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sys/dev/drm/core/drm_connector.c
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/* | |||||
* Copyright (c) 2016 Intel Corporation | |||||
* | |||||
* Permission to use, copy, modify, distribute, and sell this software and its | |||||
* documentation for any purpose is hereby granted without fee, provided that | |||||
* the above copyright notice appear in all copies and that both that copyright | |||||
* notice and this permission notice appear in supporting documentation, and | |||||
* that the name of the copyright holders not be used in advertising or | |||||
* publicity pertaining to distribution of the software without specific, | |||||
* written prior permission. The copyright holders make no representations | |||||
* about the suitability of this software for any purpose. It is provided "as | |||||
* is" without express or implied warranty. | |||||
* | |||||
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | |||||
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | |||||
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | |||||
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | |||||
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | |||||
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | |||||
* OF THIS SOFTWARE. | |||||
*/ | |||||
/* Due to header polution in Linux we need those files included */ | |||||
#ifdef __FreeBSD__ | |||||
#include <linux/refcount.h> | |||||
#include <linux/lockdep.h> | |||||
#endif | |||||
#include <drm/drm_connector.h> | |||||
#include <drm/drm_edid.h> | |||||
#include <drm/drm_encoder.h> | |||||
#include <drm/drm_utils.h> | |||||
#include <drm/drm_print.h> | |||||
#include <drm/drm_drv.h> | |||||
#include <drm/drm_file.h> | |||||
#include <linux/uaccess.h> | |||||
#include "drm_crtc_internal.h" | |||||
#include "drm_internal.h" | |||||
/** | |||||
* DOC: overview | |||||
* | |||||
* In DRM connectors are the general abstraction for display sinks, and include | |||||
* als fixed panels or anything else that can display pixels in some form. As | |||||
* opposed to all other KMS objects representing hardware (like CRTC, encoder or | |||||
* plane abstractions) connectors can be hotplugged and unplugged at runtime. | |||||
* Hence they are reference-counted using drm_connector_get() and | |||||
* drm_connector_put(). | |||||
* | |||||
* KMS driver must create, initialize, register and attach at a &struct | |||||
* drm_connector for each such sink. The instance is created as other KMS | |||||
* objects and initialized by setting the following fields. The connector is | |||||
* initialized with a call to drm_connector_init() with a pointer to the | |||||
* &struct drm_connector_funcs and a connector type, and then exposed to | |||||
* userspace with a call to drm_connector_register(). | |||||
* | |||||
* Connectors must be attached to an encoder to be used. For devices that map | |||||
* connectors to encoders 1:1, the connector should be attached at | |||||
* initialization time with a call to drm_connector_attach_encoder(). The | |||||
* driver must also set the &drm_connector.encoder field to point to the | |||||
* attached encoder. | |||||
* | |||||
* For connectors which are not fixed (like built-in panels) the driver needs to | |||||
* support hotplug notifications. The simplest way to do that is by using the | |||||
* probe helpers, see drm_kms_helper_poll_init() for connectors which don't have | |||||
* hardware support for hotplug interrupts. Connectors with hardware hotplug | |||||
* support can instead use e.g. drm_helper_hpd_irq_event(). | |||||
*/ | |||||
struct drm_conn_prop_enum_list { | |||||
int type; | |||||
const char *name; | |||||
struct ida ida; | |||||
}; | |||||
/* | |||||
* Connector and encoder types. | |||||
*/ | |||||
static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { | |||||
{ DRM_MODE_CONNECTOR_Unknown, "Unknown" }, | |||||
{ DRM_MODE_CONNECTOR_VGA, "VGA" }, | |||||
{ DRM_MODE_CONNECTOR_DVII, "DVI-I" }, | |||||
{ DRM_MODE_CONNECTOR_DVID, "DVI-D" }, | |||||
{ DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, | |||||
{ DRM_MODE_CONNECTOR_Composite, "Composite" }, | |||||
{ DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, | |||||
{ DRM_MODE_CONNECTOR_LVDS, "LVDS" }, | |||||
{ DRM_MODE_CONNECTOR_Component, "Component" }, | |||||
{ DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, | |||||
{ DRM_MODE_CONNECTOR_DisplayPort, "DP" }, | |||||
{ DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, | |||||
{ DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, | |||||
{ DRM_MODE_CONNECTOR_TV, "TV" }, | |||||
{ DRM_MODE_CONNECTOR_eDP, "eDP" }, | |||||
{ DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, | |||||
{ DRM_MODE_CONNECTOR_DSI, "DSI" }, | |||||
{ DRM_MODE_CONNECTOR_DPI, "DPI" }, | |||||
{ DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" }, | |||||
{ DRM_MODE_CONNECTOR_SPI, "SPI" }, | |||||
}; | |||||
void drm_connector_ida_init(void) | |||||
{ | |||||
int i; | |||||
for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |||||
ida_init(&drm_connector_enum_list[i].ida); | |||||
} | |||||
void drm_connector_ida_destroy(void) | |||||
{ | |||||
int i; | |||||
for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) | |||||
ida_destroy(&drm_connector_enum_list[i].ida); | |||||
} | |||||
/** | |||||
* drm_connector_get_cmdline_mode - reads the user's cmdline mode | |||||
* @connector: connector to quwery | |||||
* | |||||
* The kernel supports per-connector configuration of its consoles through | |||||
* use of the video= parameter. This function parses that option and | |||||
* extracts the user's specified mode (or enable/disable status) for a | |||||
* particular connector. This is typically only used during the early fbdev | |||||
* setup. | |||||
*/ | |||||
static void drm_connector_get_cmdline_mode(struct drm_connector *connector) | |||||
{ | |||||
struct drm_cmdline_mode *mode = &connector->cmdline_mode; | |||||
char *option = NULL; | |||||
if (fb_get_options(connector->name, &option)) | |||||
return; | |||||
if (!drm_mode_parse_command_line_for_connector(option, | |||||
connector, | |||||
mode)) | |||||
return; | |||||
if (mode->force) { | |||||
DRM_INFO("forcing %s connector %s\n", connector->name, | |||||
drm_get_connector_force_name(mode->force)); | |||||
connector->force = mode->force; | |||||
} | |||||
DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n", | |||||
connector->name, mode->name, | |||||
mode->xres, mode->yres, | |||||
mode->refresh_specified ? mode->refresh : 60, | |||||
mode->rb ? " reduced blanking" : "", | |||||
mode->margins ? " with margins" : "", | |||||
mode->interlace ? " interlaced" : ""); | |||||
} | |||||
static void drm_connector_free(struct kref *kref) | |||||
{ | |||||
struct drm_connector *connector = | |||||
container_of(kref, struct drm_connector, base.refcount); | |||||
struct drm_device *dev = connector->dev; | |||||
drm_mode_object_unregister(dev, &connector->base); | |||||
connector->funcs->destroy(connector); | |||||
} | |||||
void drm_connector_free_work_fn(struct work_struct *work) | |||||
{ | |||||
struct drm_connector *connector, *n; | |||||
struct drm_device *dev = | |||||
container_of(work, struct drm_device, mode_config.connector_free_work); | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
unsigned long flags; | |||||
struct llist_node *freed; | |||||
spin_lock_irqsave(&config->connector_list_lock, flags); | |||||
freed = llist_del_all(&config->connector_free_list); | |||||
spin_unlock_irqrestore(&config->connector_list_lock, flags); | |||||
llist_for_each_entry_safe(connector, n, freed, free_node) { | |||||
drm_mode_object_unregister(dev, &connector->base); | |||||
