[PATCH 1/8] drm: add object property type

28 May 2014

An object property is an id (idr) for a drm mode object.  This
will allow a property to be used set/get a framebuffer, CRTC, etc.
Signed-off-by: Rob Clark robdclark@gmail.com
---
 drivers/gpu/drm/drm_crtc.c  | 50 +++++++++++++++++++++++++++++++++++++--------
 include/drm/drm_crtc.h      | 27 ++++++++++++++++++++++++
 include/uapi/drm/drm_mode.h | 14 +++++++++++++
 3 files changed, 82 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 37a3e07..61ddc66 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3117,6 +3117,8 @@ struct drm_property *drm_property_create(struct drm_device *dev, int flags,
    if (!property)
    	return NULL;
+	property->dev = dev;
+
    if (num_values) {
    	property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
    	if (!property->values)
@@ -3137,6 +3139,9 @@ struct drm_property *drm_property_create(struct drm_device *dev, int flags,
    }
list_add_tail(&property->head, &dev->mode_config.property_list);
+
+	BUG_ON(!drm_property_type_valid(property));
+
    return property;
 fail:
    kfree(property->values);
@@ -3274,6 +3279,23 @@ struct drm_property *drm_property_create_range(struct drm_device *dev, int flags
 }
 EXPORT_SYMBOL(drm_property_create_range);
+struct drm_property *drm_property_create_object(struct drm_device *dev,
+					 int flags, const char *name, uint32_t type)
+{
+	struct drm_property *property;
+
+	flags |= DRM_MODE_PROP_OBJECT;
+
+	property = drm_property_create(dev, flags, name, 1);
+	if (!property)
+		return NULL;
+
+	property->values[0] = type;
+
+	return property;
+}
+EXPORT_SYMBOL(drm_property_create_object);
+
 /**
  * drm_property_add_enum - add a possible value to an enumeration property
  * @property: enumeration property to change
@@ -3294,14 +3316,16 @@ int drm_property_add_enum(struct drm_property *property, int index,
 {
    struct drm_property_enum *prop_enum;
-	if (!(property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
+	if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
+			drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
    	return -EINVAL;
/*
     * Bitmask enum properties have the additional constraint of values
     * from 0 to 63
     */
-	if ((property->flags & DRM_MODE_PROP_BITMASK) && (value > 63))
+	if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
+			(value > 63))
    	return -EINVAL;
if (!list_empty(&property->enum_blob_list)) {
@@ -3484,10 +3508,11 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev,
    }
    property = obj_to_property(obj);
-	if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
+	if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
+			drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
    	list_for_each_entry(prop_enum, &property->enum_blob_list, head)
    		enum_count++;
-	} else if (property->flags & DRM_MODE_PROP_BLOB) {
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
    	list_for_each_entry(prop_blob, &property->enum_blob_list, head)
    		blob_count++;
    }
@@ -3509,7 +3534,8 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev,
    }
    out_resp->count_values = value_count;
-	if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
+	if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
+			drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
    	if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
    		copied = 0;
    		enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
@@ -3531,7 +3557,7 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev,
    	out_resp->count_enum_blobs = enum_count;
    }
-	if (property->flags & DRM_MODE_PROP_BLOB) {
+	if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
    	if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
    		copied = 0;
    		blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr;
@@ -3687,19 +3713,25 @@ static bool drm_property_change_is_valid(struct drm_property *property,
 {
    if (property->flags & DRM_MODE_PROP_IMMUTABLE)
    	return false;
-	if (property->flags & DRM_MODE_PROP_RANGE) {
+
+	if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
    	if (value < property->values[0] || value > property->values[1])
    		return false;
    	return true;
-	} else if (property->flags & DRM_MODE_PROP_BITMASK) {
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
    	int i;
    	uint64_t valid_mask = 0;
    	for (i = 0; i < property->num_values; i++)
    		valid_mask |= (1ULL << property->values[i]);
    	return !(value & ~valid_mask);
-	} else if (property->flags & DRM_MODE_PROP_BLOB) {
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
    	/* Only the driver knows */
    	return true;
+	} else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
+		/* a zero value for an object property translates to null: */
+		if (value == 0)
+			return true;
+		return drm_property_get_obj(property, value) != NULL;
    } else {
    	int i;
    	for (i = 0; i < property->num_values; i++)
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 5c1c31c..c1c243f 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -190,6 +190,7 @@ struct drm_property {
    char name[DRM_PROP_NAME_LEN];
    uint32_t num_values;
    uint64_t *values;
+	struct drm_device *dev;
struct list_head enum_blob_list;
 };
@@ -931,6 +932,23 @@ extern void drm_mode_config_cleanup(struct drm_device *dev);
extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,
    					struct edid *edid);
+
+static inline bool drm_property_type_is(struct drm_property *property,
+		uint32_t type)
+{
+	/* instanceof for props.. handles extended type vs original types: */
+	if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
+		return (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) == type;
+	return property->flags & type;
+}
+
+static inline bool drm_property_type_valid(struct drm_property *property)
+{
+	if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
+		return !(property->flags & DRM_MODE_PROP_LEGACY_TYPE);
+	return !!(property->flags & DRM_MODE_PROP_LEGACY_TYPE);
+}
+
 extern int drm_object_property_set_value(struct drm_mode_object *obj,
    				 struct drm_property *property,
    				 uint64_t val);
@@ -964,6 +982,8 @@ struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
    				 const char *name,
    				 uint64_t min, uint64_t max);
+struct drm_property *drm_property_create_object(struct drm_device *dev,
+					 int flags, const char *name, uint32_t type);
 extern void drm_property_destroy(struct drm_device *dev, struct drm_property *property);
 extern int drm_property_add_enum(struct drm_property *property, int index,
    			 uint64_t value, const char *name);
@@ -980,6 +1000,13 @@ extern int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
    				 int gamma_size);
 extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
    	uint32_t id, uint32_t type);
+
+static inline struct drm_mode_object *
+drm_property_get_obj(struct drm_property *property, uint64_t value)
+{
+	return drm_mode_object_find(property->dev, value, property->values[0]);
+}
+
 /* IOCTLs */
 extern int drm_mode_getresources(struct drm_device *dev,
    			 void *data, struct drm_file *file_priv);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index f104c26..5b530c7 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -251,6 +251,20 @@ struct drm_mode_get_connector {
 #define DRM_MODE_PROP_BLOB	(1<<4)
 #define DRM_MODE_PROP_BITMASK	(1<<5) /* bitmask of enumerated types */
+/* non-extended types: legacy bitmask, one bit per type: */
+#define DRM_MODE_PROP_LEGACY_TYPE  ( \
+		DRM_MODE_PROP_RANGE | \
+		DRM_MODE_PROP_ENUM | \
+		DRM_MODE_PROP_BLOB | \
+		DRM_MODE_PROP_BITMASK)
+
+/* extended-types: rather than continue to consume a bit per type,
+ * grab a chunk of the bits to use as integer type id.
+ */
+#define DRM_MODE_PROP_EXTENDED_TYPE	0x0000ffc0
+#define DRM_MODE_PROP_TYPE(n)		((n) << 6)
+#define DRM_MODE_PROP_OBJECT		DRM_MODE_PROP_TYPE(1)
+
 struct drm_mode_property_enum {
    __u64 value;
    char name[DRM_PROP_NAME_LEN];
-- 
1.9.3


    

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[PATCH 1/8] drm: add object property type