mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-07 00:16:41 +07:00
cbfa9faea1
These attributes should be exposed for the matching connector types only, so checking is redundant. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
654 lines
16 KiB
C
654 lines
16 KiB
C
|
|
/*
|
|
* 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 <linux/export.h>
|
|
|
|
#include <drm/drm_sysfs.h>
|
|
#include <drm/drm_core.h>
|
|
#include <drm/drmP.h>
|
|
#include "drm_internal.h"
|
|
|
|
#define to_drm_minor(d) dev_get_drvdata(d)
|
|
#define to_drm_connector(d) dev_get_drvdata(d)
|
|
|
|
static struct device_type drm_sysfs_device_minor = {
|
|
.name = "drm_minor"
|
|
};
|
|
|
|
/**
|
|
* __drm_class_suspend - internal DRM class suspend routine
|
|
* @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_suspend - internal DRM class suspend hook. Simply calls
|
|
* __drm_class_suspend() with the correct pm state.
|
|
* @dev: Linux device to suspend
|
|
*/
|
|
static int drm_class_suspend(struct device *dev)
|
|
{
|
|
return __drm_class_suspend(dev, PMSG_SUSPEND);
|
|
}
|
|
|
|
/**
|
|
* drm_class_freeze - internal DRM class freeze hook. Simply calls
|
|
* __drm_class_suspend() with the correct pm state.
|
|
* @dev: Linux device to freeze
|
|
*/
|
|
static int drm_class_freeze(struct device *dev)
|
|
{
|
|
return __drm_class_suspend(dev, PMSG_FREEZE);
|
|
}
|
|
|
|
/**
|
|
* 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 const struct dev_pm_ops drm_class_dev_pm_ops = {
|
|
.suspend = drm_class_suspend,
|
|
.resume = drm_class_resume,
|
|
.freeze = drm_class_freeze,
|
|
};
|
|
|
|
static char *drm_devnode(struct device *dev, umode_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->pm = &drm_class_dev_pm_ops;
|
|
|
|
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_class = NULL;
|
|
}
|
|
|
|
/*
|
|
* Connector properties
|
|
*/
|
|
static ssize_t status_store(struct device *device,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct drm_connector *connector = to_drm_connector(device);
|
|
struct drm_device *dev = connector->dev;
|
|
enum drm_connector_status old_status;
|
|
int ret;
|
|
|
|
ret = mutex_lock_interruptible(&dev->mode_config.mutex);
|
|
if (ret)
|
|
return ret;
|
|
|
|
old_status = connector->status;
|
|
|
|
if (sysfs_streq(buf, "detect")) {
|
|
connector->force = 0;
|
|
connector->status = connector->funcs->detect(connector, true);
|
|
} else if (sysfs_streq(buf, "on")) {
|
|
connector->force = DRM_FORCE_ON;
|
|
} else if (sysfs_streq(buf, "on-digital")) {
|
|
connector->force = DRM_FORCE_ON_DIGITAL;
|
|
} else if (sysfs_streq(buf, "off")) {
|
|
connector->force = DRM_FORCE_OFF;
|
|
} else
|
|
ret = -EINVAL;
|
|
|
|
if (ret == 0 && connector->force) {
|
|
if (connector->force == DRM_FORCE_ON ||
|
|
connector->force == DRM_FORCE_ON_DIGITAL)
|
|
connector->status = connector_status_connected;
|
|
else
|
|
connector->status = connector_status_disconnected;
|
|
if (connector->funcs->force)
|
|
connector->funcs->force(connector);
|
|
}
|
|
|
|
if (old_status != connector->status) {
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
|
|
connector->base.id,
|
|
connector->name,
|
|
old_status, connector->status);
|
|
|
|
dev->mode_config.delayed_event = true;
|
|
if (dev->mode_config.poll_enabled)
|
|
schedule_delayed_work(&dev->mode_config.output_poll_work,
|
|
0);
|
|
}
|
|
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t status_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",
|
|
drm_get_connector_status_name(connector->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_object_property_get_value(&connector->base,
|
|
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 file *filp, 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 tv_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;
|
|
uint64_t subconnector;
|
|
int ret;
|
|
|
|
prop = dev->mode_config.tv_subconnector_property;
|
|
if (!prop) {
|
|
DRM_ERROR("Unable to find subconnector property\n");
|
|
return 0;
|
|
}
|
|
|
|
ret = drm_object_property_get_value(&connector->base, prop, &subconnector);
|
|
if (ret)
|
|
return 0;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s",
|
|
drm_get_tv_subconnector_name((int)subconnector));
|
|
}
|
|
|
|
static ssize_t tv_select_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;
|
|
