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drm: add object property type

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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>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Rob Clark
2014-05-30 11:37:03 -04:00
committed by Dave Airlie
parent 5ea22f24d7
commit 98f75de40e
3 changed files with 60 additions and 7 deletions
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61
drivers/gpu/drm/drm_crtc.c
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@@ -370,6 +370,21 @@ void drm_mode_object_put(struct drm_device *dev,
mutex_unlock(&dev->mode_config.idr_mutex);
}
static struct drm_mode_object *_object_find(struct drm_device *dev,
uint32_t id, uint32_t type)
{
struct drm_mode_object *obj = NULL;
mutex_lock(&dev->mode_config.idr_mutex);
obj = idr_find(&dev->mode_config.crtc_idr, id);
if (!obj || (type != DRM_MODE_OBJECT_ANY && obj->type != type) ||
(obj->id != id))
obj = NULL;
mutex_unlock(&dev->mode_config.idr_mutex);
return obj;
}
/**
* drm_mode_object_find - look up a drm object with static lifetime
* @dev: drm device
@@ -377,7 +392,9 @@ void drm_mode_object_put(struct drm_device *dev,
* @type: type of the mode object
*
* Note that framebuffers cannot be looked up with this functions - since those
* are reference counted, they need special treatment.
* are reference counted, they need special treatment. Even with
* DRM_MODE_OBJECT_ANY (although that will simply return NULL
* rather than WARN_ON()).
*/
struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
uint32_t id, uint32_t type)
@@ -387,13 +404,10 @@ struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
/* Framebuffers are reference counted and need their own lookup
* function.*/
WARN_ON(type == DRM_MODE_OBJECT_FB);
mutex_lock(&dev->mode_config.idr_mutex);
obj = idr_find(&dev->mode_config.crtc_idr, id);
if (!obj || (obj->type != type) || (obj->id != id))
obj = _object_find(dev, id, type);
/* don't leak out unref'd fb's */
if (obj && (obj->type == DRM_MODE_OBJECT_FB))
obj = NULL;
mutex_unlock(&dev->mode_config.idr_mutex);
return obj;
}
EXPORT_SYMBOL(drm_mode_object_find);
@@ -3074,6 +3088,8 @@ 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)
@@ -3234,6 +3250,23 @@ 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
@@ -3661,6 +3694,20 @@ static bool drm_property_change_is_valid(struct drm_property *property,
} 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)) {
struct drm_mode_object *obj;
/* a zero value for an object property translates to null: */
if (value == 0)
return true;
/*
* NOTE: use _object_find() directly to bypass restriction on
* looking up refcnt'd objects (ie. fb's). For a refcnt'd
* object this could race against object finalization, so it
* simply tells us that the object *was* valid. Which is good
* enough.
*/
obj = _object_find(property->dev, value, property->values[0]);
return obj != NULL;
} else {
int i;
for (i = 0; i < property->num_values; i++)