connector->funcs->destroy(connector); | |||||
} | |||||
} | |||||
/** | |||||
* drm_connector_init - Init a preallocated connector | |||||
* @dev: DRM device | |||||
* @connector: the connector to init | |||||
* @funcs: callbacks for this connector | |||||
* @connector_type: user visible type of the connector | |||||
* | |||||
* Initialises a preallocated connector. Connectors should be | |||||
* subclassed as part of driver connector objects. | |||||
* | |||||
* Returns: | |||||
* Zero on success, error code on failure. | |||||
*/ | |||||
int drm_connector_init(struct drm_device *dev, | |||||
struct drm_connector *connector, | |||||
const struct drm_connector_funcs *funcs, | |||||
int connector_type) | |||||
{ | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
int ret; | |||||
struct ida *connector_ida = | |||||
&drm_connector_enum_list[connector_type].ida; | |||||
WARN_ON(drm_drv_uses_atomic_modeset(dev) && | |||||
(!funcs->atomic_destroy_state || | |||||
!funcs->atomic_duplicate_state)); | |||||
ret = __drm_mode_object_add(dev, &connector->base, | |||||
DRM_MODE_OBJECT_CONNECTOR, | |||||
false, drm_connector_free); | |||||
if (ret) | |||||
return ret; | |||||
connector->base.properties = &connector->properties; | |||||
connector->dev = dev; | |||||
connector->funcs = funcs; | |||||
/* connector index is used with 32bit bitmasks */ | |||||
ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL); | |||||
if (ret < 0) { | |||||
DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n", | |||||
drm_connector_enum_list[connector_type].name, | |||||
ret); | |||||
goto out_put; | |||||
} | |||||
connector->index = ret; | |||||
ret = 0; | |||||
connector->connector_type = connector_type; | |||||
connector->connector_type_id = | |||||
ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); | |||||
if (connector->connector_type_id < 0) { | |||||
ret = connector->connector_type_id; | |||||
goto out_put_id; | |||||
} | |||||
connector->name = | |||||
kasprintf(GFP_KERNEL, "%s-%d", | |||||
drm_connector_enum_list[connector_type].name, | |||||
connector->connector_type_id); | |||||
if (!connector->name) { | |||||
ret = -ENOMEM; | |||||
goto out_put_type_id; | |||||
} | |||||
INIT_LIST_HEAD(&connector->probed_modes); | |||||
INIT_LIST_HEAD(&connector->modes); | |||||
mutex_init(&connector->mutex); | |||||
connector->edid_blob_ptr = NULL; | |||||
connector->tile_blob_ptr = NULL; | |||||
connector->status = connector_status_unknown; | |||||
connector->display_info.panel_orientation = | |||||
DRM_MODE_PANEL_ORIENTATION_UNKNOWN; | |||||
drm_connector_get_cmdline_mode(connector); | |||||
/* We should add connectors at the end to avoid upsetting the connector | |||||
* index too much. */ | |||||
spin_lock_irq(&config->connector_list_lock); | |||||
list_add_tail(&connector->head, &config->connector_list); | |||||
config->num_connector++; | |||||
spin_unlock_irq(&config->connector_list_lock); | |||||
if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL && | |||||
connector_type != DRM_MODE_CONNECTOR_WRITEBACK) | |||||
drm_connector_attach_edid_property(connector); | |||||
drm_object_attach_property(&connector->base, | |||||
config->dpms_property, 0); | |||||
drm_object_attach_property(&connector->base, | |||||
config->link_status_property, | |||||
0); | |||||
drm_object_attach_property(&connector->base, | |||||
config->non_desktop_property, | |||||
0); | |||||
drm_object_attach_property(&connector->base, | |||||
config->tile_property, | |||||
0); | |||||
if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { | |||||
drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); | |||||
} | |||||
connector->debugfs_entry = NULL; | |||||
out_put_type_id: | |||||
if (ret) | |||||
ida_simple_remove(connector_ida, connector->connector_type_id); | |||||
out_put_id: | |||||
if (ret) | |||||
ida_simple_remove(&config->connector_ida, connector->index); | |||||
out_put: | |||||
if (ret) | |||||
drm_mode_object_unregister(dev, &connector->base); | |||||
return ret; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_init); | |||||
/** | |||||
* drm_connector_init_with_ddc - Init a preallocated connector | |||||
* @dev: DRM device | |||||
* @connector: the connector to init | |||||
* @funcs: callbacks for this connector | |||||
* @connector_type: user visible type of the connector | |||||
* @ddc: pointer to the associated ddc adapter | |||||
* | |||||
* Initialises a preallocated connector. Connectors should be | |||||
* subclassed as part of driver connector objects. | |||||
* | |||||
* Ensures that the ddc field of the connector is correctly set. | |||||
* | |||||
* Returns: | |||||
* Zero on success, error code on failure. | |||||
*/ | |||||
int drm_connector_init_with_ddc(struct drm_device *dev, | |||||
struct drm_connector *connector, | |||||
const struct drm_connector_funcs *funcs, | |||||
int connector_type, | |||||
struct i2c_adapter *ddc) | |||||
{ | |||||
int ret; | |||||
ret = drm_connector_init(dev, connector, funcs, connector_type); | |||||
if (ret) | |||||
return ret; | |||||
/* provide ddc symlink in sysfs */ | |||||
connector->ddc = ddc; | |||||
return ret; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_init_with_ddc); | |||||
/** | |||||
* drm_connector_attach_edid_property - attach edid property. | |||||
* @connector: the connector | |||||
* | |||||
* Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a | |||||
* edid property attached by default. This function can be used to | |||||
* explicitly enable the edid property in these cases. | |||||
*/ | |||||
void drm_connector_attach_edid_property(struct drm_connector *connector) | |||||
{ | |||||
struct drm_mode_config *config = &connector->dev->mode_config; | |||||
drm_object_attach_property(&connector->base, | |||||
config->edid_property, | |||||
0); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_edid_property); | |||||
/** | |||||
* drm_connector_attach_encoder - attach a connector to an encoder | |||||
* @connector: connector to attach | |||||
* @encoder: encoder to attach @connector to | |||||
* | |||||
* This function links up a connector to an encoder. Note that the routing | |||||
* restrictions between encoders and crtcs are exposed to userspace through the | |||||
* possible_clones and possible_crtcs bitmasks. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_connector_attach_encoder(struct drm_connector *connector, | |||||
struct drm_encoder *encoder) | |||||
{ | |||||
int i; | |||||
/* | |||||
* In the past, drivers have attempted to model the static association | |||||
* of connector to encoder in simple connector/encoder devices using a | |||||
* direct assignment of connector->encoder = encoder. This connection | |||||
* is a logical one and the responsibility of the core, so drivers are | |||||
* expected not to mess with this. | |||||
* | |||||
* Note that the error return should've been enough here, but a large | |||||
* majority of drivers ignores the return value, so add in a big WARN | |||||
* to get people's attention. | |||||
*/ | |||||
if (WARN_ON(connector->encoder)) | |||||
return -EINVAL; | |||||
for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) { | |||||
if (connector->encoder_ids[i] == 0) { | |||||
connector->encoder_ids[i] = encoder->base.id; | |||||
return 0; | |||||
} | |||||
} | |||||
return -ENOMEM; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_encoder); | |||||
/** | |||||
* drm_connector_has_possible_encoder - check if the connector and encoder are assosicated with each other | |||||
* @connector: the connector | |||||
* @encoder: the encoder | |||||
* | |||||
* Returns: | |||||
* True if @encoder is one of the possible encoders for @connector. | |||||