uint64_t subconnector;
|
|
int ret;
|
|
|
|
prop = dev->mode_config.tv_select_subconnector_property;
|
|
if (!prop) {
|
|
DRM_ERROR("Unable to find select subconnector property\n");
|
|
return 0;
|
|
}
|
|
|
|
ret = drm_object_property_get_value(&connector->base, prop, &subconnector);
|
|
if (ret)
|
|
return 0;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s",
|
|
drm_get_tv_select_name((int)subconnector));
|
|
}
|
|
|
|
static ssize_t dvii_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;
|
|
uint64_t subconnector;
|
|
int ret;
|
|
|
|
prop = dev->mode_config.dvi_i_subconnector_property;
|
|
if (!prop) {
|
|
DRM_ERROR("Unable to find subconnector property\n");
|
|
return 0;
|
|
}
|
|
|
|
ret = drm_object_property_get_value(&connector->base, prop, &subconnector);
|
|
if (ret)
|
|
return 0;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s",
|
|
drm_get_dvi_i_subconnector_name((int)subconnector));
|
|
}
|
|
|
|
static ssize_t dvii_select_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;
|
|
uint64_t subconnector;
|
|
int ret;
|
|
|
|
prop = dev->mode_config.dvi_i_select_subconnector_property;
|
|
if (!prop) {
|
|
DRM_ERROR("Unable to find select subconnector property\n");
|
|
return 0;
|
|
}
|
|
|
|
ret = drm_object_property_get_value(&connector->base, prop, &subconnector);
|
|
if (ret)
|
|
return 0;
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s",
|
|
drm_get_dvi_i_select_name((int)subconnector));
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(status);
|
|
static DEVICE_ATTR_RO(enabled);
|
|
static DEVICE_ATTR_RO(dpms);
|
|
static DEVICE_ATTR_RO(modes);
|
|
|
|
static struct attribute *connector_dev_attrs[] = {
|
|
&dev_attr_status.attr,
|
|
&dev_attr_enabled.attr,
|
|
&dev_attr_dpms.attr,
|
|
&dev_attr_modes.attr,
|
|
NULL
|
|
};
|
|
|
|
static DEVICE_ATTR_RO(tv_subconnector);
|
|
static DEVICE_ATTR_RO(tv_select_subconnector);
|
|
|
|
static struct attribute *connector_tv_dev_attrs[] = {
|
|
&dev_attr_tv_subconnector.attr,
|
|
&dev_attr_tv_select_subconnector.attr,
|
|
NULL
|
|
};
|
|
|
|
static DEVICE_ATTR_RO(dvii_subconnector);
|
|
static DEVICE_ATTR_RO(dvii_select_subconnector);
|
|
|
|
static struct attribute *connector_dvii_dev_attrs[] = {
|
|
&dev_attr_dvii_subconnector.attr,
|
|
&dev_attr_dvii_select_subconnector.attr,
|
|
NULL
|
|
};
|
|
|
|
/* Connector type related helpers */
|
|
static int kobj_connector_type(struct kobject *kobj)
|
|
{
|
|
struct device *dev = kobj_to_dev(kobj);
|
|
struct drm_connector *connector = to_drm_connector(dev);
|
|
|
|
return connector->connector_type;
|
|
}
|
|
|
|
static umode_t connector_is_dvii(struct kobject *kobj,
|
|
struct attribute *attr, int idx)
|
|
{
|
|
return kobj_connector_type(kobj) == DRM_MODE_CONNECTOR_DVII ?
|
|
attr->mode : 0;
|
|
}
|
|
|
|
static umode_t connector_is_tv(struct kobject *kobj,
|
|
struct attribute *attr, int idx)
|
|
{
|
|
switch (kobj_connector_type(kobj)) {
|
|
case DRM_MODE_CONNECTOR_Composite:
|
|
case DRM_MODE_CONNECTOR_SVIDEO:
|
|
case DRM_MODE_CONNECTOR_Component:
|
|
case DRM_MODE_CONNECTOR_TV:
|
|
return attr->mode;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bin_attribute edid_attr = {
|
|
.attr.name = "edid",
|
|
.attr.mode = 0444,
|
|
.size = 0,
|
|
.read = edid_show,
|
|
};
|
|
|
|
static struct bin_attribute *connector_bin_attrs[] = {
|
|
&edid_attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group connector_dev_group = {
|
|
.attrs = connector_dev_attrs,
|
|
.bin_attrs = connector_bin_attrs,
|
|
};
|
|
|
|
static const struct attribute_group connector_tv_dev_group = {
|
|
.attrs = connector_tv_dev_attrs,
|
|
.is_visible = connector_is_tv,
|
|
};
|
|
|
|
static const struct attribute_group connector_dvii_dev_group = {
|
|
.attrs = connector_dvii_dev_attrs,
|
|
.is_visible = connector_is_dvii,
|
|
};
|
|
|
|
static const struct attribute_group *connector_dev_groups[] = {
|
|
&connector_dev_group,
|
|
&connector_tv_dev_group,
|
|
&connector_dvii_dev_group,
|
|
NULL
|
|
};
|
|
|
|
/**
|
|
* drm_sysfs_connector_add - add a connector to sysfs
|
|
* @connector: connector to add
|
|
*
|
|
* Create a connector device in sysfs, along with its associated connector
|
|
* properties (so far, connection status, dpms, mode list & edid) and
|
|
* generate a hotplug event so userspace knows there's a new connector
|
|
* available.
