BGR48_12 is a reversed RGB format with 12 bits per component like BGR24,
expanded to 16bits.
Data in the 12 high bits, zeros in the 4 low bits,
arranged in little endian order.
Signed-off-by: Ming Qian <ming.qian@xxxxxxx>
---
.../userspace-api/media/v4l/pixfmt-rgb.rst | 33 +++++++++++++++++++
drivers/media/v4l2-core/v4l2-common.c | 1 +
drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
include/uapi/linux/videodev2.h | 3 ++
4 files changed, 38 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst b/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst
index d330aeb4d3eb..779f0bdda642 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-rgb.rst
@@ -956,6 +956,39 @@ number of bits for each component.
\endgroup
+12 Bits Per Component
+==============================
+
+These formats store an RGB triplet in six or eight bytes, with 12 bits per component.
+Expand the bits per component to 16 bits, data in the high bits, zeros in the low bits,
+arranged in little endian order.
+
+.. raw:: latex
+
+ \small
+
+.. flat-table:: RGB Formats With 12 Bits Per Component
+ :header-rows: 1
+
+ * - Identifier
+ - Code
+ - Byte 1-0
+ - Byte 3-2
+ - Byte 5-4
+ - Byte 7-6
+ * .. _V4L2-PIX-FMT-BGR48-12:
+
+ - ``V4L2_PIX_FMT_BGR48_12``
+ - 'B312'
+
+ - B\ :sub:`15-4`
+ - G\ :sub:`15-4`
+ - R\ :sub:`15-4`
+ -
+
+.. raw:: latex
+
+ \normalsize
Deprecated RGB Formats
======================
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index da313a0637de..16d3c91c7da2 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -252,6 +252,7 @@ const struct v4l2_format_info *v4l2_format_info(u32 format)
{ .format = V4L2_PIX_FMT_RGB565, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_RGB555, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
{ .format = V4L2_PIX_FMT_BGR666, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
+ { .format = V4L2_PIX_FMT_BGR48_12, .pixel_enc = V4L2_PIXEL_ENC_RGB, .mem_planes = 1, .comp_planes = 1, .bpp = { 6, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
/* YUV packed formats */
{ .format = V4L2_PIX_FMT_YUYV, .pixel_enc = V4L2_PIXEL_ENC_YUV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 7225e566c528..3490eb3f42e4 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1302,6 +1302,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break;
case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break;
case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break;
+ case V4L2_PIX_FMT_BGR48_12: descr = "12-bit Depth BGR"; break;
case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 8a6430bc4a00..3c5acd72606c 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -580,6 +580,9 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_RGBA1010102 v4l2_fourcc('R', 'A', '3', '0') /* 32 RGBA-10-10-10-2 */
#define V4L2_PIX_FMT_ARGB2101010 v4l2_fourcc('A', 'R', '3', '0') /* 32 ARGB-2-10-10-10 */
+/* RGB formats (6 or 8 bytes per pixel) */
+#define V4L2_PIX_FMT_BGR48_12 v4l2_fourcc('B', '3', '1', '2') /* 48 BGR 12-bit per component */
+
/* Grey formats */
#define V4L2_PIX_FMT_GREY v4l2_fourcc('G', 'R', 'E', 'Y') /* 8 Greyscale */
#define V4L2_PIX_FMT_Y4 v4l2_fourcc('Y', '0', '4', ' ') /* 4 Greyscale */
--
2.38.1