*/ | |||||
bool drm_connector_has_possible_encoder(struct drm_connector *connector, | |||||
struct drm_encoder *encoder) | |||||
{ | |||||
struct drm_encoder *enc; | |||||
int i; | |||||
drm_connector_for_each_possible_encoder(connector, enc, i) { | |||||
if (enc == encoder) | |||||
return true; | |||||
} | |||||
return false; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_has_possible_encoder); | |||||
static void drm_mode_remove(struct drm_connector *connector, | |||||
struct drm_display_mode *mode) | |||||
{ | |||||
list_del(&mode->head); | |||||
drm_mode_destroy(connector->dev, mode); | |||||
} | |||||
/** | |||||
* drm_connector_cleanup - cleans up an initialised connector | |||||
* @connector: connector to cleanup | |||||
* | |||||
* Cleans up the connector but doesn't free the object. | |||||
*/ | |||||
void drm_connector_cleanup(struct drm_connector *connector) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
struct drm_display_mode *mode, *t; | |||||
/* The connector should have been removed from userspace long before | |||||
* it is finally destroyed. | |||||
*/ | |||||
if (WARN_ON(connector->registration_state == | |||||
DRM_CONNECTOR_REGISTERED)) | |||||
drm_connector_unregister(connector); | |||||
if (connector->tile_group) { | |||||
drm_mode_put_tile_group(dev, connector->tile_group); | |||||
connector->tile_group = NULL; | |||||
} | |||||
list_for_each_entry_safe(mode, t, &connector->probed_modes, head) | |||||
drm_mode_remove(connector, mode); | |||||
list_for_each_entry_safe(mode, t, &connector->modes, head) | |||||
drm_mode_remove(connector, mode); | |||||
ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida, | |||||
connector->connector_type_id); | |||||
ida_simple_remove(&dev->mode_config.connector_ida, | |||||
connector->index); | |||||
kfree(connector->display_info.bus_formats); | |||||
drm_mode_object_unregister(dev, &connector->base); | |||||
kfree(connector->name); | |||||
connector->name = NULL; | |||||
spin_lock_irq(&dev->mode_config.connector_list_lock); | |||||
list_del(&connector->head); | |||||
dev->mode_config.num_connector--; | |||||
spin_unlock_irq(&dev->mode_config.connector_list_lock); | |||||
WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); | |||||
if (connector->state && connector->funcs->atomic_destroy_state) | |||||
connector->funcs->atomic_destroy_state(connector, | |||||
connector->state); | |||||
mutex_destroy(&connector->mutex); | |||||
memset(connector, 0, sizeof(*connector)); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_cleanup); | |||||
/** | |||||
* drm_connector_register - register a connector | |||||
* @connector: the connector to register | |||||
* | |||||
* Register userspace interfaces for a connector | |||||
* | |||||
* Returns: | |||||
* Zero on success, error code on failure. | |||||
*/ | |||||
int drm_connector_register(struct drm_connector *connector) | |||||
{ | |||||
int ret = 0; | |||||
if (!connector->dev->registered) | |||||
return 0; | |||||
mutex_lock(&connector->mutex); | |||||
if (connector->registration_state != DRM_CONNECTOR_INITIALIZING) | |||||
goto unlock; | |||||
ret = drm_sysfs_connector_add(connector); | |||||
if (ret) | |||||
goto unlock; | |||||
drm_debugfs_connector_add(connector); | |||||
if (connector->funcs->late_register) { | |||||
ret = connector->funcs->late_register(connector); | |||||
if (ret) | |||||
goto err_debugfs; | |||||
} | |||||
drm_mode_object_register(connector->dev, &connector->base); | |||||
connector->registration_state = DRM_CONNECTOR_REGISTERED; | |||||
goto unlock; | |||||
err_debugfs: | |||||
drm_debugfs_connector_remove(connector); | |||||
drm_sysfs_connector_remove(connector); | |||||
unlock: | |||||
mutex_unlock(&connector->mutex); | |||||
return ret; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_register); | |||||
/** | |||||
* drm_connector_unregister - unregister a connector | |||||
* @connector: the connector to unregister | |||||
* | |||||
* Unregister userspace interfaces for a connector | |||||
*/ | |||||
void drm_connector_unregister(struct drm_connector *connector) | |||||
{ | |||||
mutex_lock(&connector->mutex); | |||||
if (connector->registration_state != DRM_CONNECTOR_REGISTERED) { | |||||
mutex_unlock(&connector->mutex); | |||||
return; | |||||
} | |||||
if (connector->funcs->early_unregister) | |||||
connector->funcs->early_unregister(connector); | |||||
drm_sysfs_connector_remove(connector); | |||||
drm_debugfs_connector_remove(connector); | |||||
connector->registration_state = DRM_CONNECTOR_UNREGISTERED; | |||||
mutex_unlock(&connector->mutex); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_unregister); | |||||
void drm_connector_unregister_all(struct drm_device *dev) | |||||
{ | |||||
struct drm_connector *connector; | |||||
struct drm_connector_list_iter conn_iter; | |||||
drm_connector_list_iter_begin(dev, &conn_iter); | |||||
drm_for_each_connector_iter(connector, &conn_iter) | |||||
drm_connector_unregister(connector); | |||||
drm_connector_list_iter_end(&conn_iter); | |||||
} | |||||
int drm_connector_register_all(struct drm_device *dev) | |||||
{ | |||||
struct drm_connector *connector; | |||||
struct drm_connector_list_iter conn_iter; | |||||
int ret = 0; | |||||
drm_connector_list_iter_begin(dev, &conn_iter); | |||||
drm_for_each_connector_iter(connector, &conn_iter) { | |||||
ret = drm_connector_register(connector); | |||||
if (ret) | |||||
break; | |||||
} | |||||
drm_connector_list_iter_end(&conn_iter); | |||||
if (ret) | |||||
drm_connector_unregister_all(dev); | |||||
return ret; | |||||
} | |||||
/** | |||||
* drm_get_connector_status_name - return a string for connector status | |||||
* @status: connector status to compute name of | |||||
* | |||||
* In contrast to the other drm_get_*_name functions this one here returns a | |||||
* const pointer and hence is threadsafe. | |||||
*/ | |||||
const char *drm_get_connector_status_name(enum drm_connector_status status) | |||||
{ | |||||
if (status == connector_status_connected) | |||||
return "connected"; | |||||
else if (status == connector_status_disconnected) | |||||
return "disconnected"; | |||||
else | |||||
return "unknown"; | |||||
} | |||||
EXPORT_SYMBOL(drm_get_connector_status_name); | |||||
/** | |||||
* drm_get_connector_force_name - return a string for connector force | |||||
* @force: connector force to get name of | |||||
* | |||||
* Returns: const pointer to name. | |||||
*/ | |||||
const char *drm_get_connector_force_name(enum drm_connector_force force) | |||||
{ | |||||
switch (force) { | |||||
case DRM_FORCE_UNSPECIFIED: | |||||
return "unspecified"; | |||||
case DRM_FORCE_OFF: | |||||
return "off"; | |||||
case DRM_FORCE_ON: | |||||
return "on"; | |||||
case DRM_FORCE_ON_DIGITAL: | |||||
return "digital"; | |||||
default: | |||||
return "unknown"; | |||||
} | |||||
} | |||||
#ifdef CONFIG_LOCKDEP | |||||
static struct lockdep_map connector_list_iter_dep_map = { | |||||
.name = "drm_connector_list_iter" | |||||
}; | |||||
#endif | |||||
/** | |||||
* drm_connector_list_iter_begin - initialize a connector_list iterator | |||||
* @dev: DRM device | |||||
* @iter: connector_list iterator | |||||
* | |||||
* Sets @iter up to walk the &drm_mode_config.connector_list of @dev. @iter | |||||
* must always be cleaned up again by calling drm_connector_list_iter_end(). | |||||
* Iteration itself happens using drm_connector_list_iter_next() or | |||||
* drm_for_each_connector_iter(). | |||||
*/ | |||||
void drm_connector_list_iter_begin(struct drm_device *dev, | |||||
struct drm_connector_list_iter *iter) | |||||
{ | |||||
iter->dev = dev; | |||||
iter->conn = NULL; | |||||
