd) {
 			buf[1][0] = (buf[1][0] + b_v) / 2;
-			buf[2][0] = (buf[2][0] + g_u) / 2;
+			buf[2][0] = (buf[2][0] + g_u_s) / 2;
 			buf[1][1] = buf[1][0];
 			buf[2][1] = buf[2][0];
 			break;
 		}
 		buf[1][0] = b_v;
-		buf[2][0] = g_u;
+		buf[2][0] = g_u_s;
 		break;
 
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV12M:
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV16M:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		if (odd) {
-			buf[1][0] = (buf[1][0] + g_u) / 2;
+			buf[1][0] = (buf[1][0] + g_u_s) / 2;
 			buf[1][1] = (buf[1][1] + b_v) / 2;
 			break;
 		}
-		buf[1][0] = g_u;
+		buf[1][0] = g_u_s;
 		buf[1][1] = b_v;
 		break;
 	case V4L2_PIX_FMT_NV21:
 	case V4L2_PIX_FMT_NV21M:
 	case V4L2_PIX_FMT_NV61:
 	case V4L2_PIX_FMT_NV61M:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		if (odd) {
 			buf[1][0] = (buf[1][0] + b_v) / 2;
-			buf[1][1] = (buf[1][1] + g_u) / 2;
+			buf[1][1] = (buf[1][1] + g_u_s) / 2;
 			break;
 		}
 		buf[1][0] = b_v;
-		buf[1][1] = g_u;
+		buf[1][1] = g_u_s;
 		break;
 
 	case V4L2_PIX_FMT_YUV444M:
-		buf[0][offset] = r_y;
-		buf[1][offset] = g_u;
+		buf[0][offset] = r_y_h;
+		buf[1][offset] = g_u_s;
 		buf[2][offset] = b_v;
 		break;
 
 	case V4L2_PIX_FMT_YVU444M:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		buf[1][offset] = b_v;
-		buf[2][offset] = g_u;
+		buf[2][offset] = g_u_s;
 		break;
 
 	case V4L2_PIX_FMT_NV24:
-		buf[0][offset] = r_y;
-		buf[1][2 * offset] = g_u;
+		buf[0][offset] = r_y_h;
+		buf[1][2 * offset] = g_u_s;
 		buf[1][2 * offset + 1] = b_v;
 		break;
 
 	case V4L2_PIX_FMT_NV42:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		buf[1][2 * offset] = b_v;
-		buf[1][2 * offset + 1] = g_u;
+		buf[1][2 * offset + 1] = g_u_s;
 		break;
 
