drm/vmwgfx: Plane atomic state

Add plane state handling functions.

We have to keep track of a few plane states so we cannot use the
DRM helper for this.

Created vmw_plane_state along with functions to reset, duplicate,
and destroty it.

v2
* Removed cursor clean up special case
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>

drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

@@ -468,6 +468,96 @@ vmw_du_crtc_destroy_state(struct drm_crtc *crtc,
 }
 
 
+/**
+ * vmw_du_plane_duplicate_state - duplicate plane state
+ * @plane: drm plane
+ *
+ * Allocates and returns a copy of the plane state (both common and
+ * vmw-specific) for the specified plane.
+ *
+ * Returns: The newly allocated plane state, or NULL on failure.
+ */
+struct drm_plane_state *
+vmw_du_plane_duplicate_state(struct drm_plane *plane)
+{
+	struct drm_plane_state *state;
+	struct vmw_plane_state *vps;
+
+	vps = kmemdup(plane->state, sizeof(*vps), GFP_KERNEL);
+
+	if (!vps)
+		return NULL;
+
+	vps->pinned = 0;
+
+	/* Each ref counted resource needs to be acquired again */
+	if (vps->surf)
+		(void) vmw_surface_reference(vps->surf);
+
+	if (vps->dmabuf)
+		(void) vmw_dmabuf_reference(vps->dmabuf);
+
+	state = &vps->base;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, state);
+
+	return state;
+}
+
+
+/**
+ * vmw_du_plane_reset - creates a blank vmw plane state
+ * @plane: drm plane
+ *
+ * Resets the atomic state for @plane by freeing the state pointer (which might
+ * be NULL, e.g. at driver load time) and allocating a new empty state object.
+ */
+void vmw_du_plane_reset(struct drm_plane *plane)
+{
+	struct vmw_plane_state *vps;
+
+
+	if (plane->state)
+		vmw_du_plane_destroy_state(plane, plane->state);
+
+	vps = kzalloc(sizeof(*vps), GFP_KERNEL);
+
+	if (!vps) {
+		DRM_ERROR("Cannot allocate vmw_plane_state\n");
+		return;
+	}
+
+	plane->state = &vps->base;
+	plane->state->plane = plane;
+	plane->state->rotation = DRM_ROTATE_0;
+}
+
+
+/**
+ * vmw_du_plane_destroy_state - destroy plane state
+ * @plane: DRM plane
+ * @state: state object to destroy
+ *
+ * Destroys the plane state (both common and vmw-specific) for the
+ * specified plane.
+ */
+void
+vmw_du_plane_destroy_state(struct drm_plane *plane,
+			   struct drm_plane_state *state)
+{
+	struct vmw_plane_state *vps = vmw_plane_state_to_vps(state);
+
+
+	if (vps->surf)
+		vmw_surface_unreference(&vps->surf);
+
+	if (vps->dmabuf)
+		vmw_dmabuf_unreference(&vps->dmabuf);
+
+	drm_atomic_helper_plane_destroy_state(plane, state);
+}
+
+
 /*
  * Generic framebuffer code
  */

drivers/gpu/drm/vmwgfx/vmwgfx_kms.h

@@ -141,6 +141,7 @@ static const uint32_t vmw_cursor_plane_formats[] = {
 
 
 #define vmw_crtc_state_to_vcs(x) container_of(x, struct vmw_crtc_state, base)
+#define vmw_plane_state_to_vps(x) container_of(x, struct vmw_plane_state, base)
 
 
 /**
@@ -152,6 +153,25 @@ struct vmw_crtc_state {
 	struct drm_crtc_state base;
 };
 
+/**
+ * Derived class for plane state object
+ *
+ * @base DRM plane object
+ * @surf Display surface for STDU
+ * @dmabuf display dmabuf for SOU
+ * @content_fb_type Used by STDU.
+ * @pinned pin count for STDU display surface
+ */
+struct vmw_plane_state {
+	struct drm_plane_state base;
+	struct vmw_surface *surf;
+	struct vmw_dma_buffer *dmabuf;
+
+	int content_fb_type;
+
+	int pinned;
+};
+
 /**
  * Base class display unit.
  *
@@ -298,6 +318,10 @@ int vmw_du_cursor_plane_update(struct drm_plane *plane,
 			       uint32_t src_x, uint32_t src_y,
 			       uint32_t src_w, uint32_t src_h);
 
+void vmw_du_plane_reset(struct drm_plane *plane);
+struct drm_plane_state *vmw_du_plane_duplicate_state(struct drm_plane *plane);
+void vmw_du_plane_destroy_state(struct drm_plane *plane,
+				struct drm_plane_state *state);
 void vmw_du_crtc_reset(struct drm_crtc *crtc);
 struct drm_crtc_state *vmw_du_crtc_duplicate_state(struct drm_crtc *crtc);
 void vmw_du_crtc_destroy_state(struct drm_crtc *crtc,

drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

@@ -325,12 +325,18 @@ static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
 	.update_plane = drm_primary_helper_update,
 	.disable_plane = drm_primary_helper_disable,
 	.destroy = vmw_du_primary_plane_destroy,
+	.reset = vmw_du_plane_reset,
+	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
+	.atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
 	.update_plane = vmw_du_cursor_plane_update,
 	.disable_plane = vmw_du_cursor_plane_disable,
 	.destroy = vmw_du_cursor_plane_destroy,
+	.reset = vmw_du_plane_reset,
+	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
+	.atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 
@@ -340,6 +346,7 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 	struct drm_device *dev = dev_priv->dev;
 	struct drm_connector *connector;
 	struct drm_encoder *encoder;
+	struct drm_plane *primary, *cursor;
 	struct drm_crtc *crtc;
 	int ret;
 
