On Fri, May 30, 2014 at 01:12:05PM -0400, Rob Clark wrote:
> 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@xxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> ---
> drivers/gpu/drm/drm_crtc.c | 61 +++++++++++++++++++++++++++++++++++++++------
> include/drm/drm_crtc.h | 5 ++++
> include/uapi/drm/drm_mode.h | 1 +
> 3 files changed, 60 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 0dbd6e0..8fdd5b3 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -389,6 +389,21 @@ 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
> @@ -396,7 +411,9 @@ 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)
> @@ -406,13 +423,10 @@ 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);
> @@ -3093,6 +3107,8 @@ 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)
> @@ -3253,6 +3269,23 @@ 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
> @@ -3680,6 +3713,20 @@ 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++)
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 0ff9558..c63df87 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -50,6 +50,7 @@ struct drm_clip_rect;
> #define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
> #define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
> #define DRM_MODE_OBJECT_BRIDGE 0xbdbdbdbd
> +#define DRM_MODE_OBJECT_ANY 0
>
> struct drm_mode_object {
> uint32_t id;
> @@ -190,6 +191,7 @@ 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;
> };
> @@ -981,6 +983,8 @@ 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);
> @@ -997,6 +1001,7 @@ 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);
> +
> /* 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 a7f546e..5b530c7 100644
> --- a/include/uapi/drm/drm_mode.h
> +++ b/include/uapi/drm/drm_mode.h
> @@ -263,6 +263,7 @@ struct drm_mode_get_connector {
> */
> #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;
> --
> 1.9.3
>
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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