 	case V4L2_PIX_FMT_YUYV:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		if (odd) {
-			buf[0][1] = (buf[0][1] + g_u) / 2;
+			buf[0][1] = (buf[0][1] + g_u_s) / 2;
 			buf[0][3] = (buf[0][3] + b_v) / 2;
 			break;
 		}
-		buf[0][1] = g_u;
+		buf[0][1] = g_u_s;
 		buf[0][3] = b_v;
 		break;
 	case V4L2_PIX_FMT_UYVY:
-		buf[0][offset + 1] = r_y;
+		buf[0][offset + 1] = r_y_h;
 		if (odd) {
-			buf[0][0] = (buf[0][0] + g_u) / 2;
+			buf[0][0] = (buf[0][0] + g_u_s) / 2;
 			buf[0][2] = (buf[0][2] + b_v) / 2;
 			break;
 		}
-		buf[0][0] = g_u;
+		buf[0][0] = g_u_s;
 		buf[0][2] = b_v;
 		break;
 	case V4L2_PIX_FMT_YVYU:
-		buf[0][offset] = r_y;
+		buf[0][offset] = r_y_h;
 		if (odd) {
 			buf[0][1] = (buf[0][1] + b_v) / 2;
-			buf[0][3] = (buf[0][3] + g_u) / 2;
+			buf[0][3] = (buf[0][3] + g_u_s) / 2;
 			break;
 		}
 		buf[0][1] = b_v;
-		buf[0][3] = g_u;
+		buf[0][3] = g_u_s;
 		break;
 	case V4L2_PIX_FMT_VYUY:
-		buf[0][offset + 1] = r_y;
+		buf[0][offset + 1] = r_y_h;
 		if (odd) {
 			buf[0][0] = (buf[0][0] + b_v) / 2;
-			buf[0][2] = (buf[0][2] + g_u) / 2;
+			buf[0][2] = (buf[0][2] + g_u_s) / 2;
 			break;
 		}
 		buf[0][0] = b_v;
-		buf[0][2] = g_u;
+		buf[0][2] = g_u_s;
 		break;
 	case V4L2_PIX_FMT_RGB332:
-		buf[0][offset] = (r_y << 5) | (g_u << 2) | b_v;
+		buf[0][offset] = (r_y_h << 5) | (g_u_s << 2) | b_v;
 		break;
 	case V4L2_PIX_FMT_YUV565:
 	case V4L2_PIX_FMT_RGB565:
-		buf[0][offset] = (g_u << 5) | b_v;
-		buf[0][offset + 1] = (r_y << 3) | (g_u >> 3);
+		buf[0][offset] = (g_u_s << 5) | b_v;
+		buf[0][offset + 1] = (r_y_h << 3) | (g_u_s >> 3);
 		break;
 	case V4L2_PIX_FMT_RGB565X:
-		buf[0][offset] = (r_y << 3) | (g_u >> 3);
-		buf[0][offset + 1] = (g_u << 5) | b_v;
+		buf[0][offset] = (r_y_h << 3) | (g_u_s >> 3);
+		buf[0][offset + 1] = (g_u_s << 5) | b_v;
 		break;
 	case V4L2_PIX_FMT_RGB444:
 	case V4L2_PIX_FMT_XRGB444:
@@ -1184,8 +1184,8 @@ static void gen_twopix(struct tpg_data *tpg,
 		/* fall through */
 	case V4L2_PIX_FMT_YUV444:
 	case V4L2_PIX_FMT_ARGB444:
-		buf[0][offset] = (g_u << 4) | b_v;
-		buf[0][offset + 1] = (alpha & 0xf0) | r_y;
+		buf[0][offset] = (g_u_s << 4) | b_v;
+		buf[0][offset + 1] = (alpha & 0xf0) | r_y_h;
 		break;
 	case V4L2_PIX_FMT_RGB555:
 	case V4L2_PIX_FMT_XRGB555:
@@ -1193,32 +1193,33 @@ static void gen_twopix(struct tpg_data *tpg,
 		/* fall through */
 	case V4L2_PIX_FMT_YUV555:
 	case V4L2_PIX_FMT_ARGB555:
-		buf[0][offset] = (g_u << 5) | b_v;
-		buf[0][offset + 1] = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
+		buf[0][offset] = (g_u_s << 5) | b_v;
+		buf[0][offset + 1] = (alpha & 0x80) | (r_y_h << 2)
+						    | (g_u_s >> 3);
 		break;
 	case V4L2_PIX_FMT_RGB555X:
 	case V4L2_PIX_FMT_XRGB555X:
 		alpha = 0;
 		/* fall through */
 	case V4L2_PIX_FMT_ARGB555X:
-		buf[0][offset] = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
-		buf[0][offset + 1] = (g_u << 5) | b_v;
+		buf[0][offset] = (alpha & 0x80) | (r_y_h << 2) | (g_u_s >> 3);
+		buf[0][offset + 1] = (g_u_s << 5) | b_v;
 		break;
 	case V4L2_PIX_FMT_RGB24:
 	case V4L2_PIX_FMT_HSV24:
-		buf[0][offset] = r_y;
-		buf[0][offset + 1] = g_u;
+		buf[0][offset] = r_y_h;
+		buf[0][offset + 1] = g_u_s;
