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drm/modes: add connector reference counting. (v2) 

This uses the previous changes to add reference counts
to drm connector objects.

v2: move fbdev changes to their own patch.
add some kerneldoc

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2016-04-27 11:10:09 +10:00
parent e76d399f21
commit b164d31f50
3 changed files with 72 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/gpu/drm/drm_atomic.c
View File

@ -156,6 +156,7 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state)
state->connector_states[i]);
state->connectors[i] = NULL;
state->connector_states[i] = NULL;
drm_connector_unreference(connector);
}
for (i = 0; i < config->num_crtc; i++) {
@ -932,6 +933,7 @@ drm_atomic_get_connector_state(struct drm_atomic_state *state,
if (!connector_state)
return ERR_PTR(-ENOMEM);
drm_connector_reference(connector);
state->connector_states[index] = connector_state;
state->connectors[index] = connector;
connector_state->state = state;
@ -1622,12 +1624,19 @@ retry:
}
obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
if (!obj || !obj->properties) {
if (!obj) {
ret = -ENOENT;
goto out;
}
if (!obj->properties) {
drm_mode_object_unreference(obj);
ret = -ENOENT;
goto out;
}
if (get_user(count_props, count_props_ptr + copied_objs)) {
drm_mode_object_unreference(obj);
ret = -EFAULT;
goto out;
}
@ -1640,12 +1649,14 @@ retry:
struct drm_property *prop;
if (get_user(prop_id, props_ptr + copied_props)) {
drm_mode_object_unreference(obj);
ret = -EFAULT;
goto out;
}
prop = drm_property_find(dev, prop_id);
if (!prop) {
drm_mode_object_unreference(obj);
ret = -ENOENT;
goto out;
}
@ -1653,13 +1664,16 @@ retry:
if (copy_from_user(&prop_value,
prop_values_ptr + copied_props,
sizeof(prop_value))) {
drm_mode_object_unreference(obj);
ret = -EFAULT;
goto out;
}
ret = atomic_set_prop(state, obj, prop, prop_value);
if (ret)
if (ret) {
drm_mode_object_unreference(obj);
goto out;
}
copied_props++;
}
@ -1670,6 +1684,7 @@ retry:
plane_mask |= (1 << drm_plane_index(plane));
plane->old_fb = plane->fb;
}
drm_mode_object_unreference(obj);
}
if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {

28
drivers/gpu/drm/drm_crtc.c
View File

@ -864,6 +864,16 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
mode->interlace ? " interlaced" : "");
}
static void drm_connector_free(struct kref *kref)
{
struct drm_connector *connector =
container_of(kref, struct drm_connector, base.refcount);
struct drm_device *dev = connector->dev;
drm_mode_object_unregister(dev, &connector->base);
connector->funcs->destroy(connector);
}
/**
* drm_connector_init - Init a preallocated connector
* @dev: DRM device
@ -889,7 +899,9 @@ int drm_connector_init(struct drm_device *dev,
drm_modeset_lock_all(dev);
ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, NULL);
ret = drm_mode_object_get_reg(dev, &connector->base,
DRM_MODE_OBJECT_CONNECTOR,
false, drm_connector_free);
if (ret)
goto out_unlock;
@ -2137,7 +2149,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
mutex_lock(&dev->mode_config.mutex);
connector = drm_connector_find(dev, out_resp->connector_id);
connector = drm_connector_lookup(dev, out_resp->connector_id);
if (!connector) {
ret = -ENOENT;
goto out_unlock;
@ -2221,6 +2233,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out:
drm_modeset_unlock(&dev->mode_config.connection_mutex);
drm_connector_unreference(connector);
out_unlock:
mutex_unlock(&dev->mode_config.mutex);
@ -2865,13 +2878,14 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
}
for (i = 0; i < crtc_req->count_connectors; i++) {
connector_set[i] = NULL;
set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
if (get_user(out_id, &set_connectors_ptr[i])) {
ret = -EFAULT;
goto out;
}
connector = drm_connector_find(dev, out_id);
connector = drm_connector_lookup(dev, out_id);
if (!connector) {
DRM_DEBUG_KMS("Connector id %d unknown\n",
out_id);
@ -2899,6 +2913,12 @@ out:
if (fb)
drm_framebuffer_unreference(fb);
if (connector_set) {
for (i = 0; i < crtc_req->count_connectors; i++) {
if (connector_set[i])
drm_connector_unreference(connector_set[i]);
}
}
kfree(connector_set);
drm_mode_destroy(dev, mode);
drm_modeset_unlock_all(dev);
@ -4989,7 +5009,7 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
property = obj_to_property(prop_obj);
if (!drm_property_change_valid_get(property, arg->value, &ref))
goto out;
goto out_unref;
switch (arg_obj->type) {
case DRM_MODE_OBJECT_CONNECTOR:

32
include/drm/drm_crtc.h
View File

@ -2571,7 +2571,15 @@ static inline struct drm_encoder *drm_encoder_find(struct drm_device *dev,
return mo ? obj_to_encoder(mo) : NULL;
}
static inline struct drm_connector *drm_connector_find(struct drm_device *dev,
/**
* drm_connector_lookup - lookup connector object
* @dev: DRM device
* @id: connector object id
*
* This function looks up the connector object specified by id
* add takes a reference to it.
*/
static inline struct drm_connector *drm_connector_lookup(struct drm_device *dev,
uint32_t id)
{
struct drm_mode_object *mo;
@ -2639,6 +2647,28 @@ static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
return atomic_read(&fb->base.refcount.refcount);
}
/**
* drm_connector_reference - incr the connector refcnt
* @connector: connector
*
* This function increments the connector's refcount.
*/
static inline void drm_connector_reference(struct drm_connector *connector)
{
drm_mode_object_reference(&connector->base);
}
/**
* drm_connector_unreference - unref a connector
* @connector: connector to unref
*
* This function decrements the connector's refcount and frees it if it drops to zero.
*/
static inline void drm_connector_unreference(struct drm_connector *connector)
{
drm_mode_object_unreference(&connector->base);
}
/* Plane list iterator for legacy (overlay only) planes. */
#define drm_for_each_legacy_plane(plane, dev) \
list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \