[RFC PATCH v4 41/42] drm/colorop: Add mutliplier type

[Harry Wentland]

From: Alex Hung <alex.hung at amd.com>

This introduces a new drm_colorop_type: DRM_COLOROP_MULTIPLIER.

It's a simple multiplier to all pixel values. The value is
specified via a S31.32 fixed point provided via the
"MULTIPLIER" property.

Signed-off-by: Alex Hung <alex.hung at amd.com>
---
 drivers/gpu/drm/drm_atomic.c      |  3 +++
 drivers/gpu/drm/drm_atomic_uapi.c |  4 ++++
 drivers/gpu/drm/drm_colorop.c     | 29 +++++++++++++++++++++++++++--
 include/drm/drm_colorop.h         | 16 ++++++++++++++++
 include/uapi/drm/drm_mode.h       |  1 +
 5 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index f7d51839ca03..af0b6338a55c 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -806,6 +806,9 @@ static void drm_atomic_colorop_print_state(struct drm_printer *p,
 	case DRM_COLOROP_CTM_3X4:
 		drm_printf(p, "\tdata blob id=%d\n", state->data ? state->data->base.id : 0);
 		break;
+	case DRM_COLOROP_MULTIPLIER:
+		drm_printf(p, "\tmultiplier=%u\n", state->multiplier);
+		break;
 	default:
 		break;
 	}
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 6bfe857720cd..b4ecda563728 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -727,6 +727,8 @@ static int drm_atomic_colorop_set_property(struct drm_colorop *colorop,
 		state->bypass = val;
 	} else if (property == colorop->curve_1d_type_property) {
 		state->curve_1d_type = val;
+	} else if (property == colorop->multiplier_property) {
+		state->multiplier = val;
 	} else if (property == colorop->data_property) {
 		return drm_atomic_color_set_data_property(colorop,
 					state, property, val);
@@ -752,6 +754,8 @@ drm_atomic_colorop_get_property(struct drm_colorop *colorop,
 		*val = state->bypass;
 	} else if (property == colorop->curve_1d_type_property) {
 		*val = state->curve_1d_type;
+	} else if (property == colorop->multiplier_property) {
+		*val = state->multiplier;
 	} else if (property == colorop->size_property) {
 		*val = state->size;
 	} else if (property == colorop->data_property) {
diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index 4452eaeeb242..c6cdd743de51 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -35,7 +35,8 @@
 static const struct drm_prop_enum_list drm_colorop_type_enum_list[] = {
 	{ DRM_COLOROP_1D_CURVE, "1D Curve" },
 	{ DRM_COLOROP_1D_LUT, "1D Curve Custom LUT" },
-	{ DRM_COLOROP_CTM_3X4, "3x4 Matrix"}
+	{ DRM_COLOROP_CTM_3X4, "3x4 Matrix"},
+	{ DRM_COLOROP_MULTIPLIER, "Multiplier"},
 };
 
 static const char * const colorop_curve_1d_type_names[] = {
@@ -231,6 +232,29 @@ int drm_colorop_ctm_3x4_init(struct drm_device *dev, struct drm_colorop *colorop
 }
 EXPORT_SYMBOL(drm_colorop_ctm_3x4_init);
 
+int drm_colorop_mult_init(struct drm_device *dev, struct drm_colorop *colorop,
+			      struct drm_plane *plane)
+{
+	struct drm_property *prop;
+	int ret;
+
+	ret = drm_colorop_init(dev, colorop, plane, DRM_COLOROP_MULTIPLIER);
+	if (ret)
+		return ret;
+
+	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, "MULTIPLIER", 0, U64_MAX);
+	if (!prop)
+		return -ENOMEM;
+
+	colorop->multiplier_property = prop;
+	drm_object_attach_property(&colorop->base, colorop->multiplier_property, 0);
+
+	drm_colorop_reset(colorop);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_colorop_mult_init);
+
 static void __drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop,
 							struct drm_colorop_state *state)
 {
@@ -333,7 +357,8 @@ EXPORT_SYMBOL(drm_colorop_reset);
 static const char * const colorop_type_name[] = {
 	[DRM_COLOROP_1D_CURVE] = "1D Curve",
 	[DRM_COLOROP_1D_LUT] = "1D Curve Custom LUT",
-	[DRM_COLOROP_CTM_3X4] = "3x4 Matrix"
+	[DRM_COLOROP_CTM_3X4] = "3x4 Matrix",
+	[DRM_COLOROP_MULTIPLIER] = "Multiplier",
 };
 
 /**
diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index 8adc7ece3bd1..f9f83644cc9f 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -64,6 +64,13 @@ struct drm_colorop_state {
 	 */
 	enum drm_colorop_curve_1d_type curve_1d_type;
 
+	/**
+	 * @multiplier:
+	 *
+	 * Multiplier to 'gain' the plane. Format is S31.32 sign-magnitude.
+	 */
+	uint64_t multiplier;
+
 	/**
 	 * @size:
 	 *
@@ -186,6 +193,13 @@ struct drm_colorop {
 	 */
 	struct drm_property *curve_1d_type_property;
 
+	/**
+	 * @multiplier_property:
+	 *
+	 * Multiplier property for plane gain
+	 */
+	struct drm_property *multiplier_property;
+
 	/**
 	 * @size_property:
 	 *
@@ -246,6 +260,8 @@ int drm_colorop_curve_1d_lut_init(struct drm_device *dev, struct drm_colorop *co
 				  struct drm_plane *plane, uint32_t lut_size);
 int drm_colorop_ctm_3x4_init(struct drm_device *dev, struct drm_colorop *colorop,
 			     struct drm_plane *plane);
+int drm_colorop_mult_init(struct drm_device *dev, struct drm_colorop *colorop,
+			      struct drm_plane *plane);
 
 struct drm_colorop_state *
 drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 07fd66dc477c..754fd4c48123 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -876,6 +876,7 @@ enum drm_colorop_type {
 	DRM_COLOROP_1D_CURVE,
 	DRM_COLOROP_1D_LUT,
 	DRM_COLOROP_CTM_3X4,
+	DRM_COLOROP_MULTIPLIER,
 };
 
 /**
-- 
2.44.0