drm: Add privacy-screen class (v4)
On some new laptops the LCD panel has a builtin electronic privacy-screen. We want to export this functionality as a property on the drm connector object. But often this functionality is not exposed on the GPU but on some other (ACPI) device. This commit adds a privacy-screen class allowing the driver for these other devices to register themselves as a privacy-screen provider; and allowing the drm/kms code to get a privacy-screen provider associated with a specific GPU/connector combo. Changes in v2: - Make CONFIG_DRM_PRIVACY_SCREEN a bool which controls if the drm_privacy code gets built as part of the main drm module rather then making it a tristate which builds its own module. - Add a #if IS_ENABLED(CONFIG_DRM_PRIVACY_SCREEN) check to drm_privacy_screen_consumer.h and define stubs when the check fails. Together these 2 changes fix several dependency issues. - Remove module related code now that this is part of the main drm.ko - Use drm_class as class for the privacy-screen devices instead of adding a separate class for this Changes in v3: - Make the static inline drm_privacy_screen_get_state() stub set sw_state and hw_state to PRIVACY_SCREEN_DISABLED to squelch an uninitialized variable warning when CONFIG_DRM_PRIVICAY_SCREEN is not set Changes in v4: - Make drm_privacy_screen_set_sw_state() skip calling out to the hw if hw_state == new_sw_state Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-3-hdegoede@redhat.com
This commit is contained in:
Hans de Goede
Родитель
107fe90430
Коммит
a1a9868930
|
|
@ -435,3 +435,18 @@ Legacy CRTC/Modeset Helper Functions Reference
|
|||
|
||||
.. kernel-doc:: drivers/gpu/drm/drm_crtc_helper.c
|
||||
:export:
|
||||
|
||||
Privacy-screen class
|
||||
====================
|
||||
|
||||
.. kernel-doc:: drivers/gpu/drm/drm_privacy_screen.c
|
||||
:doc: overview
|
||||
|
||||
.. kernel-doc:: include/drm/drm_privacy_screen_driver.h
|
||||
:internal:
|
||||
|
||||
.. kernel-doc:: include/drm/drm_privacy_screen_machine.h
|
||||
:internal:
|
||||
|
||||
.. kernel-doc:: drivers/gpu/drm/drm_privacy_screen.c
|
||||
:export:
|
||||
|
|
|
|||
|
|
@ -6422,6 +6422,14 @@ F: drivers/gpu/drm/drm_panel.c
|
|||
F: drivers/gpu/drm/panel/
|
||||
F: include/drm/drm_panel.h
|
||||
|
||||
DRM PRIVACY-SCREEN CLASS
|
||||
M: Hans de Goede <hdegoede@redhat.com>
|
||||
L: dri-devel@lists.freedesktop.org
|
||||
S: Maintained
|
||||
T: git git://anongit.freedesktop.org/drm/drm-misc
|
||||
F: drivers/gpu/drm/drm_privacy_screen*
|
||||
F: include/drm/drm_privacy_screen*
|
||||
|
||||
DRM TTM SUBSYSTEM
|
||||
M: Christian Koenig <christian.koenig@amd.com>
|
||||
M: Huang Rui <ray.huang@amd.com>
|
||||
|
|
|
|||
|
|
@ -496,3 +496,7 @@ config DRM_PANEL_ORIENTATION_QUIRKS
|
|||
config DRM_LIB_RANDOM
|
||||
bool
|
||||
default n
|
||||
|
||||
config DRM_PRIVACY_SCREEN
|
||||
bool
|
||||
default n
|
||||
|
|
|
|||
|
|
@ -32,6 +32,7 @@ drm-$(CONFIG_OF) += drm_of.o
|
|||
drm-$(CONFIG_PCI) += drm_pci.o
|
||||
drm-$(CONFIG_DEBUG_FS) += drm_debugfs.o drm_debugfs_crc.o
|
