1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_sprite_uapi.c b/drivers/gpu/drm/i915/display/intel_sprite_uapi.c
new file mode 100644
index 000000000000..70a391083751
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_sprite_uapi.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#include "i915_drv.h"
+#include "intel_crtc.h"
+#include "intel_display_types.h"
+#include "intel_sprite_uapi.h"
+
+static bool has_dst_key_in_primary_plane(struct drm_i915_private *dev_priv)
+{
+	return DISPLAY_VER(dev_priv) >= 9;
+}
+
+static void intel_plane_set_ckey(struct intel_plane_state *plane_state,
+				 const struct drm_intel_sprite_colorkey *set)
+{
+	struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
+
+	*key = *set;
+
+	/*
+	 * We want src key enabled on the
+	 * sprite and not on the primary.
+	 */
+	if (plane->id == PLANE_PRIMARY &&
+	    set->flags & I915_SET_COLORKEY_SOURCE)
+		key->flags = 0;
+
+	/*
+	 * On SKL+ we want dst key enabled on
+	 * the primary and not on the sprite.
+	 */
+	if (DISPLAY_VER(dev_priv) >= 9 && plane->id != PLANE_PRIMARY &&
+	    set->flags & I915_SET_COLORKEY_DESTINATION)
+		key->flags = 0;
+}
+
+int intel_sprite_set_colorkey_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *file_priv)
+{
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_intel_sprite_colorkey *set = data;
+	struct drm_plane *plane;
+	struct drm_plane_state *plane_state;
+	struct drm_atomic_state *state;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret = 0;
+
+	/* ignore the pointless "none" flag */
+	set->flags &= ~I915_SET_COLORKEY_NONE;
+
+	if (set->flags & ~(I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
+		return -EINVAL;
+
+	/* Make sure we don't try to enable both src & dest simultaneously */
+	if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
+		return -EINVAL;
+
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	    set->flags & I915_SET_COLORKEY_DESTINATION)
+		return -EINVAL;
+
+	plane = drm_plane_find(dev, file_priv, set->plane_id);
+	if (!plane || plane->type != DRM_PLANE_TYPE_OVERLAY)
+		return -ENOENT;
+
+	/*
+	 * SKL+ only plane 2 can do destination keying against plane 1.
+	 * Also multiple planes can't do destination keying on the same
+	 * pipe simultaneously.
+	 */
+	if (DISPLAY_VER(dev_priv) >= 9 &&
+	    to_intel_plane(plane)->id >= PLANE_SPRITE1 &&
+	    set->flags & I915_SET_COLORKEY_DESTINATION)
+		return -EINVAL;
+
+	drm_modeset_acquire_init(&ctx, 0);
+
+	state = drm_atomic_state_alloc(plane->dev);
+	if (!state) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	state->acquire_ctx = &ctx;
+
+	while (1) {
+		plane_state = drm_atomic_get_plane_state(state, plane);
+		ret = PTR_ERR_OR_ZERO(plane_state);
+		if (!ret)
+			intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
+
+		/*
+		 * On some platforms we have to configure
+		 * the dst colorkey on the primary plane.
+		 */
+		if (!ret && has_dst_key_in_primary_plane(dev_priv)) {
+			struct intel_crtc *crtc =
+				intel_crtc_for_pipe(dev_priv,
+						    to_intel_plane(plane)->pipe);
+
+			plane_state = drm_atomic_get_plane_state(state,
+								 crtc->base.primary);
+			ret = PTR_ERR_OR_ZERO(plane_state);
+			if (!ret)
+				intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
+		}
+
+		if (!ret)
+			ret = drm_atomic_commit(state);
+
+		if (ret != -EDEADLK)
+			break;
+
+		drm_atomic_state_clear(state);
+		drm_modeset_backoff(&ctx);
+	}
+
+	drm_atomic_state_put(state);
+out:
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+	return ret;
+}