 		buf[0][offset + 2] = b_v;
 		break;
 	case V4L2_PIX_FMT_BGR24:
 		buf[0][offset] = b_v;
-		buf[0][offset + 1] = g_u;
-		buf[0][offset + 2] = r_y;
+		buf[0][offset + 1] = g_u_s;
+		buf[0][offset + 2] = r_y_h;
 		break;
 	case V4L2_PIX_FMT_BGR666:
-		buf[0][offset] = (b_v << 2) | (g_u >> 4);
-		buf[0][offset + 1] = (g_u << 4) | (r_y >> 2);
-		buf[0][offset + 2] = r_y << 6;
+		buf[0][offset] = (b_v << 2) | (g_u_s >> 4);
+		buf[0][offset + 1] = (g_u_s << 4) | (r_y_h >> 2);
+		buf[0][offset + 2] = r_y_h << 6;
 		buf[0][offset + 3] = 0;
 		break;
 	case V4L2_PIX_FMT_RGB32:
@@ -1229,8 +1230,8 @@ static void gen_twopix(struct tpg_data *tpg,
 	case V4L2_PIX_FMT_YUV32:
 	case V4L2_PIX_FMT_ARGB32:
 		buf[0][offset] = alpha;
-		buf[0][offset + 1] = r_y;
-		buf[0][offset + 2] = g_u;
+		buf[0][offset + 1] = r_y_h;
+		buf[0][offset + 2] = g_u_s;
 		buf[0][offset + 3] = b_v;
 		break;
 	case V4L2_PIX_FMT_BGR32:
@@ -1239,87 +1240,87 @@ static void gen_twopix(struct tpg_data *tpg,
 		/* fall through */
 	case V4L2_PIX_FMT_ABGR32:
 		buf[0][offset] = b_v;
-		buf[0][offset + 1] = g_u;
-		buf[0][offset + 2] = r_y;
+		buf[0][offset + 1] = g_u_s;
+		buf[0][offset + 2] = r_y_h;
 		buf[0][offset + 3] = alpha;
 		break;
 	case V4L2_PIX_FMT_SBGGR8:
-		buf[0][offset] = odd ? g_u : b_v;
-		buf[1][offset] = odd ? r_y : g_u;
+		buf[0][offset] = odd ? g_u_s : b_v;
+		buf[1][offset] = odd ? r_y_h : g_u_s;
 		break;
 	case V4L2_PIX_FMT_SGBRG8:
-		buf[0][offset] = odd ? b_v : g_u;
-		buf[1][offset] = odd ? g_u : r_y;
+		buf[0][offset] = odd ? b_v : g_u_s;
+		buf[1][offset] = odd ? g_u_s : r_y_h;
 		break;
 	case V4L2_PIX_FMT_SGRBG8:
-		buf[0][offset] = odd ? r_y : g_u;
-		buf[1][offset] = odd ? g_u : b_v;
+		buf[0][offset] = odd ? r_y_h : g_u_s;
+		buf[1][offset] = odd ? g_u_s : b_v;
 		break;
 	case V4L2_PIX_FMT_SRGGB8:
-		buf[0][offset] = odd ? g_u : r_y;
-		buf[1][offset] = odd ? b_v : g_u;
+		buf[0][offset] = odd ? g_u_s : r_y_h;
+		buf[1][offset] = odd ? b_v : g_u_s;
 		break;
 	case V4L2_PIX_FMT_SBGGR10:
-		buf[0][offset] = odd ? g_u << 2 : b_v << 2;
-		buf[0][offset + 1] = odd ? g_u >> 6 : b_v >> 6;
-		buf[1][offset] = odd ? r_y << 2 : g_u << 2;
-		buf[1][offset + 1] = odd ? r_y >> 6 : g_u >> 6;
+		buf[0][offset] = odd ? g_u_s << 2 : b_v << 2;
+		buf[0][offset + 1] = odd ? g_u_s >> 6 : b_v >> 6;
+		buf[1][offset] = odd ? r_y_h << 2 : g_u_s << 2;
+		buf[1][offset + 1] = odd ? r_y_h >> 6 : g_u_s >> 6;
 		buf[0][offset] |= (buf[0][offset] >> 2) & 3;
 		buf[1][offset] |= (buf[1][offset] >> 2) & 3;
 		break;
 	case V4L2_PIX_FMT_SGBRG10:
-		buf[0][offset] = odd ? b_v << 2 : g_u << 2;
-		buf[0][offset + 1] = odd ? b_v >> 6 : g_u >> 6;
-		buf[1][offset] = odd ? g_u << 2 : r_y << 2;
-		buf[1][offset + 1] = odd ? g_u >> 6 : r_y >> 6;
+		buf[0][offset] = odd ? b_v << 2 : g_u_s << 2;
+		buf[0][offset + 1] = odd ? b_v >> 6 : g_u_s >> 6;
+		buf[1][offset] = odd ? g_u_s << 2 : r_y_h << 2;
+		buf[1][offset + 1] = odd ? g_u_s >> 6 : r_y_h >> 6;
 		buf[0][offset] |= (buf[0][offset] >> 2) & 3;
 		buf[1][offset] |= (buf[1][offset] >> 2) & 3;
 		break;
 	case V4L2_PIX_FMT_SGRBG10:
-		buf[0][offset] = odd ? r_y << 2 : g_u << 2;
-		buf[0][offset + 1] = odd ? r_y >> 6 : g_u >> 6;