||||
drm-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
|
||||
drm-$(CONFIG_DRM_PRIVACY_SCREEN) += drm_privacy_screen.o
|
||||
|
||||
obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
|
||||
|
||||
|
|
|
|||
|
|
@ -43,6 +43,7 @@
|
|||
#include <drm/drm_managed.h>
|
||||
#include <drm/drm_mode_object.h>
|
||||
#include <drm/drm_print.h>
|
||||
#include <drm/drm_privacy_screen_machine.h>
|
||||
|
||||
#include "drm_crtc_internal.h"
|
||||
#include "drm_internal.h"
|
||||
|
|
@ -1029,6 +1030,7 @@ static const struct file_operations drm_stub_fops = {
|
|||
|
||||
static void drm_core_exit(void)
|
||||
{
|
||||
drm_privacy_screen_lookup_exit();
|
||||
unregister_chrdev(DRM_MAJOR, "drm");
|
||||
debugfs_remove(drm_debugfs_root);
|
||||
drm_sysfs_destroy();
|
||||
|
|
@ -1056,6 +1058,8 @@ static int __init drm_core_init(void)
|
|||
if (ret < 0)
|
||||
goto error;
|
||||
|
||||
drm_privacy_screen_lookup_init();
|
||||
|
||||
drm_core_init_complete = true;
|
||||
|
||||
DRM_DEBUG("Initialized\n");
|
||||
|
|
|
|||
|
|
@ -0,0 +1,403 @@
|
|||
// SPDX-License-Identifier: MIT
|
||||
/*
|
||||
* Copyright (C) 2020 - 2021 Red Hat, Inc.
|
||||
*
|
||||
* Authors:
|
||||
* Hans de Goede <hdegoede@redhat.com>
|
||||
*/
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/slab.h>
|
||||
#include <drm/drm_privacy_screen_machine.h>
|
||||
#include <drm/drm_privacy_screen_consumer.h>
|
||||
#include <drm/drm_privacy_screen_driver.h>
|
||||
#include "drm_internal.h"
|
||||
|
||||
/**
|
||||
* DOC: overview
|
||||
*
|
||||
* This class allows non KMS drivers, from e.g. drivers/platform/x86 to
|
||||
* register a privacy-screen device, which the KMS drivers can then use
|
||||
* to implement the standard privacy-screen properties, see
|
||||
* :ref:`Standard Connector Properties<standard_connector_properties>`.
|
||||
*
|
||||
* KMS drivers using a privacy-screen class device are advised to use the
|
||||
* drm_connector_attach_privacy_screen_provider() and
|
||||
* drm_connector_update_privacy_screen() helpers for dealing with this.
|
||||
*/
|
||||
|
||||
#define to_drm_privacy_screen(dev) \
|
||||
container_of(dev, struct drm_privacy_screen, dev)
|
||||
|
||||
static DEFINE_MUTEX(drm_privacy_screen_lookup_lock);
|
||||
static LIST_HEAD(drm_privacy_screen_lookup_list);
|
||||
|
||||
static DEFINE_MUTEX(drm_privacy_screen_devs_lock);
|
||||
static LIST_HEAD(drm_privacy_screen_devs);
|
||||
|
||||
/*** drm_privacy_screen_machine.h functions ***/
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_lookup_add - add an entry to the static privacy-screen
|
||||
* lookup list
|
||||
* @lookup: lookup list entry to add
|
||||
*
|
||||
* Add an entry to the static privacy-screen lookup list. Note the
|
||||
* &struct list_head which is part of the &struct drm_privacy_screen_lookup
|
||||
* gets added to a list owned by the privacy-screen core. So the passed in
|
||||
* &struct drm_privacy_screen_lookup must not be free-ed until it is removed
|
||||
* from the lookup list by calling drm_privacy_screen_lookup_remove().