lock_acquire_shared_recursive(&connector_list_iter_dep_map, 0, 1, NULL, _RET_IP_); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_list_iter_begin); | |||||
/* | |||||
* Extra-safe connector put function that works in any context. Should only be | |||||
* used from the connector_iter functions, where we never really expect to | |||||
* actually release the connector when dropping our final reference. | |||||
*/ | |||||
static void | |||||
__drm_connector_put_safe(struct drm_connector *conn) | |||||
{ | |||||
struct drm_mode_config *config = &conn->dev->mode_config; | |||||
#ifdef __linux__ | |||||
lockdep_assert_held(&config->connector_list_lock); | |||||
#endif | |||||
if (!refcount_dec_and_test(&conn->base.refcount.refcount)) | |||||
return; | |||||
llist_add(&conn->free_node, &config->connector_free_list); | |||||
schedule_work(&config->connector_free_work); | |||||
} | |||||
/** | |||||
* drm_connector_list_iter_next - return next connector | |||||
* @iter: connector_list iterator | |||||
* | |||||
* Returns the next connector for @iter, or NULL when the list walk has | |||||
* completed. | |||||
*/ | |||||
struct drm_connector * | |||||
drm_connector_list_iter_next(struct drm_connector_list_iter *iter) | |||||
{ | |||||
struct drm_connector *old_conn = iter->conn; | |||||
struct drm_mode_config *config = &iter->dev->mode_config; | |||||
struct list_head *lhead; | |||||
unsigned long flags; | |||||
spin_lock_irqsave(&config->connector_list_lock, flags); | |||||
lhead = old_conn ? &old_conn->head : &config->connector_list; | |||||
do { | |||||
if (lhead->next == &config->connector_list) { | |||||
iter->conn = NULL; | |||||
break; | |||||
} | |||||
lhead = lhead->next; | |||||
iter->conn = list_entry(lhead, struct drm_connector, head); | |||||
/* loop until it's not a zombie connector */ | |||||
} while (!kref_get_unless_zero(&iter->conn->base.refcount)); | |||||
if (old_conn) | |||||
__drm_connector_put_safe(old_conn); | |||||
spin_unlock_irqrestore(&config->connector_list_lock, flags); | |||||
return iter->conn; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_list_iter_next); | |||||
/** | |||||
* drm_connector_list_iter_end - tear down a connector_list iterator | |||||
* @iter: connector_list iterator | |||||
* | |||||
* Tears down @iter and releases any resources (like &drm_connector references) | |||||
* acquired while walking the list. This must always be called, both when the | |||||
* iteration completes fully or when it was aborted without walking the entire | |||||
* list. | |||||
*/ | |||||
void drm_connector_list_iter_end(struct drm_connector_list_iter *iter) | |||||
{ | |||||
struct drm_mode_config *config = &iter->dev->mode_config; | |||||
unsigned long flags; | |||||
iter->dev = NULL; | |||||
if (iter->conn) { | |||||
spin_lock_irqsave(&config->connector_list_lock, flags); | |||||
__drm_connector_put_safe(iter->conn); | |||||
spin_unlock_irqrestore(&config->connector_list_lock, flags); | |||||
} | |||||
lock_release(&connector_list_iter_dep_map, 0, _RET_IP_); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_list_iter_end); | |||||
static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { | |||||
{ SubPixelUnknown, "Unknown" }, | |||||
{ SubPixelHorizontalRGB, "Horizontal RGB" }, | |||||
{ SubPixelHorizontalBGR, "Horizontal BGR" }, | |||||
{ SubPixelVerticalRGB, "Vertical RGB" }, | |||||
{ SubPixelVerticalBGR, "Vertical BGR" }, | |||||
{ SubPixelNone, "None" }, | |||||
}; | |||||
/** | |||||
* drm_get_subpixel_order_name - return a string for a given subpixel enum | |||||
* @order: enum of subpixel_order | |||||
* | |||||
* Note you could abuse this and return something out of bounds, but that | |||||
* would be a caller error. No unscrubbed user data should make it here. | |||||
*/ | |||||
const char *drm_get_subpixel_order_name(enum subpixel_order order) | |||||
{ | |||||
return drm_subpixel_enum_list[order].name; | |||||
} | |||||
EXPORT_SYMBOL(drm_get_subpixel_order_name); | |||||
static const struct drm_prop_enum_list drm_dpms_enum_list[] = { | |||||
{ DRM_MODE_DPMS_ON, "On" }, | |||||
{ DRM_MODE_DPMS_STANDBY, "Standby" }, | |||||
{ DRM_MODE_DPMS_SUSPEND, "Suspend" }, | |||||
{ DRM_MODE_DPMS_OFF, "Off" } | |||||
}; | |||||
DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) | |||||
static const struct drm_prop_enum_list drm_link_status_enum_list[] = { | |||||
{ DRM_MODE_LINK_STATUS_GOOD, "Good" }, | |||||
{ DRM_MODE_LINK_STATUS_BAD, "Bad" }, | |||||
}; | |||||
/** | |||||
* drm_display_info_set_bus_formats - set the supported bus formats | |||||
* @info: display info to store bus formats in | |||||
* @formats: array containing the supported bus formats | |||||
* @num_formats: the number of entries in the fmts array | |||||
* | |||||
* Store the supported bus formats in display info structure. | |||||
* See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for | |||||
* a full list of available formats. | |||||
*/ | |||||
int drm_display_info_set_bus_formats(struct drm_display_info *info, | |||||
const u32 *formats, | |||||
unsigned int num_formats) | |||||
{ | |||||
u32 *fmts = NULL; | |||||
if (!formats && num_formats) | |||||
return -EINVAL; | |||||
if (formats && num_formats) { | |||||
fmts = kmemdup(formats, sizeof(*formats) * num_formats, | |||||
GFP_KERNEL); | |||||
if (!fmts) | |||||
return -ENOMEM; | |||||
} | |||||
kfree(info->bus_formats); | |||||
info->bus_formats = fmts; | |||||
info->num_bus_formats = num_formats; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_display_info_set_bus_formats); | |||||
/* Optional connector properties. */ | |||||
static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { | |||||
{ DRM_MODE_SCALE_NONE, "None" }, | |||||
{ DRM_MODE_SCALE_FULLSCREEN, "Full" }, | |||||
{ DRM_MODE_SCALE_CENTER, "Center" }, | |||||
{ DRM_MODE_SCALE_ASPECT, "Full aspect" }, | |||||
}; | |||||
static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { | |||||
{ DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, | |||||
{ DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, | |||||
{ DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, | |||||
}; | |||||
static const struct drm_prop_enum_list drm_content_type_enum_list[] = { | |||||
{ DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" }, | |||||
{ DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" }, | |||||
{ DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" }, | |||||
{ DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" }, | |||||
{ DRM_MODE_CONTENT_TYPE_GAME, "Game" }, | |||||
}; | |||||
static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = { | |||||
{ DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" }, | |||||
{ DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" }, | |||||
{ DRM_MODE_PANEL_ORIENTATION_LEFT_UP, "Left Side Up" }, | |||||
{ DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, "Right Side Up" }, | |||||
}; | |||||
static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { | |||||
{ DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |||||
{ DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |||||
}; | |||||
DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) | |||||
static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { | |||||
{ DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ | |||||
{ DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ | |||||
}; | |||||
DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, | |||||
drm_dvi_i_subconnector_enum_list) | |||||
static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { | |||||
{ DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |||||
}; | |||||
DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) | |||||
static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { | |||||
{ DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ | |||||
{ DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ | |||||
}; | |||||
DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, | |||||
drm_tv_subconnector_enum_list) | |||||
static const struct drm_prop_enum_list hdmi_colorspaces[] = { | |||||
/* For Default case, driver will set the colorspace */ | |||||
{ DRM_MODE_COLORIMETRY_DEFAULT, "Default" }, | |||||
/* Standard Definition Colorimetry based on CEA 861 */ | |||||
{ DRM_MODE_COLORIMETRY_SMPTE_170M_YCC, "SMPTE_170M_YCC" }, | |||||
{ DRM_MODE_COLORIMETRY_BT709_YCC, "BT709_YCC" }, | |||||
/* Standard Definition Colorimetry based on IEC 61966-2-4 */ | |||||
{ DRM_MODE_COLORIMETRY_XVYCC_601, "XVYCC_601" }, | |||||
/* High Definition Colorimetry based on IEC 61966-2-4 */ | |||||
{ DRM_MODE_COLORIMETRY_XVYCC_709, "XVYCC_709" }, | |||||
/* Colorimetry based on IEC 61966-2-1/Amendment 1 */ | |||||
{ DRM_MODE_COLORIMETRY_SYCC_601, "SYCC_601" }, | |||||
/* Colorimetry based on IEC 61966-2-5 [33] */ | |||||
{ DRM_MODE_COLORIMETRY_OPYCC_601, "opYCC_601" }, | |||||
/* Colorimetry based on IEC 61966-2-5 */ | |||||
{ DRM_MODE_COLORIMETRY_OPRGB, "opRGB" }, | |||||
/* Colorimetry based on ITU-R BT.2020 */ | |||||
{ DRM_MODE_COLORIMETRY_BT2020_CYCC, "BT2020_CYCC" }, | |||||
/* Colorimetry based on ITU-R BT.2020 */ | |||||
{ DRM_MODE_COLORIMETRY_BT2020_RGB, "BT2020_RGB" }, | |||||
/* Colorimetry based on ITU-R BT.2020 */ | |||||
{ DRM_MODE_COLORIMETRY_BT2020_YCC, "BT2020_YCC" }, | |||||
/* Added as part of Additional Colorimetry Extension in 861.G */ | |||||
{ DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65, "DCI-P3_RGB_D65" }, | |||||
{ DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER, "DCI-P3_RGB_Theater" }, | |||||
}; | |||||
/** | |||||
* DOC: standard connector properties | |||||
* | |||||
* DRM connectors have a few standardized properties: | |||||
* | |||||
* EDID: | |||||
* Blob property which contains the current EDID read from the sink. This | |||||
* is useful to parse sink identification information like vendor, model | |||||
* and serial. Drivers should update this property by calling | |||||
* drm_connector_update_edid_property(), usually after having parsed | |||||
* the EDID using drm_add_edid_modes(). Userspace cannot change this | |||||
* property. | |||||
* DPMS: | |||||
* Legacy property for setting the power state of the connector. For atomic | |||||
* drivers this is only provided for backwards compatibility with existing | |||||
* drivers, it remaps to controlling the "ACTIVE" property on the CRTC the | |||||
* connector is linked to. Drivers should never set this property directly, | |||||
* it is handled by the DRM core by calling the &drm_connector_funcs.dpms | |||||
* callback. For atomic drivers the remapping to the "ACTIVE" property is | |||||
* implemented in the DRM core. This is the only standard connector | |||||
* property that userspace can change. | |||||
* | |||||
* Note that this property cannot be set through the MODE_ATOMIC ioctl, | |||||
* userspace must use "ACTIVE" on the CRTC instead. | |||||
* | |||||
* WARNING: | |||||
* | |||||
* For userspace also running on legacy drivers the "DPMS" semantics are a | |||||
* lot more complicated. First, userspace cannot rely on the "DPMS" value | |||||
* returned by the GETCONNECTOR actually reflecting reality, because many | |||||
* drivers fail to update it. For atomic drivers this is taken care of in | |||||
* drm_atomic_helper_update_legacy_modeset_state(). | |||||
* | |||||
* The second issue is that the DPMS state is only well-defined when the | |||||
* connector is connected to a CRTC. In atomic the DRM core enforces that | |||||
* "ACTIVE" is off in such a case, no such checks exists for "DPMS". | |||||
* | |||||
* Finally, when enabling an output using the legacy SETCONFIG ioctl then | |||||
* "DPMS" is forced to ON. But see above, that might not be reflected in | |||||
* the software value on legacy drivers. | |||||
* | |||||
* Summarizing: Only set "DPMS" when the connector is known to be enabled, | |||||
* assume that a successful SETCONFIG call also sets "DPMS" to on, and | |||||
* never read back the value of "DPMS" because it can be incorrect. | |||||
* PATH: | |||||
* Connector path property to identify how this sink is physically | |||||
* connected. Used by DP MST. This should be set by calling | |||||
* drm_connector_set_path_property(), in the case of DP MST with the | |||||
* path property the MST manager created. Userspace cannot change this | |||||
* property. | |||||
* TILE: | |||||
* Connector tile group property to indicate how a set of DRM connector | |||||
* compose together into one logical screen. This is used by both high-res | |||||
* external screens (often only using a single cable, but exposing multiple | |||||
* DP MST sinks), or high-res integrated panels (like dual-link DSI) which | |||||
* are not gen-locked. Note that for tiled panels which are genlocked, like | |||||
* dual-link LVDS or dual-link DSI, the driver should try to not expose the | |||||
* tiling and virtualize both &drm_crtc and &drm_plane if needed. Drivers | |||||
* should update this value using drm_connector_set_tile_property(). | |||||
* Userspace cannot change this property. | |||||
* link-status: | |||||
* Connector link-status property to indicate the status of link. The | |||||
* default value of link-status is "GOOD". If something fails during or | |||||
* after modeset, the kernel driver may set this to "BAD" and issue a | |||||
* hotplug uevent. Drivers should update this value using | |||||
* drm_connector_set_link_status_property(). | |||||
* non_desktop: | |||||
* Indicates the output should be ignored for purposes of displaying a | |||||
* standard desktop environment or console. This is most likely because | |||||
* the output device is not rectilinear. | |||||
* Content Protection: | |||||
* This property is used by userspace to request the kernel protect future | |||||
* content communicated over the link. When requested, kernel will apply | |||||
* the appropriate means of protection (most often HDCP), and use the | |||||
* property to tell userspace the protection is active. | |||||
* | |||||
* Drivers can set this up by calling | |||||
* drm_connector_attach_content_protection_property() on initialization. | |||||
* | |||||
* The value of this property can be one of the following: | |||||
* | |||||
* DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0 | |||||
* The link is not protected, content is transmitted in the clear. | |||||
* DRM_MODE_CONTENT_PROTECTION_DESIRED = 1 | |||||
* Userspace has requested content protection, but the link is not | |||||
* currently protected. When in this state, kernel should enable | |||||
* Content Protection as soon as possible. | |||||
* DRM_MODE_CONTENT_PROTECTION_ENABLED = 2 | |||||
* Userspace has requested content protection, and the link is | |||||
* protected. Only the driver can set the property to this value. | |||||
* If userspace attempts to set to ENABLED, kernel will return | |||||
* -EINVAL. | |||||
* | |||||
* A few guidelines: | |||||
* | |||||
* - DESIRED state should be preserved until userspace de-asserts it by | |||||
* setting the property to UNDESIRED. This means ENABLED should only | |||||
* transition to UNDESIRED when the user explicitly requests it. | |||||
* - If the state is DESIRED, kernel should attempt to re-authenticate the | |||||
* link whenever possible. This includes across disable/enable, dpms, | |||||
* hotplug, downstream device changes, link status failures, etc.. | |||||
* - Kernel sends uevent with the connector id and property id through | |||||
