From: Damien Lespiau <damien.lespiau@intel.com>

Add blend color property and update the
documentation for the same

V2: Add blend color support in get property.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: vandita kulkarni <vandita.kulkarni@intel.com>
---
 Documentation/DocBook/gpu.tmpl | 11 +++++++++--
 drivers/gpu/drm/drm_atomic.c   |  4 ++++
 drivers/gpu/drm/drm_crtc.c     |  5 +++++
 include/drm/drm_crtc.h         |  6 ++++++
 4 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/Documentation/DocBook/gpu.tmpl b/Documentation/DocBook/gpu.tmpl
index f673989..8572c9a 100644
--- a/Documentation/DocBook/gpu.tmpl
+++ b/Documentation/DocBook/gpu.tmpl
@@ -1816,7 +1816,7 @@ void intel_crt_init(struct drm_device *dev)
 	<td valign="top" >Description/Restrictions</td>
 	</tr>
 	<tr>
-	<td rowspan="43" valign="top" >DRM</td>
+	<td rowspan="44" valign="top" >DRM</td>
 	<td valign="top" >Generic</td>
 	<td valign="top" >“rotation”</td>
 	<td valign="top" >BITMASK</td>
@@ -1868,7 +1868,7 @@ void intel_crt_init(struct drm_device *dev)
 	<td valign="top" >CRTC that connector is attached to (atomic)</td>
 	</tr>
 	<tr>
-	<td rowspan="12" valign="top" >Plane</td>
+	<td rowspan="13" valign="top" >Plane</td>
 	<td valign="top" >“type”</td>
 	<td valign="top" >ENUM | IMMUTABLE</td>
 	<td valign="top" >{ "Overlay", "Primary", "Cursor" }</td>
@@ -1953,6 +1953,13 @@ void intel_crt_init(struct drm_device *dev)
 	<td valign="top" >Source and destination blending factors</td>
 	</tr>
 	<tr>
+	<td valign="top" >“blend_color”</td>
+	<td valign="top" >Color</td>
+	<td valign="top" >DRM_MODE_COLOR()</td>
+	<td valign="top" >Plane</td>
+	<td valign="top" >Blend constant color</td>
+	</tr>
+	<tr>
 	<td rowspan="2" valign="top" >DVI-I</td>
 	<td valign="top" >“subconnector”</td>
 	<td valign="top" >ENUM</td>
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index c2ead2d..20340de 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -713,6 +713,8 @@ int drm_atomic_plane_set_property(struct drm_plane *plane,
 			return -EINVAL;
 
 		state->blend_mode.func = val & GENMASK(31, 0);
+	} else if (property == config->prop_blend_color) {
+		state->blend_mode.color = val;
 	} else if (plane->funcs->atomic_set_property) {
 		return plane->funcs->atomic_set_property(plane, state,
 				property, val);
@@ -771,6 +773,8 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
 		*val = state->rotation;
 	} else if (property == config->prop_blend_func) {
 		*val = state->blend_mode.func;
+	} else if (property == config->prop_blend_color) {
+		*val = state->blend_mode.color;
 	} else if (plane->funcs->atomic_get_property) {
 		return plane->funcs->atomic_get_property(plane, state, property, val);
 	} else {
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 2cac5e1..65cbaea 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1592,6 +1592,11 @@ static int drm_mode_create_standard_properties(struct drm_device *dev)
 		return -ENOMEM;
 	dev->mode_config.prop_blend_func = prop;
 
+	prop = drm_property_create_range(dev, 0, "blend_color", 0, U64_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_blend_color = prop;
+
 	return 0;
 }
 
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 269f660..33d5845 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -95,6 +95,10 @@ enum drm_blend_factor {
 	DRM_BLEND_FACTOR_ONE,
 	DRM_BLEND_FACTOR_SRC_ALPHA,
 	DRM_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA,
+	DRM_BLEND_FACTOR_CONSTANT_ALPHA,
+	DRM_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA,
+	DRM_BLEND_FACTOR_CONSTANT_ALPHA_TIMES_SRC_ALPHA,
+	DRM_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA_TIMES_SRC_ALPHA,
 };
 
 #define DRM_BLEND_FUNC(src_factor, dst_factor)		\
@@ -103,6 +107,7 @@ enum drm_blend_factor {
 #define DRM_BLEND_FUNC_DST_FACTOR(val)	((val) & 0xffff)
 
 struct drm_blend_mode {
+	uint64_t color;
 	uint64_t func;
 };
 
@@ -2145,6 +2150,7 @@ struct drm_mode_config {
 	struct drm_property *prop_active;
 	struct drm_property *prop_mode_id;
 	struct drm_property *prop_blend_func;
+	struct drm_property *prop_blend_color;
 
 	/* DVI-I properties */
 	struct drm_property *dvi_i_subconnector_property;
-- 
1.9.1