|
||||
*/
|
||||
void drm_privacy_screen_lookup_add(struct drm_privacy_screen_lookup *lookup)
|
||||
{
|
||||
mutex_lock(&drm_privacy_screen_lookup_lock);
|
||||
list_add(&lookup->list, &drm_privacy_screen_lookup_list);
|
||||
mutex_unlock(&drm_privacy_screen_lookup_lock);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_lookup_add);
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_lookup_remove - remove an entry to the static
|
||||
* privacy-screen lookup list
|
||||
* @lookup: lookup list entry to remove
|
||||
*
|
||||
* Remove an entry previously added with drm_privacy_screen_lookup_add()
|
||||
* from the static privacy-screen lookup list.
|
||||
*/
|
||||
void drm_privacy_screen_lookup_remove(struct drm_privacy_screen_lookup *lookup)
|
||||
{
|
||||
mutex_lock(&drm_privacy_screen_lookup_lock);
|
||||
list_del(&lookup->list);
|
||||
mutex_unlock(&drm_privacy_screen_lookup_lock);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_lookup_remove);
|
||||
|
||||
/*** drm_privacy_screen_consumer.h functions ***/
|
||||
|
||||
static struct drm_privacy_screen *drm_privacy_screen_get_by_name(
|
||||
const char *name)
|
||||
{
|
||||
struct drm_privacy_screen *priv;
|
||||
struct device *dev = NULL;
|
||||
|
||||
mutex_lock(&drm_privacy_screen_devs_lock);
|
||||
|
||||
list_for_each_entry(priv, &drm_privacy_screen_devs, list) {
|
||||
if (strcmp(dev_name(&priv->dev), name) == 0) {
|
||||
dev = get_device(&priv->dev);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&drm_privacy_screen_devs_lock);
|
||||
|
||||
return dev ? to_drm_privacy_screen(dev) : NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_get - get a privacy-screen provider
|
||||
* @dev: consumer-device for which to get a privacy-screen provider
|
||||
* @con_id: (video)connector name for which to get a privacy-screen provider
|
||||
*
|
||||
* Get a privacy-screen provider for a privacy-screen attached to the
|
||||
* display described by the @dev and @con_id parameters.
|
||||
*
|
||||
* Return:
|
||||
* * A pointer to a &struct drm_privacy_screen on success.
|
||||
* * ERR_PTR(-ENODEV) if no matching privacy-screen is found
|
||||
* * ERR_PTR(-EPROBE_DEFER) if there is a matching privacy-screen,
|
||||
* but it has not been registered yet.
|
||||
*/
|
||||
struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
|
||||
const char *con_id)
|
||||
{
|
||||
const char *dev_id = dev ? dev_name(dev) : NULL;
|
||||
struct drm_privacy_screen_lookup *l;
|
||||
struct drm_privacy_screen *priv;
|
||||
const char *provider = NULL;
|
||||
int match, best = -1;
|
||||
|
||||
/*
|
||||
* For now we only support using a static lookup table, which is
|
||||
* populated by the drm_privacy_screen_arch_init() call. This should
|
||||
* be extended with device-tree / fw_node lookup when support is added
|
||||
* for device-tree using hardware with a privacy-screen.
|
||||
*
|
||||
* The lookup algorithm was shamelessly taken from the clock
|
||||
* framework:
|
||||
*
|
||||
* We do slightly fuzzy matching here:
|
||||
* An entry with a NULL ID is assumed to be a wildcard.
|
||||
* If an entry has a device ID, it must match
|
||||
* If an entry has a connection ID, it must match
|
||||
* Then we take the most specific entry - with the following order
|
||||
* of precedence: dev+con > dev only > con only.