-		buf[1][offset] = odd ? g_u << 2 : b_v << 2;
-		buf[1][offset + 1] = odd ? g_u >> 6 : b_v >> 6;
+		buf[0][offset] = odd ? r_y_h << 2 : g_u_s << 2;
+		buf[0][offset + 1] = odd ? r_y_h >> 6 : g_u_s >> 6;
+		buf[1][offset] = odd ? g_u_s << 2 : b_v << 2;
+		buf[1][offset + 1] = odd ? g_u_s >> 6 : b_v >> 6;
 		buf[0][offset] |= (buf[0][offset] >> 2) & 3;
 		buf[1][offset] |= (buf[1][offset] >> 2) & 3;
 		break;
 	case V4L2_PIX_FMT_SRGGB10:
-		buf[0][offset] = odd ? g_u << 2 : r_y << 2;
-		buf[0][offset + 1] = odd ? g_u >> 6 : r_y >> 6;
-		buf[1][offset] = odd ? b_v << 2 : g_u << 2;
-		buf[1][offset + 1] = odd ? b_v >> 6 : g_u >> 6;
+		buf[0][offset] = odd ? g_u_s << 2 : r_y_h << 2;
+		buf[0][offset + 1] = odd ? g_u_s >> 6 : r_y_h >> 6;
+		buf[1][offset] = odd ? b_v << 2 : g_u_s << 2;
+		buf[1][offset + 1] = odd ? b_v >> 6 : g_u_s >> 6;
 		buf[0][offset] |= (buf[0][offset] >> 2) & 3;
 		buf[1][offset] |= (buf[1][offset] >> 2) & 3;
 		break;
 	case V4L2_PIX_FMT_SBGGR12:
-		buf[0][offset] = odd ? g_u << 4 : b_v << 4;
-		buf[0][offset + 1] = odd ? g_u >> 4 : b_v >> 4;
-		buf[1][offset] = odd ? r_y << 4 : g_u << 4;
-		buf[1][offset + 1] = odd ? r_y >> 4 : g_u >> 4;
+		buf[0][offset] = odd ? g_u_s << 4 : b_v << 4;
+		buf[0][offset + 1] = odd ? g_u_s >> 4 : b_v >> 4;
+		buf[1][offset] = odd ? r_y_h << 4 : g_u_s << 4;
+		buf[1][offset + 1] = odd ? r_y_h >> 4 : g_u_s >> 4;
 		buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
 		buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
 		break;
 	case V4L2_PIX_FMT_SGBRG12:
-		buf[0][offset] = odd ? b_v << 4 : g_u << 4;
-		buf[0][offset + 1] = odd ? b_v >> 4 : g_u >> 4;
-		buf[1][offset] = odd ? g_u << 4 : r_y << 4;
-		buf[1][offset + 1] = odd ? g_u >> 4 : r_y >> 4;
+		buf[0][offset] = odd ? b_v << 4 : g_u_s << 4;
+		buf[0][offset + 1] = odd ? b_v >> 4 : g_u_s >> 4;
+		buf[1][offset] = odd ? g_u_s << 4 : r_y_h << 4;
+		buf[1][offset + 1] = odd ? g_u_s >> 4 : r_y_h >> 4;
 		buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
 		buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
 		break;
 	case V4L2_PIX_FMT_SGRBG12:
-		buf[0][offset] = odd ? r_y << 4 : g_u << 4;
-		buf[0][offset + 1] = odd ? r_y >> 4 : g_u >> 4;
-		buf[1][offset] = odd ? g_u << 4 : b_v << 4;
-		buf[1][offset + 1] = odd ? g_u >> 4 : b_v >> 4;
+		buf[0][offset] = odd ? r_y_h << 4 : g_u_s << 4;
+		buf[0][offset + 1] = odd ? r_y_h >> 4 : g_u_s >> 4;
+		buf[1][offset] = odd ? g_u_s << 4 : b_v << 4;
+		buf[1][offset + 1] = odd ? g_u_s >> 4 : b_v >> 4;
 		buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
 		buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
 		break;
 	case V4L2_PIX_FMT_SRGGB12:
-		buf[0][offset] = odd ? g_u << 4 : r_y << 4;
-		buf[0][offset + 1] = odd ? g_u >> 4 : r_y >> 4;
-		buf[1][offset] = odd ? b_v << 4 : g_u << 4;
-		buf[1][offset + 1] = odd ? b_v >> 4 : g_u >> 4;
+		buf[0][offset] = odd ? g_u_s << 4 : r_y_h << 4;
+		buf[0][offset + 1] = odd ? g_u_s >> 4 : r_y_h >> 4;
+		buf[1][offset] = odd ? b_v << 4 : g_u_s << 4;
+		buf[1][offset + 1] = odd ? b_v >> 4 : g_u_s >> 4;
 		buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
 		buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
 		break;
-- 
2.8.1

