[RFC 06/11] drm: convert plane to properties

[Rob Clark <rob.clark@linaro.org>]

From: Rob Clark <rob@ti.com>

Use atomic properties mechanism to set plane attributes.  This by
itself doesn't accomplish anything, but it avoids having multiple
code paths to do the same thing when nuclear-pageflip and atomic-
modeset are introduced.
---
 drivers/gpu/drm/drm_crtc.c |  257 ++++++++++++++++++++++++++------------------
 include/drm/drm_crtc.h     |   32 ++++--
 2 files changed, 179 insertions(+), 110 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 245c462..81a63fe 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -38,6 +38,9 @@
 #include "drm_edid.h"
 #include "drm_fourcc.h"
 
+static int drm_mode_set_obj_prop(struct drm_mode_object *obj,
+		void *state, struct drm_property *property, uint64_t value);
+
 /* Avoid boilerplate.  I'm tired of typing. */
 #define DRM_ENUM_NAME_FN(fnname, list)				\
 	char *fnname(int val)					\
@@ -380,11 +383,19 @@ EXPORT_SYMBOL(drm_framebuffer_cleanup);
 void drm_framebuffer_remove(struct drm_framebuffer *fb)
 {
 	struct drm_device *dev = fb->dev;
+	struct drm_mode_config *config = &dev->mode_config;
 	struct drm_crtc *crtc;
 	struct drm_plane *plane;
 	struct drm_mode_set set;
+	void *state;
 	int ret;
 
+	state = dev->driver->atomic_begin(dev, NULL);
+	if (IS_ERR(state)) {
+		DRM_ERROR("failed to disable crtc and/or plane when fb was deleted\n");
+		return;
+	}
+
 	/* remove from any CRTC */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		if (crtc->fb == fb) {
@@ -401,15 +412,19 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
 	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 		if (plane->fb == fb) {
 			/* should turn off the crtc */
-			ret = plane->funcs->disable_plane(plane);
-			if (ret)
-				DRM_ERROR("failed to disable plane with busy fb\n");
-			/* disconnect the plane from the fb and crtc: */
-			plane->fb = NULL;
-			plane->crtc = NULL;
+			drm_mode_plane_set_obj_prop(plane, state, config->prop_crtc_id, 0);
+			drm_mode_plane_set_obj_prop(plane, state, config->prop_fb_id, 0);
 		}
 	}
 
+	/* just disabling stuff shouldn't fail, hopefully: */
+	if(dev->driver->atomic_check(dev, state))
+		DRM_ERROR("failed to disable crtc and/or plane when fb was deleted\n");
+	else
+		dev->driver->atomic_commit(dev, state, NULL);
+
+	dev->driver->atomic_end(dev, state);
+
 	list_del(&fb->filp_head);
 
 	drm_framebuffer_unreference(fb);
@@ -663,6 +678,7 @@ int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
 		   const uint32_t *formats, uint32_t format_count,
 		   bool priv)
 {
+	struct drm_mode_config *config = &dev->mode_config;
 	int ret;
 
 	mutex_lock(&dev->mode_config.mutex);
@@ -699,6 +715,17 @@ int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
 		INIT_LIST_HEAD(&plane->head);
 	}
 
+	drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
+	drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
+	drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
+	drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
+	drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
+	drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
+	drm_object_attach_property(&plane->base, config->prop_src_x, 0);
+	drm_object_attach_property(&plane->base, config->prop_src_y, 0);
+	drm_object_attach_property(&plane->base, config->prop_src_w, 0);
+	drm_object_attach_property(&plane->base, config->prop_src_h, 0);
+
  out:
 	mutex_unlock(&dev->mode_config.mutex);
 
@@ -772,23 +799,91 @@ void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
 }
 EXPORT_SYMBOL(drm_mode_destroy);
 
-static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
+static int drm_mode_create_standard_properties(struct drm_device *dev)
 {
-	struct drm_property *edid;
-	struct drm_property *dpms;
+	struct drm_property *prop;
 
