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[PATCH] drm: Update drm sysfs device handling.
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From: Thomas H. <the...@vm...> - 2009-08-12 08:37:03
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This code wraps the struct device so that the drm class callbacks can
differentiate between different types of drm sysfs devices. It fixes a
case where a struct drm_connecor is cast to a struct drm_minor in the
drm_sysfs[suspend|resume] code.
It also opens up for adding driver-specific device entries to the drm
sysfs class, where the struct device need not be embedded within a
struct drm_minor. A new include "drm_sysfs.h" is added so that drivers
don't need to include the full drmP.h to access this feature.
Signed-off-by: Thomas Hellstrom <the...@vm...>
---
drivers/gpu/drm/drm_sysfs.c | 134 ++++++++++++++++++++++++++++--------------
include/drm/drmP.h | 3 +-
include/drm/drm_crtc.h | 3 +-
include/drm/drm_sysfs.h | 37 ++++++++++++
4 files changed, 130 insertions(+), 47 deletions(-)
create mode 100644 include/drm/drm_sysfs.h
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index adc1794..ba54b4c 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -16,11 +16,13 @@
#include <linux/kdev_t.h>
#include <linux/err.h>
+#include "drm_sysfs.h"
#include "drm_core.h"
#include "drmP.h"
-#define to_drm_minor(d) container_of(d, struct drm_minor, kdev)
-#define to_drm_connector(d) container_of(d, struct drm_connector, kdev)
+#define to_drm_minor(d) container_of(d, struct drm_minor, dsdev)
+#define to_drm_connector(d) container_of(d, struct drm_connector, dsdev)
+#define to_dsdev(d) container_of(d, struct drm_sysfs_device, kdev)
/**
* drm_sysfs_suspend - DRM class suspend hook
@@ -32,13 +34,23 @@
*/
static int drm_sysfs_suspend(struct device *dev, pm_message_t state)
{
- struct drm_minor *drm_minor = to_drm_minor(dev);
- struct drm_device *drm_dev = drm_minor->dev;
-
- if (drm_minor->type == DRM_MINOR_LEGACY &&
- !drm_core_check_feature(drm_dev, DRIVER_MODESET) &&
- drm_dev->driver->suspend)
- return drm_dev->driver->suspend(drm_dev, state);
+ struct drm_sysfs_device *dsdev = to_dsdev(dev);
+
+ BUG_ON(dsdev->type >= DRM_DEVICE_TYPE_NUM);
+ switch (dsdev->type) {
+ case DRM_DEVICE_TYPE_MINOR:
+ {
+ struct drm_minor *drm_minor = to_drm_minor(dsdev);
+ struct drm_device *drm_dev = drm_minor->dev;
+
+ if (drm_minor->type == DRM_MINOR_LEGACY &&
+ !drm_core_check_feature(drm_dev, DRIVER_MODESET) &&
+ drm_dev->driver->suspend)
+ return drm_dev->driver->suspend(drm_dev, state);
+ }
+ default:
+ break;
+ }
return 0;
}
@@ -52,16 +64,38 @@ static int drm_sysfs_suspend(struct device *dev, pm_message_t state)
*/
static int drm_sysfs_resume(struct device *dev)
{
- struct drm_minor *drm_minor = to_drm_minor(dev);
- struct drm_device *drm_dev = drm_minor->dev;
+ struct drm_sysfs_device *dsdev = to_dsdev(dev);
+
+ BUG_ON(dsdev->type >= DRM_DEVICE_TYPE_NUM);
+ switch (dsdev->type) {
+ case DRM_DEVICE_TYPE_MINOR:
+ {
+ struct drm_minor *drm_minor = to_drm_minor(dsdev);
+ struct drm_device *drm_dev = drm_minor->dev;
+
+ if (drm_minor->type == DRM_MINOR_LEGACY &&
+ !drm_core_check_feature(drm_dev, DRIVER_MODESET) &&
+ drm_dev->driver->resume)
+ return drm_dev->driver->resume(drm_dev);
+ }
+ default:
+ break;
+ }
+ return 0;
+}
- if (drm_minor->type == DRM_MINOR_LEGACY &&
- !drm_core_check_feature(drm_dev, DRIVER_MODESET) &&
- drm_dev->driver->resume)
- return drm_dev->driver->resume(drm_dev);
+int drm_sysfs_device_register(struct drm_sysfs_device *dsdev)
+{
+ dsdev->kdev.class = drm_class;
+ return device_register(&dsdev->kdev);
+}
+EXPORT_SYMBOL(drm_sysfs_device_register);
- return 0;
+void drm_sysfs_device_unregister(struct drm_sysfs_device *dsdev)
+{
+ device_unregister(&dsdev->kdev);
}
+EXPORT_SYMBOL(drm_sysfs_device_unregister);
/* Display the version of drm_core. This doesn't work right in current design */
static ssize_t version_show(struct class *dev, char *buf)
@@ -150,7 +184,8 @@ static ssize_t status_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
- struct drm_connector *connector = to_drm_connector(device);
+ struct drm_sysfs_device *dsdev = to_dsdev(device);
+ struct drm_connector *connector = to_drm_connector(dsdev);
enum drm_connector_status status;
status = connector->funcs->detect(connector);