[PATCH v3 7/9] [media] vivid: Introduce TPG_COLOR_ENC_LUMA

[Ricardo Ribalda Delgado]

Simplifies handling of Gray formats.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c   | 26 +++++++++++++++++++------
 drivers/media/platform/vivid/vivid-vid-common.c |  6 +++---
 include/media/v4l2-tpg.h                        |  1 +
 3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index ba3fe65ceb98..e91bf3cbaab9 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -234,10 +234,12 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_XBGR32:
 	case V4L2_PIX_FMT_ARGB32:
 	case V4L2_PIX_FMT_ABGR32:
+		tpg->color_enc = TGP_COLOR_ENC_RGB;
+		break;
 	case V4L2_PIX_FMT_GREY:
 	case V4L2_PIX_FMT_Y16:
 	case V4L2_PIX_FMT_Y16_BE:
-		tpg->color_enc = TGP_COLOR_ENC_RGB;
+		tpg->color_enc = TGP_COLOR_ENC_LUMA;
 		break;
 	case V4L2_PIX_FMT_YUV444:
 	case V4L2_PIX_FMT_YUV555:
@@ -825,9 +827,9 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		g <<= 4;
 		b <<= 4;
 	}
-	if (tpg->qual == TPG_QUAL_GRAY || tpg->fourcc == V4L2_PIX_FMT_GREY ||
-	    tpg->fourcc == V4L2_PIX_FMT_Y16 ||
-	    tpg->fourcc == V4L2_PIX_FMT_Y16_BE) {
+
+	if (tpg->qual == TPG_QUAL_GRAY ||
+	    tpg->color_enc ==  TGP_COLOR_ENC_LUMA) {
 		/* Rec. 709 Luma function */
 		/* (0.2126, 0.7152, 0.0722) * (255 * 256) */
 		r = g = b = (13879 * r + 46688 * g + 4713 * b) >> 16;
@@ -867,8 +869,9 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		b = (b - (16 << 4)) * 255 / 219;
 	}
 
-	if (tpg->brightness != 128 || tpg->contrast != 128 ||
-	    tpg->saturation != 128 || tpg->hue) {
+	if ((tpg->brightness != 128 || tpg->contrast != 128 ||
+	     tpg->saturation != 128 || tpg->hue) &&
+	    tpg->color_enc != TGP_COLOR_ENC_LUMA) {
 		/* Implement these operations */
 		int y, cb, cr;
 		int tmp_cb, tmp_cr;
@@ -894,6 +897,10 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 			return;
 		}
 		ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
+	} else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
+		   tpg->color_enc == TGP_COLOR_ENC_LUMA) {
+		r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
+		r += (tpg->brightness << 4) - (128 << 4);
 	}
 