 	/*
 	 * Standard properties (apply to all connectors)
 	 */
-	edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
+	prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
 				   DRM_MODE_PROP_IMMUTABLE,
 				   "EDID", 0);
-	dev->mode_config.edid_property = edid;
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.edid_property = prop;
 
-	dpms = drm_property_create_enum(dev, 0,
+	prop = drm_property_create_enum(dev, 0,
 				   "DPMS", drm_dpms_enum_list,
 				   ARRAY_SIZE(drm_dpms_enum_list));
-	dev->mode_config.dpms_property = dpms;
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.dpms_property = prop;
+
+
+	/* TODO we need the driver to control which of these are dynamic
+	 * and which are not..  or maybe we should just set all to zero
+	 * and let the individual drivers frob the prop->flags for the
+	 * properties they can support dynamic changes on..
+	 */
+
+	prop = drm_property_create_range(dev, DRM_MODE_PROP_DYNAMIC,
+			"src_x", 0, UINT_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_src_x = prop;
+
+	prop = drm_property_create_range(dev, DRM_MODE_PROP_DYNAMIC,
+			"src_y", 0, UINT_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_src_y = prop;
+
+	prop = drm_property_create_range(dev, 0, "src_w", 0, UINT_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_src_w = prop;
+
+	prop = drm_property_create_range(dev, 0, "src_h", 0, UINT_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_src_h = prop;
+
+	prop = drm_property_create_range(dev,
+			DRM_MODE_PROP_DYNAMIC | DRM_MODE_PROP_SIGNED,
+			"crtc_x", I642U64(INT_MIN), I642U64(INT_MAX));
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_crtc_x = prop;
+
+	prop = drm_property_create_range(dev,
+			DRM_MODE_PROP_DYNAMIC | DRM_MODE_PROP_SIGNED,
+			"crtc_y", I642U64(INT_MIN), I642U64(INT_MAX));
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_crtc_y = prop;
+
+	prop = drm_property_create_range(dev, 0, "crtc_w", 0, INT_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_crtc_w = prop;
+
+	prop = drm_property_create_range(dev, 0, "crtc_h", 0, INT_MAX);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_crtc_h = prop;
+
+	prop = drm_property_create_object(dev, DRM_MODE_PROP_DYNAMIC,
+			"fb", DRM_MODE_OBJECT_FB);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_fb_id = prop;
+
+	prop = drm_property_create_object(dev, 0,
+			"crtc", DRM_MODE_OBJECT_CRTC);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.prop_crtc_id = prop;
 
 	return 0;
 }
@@ -1003,7 +1098,7 @@ void drm_mode_config_init(struct drm_device *dev)
 	idr_init(&dev->mode_config.crtc_idr);
 
 	mutex_lock(&dev->mode_config.mutex);
-	drm_mode_create_standard_connector_properties(dev);
+	drm_mode_create_standard_properties(dev);
 	mutex_unlock(&dev->mode_config.mutex);
 
 	/* Just to be sure */
@@ -1750,116 +1845,71 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
 			struct drm_file *file_priv)
 {
 	struct drm_mode_set_plane *plane_req = data;
+	struct drm_mode_config *config = &dev->mode_config;
 	struct drm_mode_object *obj;
-	struct drm_plane *plane;
-	struct drm_crtc *crtc;
-	struct drm_framebuffer *fb;
+	void *state;
 	int ret = 0;
-	unsigned int fb_width, fb_height;
-	int i;
 
 	if (!drm_core_check_feature(dev, DRIVER_MODESET))
 		return -EINVAL;
 
 	mutex_lock(&dev->mode_config.mutex);
 
-	/*
-	 * First, find the plane, crtc, and fb objects.  If not available,
-	 * we don't bother to call the driver.
-	 */
-	obj = drm_mode_object_find(dev, plane_req->plane_id,
-				   DRM_MODE_OBJECT_PLANE);
-	if (!obj) {
-		DRM_DEBUG_KMS("Unknown plane ID %d\n",
-			      plane_req->plane_id);
-		ret = -ENOENT;
-		goto out;
-	}
-	plane = obj_to_plane(obj);
-
-	/* No fb means shut it down */
-	if (!plane_req->fb_id) {
-		plane->funcs->disable_plane(plane);
-		plane->crtc = NULL;
-		plane->fb = NULL;
-		goto out;
-	}
-
 	obj = drm_mode_object_find(dev, plane_req->crtc_id,
 				   DRM_MODE_OBJECT_CRTC);
 	if (!obj) {
-		DRM_DEBUG_KMS("Unknown crtc ID %d\n",
+		DRM_DEBUG_KMS("Unknown CRTC ID %d\n",
 			      plane_req->crtc_id);
 		ret = -ENOENT;
-		goto out;
+		goto out_unlock;
 	}
-	crtc = obj_to_crtc(obj);
 
