Introduce the ability to add DRM debugfs files to a list managed by the
connector and, during drm_connector_register(), all added files will be
created at once.
Moreover, introduce some typesafety as struct drm_debugfs_connector_entry
holds a drm_connector instead of a drm_device. So, the drivers can get
a connector object directly from the struct drm_debugfs_connector_entry
in the show() callback.
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
---
drivers/gpu/drm/drm_connector.c | 5 +++++
drivers/gpu/drm/drm_debugfs.c | 35 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_internal.h | 5 +++++
include/drm/drm_connector.h | 15 ++++++++++++++
include/drm/drm_debugfs.h | 26 ++++++++++++++++++++++++
5 files changed, 86 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 8d92777e57dd..c93655bb0edf 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -273,8 +273,10 @@ static int __drm_connector_init(struct drm_device *dev,
INIT_LIST_HEAD(&connector->global_connector_list_entry);
INIT_LIST_HEAD(&connector->probed_modes);
INIT_LIST_HEAD(&connector->modes);
+ INIT_LIST_HEAD(&connector->debugfs_list);
mutex_init(&connector->mutex);
mutex_init(&connector->edid_override_mutex);
+ mutex_init(&connector->debugfs_mutex);
connector->edid_blob_ptr = NULL;
connector->epoch_counter = 0;
connector->tile_blob_ptr = NULL;
@@ -581,6 +583,7 @@ void drm_connector_cleanup(struct drm_connector *connector)
connector->state);
mutex_destroy(&connector->mutex);
+ mutex_destroy(&connector->debugfs_mutex);
memset(connector, 0, sizeof(*connector));
@@ -627,6 +630,8 @@ int drm_connector_register(struct drm_connector *connector)
goto err_debugfs;
}
+ drm_debugfs_connector_init(connector);
+
drm_mode_object_register(connector->dev, &connector->base);
connector->registration_state = DRM_CONNECTOR_REGISTERED;
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
index 23f6ed7b5d68..d9ec1ed5a7ec 100644
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -260,6 +260,17 @@ int drm_debugfs_init(struct drm_minor *minor, int minor_id,
return 0;
}
+void drm_debugfs_connector_init(struct drm_connector *connector)
+{
+ struct drm_minor *minor = connector->dev->primary;
+ struct drm_debugfs_connector_entry *entry, *tmp;
+
+ if (!minor)
+ return;
+
+ drm_create_file_from_list(connector);
+}
+
void drm_debugfs_late_register(struct drm_device *dev)
{
struct drm_minor *minor = dev->primary;
@@ -369,6 +380,30 @@ void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info
}
EXPORT_SYMBOL(drm_debugfs_add_files);
+/**
+ * drm_debugfs_connector_add_file - Add a given file to the DRM connector debugfs file list
+ * @connector: DRM connector object
+ * @name: debugfs file name
+ * @show: show callback
+ * @data: driver-private data, should not be device-specific
+ *
+ * Add a given file entry to the DRM connector debugfs file list to be created on
+ * drm_debugfs_connector_init().
+ */
+void drm_debugfs_connector_add_file(struct drm_connector *connector, const char *name,
+ int (*show)(struct seq_file*, void*), void *data)
+{
+ struct drm_debugfs_connector_entry *entry = drmm_kzalloc(connector->dev,
+ sizeof(*entry),
+ GFP_KERNEL);
+
+ if (!entry)
+ return;
+
+ drm_debugfs_add_file_to_list(connector);
+}
+EXPORT_SYMBOL(drm_debugfs_connector_add_file);
+
static int connector_show(struct seq_file *m, void *data)
{
struct drm_connector *connector = m->private;
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index ed2103ee272c..dd9d7b8b45bd 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -185,6 +185,7 @@ int drm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
#if defined(CONFIG_DEBUG_FS)
int drm_debugfs_init(struct drm_minor *minor, int minor_id,
struct dentry *root);
+void drm_debugfs_connector_init(struct drm_connector *connector);
void drm_debugfs_cleanup(struct drm_minor *minor);
void drm_debugfs_late_register(struct drm_device *dev);
void drm_debugfs_connector_add(struct drm_connector *connector);
@@ -199,6 +200,10 @@ static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
return 0;
}
+static inline void drm_debugfs_connector_init(struct drm_connector *connector)
+{
+}
+
static inline void drm_debugfs_cleanup(struct drm_minor *minor)
{
}
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 9037f1317aee..51340f3162ed 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1720,6 +1720,21 @@ struct drm_connector {
/** @debugfs_entry: debugfs directory for this connector */
struct dentry *debugfs_entry;
+ /**
+ * @debugfs_mutex:
+ *
+ * Protects &debugfs_list access.
+ */
+ struct mutex debugfs_mutex;
+
+ /**
+ * @debugfs_list:
+ *
+ * List of debugfs files to be created by the DRM connector. The files
+ * must be added during drm_connector_register().
+ */
+ struct list_head debugfs_list;
+
/**
* @state:
*
diff --git a/include/drm/drm_debugfs.h b/include/drm/drm_debugfs.h
index 7616f457ce70..c09c82274622 100644
--- a/include/drm/drm_debugfs.h
+++ b/include/drm/drm_debugfs.h
@@ -122,6 +122,23 @@ struct drm_debugfs_entry {
struct list_head list;
};
+/**
+ * struct drm_debugfs_connector_entry - Per-connector debugfs node structure
+ *
+ * This structure represents a debugfs file, as an instantiation of a &struct
+ * drm_debugfs_info on a &struct drm_connector.
+ */
+struct drm_debugfs_connector_entry {
+ /** @connector: &struct drm_connector for this node. */
+ struct drm_connector *connector;
+
+ /** @file: Template for this node. */
+ struct drm_debugfs_info file;
+
+ /** @list: Linked list of all connector nodes. */
+ struct list_head list;
+};
+
#if defined(CONFIG_DEBUG_FS)
void drm_debugfs_create_files(const struct drm_info_list *files,
int count, struct dentry *root,
@@ -134,6 +151,9 @@ void drm_debugfs_add_file(struct drm_device *dev, const char *name,
void drm_debugfs_add_files(struct drm_device *dev,
const struct drm_debugfs_info *files, int count);
+
+void drm_debugfs_connector_add_file(struct drm_connector *connector, const char *name,
+ int (*show)(struct seq_file*, void*), void *data);
#else
static inline void drm_debugfs_create_files(const struct drm_info_list *files,
int count, struct dentry *root,
@@ -155,6 +175,12 @@ static inline void drm_debugfs_add_files(struct drm_device *dev,
const struct drm_debugfs_info *files,
int count)
{}
+
+static inline void drm_debugfs_connector_add_file(struct drm_connector *connector,
+ const char *name,
+ int (*show)(struct seq_file*, void*),
+ void *data)
+{}
#endif
#endif /* _DRM_DEBUGFS_H_ */
--
2.39.0