@@ -351,6 +358,8 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 	crtc = &ldu->base.crtc;
 	encoder = &ldu->base.encoder;
 	connector = &ldu->base.connector;
+	primary = &ldu->base.primary;
+	cursor = &ldu->base.cursor;
 
 	INIT_LIST_HEAD(&ldu->active);
 
@@ -366,6 +375,8 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 	ldu->base.is_implicit = true;
 
 	/* Initialize primary plane */
+	vmw_du_plane_reset(primary);
+
 	ret = drm_universal_plane_init(dev, &ldu->base.primary,
 				       0, &vmw_ldu_plane_funcs,
 				       vmw_primary_plane_formats,
@@ -377,6 +388,8 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 	}
 
 	/* Initialize cursor plane */
+	vmw_du_plane_reset(cursor);
+
 	ret = drm_universal_plane_init(dev, &ldu->base.cursor,
 			0, &vmw_ldu_cursor_funcs,
 			vmw_cursor_plane_formats,

drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

@@ -506,12 +506,18 @@ static const struct drm_plane_funcs vmw_sou_plane_funcs = {
 	.update_plane = drm_primary_helper_update,
 	.disable_plane = drm_primary_helper_disable,
 	.destroy = vmw_du_primary_plane_destroy,
+	.reset = vmw_du_plane_reset,
+	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
+	.atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 static const struct drm_plane_funcs vmw_sou_cursor_funcs = {
 	.update_plane = vmw_du_cursor_plane_update,
 	.disable_plane = vmw_du_cursor_plane_disable,
 	.destroy = vmw_du_cursor_plane_destroy,
+	.reset = vmw_du_plane_reset,
+	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
+	.atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 
@@ -521,6 +527,7 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 	struct drm_device *dev = dev_priv->dev;
 	struct drm_connector *connector;
 	struct drm_encoder *encoder;
+	struct drm_plane *primary, *cursor;
 	struct drm_crtc *crtc;
 	int ret;
 
@@ -532,6 +539,8 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 	crtc = &sou->base.crtc;
 	encoder = &sou->base.encoder;
 	connector = &sou->base.connector;
+	primary = &sou->base.primary;
+	cursor = &sou->base.cursor;
 
 	sou->base.active_implicit = false;
 	sou->base.pref_active = (unit == 0);
@@ -546,6 +555,8 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 	sou->base.is_implicit = false;
 
 	/* Initialize primary plane */
+	vmw_du_plane_reset(primary);
+
 	ret = drm_universal_plane_init(dev, &sou->base.primary,
 				       0, &vmw_sou_plane_funcs,
 				       vmw_primary_plane_formats,
@@ -557,6 +568,8 @@ static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
 	}
 
 	/* Initialize cursor plane */
+	vmw_du_plane_reset(cursor);
+
 	ret = drm_universal_plane_init(dev, &sou->base.cursor,
 			0, &vmw_sou_cursor_funcs,
 			vmw_cursor_plane_formats,

drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c

@@ -1090,12 +1090,18 @@ static const struct drm_plane_funcs vmw_stdu_plane_funcs = {
 	.update_plane = drm_primary_helper_update,
 	.disable_plane = drm_primary_helper_disable,
 	.destroy = vmw_du_primary_plane_destroy,
+	.reset = vmw_du_plane_reset,
+	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
+	.atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 static const struct drm_plane_funcs vmw_stdu_cursor_funcs = {
 	.update_plane = vmw_du_cursor_plane_update,
 	.disable_plane = vmw_du_cursor_plane_disable,
 	.destroy = vmw_du_cursor_plane_destroy,
+	.reset = vmw_du_plane_reset,
+	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
+	.atomic_destroy_state = vmw_du_plane_destroy_state,
 };
 
 
@@ -1142,6 +1148,8 @@ static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
 	stdu->base.is_implicit = false;
 
 	/* Initialize primary plane */
+	vmw_du_plane_reset(primary);
+
 	ret = drm_universal_plane_init(dev, primary,
 				       0, &vmw_stdu_plane_funcs,
 				       vmw_primary_plane_formats,
@@ -1153,6 +1161,8 @@ static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
 	}
 
 	/* Initialize cursor plane */
+	vmw_du_plane_reset(cursor);
+
 	ret = drm_universal_plane_init(dev, cursor,
 			0, &vmw_stdu_cursor_funcs,
 			vmw_cursor_plane_formats,