 	switch (tpg->color_enc) {
@@ -944,6 +951,11 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 		tpg->colors[k][2] = cr;
 		break;
 	}
+	case TGP_COLOR_ENC_LUMA:
+	{
+		tpg->colors[k][0] = r >> 4;
+		break;
+	}
 	case TGP_COLOR_ENC_RGB:
 	{
 		if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
@@ -1985,6 +1997,8 @@ static const char *tpg_color_enc_str(enum tgp_color_enc
 		return "HSV";
 	case TGP_COLOR_ENC_YUV:
 		return "YCbCr";
+	case TGP_COLOR_ENC_LUMA:
+		return "Luma";
 	case TGP_COLOR_ENC_RGB:
 	default:
 		return "RGB";
diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
index 869e26ea7cf5..b78bca4c2f16 100644
--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -184,7 +184,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_GREY,
 		.vdownsampling = { 1 },
 		.bit_depth = { 8 },
-		.color_enc = TGP_COLOR_ENC_YUV,
+		.color_enc = TGP_COLOR_ENC_LUMA,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -192,7 +192,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_Y16,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.color_enc = TGP_COLOR_ENC_YUV,
+		.color_enc = TGP_COLOR_ENC_LUMA,
 		.planes   = 1,
 		.buffers = 1,
 	},
@@ -200,7 +200,7 @@ struct vivid_fmt vivid_formats[] = {
 		.fourcc   = V4L2_PIX_FMT_Y16_BE,
 		.vdownsampling = { 1 },
 		.bit_depth = { 16 },
-		.color_enc = TGP_COLOR_ENC_YUV,
+		.color_enc = TGP_COLOR_ENC_LUMA,
 		.planes   = 1,
 		.buffers = 1,
 	},
diff --git a/include/media/v4l2-tpg.h b/include/media/v4l2-tpg.h
index 0f632ec619aa..d2487c12657d 100644
--- a/include/media/v4l2-tpg.h
+++ b/include/media/v4l2-tpg.h
@@ -91,6 +91,7 @@ enum tgp_color_enc {
 	TGP_COLOR_ENC_RGB,
 	TGP_COLOR_ENC_YUV,
 	TGP_COLOR_ENC_HSV,
+	TGP_COLOR_ENC_LUMA,
 };
 
 extern const char * const tpg_aspect_strings[];
-- 
2.8.1

[PATCH v3 8/9] [media] vivid: Fix YUV555 and YUV565 handling

[Ricardo Ribalda Delgado]

precalculate_color() had a optimization that avoided duplicated
conversion for YUV formats. This optimization did not take into
consideration YUV444, YUV555, YUV565 or limited range quantization.

This patch keeps the optimization, but fixes the wrong handling.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index e91bf3cbaab9..1c862465e335 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -797,6 +797,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 	int r = tpg_colors[col].r;
 	int g = tpg_colors[col].g;
 	int b = tpg_colors[col].b;
+	int y, cb, cr;
+	bool ycbbr_valid = false;
 
 	if (k == TPG_COLOR_TEXTBG) {
 		col = tpg_get_textbg_color(tpg);
@@ -873,7 +875,6 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 	     tpg->saturation != 128 || tpg->hue) &&
 	    tpg->color_enc != TGP_COLOR_ENC_LUMA) {
 		/* Implement these operations */
-		int y, cb, cr;
 		int tmp_cb, tmp_cr;
 
 		/* First convert to YCbCr */
@@ -890,13 +891,10 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 
 		cb = (128 << 4) + (tmp_cb * tpg->contrast * tpg->saturation) / (128 * 128);
 		cr = (128 << 4) + (tmp_cr * tpg->contrast * tpg->saturation) / (128 * 128);
-		if (tpg->color_enc == TGP_COLOR_ENC_YUV) {
-			tpg->colors[k][0] = clamp(y >> 4, 1, 254);
-			tpg->colors[k][1] = clamp(cb >> 4, 1, 254);
-			tpg->colors[k][2] = clamp(cr >> 4, 1, 254);
-			return;
-		}
-		ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
+		if (tpg->color_enc == TGP_COLOR_ENC_YUV)
+			ycbbr_valid = true;
+		else
+			ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
 	} else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
 		   tpg->color_enc == TGP_COLOR_ENC_LUMA) {
 		r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
@@ -917,9 +915,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 	case TGP_COLOR_ENC_YUV:
 	{
 		/* Convert to YCbCr */
-		int y, cb, cr;
-
-		color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
+		if (!ycbbr_valid)
+			color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
 
 		if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
 			y = clamp(y, 16 << 4, 235 << 4);
-- 
2.8.1