@@ -162,7 +197,8 @@ static ssize_t dpms_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
- struct drm_connector *connector = to_drm_connector(device);
+ struct drm_sysfs_device *dsdev = to_dsdev(device);
+ struct drm_connector *connector = to_drm_connector(dsdev);
struct drm_device *dev = connector->dev;
uint64_t dpms_status;
int ret;
@@ -181,7 +217,8 @@ static ssize_t enabled_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
- struct drm_connector *connector = to_drm_connector(device);
+ struct drm_sysfs_device *dsdev = to_dsdev(device);
+ struct drm_connector *connector = to_drm_connector(dsdev);
return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" :
"disabled");
@@ -191,7 +228,8 @@ static ssize_t edid_show(struct kobject *kobj, struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct device *connector_dev = container_of(kobj, struct device, kobj);
- struct drm_connector *connector = to_drm_connector(connector_dev);
+ struct drm_sysfs_device *dsdev = to_dsdev(connector_dev);
+ struct drm_connector *connector = to_drm_connector(dsdev);
unsigned char *edid;
size_t size;
@@ -217,7 +255,8 @@ static ssize_t modes_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
- struct drm_connector *connector = to_drm_connector(device);
+ struct drm_sysfs_device *dsdev = to_dsdev(device);
+ struct drm_connector *connector = to_drm_connector(dsdev);
struct drm_display_mode *mode;
int written = 0;
@@ -233,7 +272,8 @@ static ssize_t subconnector_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
- struct drm_connector *connector = to_drm_connector(device);
+ struct drm_sysfs_device *dsdev = to_dsdev(device);
+ struct drm_connector *connector = to_drm_connector(dsdev);
struct drm_device *dev = connector->dev;
struct drm_property *prop = NULL;
uint64_t subconnector;
@@ -274,7 +314,8 @@ static ssize_t select_subconnector_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
- struct drm_connector *connector = to_drm_connector(device);
+ struct drm_sysfs_device *dsdev = to_dsdev(device);
+ struct drm_connector *connector = to_drm_connector(dsdev);
struct drm_device *dev = connector->dev;
struct drm_property *prop = NULL;
uint64_t subconnector;
@@ -351,18 +392,18 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
int ret = 0, i, j;
/* We shouldn't get called more than once for the same connector */
- BUG_ON(device_is_registered(&connector->kdev));
+ BUG_ON(device_is_registered(&connector->dsdev.kdev));
- connector->kdev.parent = &dev->primary->kdev;
- connector->kdev.class = drm_class;
- connector->kdev.release = drm_sysfs_device_release;
+ connector->dsdev.type = DRM_DEVICE_TYPE_CONNECTOR;
+ connector->dsdev.kdev.parent = &dev->primary->dsdev.kdev;
+ connector->dsdev.kdev.release = drm_sysfs_device_release;
DRM_DEBUG("adding \"%s\" to sysfs\n",
drm_get_connector_name(connector));
- dev_set_name(&connector->kdev, "card%d-%s",
+ dev_set_name(&connector->dsdev.kdev, "card%d-%s",
dev->primary->index, drm_get_connector_name(connector));
- ret = device_register(&connector->kdev);
+ ret = drm_sysfs_device_register(&connector->dsdev);
if (ret) {
DRM_ERROR("failed to register connector device: %d\n", ret);
@@ -372,7 +413,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
/* Standard attributes */
for (i = 0; i < ARRAY_SIZE(connector_attrs); i++) {
- ret = device_create_file(&connector->kdev, &connector_attrs[i]);
+ ret = device_create_file(&connector->dsdev.kdev,
+ &connector_attrs[i]);
if (ret)
goto err_out_files;
}
@@ -389,7 +431,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
case DRM_MODE_CONNECTOR_Component:
case DRM_MODE_CONNECTOR_TV:
for (i = 0; i < ARRAY_SIZE(connector_attrs_opt1); i++) {
- ret = device_create_file(&connector->kdev, &connector_attrs_opt1[i]);
+ ret = device_create_file(&connector->dsdev.kdev,
+ &connector_attrs_opt1[i]);
if (ret)
goto err_out_files;
}
@@ -398,7 +441,8 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
break;
}
- ret = sysfs_create_bin_file(&connector->kdev.kobj, &edid_attr);
+ ret = sysfs_create_bin_file(&connector->dsdev.kdev.kobj,
+ &edid_attr);
if (ret)
goto err_out_files;
@@ -410,9 +454,9 @@ int drm_sysfs_connector_add(struct drm_connector *connector)
err_out_files:
if (i > 0)
for (j = 0; j < i; j++)
- device_remove_file(&connector->kdev,
+ device_remove_file(&connector->dsdev.kdev,