* @drm_hdcp_update_content_protection, upon below kernel triggered | |||||
* scenarios: | |||||
* | |||||
* - DESIRED -> ENABLED (authentication success) | |||||
* - ENABLED -> DESIRED (termination of authentication) | |||||
* - Please note no uevents for userspace triggered property state changes, | |||||
* which can't fail such as | |||||
* | |||||
* - DESIRED/ENABLED -> UNDESIRED | |||||
* - UNDESIRED -> DESIRED | |||||
* - Userspace is responsible for polling the property or listen to uevents | |||||
* to determine when the value transitions from ENABLED to DESIRED. | |||||
* This signifies the link is no longer protected and userspace should | |||||
* take appropriate action (whatever that might be). | |||||
* | |||||
* HDCP Content Type: | |||||
* This Enum property is used by the userspace to declare the content type | |||||
* of the display stream, to kernel. Here display stream stands for any | |||||
* display content that userspace intended to display through HDCP | |||||
* encryption. | |||||
* | |||||
* Content Type of a stream is decided by the owner of the stream, as | |||||
* "HDCP Type0" or "HDCP Type1". | |||||
* | |||||
* The value of the property can be one of the below: | |||||
* - "HDCP Type0": DRM_MODE_HDCP_CONTENT_TYPE0 = 0 | |||||
* - "HDCP Type1": DRM_MODE_HDCP_CONTENT_TYPE1 = 1 | |||||
* | |||||
* When kernel starts the HDCP authentication (see "Content Protection" | |||||
* for details), it uses the content type in "HDCP Content Type" | |||||
* for performing the HDCP authentication with the display sink. | |||||
* | |||||
* Please note in HDCP spec versions, a link can be authenticated with | |||||
* HDCP 2.2 for Content Type 0/Content Type 1. Where as a link can be | |||||
* authenticated with HDCP1.4 only for Content Type 0(though it is implicit | |||||
* in nature. As there is no reference for Content Type in HDCP1.4). | |||||
* | |||||
* HDCP2.2 authentication protocol itself takes the "Content Type" as a | |||||
* parameter, which is a input for the DP HDCP2.2 encryption algo. | |||||
* | |||||
* In case of Type 0 content protection request, kernel driver can choose | |||||
* either of HDCP spec versions 1.4 and 2.2. When HDCP2.2 is used for | |||||
* "HDCP Type 0", a HDCP 2.2 capable repeater in the downstream can send | |||||
* that content to a HDCP 1.4 authenticated HDCP sink (Type0 link). | |||||
* But if the content is classified as "HDCP Type 1", above mentioned | |||||
* HDCP 2.2 repeater wont send the content to the HDCP sink as it can't | |||||
* authenticate the HDCP1.4 capable sink for "HDCP Type 1". | |||||
* | |||||
* Please note userspace can be ignorant of the HDCP versions used by the | |||||
* kernel driver to achieve the "HDCP Content Type". | |||||
* | |||||
* At current scenario, classifying a content as Type 1 ensures that the | |||||
* content will be displayed only through the HDCP2.2 encrypted link. | |||||
* | |||||
* Note that the HDCP Content Type property is introduced at HDCP 2.2, and | |||||
* defaults to type 0. It is only exposed by drivers supporting HDCP 2.2 | |||||
* (hence supporting Type 0 and Type 1). Based on how next versions of | |||||
* HDCP specs are defined content Type could be used for higher versions | |||||
* too. | |||||
* | |||||
* If content type is changed when "Content Protection" is not UNDESIRED, | |||||
* then kernel will disable the HDCP and re-enable with new type in the | |||||
* same atomic commit. And when "Content Protection" is ENABLED, it means | |||||
* that link is HDCP authenticated and encrypted, for the transmission of | |||||
* the Type of stream mentioned at "HDCP Content Type". | |||||
* | |||||
* HDR_OUTPUT_METADATA: | |||||
* Connector property to enable userspace to send HDR Metadata to | |||||
* driver. This metadata is based on the composition and blending | |||||
* policies decided by user, taking into account the hardware and | |||||
* sink capabilities. The driver gets this metadata and creates a | |||||
* Dynamic Range and Mastering Infoframe (DRM) in case of HDMI, | |||||
* SDP packet (Non-audio INFOFRAME SDP v1.3) for DP. This is then | |||||
* sent to sink. This notifies the sink of the upcoming frame's Color | |||||
* Encoding and Luminance parameters. | |||||
* | |||||
* Userspace first need to detect the HDR capabilities of sink by | |||||
* reading and parsing the EDID. Details of HDR metadata for HDMI | |||||
* are added in CTA 861.G spec. For DP , its defined in VESA DP | |||||
* Standard v1.4. It needs to then get the metadata information | |||||
* of the video/game/app content which are encoded in HDR (basically | |||||
* using HDR transfer functions). With this information it needs to | |||||
* decide on a blending policy and compose the relevant | |||||
* layers/overlays into a common format. Once this blending is done, | |||||
* userspace will be aware of the metadata of the composed frame to | |||||
* be send to sink. It then uses this property to communicate this | |||||
* metadata to driver which then make a Infoframe packet and sends | |||||
* to sink based on the type of encoder connected. | |||||
* | |||||
* Userspace will be responsible to do Tone mapping operation in case: | |||||
* - Some layers are HDR and others are SDR | |||||
* - HDR layers luminance is not same as sink | |||||
* | |||||
* It will even need to do colorspace conversion and get all layers | |||||
* to one common colorspace for blending. It can use either GL, Media | |||||
* or display engine to get this done based on the capabilties of the | |||||
* associated hardware. | |||||
* | |||||
* Driver expects metadata to be put in &struct hdr_output_metadata | |||||
* structure from userspace. This is received as blob and stored in | |||||
* &drm_connector_state.hdr_output_metadata. It parses EDID and saves the | |||||
* sink metadata in &struct hdr_sink_metadata, as | |||||
* &drm_connector.hdr_sink_metadata. Driver uses | |||||
* drm_hdmi_infoframe_set_hdr_metadata() helper to set the HDR metadata, | |||||
* hdmi_drm_infoframe_pack() to pack the infoframe as per spec, in case of | |||||
* HDMI encoder. | |||||
* | |||||
* max bpc: | |||||
* This range property is used by userspace to limit the bit depth. When | |||||
* used the driver would limit the bpc in accordance with the valid range | |||||
* supported by the hardware and sink. Drivers to use the function | |||||
* drm_connector_attach_max_bpc_property() to create and attach the | |||||
* property to the connector during initialization. | |||||
* | |||||
* Connectors also have one standardized atomic property: | |||||
* | |||||
* CRTC_ID: | |||||
* Mode object ID of the &drm_crtc this connector should be connected to. | |||||
* | |||||
* Connectors for LCD panels may also have one standardized property: | |||||
* | |||||
* panel orientation: | |||||
* On some devices the LCD panel is mounted in the casing in such a way | |||||
* that the up/top side of the panel does not match with the top side of | |||||
* the device. Userspace can use this property to check for this. | |||||
* Note that input coordinates from touchscreens (input devices with | |||||
* INPUT_PROP_DIRECT) will still map 1:1 to the actual LCD panel | |||||
* coordinates, so if userspace rotates the picture to adjust for | |||||
* the orientation it must also apply the same transformation to the | |||||
* touchscreen input coordinates. This property is initialized by calling | |||||
* drm_connector_init_panel_orientation_property(). | |||||
* | |||||
* scaling mode: | |||||
* This property defines how a non-native mode is upscaled to the native | |||||
* mode of an LCD panel: | |||||
* | |||||
* None: | |||||
* No upscaling happens, scaling is left to the panel. Not all | |||||
