[PATCH V10 23/30] lib/igt_color: Add 1D LUT color transformation support

[Alex Hung]

Add definitions and functions for setting 1D LUT on a
drm_colorop.

Add support for the SIZE prop of a colorop, as that's
required for understanding the size of the LUT to
construct.

Signed-off-by: Alex Hung <alex.hung at amd.com>
Co-developed-by: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 include/drm-uapi/drm_mode.h | 12 ++++++++++++
 lib/igt_color.c             |  8 ++++++++
 lib/igt_color.h             | 20 ++++++++++++++++++++
 lib/igt_kms.c               |  1 +
 lib/igt_kms.h               |  1 +
 5 files changed, 42 insertions(+)

diff --git a/include/drm-uapi/drm_mode.h b/include/drm-uapi/drm_mode.h
index fce45b5cf..106fbb889 100644
--- a/include/drm-uapi/drm_mode.h
+++ b/include/drm-uapi/drm_mode.h
@@ -874,6 +874,18 @@ struct drm_color_lut {
 	__u16 reserved;
 };
 
+/*
+ * struct drm_color_lut32
+ *
+ * 32-bit per channel color LUT entry, similar to drm_color_lut.
+ */
+struct drm_color_lut32 {
+	__u32 red;
+	__u32 green;
+	__u32 blue;
+	__u32 reserved;
+};
+
 enum drm_colorop_type {
 	DRM_COLOROP_1D_CURVE,
 	DRM_COLOROP_1D_LUT,
diff --git a/lib/igt_color.c b/lib/igt_color.c
index 6a639813f..a58ba0e57 100644
--- a/lib/igt_color.c
+++ b/lib/igt_color.c
@@ -428,3 +428,11 @@ void igt_colorop_set_ctm_3x4(igt_display_t *display,
 	/* set blob property */
 	igt_colorop_replace_prop_blob(colorop, IGT_COLOROP_DATA, &ctm, sizeof(ctm));
 }
+
+void igt_colorop_set_custom_1dlut(igt_display_t *display,
+				  igt_colorop_t *colorop,
+				  const igt_1dlut_t *lut1d,
+				  const size_t lut_size)
+{
+	igt_colorop_replace_prop_blob(colorop, IGT_COLOROP_DATA, lut1d, lut_size);
+}
diff --git a/lib/igt_color.h b/lib/igt_color.h
index 9f56536a3..88de8166f 100644
--- a/lib/igt_color.h
+++ b/lib/igt_color.h
@@ -17,6 +17,8 @@
 #include "igt_fb.h"
 #include "igt_kms.h"
 
+#define MAX_COLOR_LUT_ENTRIES 4096
+
 struct igt_color_tf {
 	float g, a, b, c, d, e, f;
 };
@@ -37,6 +39,17 @@ typedef struct igt_pixel {
 	float b;
 } igt_pixel_t;
 
+typedef struct igt_1dlut {
+	struct drm_color_lut32 lut[MAX_COLOR_LUT_ENTRIES];
+} igt_1dlut_t;
+
+igt_1dlut_t igt_1dlut_srgb_inv_eotf = { {
+} };
+
+
+igt_1dlut_t igt_1dlut_srgb_eotf = { {
+} };
+
 typedef struct igt_matrix_3x4 {
 	/*
 	 * out   matrix          in
@@ -94,11 +107,18 @@ void igt_colorop_set_ctm_3x4(igt_display_t *display,
 			     igt_colorop_t *colorop,
 			     const igt_matrix_3x4_t *matrix);
 
+void igt_colorop_set_custom_1dlut(igt_display_t *display,
+				  igt_colorop_t *colorop,
+				  const igt_1dlut_t *lut1d,
+				  const size_t lut_size);
+
 /* transformations */
 
 void igt_color_srgb_inv_eotf(igt_pixel_t *pixel);
 void igt_color_srgb_eotf(igt_pixel_t *pixel);
 
+void igt_color_srgb_inv_eotf_custom_lut(igt_pixel_t *pixel);
+
 void igt_color_pq_inv_eotf(igt_pixel_t *pixel);
 void igt_color_pq_eotf(igt_pixel_t *pixel);
 
diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index d1c23b4a4..bdde2fc72 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -710,6 +710,7 @@ const char * const igt_colorop_prop_names[IGT_NUM_COLOROP_PROPS] = {
 	[IGT_COLOROP_TYPE] = "TYPE",
 	[IGT_COLOROP_BYPASS] = "BYPASS",
 	[IGT_COLOROP_CURVE_1D_TYPE] = "CURVE_1D_TYPE",
+	[IGT_COLOROP_SIZE] = "SIZE",
 	[IGT_COLOROP_DATA] = "DATA",
 	[IGT_COLOROP_NEXT] = "NEXT",
 };
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 2a401cd3b..d0a7ed037 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -374,6 +374,7 @@ enum igt_atomic_colorop_properties {
 	IGT_COLOROP_TYPE,
 	IGT_COLOROP_BYPASS,
 	IGT_COLOROP_CURVE_1D_TYPE,
+	IGT_COLOROP_SIZE,
 	IGT_COLOROP_DATA,
 	IGT_COLOROP_NEXT,
 	IGT_NUM_COLOROP_PROPS
-- 
2.43.0