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

This takes a reference count when fbdev adds the connector,
and drops it when it removes the connector.

It also drops the now unneeded code to find connectors
and remove the from the modeset as they are reference counted.

v2: drop references when removing all connectors at end.

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 11:24:51 +10:00
parent b164d31f50
commit 6e86d58be3
1 changed files with 5 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/gpu/drm/drm_fb_helper.c
View File

@ -162,40 +162,13 @@ int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_
if (!fb_helper_connector)
return -ENOMEM;
drm_connector_reference(connector);
fb_helper_connector->connector = connector;
fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_add_one_connector);
static void remove_from_modeset(struct drm_mode_set *set,
struct drm_connector *connector)
{
int i, j;
for (i = 0; i < set->num_connectors; i++) {
if (set->connectors[i] == connector)
break;
}
if (i == set->num_connectors)
return;
for (j = i + 1; j < set->num_connectors; j++) {
set->connectors[j - 1] = set->connectors[j];
}
set->num_connectors--;
/*
* TODO maybe need to makes sure we set it back to !=NULL somewhere?
*/
if (set->num_connectors == 0) {
set->fb = NULL;
drm_mode_destroy(connector->dev, set->mode);
set->mode = NULL;
}
}
int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
struct drm_connector *connector)
{
@ -215,6 +188,7 @@ int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
if (i == fb_helper->connector_count)
return -EINVAL;
fb_helper_connector = fb_helper->connector_info[i];
drm_connector_unreference(fb_helper_connector->connector);
for (j = i + 1; j < fb_helper->connector_count; j++) {
fb_helper->connector_info[j - 1] = fb_helper->connector_info[j];
@ -222,10 +196,6 @@ int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
fb_helper->connector_count--;
kfree(fb_helper_connector);
/* also cleanup dangling references to the connector: */
for (i = 0; i < fb_helper->crtc_count; i++)
remove_from_modeset(&fb_helper->crtc_info[i].mode_set, connector);
return 0;
}
EXPORT_SYMBOL(drm_fb_helper_remove_one_connector);
@ -635,8 +605,10 @@ static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
{
int i;
for (i = 0; i < helper->connector_count; i++)
for (i = 0; i < helper->connector_count; i++) {
drm_connector_unreference(helper->connector_info[i]->connector);
kfree(helper->connector_info[i]);
}
kfree(helper->connector_info);
for (i = 0; i < helper->crtc_count; i++) {
kfree(helper->crtc_info[i].mode_set.connectors);