[PATCH v3 9/9] [media] vivid: Local optimization

[Ricardo Ribalda Delgado]

Avoid duplicated data shifts when possible.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 1c862465e335..2c23c458b1a6 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -919,13 +919,14 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 			color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
 
 		if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
-			y = clamp(y, 16 << 4, 235 << 4);
-			cb = clamp(cb, 16 << 4, 240 << 4);
-			cr = clamp(cr, 16 << 4, 240 << 4);
+			y = clamp(y >> 4, 16, 235);
+			cb = clamp(cb >> 4, 16, 240);
+			cr = clamp(cr > 4, 16, 240);
+		} else {
+			y = clamp(y >> 4, 1, 254);
+			cb = clamp(cb >> 4, 1, 254);
+			cr = clamp(cr >> 4, 1, 254);
 		}
-		y = clamp(y >> 4, 1, 254);
-		cb = clamp(cb >> 4, 1, 254);
-		cr = clamp(cr >> 4, 1, 254);
 		switch (tpg->fourcc) {
 		case V4L2_PIX_FMT_YUV444:
 			y >>= 4;
-- 
2.8.1

Re: [PATCH v3 9/9] [media] vivid: Local optimization

[Ricardo Ribalda Delgado]

Hi

On Sat, Jul 16, 2016 at 12:41 PM, Ricardo Ribalda Delgado
<ricardo.ribalda@gmail.com> wrote:

> -                       cr = clamp(cr, 16 << 4, 240 << 4);
> +                       y = clamp(y >> 4, 16, 235);
> +                       cb = clamp(cb >> 4, 16, 240);
> +                       cr = clamp(cr > 4, 16, 240);
This line is obviously wrong, sorry about that.

I wait for some more comments and add it to v4.

Regards!

Re: [PATCH v3 4/9] [media] vivid: code refactor for color encoding

[Hans Verkuil]

On 07/16/2016 12:41 PM, Ricardo Ribalda Delgado wrote:
> Replace is_yuv with color_enc Which can be used by other
> color encodings such us HSV.
> 
> This change should ease the review of the following patches.
> 
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> ---
>  drivers/media/common/v4l2-tpg/v4l2-tpg-core.c   | 49 +++++++++++++++--------
>  drivers/media/platform/vivid/vivid-core.h       |  2 +-
>  drivers/media/platform/vivid/vivid-vid-common.c | 52 ++++++++++++-------------
>  include/media/v4l2-tpg.h                        |  7 +++-
>  4 files changed, 66 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> index 3ec3cebe62b9..e8d2bf388597 100644
> --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> @@ -1889,11 +1893,24 @@ static int tpg_pattern_avg(const struct tpg_data *tpg,
>  	return -1;
>  }
>  
> +static const char *tpg_color_enc_str(enum tgp_color_enc
> +						 color_enc)
> +{
> +	switch (color_enc) {
> +	case TGP_COLOR_ENC_YUV:
> +		return "YCbCr";

Use "Y'CbCr"

> +	case TGP_COLOR_ENC_RGB:
> +	default:
> +		return "RGB";

and "R'G'B'".

That's more precise.

> +
> +	}
> +}
> +
>  void tpg_log_status(struct tpg_data *tpg)
>  {
>  	pr_info("tpg source WxH: %ux%u (%s)\n",
> -			tpg->src_width, tpg->src_height,
> -			tpg->is_yuv ? "YCbCr" : "RGB");
> +		tpg->src_width, tpg->src_height,
> +		tpg_color_enc_str(tpg->color_enc));
>  	pr_info("tpg field: %u\n", tpg->field);
>  	pr_info("tpg crop: %ux%u@%dx%d\n", tpg->crop.width, tpg->crop.height,
>  			tpg->crop.left, tpg->crop.top);
> diff --git a/include/media/v4l2-tpg.h b/include/media/v4l2-tpg.h
> index 329bebfa930c..e4da507d40e2 100644
> --- a/include/media/v4l2-tpg.h
> +++ b/include/media/v4l2-tpg.h
> @@ -87,6 +87,11 @@ enum tpg_move_mode {
>  	TPG_MOVE_POS_FAST,
>  };
>  
> +enum tgp_color_enc {
> +	TGP_COLOR_ENC_RGB,
> +	TGP_COLOR_ENC_YUV,

Rename this to YCBCR. It's the technically correct name.

