[v5 04/24] drm: Add 1D LUT multi-segmented color op

[Uma Shankar]

From: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>

Add support for color ops that can be programmed
by 1 dimensional multi segmented Look Up Tables.

v2: Fixed the documentation for Multi segmented lut (Dmitry)

Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
 drivers/gpu/drm/drm_atomic.c      |  4 ++++
 drivers/gpu/drm/drm_atomic_uapi.c |  3 +++
 drivers/gpu/drm/drm_colorop.c     |  1 +
 include/uapi/drm/drm_mode.h       | 10 ++++++++++
 4 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 3ab32fe7fe1c..71160a71f5a3 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -800,6 +800,10 @@ static void drm_atomic_colorop_print_state(struct drm_printer *p,
 			   drm_get_colorop_lut1d_interpolation_name(colorop->lut1d_interpolation));
 		drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
 		break;
+	case DRM_COLOROP_1D_LUT_MULTSEG:
+		drm_printf(p, "\thw cap blob id=%d\n", state->hw_caps ? state->hw_caps->base.id : 0);
+		drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
+		break;
 	case DRM_COLOROP_CTM_3X4:
 		drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
 		break;
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 81a8da09fbfe..c59f6671b73d 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -723,6 +723,9 @@ static int drm_atomic_color_set_data_property(struct drm_colorop *colorop,
 		size = colorop->lut_size * colorop->lut_size * colorop->lut_size *
 		       sizeof(struct drm_color_lut_32);
 		break;
+	case DRM_COLOROP_1D_LUT_MULTSEG:
+		elem_size = sizeof(struct drm_color_lut_32);
+		break;
 	default:
 		/* should never get here */
 		return -EINVAL;
diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index 52c08d717944..97e9acbb0f2c 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -65,6 +65,7 @@
 static const struct drm_prop_enum_list drm_colorop_type_enum_list[] = {
 	{ DRM_COLOROP_1D_CURVE, "1D Curve" },
 	{ DRM_COLOROP_1D_LUT, "1D LUT" },
+	{ DRM_COLOROP_1D_LUT_MULTSEG, "1D LUT Multi Segmented" },
 	{ DRM_COLOROP_CTM_3X4, "3x4 Matrix"},
 	{ DRM_COLOROP_MULTIPLIER, "Multiplier"},
 	{ DRM_COLOROP_3D_LUT, "3D LUT"},
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index dd223077f4e9..18e36cbe10f7 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -915,6 +915,16 @@ enum drm_colorop_type {
 	 */
 	DRM_COLOROP_1D_LUT,
 
+	/**
+	 * @DRM_COLOROP_1D_LUT_MULTSEG:
+	 *
+	 * A 1D LUT with multiple segments to cover the full color range with non-uniformly
+	 * distributed &drm_color_lut entries, packed into a blob via the DATA property.
+	 * The driver's expected LUT size and segmented capabilities are advertised via the
+	 * HW_CAPS property.
+	 */
+	DRM_COLOROP_1D_LUT_MULTSEG,
+
 	/**
 	 * @DRM_COLOROP_CTM_3X4:
 	 *
-- 
2.42.0