|
||||
*/
|
||||
mutex_lock(&drm_privacy_screen_lookup_lock);
|
||||
|
||||
list_for_each_entry(l, &drm_privacy_screen_lookup_list, list) {
|
||||
match = 0;
|
||||
|
||||
if (l->dev_id) {
|
||||
if (!dev_id || strcmp(l->dev_id, dev_id))
|
||||
continue;
|
||||
|
||||
match += 2;
|
||||
}
|
||||
|
||||
if (l->con_id) {
|
||||
if (!con_id || strcmp(l->con_id, con_id))
|
||||
continue;
|
||||
|
||||
match += 1;
|
||||
}
|
||||
|
||||
if (match > best) {
|
||||
provider = l->provider;
|
||||
best = match;
|
||||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&drm_privacy_screen_lookup_lock);
|
||||
|
||||
if (!provider)
|
||||
return ERR_PTR(-ENODEV);
|
||||
|
||||
priv = drm_privacy_screen_get_by_name(provider);
|
||||
if (!priv)
|
||||
return ERR_PTR(-EPROBE_DEFER);
|
||||
|
||||
return priv;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_get);
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_put - release a privacy-screen reference
|
||||
* @priv: privacy screen reference to release
|
||||
*
|
||||
* Release a privacy-screen provider reference gotten through
|
||||
* drm_privacy_screen_get(). May be called with a NULL or ERR_PTR,
|
||||
* in which case it is a no-op.
|
||||
*/
|
||||
void drm_privacy_screen_put(struct drm_privacy_screen *priv)
|
||||
{
|
||||
if (IS_ERR_OR_NULL(priv))
|
||||
return;
|
||||
|
||||
put_device(&priv->dev);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_put);
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_set_sw_state - set a privacy-screen's sw-state
|
||||
* @priv: privacy screen to set the sw-state for
|
||||
* @sw_state: new sw-state value to set
|
||||
*
|
||||
* Set the sw-state of a privacy screen. If the privacy-screen is not
|
||||
* in a locked hw-state, then the actual and hw-state of the privacy-screen
|
||||
* will be immediately updated to the new value. If the privacy-screen is
|
||||
* in a locked hw-state, then the new sw-state will be remembered as the
|
||||
* requested state to put the privacy-screen in when it becomes unlocked.
|
||||
*
|
||||
* Return: 0 on success, negative error code on failure.
|
||||
*/
|
||||
int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status sw_state)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
if (!priv->ops) {
|
||||
ret = -ENODEV;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* As per the DRM connector properties documentation, setting the
|
||||
* sw_state while the hw_state is locked is allowed. In this case
|
||||
* it is a no-op other then storing the new sw_state so that it
|
||||
* can be honored when the state gets unlocked.
|
||||
* Also skip the set if the hw already is in the desired state.
|
||||
*/
|
||||
if (priv->hw_state >= PRIVACY_SCREEN_DISABLED_LOCKED ||
|
||||
priv->hw_state == sw_state) {
|
||||
priv->sw_state = sw_state;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = priv->ops->set_sw_state(priv, sw_state);
|
||||
out:
|
||||
mutex_unlock(&priv->lock);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_set_sw_state);
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_get_state - get privacy-screen's current state
|
||||
* @priv: privacy screen to get the state for
|
||||
* @sw_state_ret: address where to store the privacy-screens current sw-state
|
||||
* @hw_state_ret: address where to store the privacy-screens current hw-state
|
||||
*
|
||||
* Get the current state of a privacy-screen, both the sw-state and the
|
||||
* hw-state.
|
||||
*/
|
||||
void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status *sw_state_ret,
|
||||
enum drm_privacy_screen_status *hw_state_ret)
|
||||
{
|
||||
mutex_lock(&priv->lock);
|
||||
*sw_state_ret = priv->sw_state;
|
||||
*hw_state_ret = priv->hw_state;
|
||||
mutex_unlock(&priv->lock);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_get_state);
|
||||
|
||||
/*** drm_privacy_screen_driver.h functions ***/
|
||||
|
||||
static ssize_t sw_state_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct drm_privacy_screen *priv = to_drm_privacy_screen(dev);
|
||||
const char * const sw_state_names[] = {
|
||||
"Disabled",
|
||||
"Enabled",
|
||||
};
|
||||
ssize_t ret;
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
if (!priv->ops)
|
||||
ret = -ENODEV;
|
||||
else if (WARN_ON(priv->sw_state >= ARRAY_SIZE(sw_state_names)))
|
||||
ret = -ENXIO;
|
||||
else
|
||||
ret = sprintf(buf, "%s\n", sw_state_names[priv->sw_state]);
|
||||
|
||||
mutex_unlock(&priv->lock);
|
||||
return ret;
|
||||
}
|
||||
/*
|
||||
* RO: Do not allow setting the sw_state through sysfs, this MUST be done
|
||||
* through the drm_properties on the drm_connector.