Regards,

	Hans

> +};
> +
>  extern const char * const tpg_aspect_strings[];
>  
>  #define TPG_MAX_PLANES 3
> @@ -119,7 +124,7 @@ struct tpg_data {
>  	u8				saturation;
>  	s16				hue;
>  	u32				fourcc;
> -	bool				is_yuv;
> +	enum tgp_color_enc		color_enc;
>  	u32				colorspace;
>  	u32				xfer_func;
>  	u32				ycbcr_enc;
> 

Re: [PATCH v3 8/9] [media] vivid: Fix YUV555 and YUV565 handling

[Hans Verkuil]

On 07/16/2016 12:41 PM, Ricardo Ribalda Delgado wrote:
> precalculate_color() had a optimization that avoided duplicated
> conversion for YUV formats. This optimization did not take into
> consideration YUV444, YUV555, YUV565 or limited range quantization.
> 
> This patch keeps the optimization, but fixes the wrong handling.
> 
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> ---
>  drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 19 ++++++++-----------
>  1 file changed, 8 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> index e91bf3cbaab9..1c862465e335 100644
> --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> @@ -797,6 +797,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
>  	int r = tpg_colors[col].r;
>  	int g = tpg_colors[col].g;
>  	int b = tpg_colors[col].b;
> +	int y, cb, cr;
> +	bool ycbbr_valid = false;

I guess you mean ycbcr_valid?

Regards,

	Hans

>  
>  	if (k == TPG_COLOR_TEXTBG) {
>  		col = tpg_get_textbg_color(tpg);
> @@ -873,7 +875,6 @@ static void precalculate_color(struct tpg_data *tpg, int k)
>  	     tpg->saturation != 128 || tpg->hue) &&
>  	    tpg->color_enc != TGP_COLOR_ENC_LUMA) {
>  		/* Implement these operations */
> -		int y, cb, cr;
>  		int tmp_cb, tmp_cr;
>  
>  		/* First convert to YCbCr */
> @@ -890,13 +891,10 @@ static void precalculate_color(struct tpg_data *tpg, int k)
>  
>  		cb = (128 << 4) + (tmp_cb * tpg->contrast * tpg->saturation) / (128 * 128);
>  		cr = (128 << 4) + (tmp_cr * tpg->contrast * tpg->saturation) / (128 * 128);
> -		if (tpg->color_enc == TGP_COLOR_ENC_YUV) {
> -			tpg->colors[k][0] = clamp(y >> 4, 1, 254);
> -			tpg->colors[k][1] = clamp(cb >> 4, 1, 254);
> -			tpg->colors[k][2] = clamp(cr >> 4, 1, 254);
> -			return;
> -		}
> -		ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
> +		if (tpg->color_enc == TGP_COLOR_ENC_YUV)
> +			ycbbr_valid = true;
> +		else
> +			ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
>  	} else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
>  		   tpg->color_enc == TGP_COLOR_ENC_LUMA) {
>  		r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
> @@ -917,9 +915,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
>  	case TGP_COLOR_ENC_YUV:
>  	{
>  		/* Convert to YCbCr */
> -		int y, cb, cr;
> -
> -		color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
> +		if (!ycbbr_valid)
> +			color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
>  
>  		if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
>  			y = clamp(y, 16 << 4, 235 << 4);
> 

Re: [PATCH v3 8/9] [media] vivid: Fix YUV555 and YUV565 handling

[Ricardo Ribalda Delgado]

Hi Hans


On Mon, Jul 18, 2016 at 10:51 AM, Hans Verkuil <hverkuil@xs4all.nl> wrote:
>> +     int y, cb, cr;
>> +     bool ycbbr_valid = false;
>
> I guess you mean ycbcr_valid?

Yes, I think the medical term is Saturday dyslexia :)

It is fixed on the next version.

Thanks!