* drivers expose this mode. | |||||
* Full: | |||||
* The output is upscaled to the full resolution of the panel, | |||||
* ignoring the aspect ratio. | |||||
* Center: | |||||
* No upscaling happens, the output is centered within the native | |||||
* resolution the panel. | |||||
* Full aspect: | |||||
* The output is upscaled to maximize either the width or height | |||||
* while retaining the aspect ratio. | |||||
* | |||||
* This property should be set up by calling | |||||
* drm_connector_attach_scaling_mode_property(). Note that drivers | |||||
* can also expose this property to external outputs, in which case they | |||||
* must support "None", which should be the default (since external screens | |||||
* have a built-in scaler). | |||||
*/ | |||||
int drm_connector_create_standard_properties(struct drm_device *dev) | |||||
{ | |||||
struct drm_property *prop; | |||||
prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | | |||||
DRM_MODE_PROP_IMMUTABLE, | |||||
"EDID", 0); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.edid_property = prop; | |||||
prop = drm_property_create_enum(dev, 0, | |||||
"DPMS", drm_dpms_enum_list, | |||||
ARRAY_SIZE(drm_dpms_enum_list)); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.dpms_property = prop; | |||||
prop = drm_property_create(dev, | |||||
DRM_MODE_PROP_BLOB | | |||||
DRM_MODE_PROP_IMMUTABLE, | |||||
"PATH", 0); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.path_property = prop; | |||||
prop = drm_property_create(dev, | |||||
DRM_MODE_PROP_BLOB | | |||||
DRM_MODE_PROP_IMMUTABLE, | |||||
"TILE", 0); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.tile_property = prop; | |||||
prop = drm_property_create_enum(dev, 0, "link-status", | |||||
drm_link_status_enum_list, | |||||
ARRAY_SIZE(drm_link_status_enum_list)); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.link_status_property = prop; | |||||
prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, "non-desktop"); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.non_desktop_property = prop; | |||||
prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, | |||||
"HDR_OUTPUT_METADATA", 0); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.hdr_output_metadata_property = prop; | |||||
return 0; | |||||
} | |||||
/** | |||||
* drm_mode_create_dvi_i_properties - create DVI-I specific connector properties | |||||
* @dev: DRM device | |||||
* | |||||
* Called by a driver the first time a DVI-I connector is made. | |||||
*/ | |||||
int drm_mode_create_dvi_i_properties(struct drm_device *dev) | |||||
{ | |||||
struct drm_property *dvi_i_selector; | |||||
struct drm_property *dvi_i_subconnector; | |||||
if (dev->mode_config.dvi_i_select_subconnector_property) | |||||
return 0; | |||||
dvi_i_selector = | |||||
drm_property_create_enum(dev, 0, | |||||
"select subconnector", | |||||
drm_dvi_i_select_enum_list, | |||||
ARRAY_SIZE(drm_dvi_i_select_enum_list)); | |||||
dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; | |||||
dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |||||
"subconnector", | |||||
drm_dvi_i_subconnector_enum_list, | |||||
ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); | |||||
dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); | |||||
/** | |||||
* DOC: HDMI connector properties | |||||
* | |||||
* content type (HDMI specific): | |||||
* Indicates content type setting to be used in HDMI infoframes to indicate | |||||
* content type for the external device, so that it adjusts its display | |||||
* settings accordingly. | |||||
* | |||||
* The value of this property can be one of the following: | |||||
* | |||||
* No Data: | |||||
* Content type is unknown | |||||
* Graphics: | |||||
* Content type is graphics | |||||
* Photo: | |||||
* Content type is photo | |||||
* Cinema: | |||||
* Content type is cinema | |||||
* Game: | |||||
* Content type is game | |||||
* | |||||
* Drivers can set up this property by calling | |||||
* drm_connector_attach_content_type_property(). Decoding to | |||||
* infoframe values is done through drm_hdmi_avi_infoframe_content_type(). | |||||
*/ | |||||
/** | |||||
* drm_connector_attach_content_type_property - attach content-type property | |||||
* @connector: connector to attach content type property on. | |||||
* | |||||
* Called by a driver the first time a HDMI connector is made. | |||||
*/ | |||||
int drm_connector_attach_content_type_property(struct drm_connector *connector) | |||||
{ | |||||
if (!drm_mode_create_content_type_property(connector->dev)) | |||||
drm_object_attach_property(&connector->base, | |||||
connector->dev->mode_config.content_type_property, | |||||
DRM_MODE_CONTENT_TYPE_NO_DATA); | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_content_type_property); | |||||
/** | |||||
* drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe | |||||
* content type information, based | |||||
* on correspondent DRM property. | |||||
* @frame: HDMI AVI infoframe | |||||
* @conn_state: DRM display connector state | |||||
* | |||||
*/ | |||||
void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, | |||||
const struct drm_connector_state *conn_state) | |||||
{ | |||||
switch (conn_state->content_type) { | |||||
case DRM_MODE_CONTENT_TYPE_GRAPHICS: | |||||
frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; | |||||
break; | |||||
case DRM_MODE_CONTENT_TYPE_CINEMA: | |||||
frame->content_type = HDMI_CONTENT_TYPE_CINEMA; | |||||
break; | |||||
case DRM_MODE_CONTENT_TYPE_GAME: | |||||
frame->content_type = HDMI_CONTENT_TYPE_GAME; | |||||
break; | |||||
case DRM_MODE_CONTENT_TYPE_PHOTO: | |||||
frame->content_type = HDMI_CONTENT_TYPE_PHOTO; | |||||
break; | |||||
default: | |||||
/* Graphics is the default(0) */ | |||||
frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; | |||||
} | |||||
frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; | |||||
} | |||||
EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); | |||||
/** | |||||
* drm_mode_attach_tv_margin_properties - attach TV connector margin properties | |||||
* @connector: DRM connector | |||||
* | |||||
* Called by a driver when it needs to attach TV margin props to a connector. | |||||
* Typically used on SDTV and HDMI connectors. | |||||
*/ | |||||
void drm_connector_attach_tv_margin_properties(struct drm_connector *connector) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
drm_object_attach_property(&connector->base, | |||||
dev->mode_config.tv_left_margin_property, | |||||
0); | |||||
drm_object_attach_property(&connector->base, | |||||
dev->mode_config.tv_right_margin_property, | |||||
0); | |||||
drm_object_attach_property(&connector->base, | |||||
dev->mode_config.tv_top_margin_property, | |||||
0); | |||||
drm_object_attach_property(&connector->base, | |||||
dev->mode_config.tv_bottom_margin_property, | |||||
0); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties); | |||||
/** | |||||
* drm_mode_create_tv_margin_properties - create TV connector margin properties | |||||
* @dev: DRM device | |||||
* | |||||
* Called by a driver's HDMI connector initialization routine, this function | |||||
* creates the TV margin properties for a given device. No need to call this | |||||
* function for an SDTV connector, it's already called from | |||||
* drm_mode_create_tv_properties(). | |||||
*/ | |||||
int drm_mode_create_tv_margin_properties(struct drm_device *dev) | |||||
{ | |||||
if (dev->mode_config.tv_left_margin_property) | |||||
return 0; | |||||
dev->mode_config.tv_left_margin_property = | |||||
drm_property_create_range(dev, 0, "left margin", 0, 100); | |||||
if (!dev->mode_config.tv_left_margin_property) | |||||
return -ENOMEM; | |||||
dev->mode_config.tv_right_margin_property = | |||||