|
||||
*/
|
||||
static DEVICE_ATTR_RO(sw_state);
|
||||
|
||||
static ssize_t hw_state_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct drm_privacy_screen *priv = to_drm_privacy_screen(dev);
|
||||
const char * const hw_state_names[] = {
|
||||
"Disabled",
|
||||
"Enabled",
|
||||
"Disabled, locked",
|
||||
"Enabled, locked",
|
||||
};
|
||||
ssize_t ret;
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
if (!priv->ops)
|
||||
ret = -ENODEV;
|
||||
else if (WARN_ON(priv->hw_state >= ARRAY_SIZE(hw_state_names)))
|
||||
ret = -ENXIO;
|
||||
else
|
||||
ret = sprintf(buf, "%s\n", hw_state_names[priv->hw_state]);
|
||||
|
||||
mutex_unlock(&priv->lock);
|
||||
return ret;
|
||||
}
|
||||
static DEVICE_ATTR_RO(hw_state);
|
||||
|
||||
static struct attribute *drm_privacy_screen_attrs[] = {
|
||||
&dev_attr_sw_state.attr,
|
||||
&dev_attr_hw_state.attr,
|
||||
NULL
|
||||
};
|
||||
ATTRIBUTE_GROUPS(drm_privacy_screen);
|
||||
|
||||
static struct device_type drm_privacy_screen_type = {
|
||||
.name = "privacy_screen",
|
||||
.groups = drm_privacy_screen_groups,
|
||||
};
|
||||
|
||||
static void drm_privacy_screen_device_release(struct device *dev)
|
||||
{
|
||||
struct drm_privacy_screen *priv = to_drm_privacy_screen(dev);
|
||||
|
||||
kfree(priv);
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_register - register a privacy-screen
|
||||
* @parent: parent-device for the privacy-screen
|
||||
* @ops: &struct drm_privacy_screen_ops pointer with ops for the privacy-screen
|
||||
*
|
||||
* Create and register a privacy-screen.
|
||||
*
|
||||
* Return:
|
||||
* * A pointer to the created privacy-screen on success.
|
||||
* * An ERR_PTR(errno) on failure.
|
||||
*/
|
||||
struct drm_privacy_screen *drm_privacy_screen_register(
|
||||
struct device *parent, const struct drm_privacy_screen_ops *ops)
|
||||
{
|
||||
struct drm_privacy_screen *priv;
|
||||
int ret;
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
mutex_init(&priv->lock);
|
||||
|
||||
priv->dev.class = drm_class;
|
||||
priv->dev.type = &drm_privacy_screen_type;
|
||||
priv->dev.parent = parent;
|
||||
priv->dev.release = drm_privacy_screen_device_release;
|
||||
dev_set_name(&priv->dev, "privacy_screen-%s", dev_name(parent));
|
||||
priv->ops = ops;
|
||||
|
||||
priv->ops->get_hw_state(priv);
|
||||
|
||||
ret = device_register(&priv->dev);
|
||||
if (ret) {
|
||||
put_device(&priv->dev);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
|
||||
mutex_lock(&drm_privacy_screen_devs_lock);
|
||||
list_add(&priv->list, &drm_privacy_screen_devs);
|
||||
mutex_unlock(&drm_privacy_screen_devs_lock);
|
||||
|
||||
return priv;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_register);
|
||||
|
||||
/**
|
||||
* drm_privacy_screen_unregister - unregister privacy-screen
|
||||
* @priv: privacy-screen to unregister
|
||||
*
|
||||
* Unregister a privacy-screen registered with drm_privacy_screen_register().