&connector_attrs[i]);
- device_unregister(&connector->kdev);
+ drm_sysfs_device_unregister(&connector->dsdev);
out:
return ret;
@@ -440,9 +484,9 @@ void drm_sysfs_connector_remove(struct drm_connector *connector)
drm_get_connector_name(connector));
for (i = 0; i < ARRAY_SIZE(connector_attrs); i++)
- device_remove_file(&connector->kdev, &connector_attrs[i]);
- sysfs_remove_bin_file(&connector->kdev.kobj, &edid_attr);
- device_unregister(&connector->kdev);
+ device_remove_file(&connector->dsdev.kdev, &connector_attrs[i]);
+ sysfs_remove_bin_file(&connector->dsdev.kdev.kobj, &edid_attr);
+ drm_sysfs_device_unregister(&connector->dsdev);
}
EXPORT_SYMBOL(drm_sysfs_connector_remove);
@@ -461,7 +505,7 @@ void drm_sysfs_hotplug_event(struct drm_device *dev)
DRM_DEBUG("generating hotplug event\n");
- kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, envp);
+ kobject_uevent_env(&dev->primary->dsdev.kdev.kobj, KOBJ_CHANGE, envp);
}
EXPORT_SYMBOL(drm_sysfs_hotplug_event);
@@ -479,10 +523,10 @@ int drm_sysfs_device_add(struct drm_minor *minor)
int err;
char *minor_str;
- minor->kdev.parent = &minor->dev->pdev->dev;
- minor->kdev.class = drm_class;
- minor->kdev.release = drm_sysfs_device_release;
- minor->kdev.devt = minor->device;
+ minor->dsdev.type = DRM_DEVICE_TYPE_MINOR;
+ minor->dsdev.kdev.parent = &minor->dev->pdev->dev;
+ minor->dsdev.kdev.release = drm_sysfs_device_release;
+ minor->dsdev.kdev.devt = minor->device;
if (minor->type == DRM_MINOR_CONTROL)
minor_str = "controlD%d";
else if (minor->type == DRM_MINOR_RENDER)
@@ -490,9 +534,9 @@ int drm_sysfs_device_add(struct drm_minor *minor)
else
minor_str = "card%d";
- dev_set_name(&minor->kdev, minor_str, minor->index);
+ dev_set_name(&minor->dsdev.kdev, minor_str, minor->index);
- err = device_register(&minor->kdev);
+ err = drm_sysfs_device_register(&minor->dsdev);
if (err) {
DRM_ERROR("device add failed: %d\n", err);
goto err_out;
@@ -513,5 +557,5 @@ err_out:
*/
void drm_sysfs_device_remove(struct drm_minor *minor)
{
- device_unregister(&minor->kdev);
+ drm_sysfs_device_unregister(&minor->dsdev);
}
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index e0f1c1f..f2e4367 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -84,6 +84,7 @@ struct drm_device;
#include "drm_os_linux.h"
#include "drm_hashtab.h"
#include "drm_mm.h"
+#include "drm_sysfs.h"
#define DRM_UT_CORE 0x01
#define DRM_UT_DRIVER 0x02
@@ -884,7 +885,7 @@ struct drm_minor {
int index; /**< Minor device number */
int type; /**< Control or render */
dev_t device; /**< Device number for mknod */
- struct device kdev; /**< Linux device */
+ struct drm_sysfs_device dsdev; /**< Linux device wrapped*/
struct drm_device *dev;
struct proc_dir_entry *proc_root; /**< proc directory entry */
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 5f2cc0c..135b473 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -31,6 +31,7 @@
#include <linux/idr.h>
#include <linux/fb.h>
+#include "drm_sysfs.h"
struct drm_device;
struct drm_mode_set;
@@ -445,7 +446,7 @@ struct drm_encoder {
*/
struct drm_connector {
struct drm_device *dev;
- struct device kdev;
+ struct drm_sysfs_device dsdev;
struct device_attribute *attr;
struct list_head head;
diff --git a/include/drm/drm_sysfs.h b/include/drm/drm_sysfs.h
new file mode 100644
index 0000000..45c6bea
--- /dev/null
+++ b/include/drm/drm_sysfs.h
@@ -0,0 +1,37 @@
+#ifndef _DRM_SYSFS_
+#define _DRM_SYSFS_
+#include <linux/device.h>
+
+/**
+ * drm known device types.
+ * drm doesn't apply the class methods, in particular suspend / resume / pm
+ * to the DRM_DEVICE_TYPE_OTHER device type. The device should
+ * register its own method by defining and pointing to a
+ * linux struct device_type. This way a device can override the class
+ * methods.
+ */
+
+enum drm_sysfs_device_type {
+ DRM_DEVICE_TYPE_MINOR,
+ DRM_DEVICE_TYPE_CONNECTOR,
+ DRM_DEVICE_TYPE_OTHER,
+ DRM_DEVICE_TYPE_NUM
+};
+
+struct drm_sysfs_device {
+ enum drm_sysfs_device_type type;
+ struct device kdev;
+};
+
+/**
+ * Register a device under the drm sysfs class.
+ */
+
+extern int drm_sysfs_device_register(struct drm_sysfs_device *dsdev);
+
+/**
+ * Unregister a device from the drm sysfs class.
+ */
+extern void drm_sysfs_device_unregister(struct drm_sysfs_device *dsdev);
+
+#endif
--
1.6.1.3
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