[igt-dev] [RFC PATCH 1/4][i-g-t] include/drm-uapi: Add 3D LUT structs and its attributes

[Alex Hung]

A struct is defined for 3D LUT modes to be supported by hardware.
The elements includes lut_isze, lut_stride, bit_depth, color_format
and flags.

This is the same structure as in proposed kernel 3D LUT API.

Note: The kernel 3DLUT API proposal "Proposal for Pre-blending 3D LUT
interfaces" is sent to dri-devel mailing list.

Signed-off-by: Alex Hung <alex.hung at amd.com>
---
 include/drm-uapi/drm_mode.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/drm-uapi/drm_mode.h b/include/drm-uapi/drm_mode.h
index 97198609..2b60de95 100644
--- a/include/drm-uapi/drm_mode.h
+++ b/include/drm-uapi/drm_mode.h
@@ -845,6 +845,24 @@ struct drm_color_lut_range {
     __s32 min, max;
 };
 
+
+/*
+ * struct drm_mode_3dlut_mode - 3D LUT mode information.
+ * @lut_size: number of valid points on every dimension of 3D LUT.
+ * @lut_stride: number of points on every dimension of 3D LUT.
+ * @bit_depth: number of bits of RGB. If color_mode defines entries with higher
+ *             bit_depth the least significant bits will be truncated.
+ * @color_format: fourcc values, ex. DRM_FORMAT_XRGB16161616 or DRM_FORMAT_XBGR16161616.
+ * @flags: flags for hardware-sepcific features
+ */
+struct drm_mode_3dlut_mode {
+	__u16 lut_size;
+	__u16 lut_stride[3];
+	__u16 bit_depth;
+	__u32 color_format;
+	__u32 flags;
+};
+
 /**
  * struct hdr_metadata_infoframe - HDR Metadata Infoframe Data.
  *
-- 
2.25.1