|
||||
* May be called with a NULL or ERR_PTR, in which case it is a no-op.
|
||||
*/
|
||||
void drm_privacy_screen_unregister(struct drm_privacy_screen *priv)
|
||||
{
|
||||
if (IS_ERR_OR_NULL(priv))
|
||||
return;
|
||||
|
||||
mutex_lock(&drm_privacy_screen_devs_lock);
|
||||
list_del(&priv->list);
|
||||
mutex_unlock(&drm_privacy_screen_devs_lock);
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
priv->ops = NULL;
|
||||
mutex_unlock(&priv->lock);
|
||||
|
||||
device_unregister(&priv->dev);
|
||||
}
|
||||
EXPORT_SYMBOL(drm_privacy_screen_unregister);
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
/* SPDX-License-Identifier: MIT */
|
||||
/*
|
||||
* Copyright (C) 2020 Red Hat, Inc.
|
||||
*
|
||||
* Authors:
|
||||
* Hans de Goede <hdegoede@redhat.com>
|
||||
*/
|
||||
|
||||
#ifndef __DRM_PRIVACY_SCREEN_CONSUMER_H__
|
||||
#define __DRM_PRIVACY_SCREEN_CONSUMER_H__
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <drm/drm_connector.h>
|
||||
|
||||
struct drm_privacy_screen;
|
||||
|
||||
#if IS_ENABLED(CONFIG_DRM_PRIVACY_SCREEN)
|
||||
struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
|
||||
const char *con_id);
|
||||
void drm_privacy_screen_put(struct drm_privacy_screen *priv);
|
||||
|
||||
int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status sw_state);
|
||||
void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status *sw_state_ret,
|
||||
enum drm_privacy_screen_status *hw_state_ret);
|
||||
#else
|
||||
static inline struct drm_privacy_screen *drm_privacy_screen_get(struct device *dev,
|
||||
const char *con_id)
|
||||
{
|
||||
return ERR_PTR(-ENODEV);
|
||||
}
|
||||
static inline void drm_privacy_screen_put(struct drm_privacy_screen *priv)
|
||||
{
|
||||
}
|
||||
static inline int drm_privacy_screen_set_sw_state(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status sw_state)
|
||||
{
|
||||
return -ENODEV;
|
||||
}
|
||||
static inline void drm_privacy_screen_get_state(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status *sw_state_ret,
|
||||
enum drm_privacy_screen_status *hw_state_ret)
|
||||
{
|
||||
*sw_state_ret = PRIVACY_SCREEN_DISABLED;
|
||||
*hw_state_ret = PRIVACY_SCREEN_DISABLED;
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,80 @@
|
|||
/* SPDX-License-Identifier: MIT */
|
||||
/*
|
||||
* Copyright (C) 2020 Red Hat, Inc.
|
||||
*
|
||||
* Authors:
|
||||
* Hans de Goede <hdegoede@redhat.com>
|
||||
*/
|
||||
|
||||
#ifndef __DRM_PRIVACY_SCREEN_DRIVER_H__
|
||||
#define __DRM_PRIVACY_SCREEN_DRIVER_H__
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <drm/drm_connector.h>
|
||||
|
||||
struct drm_privacy_screen;
|
||||
|
||||
/**
|
||||
* struct drm_privacy_screen_ops - drm_privacy_screen operations
|
||||
*
|
||||
* Defines the operations which the privacy-screen class code may call.
|
||||
* These functions should be implemented by the privacy-screen driver.
|
||||
*/
|
||||
struct drm_privacy_screen_ops {
|
||||
/**
|
||||
* @set_sw_state: Called to request a change of the privacy-screen
|
||||
* state. The privacy-screen class code contains a check to avoid this
|
||||
* getting called when the hw_state reports the state is locked.
|
||||
* It is the driver's responsibility to update sw_state and hw_state.
|
||||
* This is always called with the drm_privacy_screen's lock held.
