[PATCH 17/28] drm/i915: Define segmented Lut and add capabilities to colorop

[Uma Shankar]

This defines the lut segments and create the color pipeline

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c | 109 +++++++++++++++++++++
 1 file changed, 109 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index e223edbe4c13..223cd1ff7291 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -3811,6 +3811,105 @@ static const struct intel_color_funcs ilk_color_funcs = {
 	.get_config = ilk_get_config,
 };
 
+static const struct drm_color_lut_range xelpd_degamma_hdr[] = {
+	/* segment 1 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 128,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = 0, .end = (1 << 24) - 1,
+		.min = 0, .max = (1 << 24) - 1,
+	},
+	/* segment 2 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_REUSE_LAST |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = (1 << 24) - 1, .end = 1 << 24,
+		.min = 0, .max = (1 << 27) - 1,
+	},
+	/* Segment 3 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_REUSE_LAST |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = 1 << 24, .end = 3 << 24,
+		.min = 0, .max = (1 << 27) - 1,
+	},
+	/* Segment 4 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_REUSE_LAST |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = 3 << 24, .end = 7 << 24,
+		.min = 0, .max = (1 << 27) - 1,
+	}
+};
+
+/* FIXME input bpc? */
+static const struct drm_color_lut_range xelpd_gamma_hdr[] = {
+	/*
+	 * ToDo: Add Segment 1
+	 * There is an optional fine segment added with 9 lut values
+	 * Will be added later
+	 */
+
+	/* segment 2 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 32,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = 0, .end = (1 << 24) - 1,
+		.min = 0, .max = (1 << 24) - 1,
+	},
+	/* segment 3 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_REUSE_LAST |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = (1 << 24) - 1, .end = 1 << 24,
+		.min = 0, .max = 1 << 24,
+	},
+	/* Segment 4 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_REUSE_LAST |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = 1 << 24, .end = 3 << 24,
+		.min = 0, .max = (3 << 24),
+	},
+	/* Segment 5 */
+	{
+		.flags = (DRM_MODE_LUT_REFLECT_NEGATIVE |
+				DRM_MODE_LUT_INTERPOLATE |
+				DRM_MODE_LUT_REUSE_LAST |
+				DRM_MODE_LUT_NON_DECREASING),
+		.count = 1,
+		.input_bpc = 24, .output_bpc = 16,
+		.start = 3 << 24, .end = 7 << 24,
+		.min = 0, .max = (7 << 24),
+	},
+};
+
 /* TODO: Move to another file */
 struct intel_plane_colorop *intel_colorop_alloc(void)
 {
@@ -3865,6 +3964,11 @@ int intel_plane_tf_pipeline_init(struct drm_plane *plane, struct drm_prop_enum_l
 	if (ret)
 		return ret;
 
+	if (icl_is_hdr_plane(i915, to_intel_plane(plane)->id)) {
+		drm_colorop_lutcaps_init(&colorop->base, plane, xelpd_degamma_hdr,
+					 sizeof(xelpd_degamma_hdr));
+	}
+
 	list->type = colorop->base.base.id;
 	list->name = kasprintf(GFP_KERNEL, "Color Pipeline %d", colorop->base.base.id);
 
@@ -3886,6 +3990,11 @@ int intel_plane_tf_pipeline_init(struct drm_plane *plane, struct drm_prop_enum_l
 	if (ret)
 		return ret;
 
+	if (icl_is_hdr_plane(i915, to_intel_plane(plane)->id)) {
+		drm_colorop_lutcaps_init(&colorop->base, plane, xelpd_gamma_hdr,
+					 sizeof(xelpd_gamma_hdr));
+	}
+
 	drm_colorop_set_next_property(prev_op, &colorop->base);
 
 	return 0;
-- 
2.42.0