-	obj = drm_mode_object_find(dev, plane_req->fb_id,
-				   DRM_MODE_OBJECT_FB);
-	if (!obj) {
-		DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
-			      plane_req->fb_id);
-		ret = -ENOENT;
-		goto out;
+	state = dev->driver->atomic_begin(dev, obj_to_crtc(obj));
+	if (IS_ERR(state)) {
+		ret = PTR_ERR(state);
+		goto out_unlock;
 	}
-	fb = obj_to_fb(obj);
 
-	/* Check whether this plane supports the fb pixel format. */
-	for (i = 0; i < plane->format_count; i++)
-		if (fb->pixel_format == plane->format_types[i])
-			break;
-	if (i == plane->format_count) {
-		DRM_DEBUG_KMS("Invalid pixel format 0x%08x\n", fb->pixel_format);
-		ret = -EINVAL;
+	obj = drm_mode_object_find(dev, plane_req->plane_id,
+				   DRM_MODE_OBJECT_PLANE);
+	if (!obj) {
+		DRM_DEBUG_KMS("Unknown plane ID %d\n",
+			      plane_req->plane_id);
+		ret = -ENOENT;
 		goto out;
 	}
 
-	fb_width = fb->width << 16;
-	fb_height = fb->height << 16;
-
-	/* Make sure source coordinates are inside the fb. */
-	if (plane_req->src_w > fb_width ||
-	    plane_req->src_x > fb_width - plane_req->src_w ||
-	    plane_req->src_h > fb_height ||
-	    plane_req->src_y > fb_height - plane_req->src_h) {
-		DRM_DEBUG_KMS("Invalid source coordinates "
-			      "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
-			      plane_req->src_w >> 16,
-			      ((plane_req->src_w & 0xffff) * 15625) >> 10,
-			      plane_req->src_h >> 16,
-			      ((plane_req->src_h & 0xffff) * 15625) >> 10,
-			      plane_req->src_x >> 16,
-			      ((plane_req->src_x & 0xffff) * 15625) >> 10,
-			      plane_req->src_y >> 16,
-			      ((plane_req->src_y & 0xffff) * 15625) >> 10);
-		ret = -ENOSPC;
-		goto out;
-	}
+	ret =
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_crtc_id, plane_req->crtc_id) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_fb_id, plane_req->fb_id) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_crtc_x, I642U64(plane_req->crtc_x)) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_crtc_y, I642U64(plane_req->crtc_y)) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_crtc_w, plane_req->crtc_w) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_crtc_h, plane_req->crtc_h) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_src_w, plane_req->src_w) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_src_h, plane_req->src_h) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_src_x, plane_req->src_x) ||
+		drm_mode_set_obj_prop(obj, state,
+				config->prop_src_y, plane_req->src_y) ||
+		dev->driver->atomic_check(dev, state);
 
-	/* Give drivers some help against integer overflows */
-	if (plane_req->crtc_w > INT_MAX ||
-	    plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
-	    plane_req->crtc_h > INT_MAX ||
-	    plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
-		DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
-			      plane_req->crtc_w, plane_req->crtc_h,
-			      plane_req->crtc_x, plane_req->crtc_y);
-		ret = -ERANGE;
+	if (ret)
 		goto out;
-	}
 
