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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-08-02 14:56:02 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-08-11 11:48:03 +0300
commitc07dcd61a0e57c6840c23d90cb1beddad7d682a1 (patch)
tree8b30f2db8c5346962c418a4cd817442d8386c066 /include/drm/drm_drv.h
parente4672e55d6f3428ae9f27542e05c891f2af71051 (diff)
downloadlinux-c07dcd61a0e57c6840c23d90cb1beddad7d682a1.tar.xz
drm: Document device unplug infrastructure
While at it, also ocd and give them a consistent drm_dev_ prefix, like the other device instance functionality. Plus move the functions into the right places. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170802115604.12734-3-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/drm/drm_drv.h')
-rw-r--r--include/drm/drm_drv.h22
1 files changed, 20 insertions, 2 deletions
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index 505c91354802..71bbaaec836d 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -30,7 +30,8 @@
#include <linux/list.h>
#include <linux/irqreturn.h>
-struct drm_device;
+#include <drm/drm_device.h>
+
struct drm_file;
struct drm_gem_object;
struct drm_master;
@@ -613,7 +614,24 @@ void drm_dev_unregister(struct drm_device *dev);
void drm_dev_ref(struct drm_device *dev);
void drm_dev_unref(struct drm_device *dev);
void drm_put_dev(struct drm_device *dev);
-void drm_unplug_dev(struct drm_device *dev);
+void drm_dev_unplug(struct drm_device *dev);
+
+/**
+ * drm_dev_is_unplugged - is a DRM device unplugged
+ * @dev: DRM device
+ *
+ * This function can be called to check whether a hotpluggable is unplugged.
+ * Unplugging itself is singalled through drm_dev_unplug(). If a device is
+ * unplugged, these two functions guarantee that any store before calling
+ * drm_dev_unplug() is visible to callers of this function after it completes
+ */
+static inline int drm_dev_is_unplugged(struct drm_device *dev)
+{
+ int ret = atomic_read(&dev->unplugged);
+ smp_rmb();
+ return ret;
+}
+
int drm_dev_set_unique(struct drm_device *dev, const char *name);