[Intel-gfx] [PATCH 03/28] drm/i915: add constant alpha support to sprite ioctl

[Jesse Barnes]

And implement it on ValleyView.

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_reg.h     |    1 +
 drivers/gpu/drm/i915/intel_sprite.c |   11 ++++++++++-
 include/uapi/drm/i915_drm.h         |    1 +
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ce3e6f4..fd55b20 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3266,6 +3266,7 @@
 #define _SPAKEYMAXVAL		0x721a0
 #define _SPATILEOFF		0x721a4
 #define _SPACONSTALPHA		0x721a8
+#define   SP_ALPHA_EN		(1<<31)
 #define _SPAGAMC		0x721f4
 
 #define _SPBCNTR		0x72280
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 74864a1..9563df8 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -171,7 +171,8 @@ vlv_update_colorkey(struct drm_plane *dplane,
 	int plane = intel_plane->plane;
 	u32 sprctl;
 
-	if (key->flags & I915_SET_COLORKEY_DESTINATION)
+	if (!(key->flags &
+	      (I915_SET_COLORKEY_SOURCE | I915_SET_COLORKEY_ALPHA)))
 		return -EINVAL;
 
 	I915_WRITE(SPKEYMINVAL(pipe, plane), key->min_value);
@@ -180,8 +181,16 @@ vlv_update_colorkey(struct drm_plane *dplane,
 
 	sprctl = I915_READ(SPCNTR(pipe, plane));
 	sprctl &= ~SP_SOURCE_KEY;
+
+	if (!(key->flags & I915_SET_COLORKEY_ALPHA))
+		I915_WRITE(SPCONSTALPHA(pipe, plane), 0);
+
 	if (key->flags & I915_SET_COLORKEY_SOURCE)
 		sprctl |= SP_SOURCE_KEY;
+	else if (key->flags & I915_SET_COLORKEY_ALPHA) {
+		I915_WRITE(SPCONSTALPHA(pipe, plane),
+			   SP_ALPHA_EN | key->channel_mask);
+	}
 	I915_WRITE(SPCNTR(pipe, plane), sprctl);
 
 	POSTING_READ(SPKEYMSK(pipe, plane));
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 07d5941..05e61bc 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -949,6 +949,7 @@ struct drm_intel_overlay_attrs {
 #define I915_SET_COLORKEY_NONE		(1<<0) /* disable color key matching */
 #define I915_SET_COLORKEY_DESTINATION	(1<<1)
 #define I915_SET_COLORKEY_SOURCE	(1<<2)
+#define I915_SET_COLORKEY_ALPHA		(1<<3)
 struct drm_intel_sprite_colorkey {
 	__u32 plane_id;
 	__u32 min_value;
-- 
1.7.9.5