Re: [PATCH 1/4] drm: Add P010, P012, P016 format definitions and fourcc

[Juha-Pekka Heikkila]

Hi Alex,

For my patches there seems limited interest to get them merged before 
IGT support these modes..I'm not holding my breath for this.

https://lists.freedesktop.org/archives/intel-gfx/2018-September/174877.html

/Juha-Pekka

On 02.10.2018 18:00, Alexandru-Cosmin Gheorghe wrote:
Hi,

How is this going on, anything holding it back from getting merged ?
I'm interested in adding/using P010, [1]

Thank you,
Alex Gheorghe

[1] https://lists.freedesktop.org/archives/dri-devel/2018-August/186963.html

On Thu, Aug 30, 2018 at 03:41:11PM +0300, Juha-Pekka Heikkila wrote:
Add P010 definition, semi-planar yuv format where each component
is 16 bits 10 msb containing color value. First come Y plane [10:6]
followed by 2x2 subsampled Cr:Cb plane [10:6:10:6]

Add P012 definition, semi-planar yuv format where each component
is 16 bits 12 msb containing color value. First come Y plane [12:4]
followed by 2x2 subsampled Cr:Cb plane [12:4:12:4]

Add P016 definition, semi-planar yuv format where each component
is 16 bits. First come Y plane followed by 2x2 subsampled Cr:Cb
plane [16:16]

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikk...@gmail.com>
---
  drivers/gpu/drm/drm_fourcc.c  |  3 +++
  include/uapi/drm/drm_fourcc.h | 10 ++++++++++
  2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index 35c1e27..32e07a2 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -173,6 +173,9 @@ 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_P010,            .depth = 0,  
.num_planes = 2, .cpp = { 2, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true  },
+               { .format = DRM_FORMAT_P012,            .depth = 0,  
.num_planes = 2, .cpp = { 2, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true  },
+               { .format = DRM_FORMAT_P016,            .depth = 0,  
.num_planes = 2, .cpp = { 2, 4, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true  },
        };
  
  	unsigned int i;
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 2ed46e9..daaabb1 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -178,6 +178,16 @@ extern "C" {
  #define DRM_FORMAT_NV42               fourcc_code('N', 'V', '4', '2') /* 
non-subsampled Cb:Cr plane */
  
  /*
+ * 2 plane YCbCr
+ * index 0 = Y plane, [15:0] Y little endian where Pxxx indicate
+ * component xxx msb Y [xxx:16-xxx]
+ * index 1 = Cr:Cb plane, [31:0] Cr:Cb little endian [xxx:16-xxx:xxx:16-xxx]
+ */
+#define DRM_FORMAT_P010                fourcc_code('P', '0', '1', '0') /* 2x2 
subsampled Cr:Cb plane, 10 bit per channel */
+#define DRM_FORMAT_P012                fourcc_code('P', '0', '1', '2') /* 2x2 
subsampled Cr:Cb plane, 12 bit per channel */
+#define DRM_FORMAT_P016                fourcc_code('P', '0', '1', '6') /* 2x2 
subsampled Cr:Cb plane, 16 bit per channel */
+
+/*
   * 3 plane YCbCr
   * index 0: Y plane, [7:0] Y
   * index 1: Cb plane, [7:0] Cb
--
2.7.4

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