-	ret = plane->funcs->update_plane(plane, crtc, fb,
-					 plane_req->crtc_x, plane_req->crtc_y,
-					 plane_req->crtc_w, plane_req->crtc_h,
-					 plane_req->src_x, plane_req->src_y,
-					 plane_req->src_w, plane_req->src_h);
-	if (!ret) {
-		plane->crtc = crtc;
-		plane->fb = fb;
-	}
+	ret = dev->driver->atomic_commit(dev, state, NULL);
 
 out:
+	dev->driver->atomic_end(dev, state);
+out_unlock:
 	mutex_unlock(&dev->mode_config.mutex);
 
 	return ret;
@@ -3262,7 +3312,7 @@ int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
 	return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
 }
 
-static int drm_mode_connector_set_obj_prop(struct drm_connector *connector,
+int drm_mode_connector_set_obj_prop(struct drm_connector *connector,
 					   void *state, struct drm_property *property,
 					   uint64_t value)
 {
@@ -3283,8 +3333,9 @@ static int drm_mode_connector_set_obj_prop(struct drm_connector *connector,
 
 	return ret;
 }
+EXPORT_SYMBOL(drm_mode_connector_set_obj_prop);
 
-static int drm_mode_crtc_set_obj_prop(struct drm_crtc *crtc,
+int drm_mode_crtc_set_obj_prop(struct drm_crtc *crtc,
 				      void *state, struct drm_property *property,
 				      uint64_t value)
 {
@@ -3298,8 +3349,9 @@ static int drm_mode_crtc_set_obj_prop(struct drm_crtc *crtc,
 
 	return ret;
 }
+EXPORT_SYMBOL(drm_mode_crtc_set_obj_prop);
 
-static int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
+int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
 				      void *state, struct drm_property *property,
 				      uint64_t value)
 {
@@ -3313,6 +3365,7 @@ static int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
 
 	return ret;
 }
+EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
 
 static int drm_mode_set_obj_prop(struct drm_mode_object *obj,
 		void *state, struct drm_property *property, uint64_t value)
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index b5f71f8..c61b6a1 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -634,13 +634,6 @@ struct drm_connector {
  * @set_property: called when a property is changed
  */
 struct drm_plane_funcs {
-	int (*update_plane)(struct drm_plane *plane,
-			    struct drm_crtc *crtc, struct drm_framebuffer *fb,
-			    int crtc_x, int crtc_y,
-			    unsigned int crtc_w, unsigned int crtc_h,
-			    uint32_t src_x, uint32_t src_y,
-			    uint32_t src_w, uint32_t src_h);
-	int (*disable_plane)(struct drm_plane *plane);
 	void (*destroy)(struct drm_plane *plane);
 
 	int (*set_property)(struct drm_plane *plane, void *state,
@@ -810,8 +803,20 @@ struct drm_mode_config {
 	bool poll_enabled;
 	struct delayed_work output_poll_work;
 
-	/* pointers to standard properties */
+	/* just so blob properties can always be in a list: */
 	struct list_head property_blob_list;
+
+	/* pointers to standard properties */
+	struct drm_property *prop_src_x;
+	struct drm_property *prop_src_y;
+	struct drm_property *prop_src_w;
+	struct drm_property *prop_src_h;
+	struct drm_property *prop_crtc_x;
+	struct drm_property *prop_crtc_y;
+	struct drm_property *prop_crtc_w;
+	struct drm_property *prop_crtc_h;
+	struct drm_property *prop_fb_id;
+	struct drm_property *prop_crtc_id;
 	struct drm_property *edid_property;
 	struct drm_property *dpms_property;
 
@@ -947,6 +952,17 @@ extern int drm_object_property_set_value(struct drm_mode_object *obj,
 extern int drm_object_property_get_value(struct drm_mode_object *obj,
 					 struct drm_property *property,
 					 uint64_t *value);
+
+int drm_mode_connector_set_obj_prop(struct drm_connector *connector,
+					   void *state, struct drm_property *property,
+					   uint64_t value);
+int drm_mode_crtc_set_obj_prop(struct drm_crtc *crtc,
+				      void *state, struct drm_property *property,
+				      uint64_t value);
+int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
+				      void *state, struct drm_property *property,
+				      uint64_t value);
+
 extern int drm_framebuffer_init(struct drm_device *dev,
 				struct drm_framebuffer *fb,
 				const struct drm_framebuffer_funcs *funcs);
-- 
1.7.9.5