[Intel-gfx] [PATCH v2 1/4] drm: Add Y210, Y212, Y216 format definitions and fourcc

[Swati Sharma]

From: Vidya Srinivas <vidya.srinivas at intel.com>

The following pixel formats are packed format that follows 4:2:2
chroma sampling. For memory represenation each component is
allocated 16 bits each. Thus each pixel occupies a DWORD.

Y210:Valid data occupies MSB 10 bits.
LSB 6 bits are filled with zeroes.
Y212:Valid data occupies MSB 12 bits.
LSB 4 bits are filled with zeroes.
Y216:Valid data occupies 16 bits,
doesn't require any padding bits.

First 16 bits stores the Y value and the next 16 bits stores one
of the chroma samples alternatively. The first luma sample will
be accompanied by first U sample and second luma sample is
accompanied by the first V sample.

v2: is_yuv setted to true (mahesh)
    different order of yuv samples (mahesh): still update from
    hardware team pending
    change in comment (alexandru)

Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
---
 drivers/gpu/drm/drm_fourcc.c  | 3 +++
 include/uapi/drm/drm_fourcc.h | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index be1d6aa..143c26a 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -190,6 +190,9 @@ const struct drm_format_info *__drm_format_info(u32 format)
 		{ .format = DRM_FORMAT_UYVY,		.depth = 0,  .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
 		{ .format = DRM_FORMAT_VYUY,		.depth = 0,  .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
 		{ .format = DRM_FORMAT_AYUV,		.depth = 0,  .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true },
+		{ .format = DRM_FORMAT_Y210,            .depth = 0,  .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
+		{ .format = DRM_FORMAT_Y212,            .depth = 0,  .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
+		{ .format = DRM_FORMAT_Y216,            .depth = 0,  .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true },
 	};
 
 	unsigned int i;
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 139632b..95118cc 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -153,6 +153,14 @@
 #define DRM_FORMAT_AYUV		fourcc_code('A', 'Y', 'U', 'V') /* [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */
 
 /*
+ * Y2xx indicate for each component, xx valid data occupy msb
+ * 16-xx padding occupy lsb
+ */
+#define DRM_FORMAT_Y210         fourcc_code('Y', '2', '1', '0') /* [63:0] Y0:Cb0:Y1:Cr1 10:10:10:10 little endian */
+#define DRM_FORMAT_Y212         fourcc_code('Y', '2', '1', '2') /* [63:0] Y0:Cb0:Y1:Cr1 12:12:12:12 little endian */
+#define DRM_FORMAT_Y216         fourcc_code('Y', '2', '1', '6') /* [63:0] Y0:Cb0:Y1:Cr1 16:16:16:16 little endian */
+
+/*
  * 2 plane RGB + A
  * index 0 = RGB plane, same format as the corresponding non _A8 format has
  * index 1 = A plane, [7:0] A
-- 
1.9.1