|
||||
*/
|
||||
int (*set_sw_state)(struct drm_privacy_screen *priv,
|
||||
enum drm_privacy_screen_status sw_state);
|
||||
/**
|
||||
* @get_hw_state: Called to request that the driver gets the current
|
||||
* privacy-screen state from the hardware and then updates sw_state and
|
||||
* hw_state accordingly. This will be called by the core just before
|
||||
* the privacy-screen is registered in sysfs.
|
||||
*/
|
||||
void (*get_hw_state)(struct drm_privacy_screen *priv);
|
||||
};
|
||||
|
||||
/**
|
||||
* struct drm_privacy_screen - central privacy-screen structure
|
||||
*
|
||||
* Central privacy-screen structure, this contains the struct device used
|
||||
* to register the screen in sysfs, the screen's state, ops, etc.
|
||||
*/
|
||||
struct drm_privacy_screen {
|
||||
/** @dev: device used to register the privacy-screen in sysfs. */
|
||||
struct device dev;
|
||||
/** @lock: mutex protection all fields in this struct. */
|
||||
struct mutex lock;
|
||||
/** @list: privacy-screen devices list list-entry. */
|
||||
struct list_head list;
|
||||
/**
|
||||
* @ops: &struct drm_privacy_screen_ops for this privacy-screen.
|
||||
* This is NULL if the driver has unregistered the privacy-screen.
|
||||
*/
|
||||
const struct drm_privacy_screen_ops *ops;
|
||||
/**
|
||||
* @sw_state: The privacy-screen's software state, see
|
||||
* :ref:`Standard Connector Properties<standard_connector_properties>`
|
||||
* for more info.
|
||||
*/
|
||||
enum drm_privacy_screen_status sw_state;
|
||||
/**
|
||||
* @hw_state: The privacy-screen's hardware state, see
|
||||
* :ref:`Standard Connector Properties<standard_connector_properties>`
|
||||
* for more info.
|
||||
*/
|
||||
enum drm_privacy_screen_status hw_state;
|
||||
};
|
||||
|
||||
struct drm_privacy_screen *drm_privacy_screen_register(
|
||||
struct device *parent, const struct drm_privacy_screen_ops *ops);
|
||||
void drm_privacy_screen_unregister(struct drm_privacy_screen *priv);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
/* SPDX-License-Identifier: MIT */
|
||||
/*
|
||||
* Copyright (C) 2020 Red Hat, Inc.
|
||||
*
|
||||
* Authors:
|
||||
* Hans de Goede <hdegoede@redhat.com>
|
||||
*/
|
||||
|
||||
#ifndef __DRM_PRIVACY_SCREEN_MACHINE_H__
|
||||
#define __DRM_PRIVACY_SCREEN_MACHINE_H__
|
||||
|
||||
#include <linux/list.h>
|
||||
|
||||
/**
|
||||
* struct drm_privacy_screen_lookup - static privacy-screen lookup list entry
|
||||
*
|
||||
* Used for the static lookup-list for mapping privacy-screen consumer
|
||||
* dev-connector pairs to a privacy-screen provider.
|
||||
*/
|
||||
struct drm_privacy_screen_lookup {
|
||||
/** @list: Lookup list list-entry. */
|
||||
struct list_head list;
|
||||
/** @dev_id: Consumer device name or NULL to match all devices. */
|
||||
const char *dev_id;
|
||||
/** @con_id: Consumer connector name or NULL to match all connectors. */
|
||||
const char *con_id;
|
||||
/** @provider: dev_name() of the privacy_screen provider. */
|
||||
const char *provider;
|
||||
};
|
||||
|
||||
void drm_privacy_screen_lookup_add(struct drm_privacy_screen_lookup *lookup);
|
||||
void drm_privacy_screen_lookup_remove(struct drm_privacy_screen_lookup *lookup);
|
||||
|
||||
static inline void drm_privacy_screen_lookup_init(void)
|
||||
{
|
||||
}
|
||||
static inline void drm_privacy_screen_lookup_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
#endif
|
||||
Загрузка…
Ссылка в новой задаче