|
|
*/
|
|
int drm_sysfs_connector_add(struct drm_connector *connector)
|
|
{
|
|
struct drm_device *dev = connector->dev;
|
|
|
|
if (connector->kdev)
|
|
return 0;
|
|
|
|
connector->kdev =
|
|
device_create_with_groups(drm_class, dev->primary->kdev, 0,
|
|
connector, connector_dev_groups,
|
|
"card%d-%s", dev->primary->index,
|
|
connector->name);
|
|
DRM_DEBUG("adding \"%s\" to sysfs\n",
|
|
connector->name);
|
|
|
|
if (IS_ERR(connector->kdev)) {
|
|
DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev));
|
|
return PTR_ERR(connector->kdev);
|
|
}
|
|
|
|
/* Let userspace know we have a new connector */
|
|
drm_sysfs_hotplug_event(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* drm_sysfs_connector_remove - remove an connector device from sysfs
|
|
* @connector: connector to remove
|
|
*
|
|
* Remove @connector and its associated attributes from sysfs. Note that
|
|
* the device model core will take care of sending the "remove" uevent
|
|
* at this time, so we don't need to do it.
|
|
*
|
|
* Note:
|
|
* This routine should only be called if the connector was previously
|
|
* successfully registered. If @connector hasn't been registered yet,
|
|
* you'll likely see a panic somewhere deep in sysfs code when called.
|
|
*/
|
|
void drm_sysfs_connector_remove(struct drm_connector *connector)
|
|
{
|
|
if (!connector->kdev)
|
|
return;
|
|
DRM_DEBUG("removing \"%s\" from sysfs\n",
|
|
connector->name);
|
|
|
|
device_unregister(connector->kdev);
|
|
connector->kdev = NULL;
|
|
}
|
|
|
|
/**
|
|
* drm_sysfs_hotplug_event - generate a DRM uevent
|
|
* @dev: DRM device
|
|
*
|
|
* Send a uevent for the DRM device specified by @dev. Currently we only
|
|
* set HOTPLUG=1 in the uevent environment, but this could be expanded to
|
|
* deal with other types of events.
|
|
*/
|
|
void drm_sysfs_hotplug_event(struct drm_device *dev)
|
|
{
|
|
char *event_string = "HOTPLUG=1";
|
|
char *envp[] = { event_string, NULL };
|
|
|
|
DRM_DEBUG("generating hotplug event\n");
|
|
|
|
kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
EXPORT_SYMBOL(drm_sysfs_hotplug_event);
|
|
|
|
static void drm_sysfs_release(struct device *dev)
|
|
{
|
|
kfree(dev);
|
|
}
|
|
|
|
/**
|
|
* drm_sysfs_minor_alloc() - Allocate sysfs device for given minor
|
|
* @minor: minor to allocate sysfs device for
|
|
*
|
|
* This allocates a new sysfs device for @minor and returns it. The device is
|
|
* not registered nor linked. The caller has to use device_add() and
|
|
* device_del() to register and unregister it.
|
|
*
|
|
* Note that dev_get_drvdata() on the new device will return the minor.
|
|
* However, the device does not hold a ref-count to the minor nor to the
|
|
* underlying drm_device. This is unproblematic as long as you access the
|
|
* private data only in sysfs callbacks. device_del() disables those
|
|
* synchronously, so they cannot be called after you cleanup a minor.
|
|
*/
|
|
struct device *drm_sysfs_minor_alloc(struct drm_minor *minor)
|
|
{
|
|
const char *minor_str;
|
|
struct device *kdev;
|
|
int r;
|
|
|
|
if (minor->type == DRM_MINOR_CONTROL)
|
|
minor_str = "controlD%d";
|
|
else if (minor->type == DRM_MINOR_RENDER)
|
|
minor_str = "renderD%d";
|
|
else
|
|
minor_str = "card%d";
|
|
|
|
kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
|
|
if (!kdev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
device_initialize(kdev);
|
|
kdev->devt = MKDEV(DRM_MAJOR, minor->index);
|
|
kdev->class = drm_class;
|
|
kdev->type = &drm_sysfs_device_minor;
|
|
kdev->parent = minor->dev->dev;
|
|
kdev->release = drm_sysfs_release;
|
|
dev_set_drvdata(kdev, minor);
|
|
|
|
r = dev_set_name(kdev, minor_str, minor->index);
|
|
if (r < 0)
|
|
goto err_free;
|
|
|
|
return kdev;
|
|
|
|
err_free:
|
|
put_device(kdev);
|
|
return ERR_PTR(r);
|
|
}
|
|
|
|
/**
|
|
* drm_class_device_register - Register a struct device in the drm class.
|
|
*
|
|
* @dev: pointer to struct device to register.
|
|
*
|
|
* @dev should have all relevant members pre-filled with the exception
|
|
* of the class member. In particular, the device_type member must
|
|
* be set.
|
|
*/
|
|
|
|
int drm_class_device_register(struct device *dev)
|
|
{
|
|
if (!drm_class || IS_ERR(drm_class))
|
|
return -ENOENT;
|
|
|
|
dev->class = drm_class;
|
|
return device_register(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(drm_class_device_register);
|
|
|
|
void drm_class_device_unregister(struct device *dev)
|
|
{
|
|
return device_unregister(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(drm_class_device_unregister);
|