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/*
* drm_sysfs.c - Modifications to drm_sysfs_class.c to support
* extra sysfs attribute from DRM. Normal drm_sysfs_class
* does not allow adding attributes.
*
* Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com>
* Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (c) 2003-2004 IBM Corp.
*
* This file is released under the GPLv2
*
*/
#include <linux/device.h>
#include <linux/kdev_t.h>
#include <linux/gfp.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)
static struct device_type drm_sysfs_device_minor = {
.name = "drm_minor"
};
/**
* drm_class_suspend - DRM class suspend hook
* @dev: Linux device to suspend
* @state: power state to enter
*
* Just figures out what the actual struct drm_device associated with
* @dev is and calls its suspend hook, if present.
*/
static int drm_class_suspend(struct device *dev, pm_message_t state)
{
if (dev->type == &drm_sysfs_device_minor) {
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);
}
return 0;
}
/**
* drm_class_resume - DRM class resume hook
* @dev: Linux device to resume
*
* Just figures out what the actual struct drm_device associated with
* @dev is and calls its resume hook, if present.
*/
static int drm_class_resume(struct device *dev)
{
if (dev->type == &drm_sysfs_device_minor) {
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->resume)
return drm_dev->driver->resume(drm_dev);
}
return 0;
}
static char *drm_devnode(struct device *dev, mode_t *mode)
{
return kasprintf(GFP_KERNEL, "dri/%s", dev_name(dev));
}
static CLASS_ATTR_STRING(version, S_IRUGO,
CORE_NAME " "
__stringify(CORE_MAJOR) "."
__stringify(CORE_MINOR) "."
__stringify(CORE_PATCHLEVEL) " "
CORE_DATE);
/**
* drm_sysfs_create - create a struct drm_sysfs_class structure
* @owner: pointer to the module that is to "own" this struct drm_sysfs_class
* @name: pointer to a string for the name of this class.
*
* This is used to create DRM class pointer that can then be used
* in calls to drm_sysfs_device_add().
*
* Note, the pointer created here is to be destroyed when finished by making a
* call to drm_sysfs_destroy().
*/
struct class *drm_sysfs_create(struct module *owner, char *name)
{
struct class *class;
int err;
class = class_create(owner, name);
if (IS_ERR(class)) {
err = PTR_ERR(class);
goto err_out;
}
class->suspend = drm_class_suspend;
class->resume = drm_class_resume;
err = class_create_file(class, &class_attr_version.attr);
if (err)
goto err_out_class;
class->devnode = drm_devnode;
return class;
err_out_class:
class_destroy(class);
err_out:
return ERR_PTR(err);
}
/**
* drm_sysfs_destroy - destroys DRM class
*
* Destroy the DRM device class.
*/
void drm_sysfs_destroy(void)
{
if ((drm_class == NULL) || (IS_ERR(drm_class)))
return;
class_remove_file(drm_class, &class_attr_version.attr);
class_destroy(drm_class);
}
/**
* drm_sysfs_device_release - do nothing
* @dev: Linux device
*
* Normally, this would free the DRM device associated with @dev, along
* with cleaning up any other stuff. But we do that in the DRM core, so
* this function can just return and hope that the core does its job.
*/
static void drm_sysfs_device_release(struct device *dev)
{
memset(dev, 0, sizeof(struct device));
return;
}
/*
* Connector properties
*/
static ssize_t status_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct drm_connector *connector = to_drm_connector(device);
enum drm_connector_status status;
status = connector->funcs->detect(connector);
return snprintf(buf, PAGE_SIZE, "%s\n",
drm_get_connector_status_name(status));
}
static ssize_t dpms_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct drm_connector *connector = to_drm_connector(device);
struct drm_device *dev = connector->dev;
uint64_t dpms_status;
int ret;
ret = drm_connector_property_get_value(connector,
dev->mode_config.dpms_property,
&dpms_status);
if (ret)
return 0;
return snprintf(buf, PAGE_SIZE, "%s\n",
drm_get_dpms_name((int)dpms_status));
}
static ssize_t enabled_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct drm_connector *connector = to_drm_connector(device);
return snprintf(buf, PAGE_SIZE, "%s\n", connector->encoder ? "enabled" :
"disabled");
}
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);
unsigned char *edid;
size_t size;
if (!connector->edid_blob_ptr)
return 0;
edid = connector->edid_blob_ptr->data;
size = connector->edid_blob_ptr->length;
if (!edid)
return 0;
if (off >= size)
return 0;
if (off + count > size)
count = size - off;
memcpy(buf, edid + off, count);
return count;
}
static ssize_t modes_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct drm_connector *connector = to_drm_connector(device);
struct drm_display_mode *mode;
int written = 0;
list_for_each_entry(mode, &connector->modes, head) {
written += snprintf(buf + written, PAGE_SIZE - written, "%s\n",
mode->name);
}
return written;
}
static ssize_t subconnector_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct drm_connector *connector = to_drm_connector(device);
struct drm_device *dev = connector->dev;
struct drm_property *prop = NULL;
uint64_t subconnector;
int is_tv = 0;
int ret;
switch (connector->connector_type) {
case DRM_MODE_CONNECTOR_DVII:
prop = dev->mode_config.dvi_i_subconnector_property;
break;
case DRM_MODE_CONNECTOR_Composite:
case DRM_MODE_CONNECTOR_SVIDEO:
case DRM_MODE_CONNECTOR_Component:
case DRM_MODE_CONNECTOR_TV:
prop = dev->mode_config.tv_subconnector_property;
is_tv = 1;
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