drm_property_create_range(dev, 0, "right margin", 0, 100); | |||||
if (!dev->mode_config.tv_right_margin_property) | |||||
return -ENOMEM; | |||||
dev->mode_config.tv_top_margin_property = | |||||
drm_property_create_range(dev, 0, "top margin", 0, 100); | |||||
if (!dev->mode_config.tv_top_margin_property) | |||||
return -ENOMEM; | |||||
dev->mode_config.tv_bottom_margin_property = | |||||
drm_property_create_range(dev, 0, "bottom margin", 0, 100); | |||||
if (!dev->mode_config.tv_bottom_margin_property) | |||||
return -ENOMEM; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_tv_margin_properties); | |||||
/** | |||||
* drm_mode_create_tv_properties - create TV specific connector properties | |||||
* @dev: DRM device | |||||
* @num_modes: number of different TV formats (modes) supported | |||||
* @modes: array of pointers to strings containing name of each format | |||||
* | |||||
* Called by a driver's TV initialization routine, this function creates | |||||
* the TV specific connector properties for a given device. Caller is | |||||
* responsible for allocating a list of format names and passing them to | |||||
* this routine. | |||||
*/ | |||||
int drm_mode_create_tv_properties(struct drm_device *dev, | |||||
unsigned int num_modes, | |||||
const char * const modes[]) | |||||
{ | |||||
struct drm_property *tv_selector; | |||||
struct drm_property *tv_subconnector; | |||||
unsigned int i; | |||||
if (dev->mode_config.tv_select_subconnector_property) | |||||
return 0; | |||||
/* | |||||
* Basic connector properties | |||||
*/ | |||||
tv_selector = drm_property_create_enum(dev, 0, | |||||
"select subconnector", | |||||
drm_tv_select_enum_list, | |||||
ARRAY_SIZE(drm_tv_select_enum_list)); | |||||
if (!tv_selector) | |||||
goto nomem; | |||||
dev->mode_config.tv_select_subconnector_property = tv_selector; | |||||
tv_subconnector = | |||||
drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |||||
"subconnector", | |||||
drm_tv_subconnector_enum_list, | |||||
ARRAY_SIZE(drm_tv_subconnector_enum_list)); | |||||
if (!tv_subconnector) | |||||
goto nomem; | |||||
dev->mode_config.tv_subconnector_property = tv_subconnector; | |||||
/* | |||||
* Other, TV specific properties: margins & TV modes. | |||||
*/ | |||||
if (drm_mode_create_tv_margin_properties(dev)) | |||||
goto nomem; | |||||
dev->mode_config.tv_mode_property = | |||||
drm_property_create(dev, DRM_MODE_PROP_ENUM, | |||||
"mode", num_modes); | |||||
if (!dev->mode_config.tv_mode_property) | |||||
goto nomem; | |||||
for (i = 0; i < num_modes; i++) | |||||
drm_property_add_enum(dev->mode_config.tv_mode_property, | |||||
i, modes[i]); | |||||
dev->mode_config.tv_brightness_property = | |||||
drm_property_create_range(dev, 0, "brightness", 0, 100); | |||||
if (!dev->mode_config.tv_brightness_property) | |||||
goto nomem; | |||||
dev->mode_config.tv_contrast_property = | |||||
drm_property_create_range(dev, 0, "contrast", 0, 100); | |||||
if (!dev->mode_config.tv_contrast_property) | |||||
goto nomem; | |||||
dev->mode_config.tv_flicker_reduction_property = | |||||
drm_property_create_range(dev, 0, "flicker reduction", 0, 100); | |||||
if (!dev->mode_config.tv_flicker_reduction_property) | |||||
goto nomem; | |||||
dev->mode_config.tv_overscan_property = | |||||
drm_property_create_range(dev, 0, "overscan", 0, 100); | |||||
if (!dev->mode_config.tv_overscan_property) | |||||
goto nomem; | |||||
dev->mode_config.tv_saturation_property = | |||||
drm_property_create_range(dev, 0, "saturation", 0, 100); | |||||
if (!dev->mode_config.tv_saturation_property) | |||||
goto nomem; | |||||
dev->mode_config.tv_hue_property = | |||||
drm_property_create_range(dev, 0, "hue", 0, 100); | |||||
if (!dev->mode_config.tv_hue_property) | |||||
goto nomem; | |||||
return 0; | |||||
nomem: | |||||
return -ENOMEM; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_tv_properties); | |||||
/** | |||||
* drm_mode_create_scaling_mode_property - create scaling mode property | |||||
* @dev: DRM device | |||||
* | |||||
* Called by a driver the first time it's needed, must be attached to desired | |||||
* connectors. | |||||
* | |||||
* Atomic drivers should use drm_connector_attach_scaling_mode_property() | |||||
* instead to correctly assign &drm_connector_state.picture_aspect_ratio | |||||
* in the atomic state. | |||||
*/ | |||||
int drm_mode_create_scaling_mode_property(struct drm_device *dev) | |||||
{ | |||||
struct drm_property *scaling_mode; | |||||
if (dev->mode_config.scaling_mode_property) | |||||
return 0; | |||||
scaling_mode = | |||||
drm_property_create_enum(dev, 0, "scaling mode", | |||||
drm_scaling_mode_enum_list, | |||||
ARRAY_SIZE(drm_scaling_mode_enum_list)); | |||||
dev->mode_config.scaling_mode_property = scaling_mode; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); | |||||
/** | |||||
* DOC: Variable refresh properties | |||||
* | |||||
* Variable refresh rate capable displays can dynamically adjust their | |||||
* refresh rate by extending the duration of their vertical front porch | |||||
* until page flip or timeout occurs. This can reduce or remove stuttering | |||||
* and latency in scenarios where the page flip does not align with the | |||||
* vblank interval. | |||||
* | |||||
* An example scenario would be an application flipping at a constant rate | |||||
* of 48Hz on a 60Hz display. The page flip will frequently miss the vblank | |||||
* interval and the same contents will be displayed twice. This can be | |||||
* observed as stuttering for content with motion. | |||||
* | |||||
* If variable refresh rate was active on a display that supported a | |||||
* variable refresh range from 35Hz to 60Hz no stuttering would be observable | |||||
* for the example scenario. The minimum supported variable refresh rate of | |||||
* 35Hz is below the page flip frequency and the vertical front porch can | |||||
* be extended until the page flip occurs. The vblank interval will be | |||||
* directly aligned to the page flip rate. | |||||
* | |||||
* Not all userspace content is suitable for use with variable refresh rate. | |||||
* Large and frequent changes in vertical front porch duration may worsen | |||||
* perceived stuttering for input sensitive applications. | |||||
* | |||||
* Panel brightness will also vary with vertical front porch duration. Some | |||||
* panels may have noticeable differences in brightness between the minimum | |||||
* vertical front porch duration and the maximum vertical front porch duration. | |||||
* Large and frequent changes in vertical front porch duration may produce | |||||
* observable flickering for such panels. | |||||
* | |||||
* Userspace control for variable refresh rate is supported via properties | |||||
* on the &drm_connector and &drm_crtc objects. | |||||
* | |||||
* "vrr_capable": | |||||
* Optional &drm_connector boolean property that drivers should attach | |||||
* with drm_connector_attach_vrr_capable_property() on connectors that | |||||
* could support variable refresh rates. Drivers should update the | |||||
* property value by calling drm_connector_set_vrr_capable_property(). | |||||
* | |||||
* Absence of the property should indicate absence of support. | |||||
* | |||||
* "VRR_ENABLED": | |||||
* Default &drm_crtc boolean property that notifies the driver that the | |||||
* content on the CRTC is suitable for variable refresh rate presentation. | |||||
* The driver will take this property as a hint to enable variable | |||||
* refresh rate support if the receiver supports it, ie. if the | |||||
* "vrr_capable" property is true on the &drm_connector object. The | |||||
* vertical front porch duration will be extended until page-flip or | |||||
* timeout when enabled. | |||||
* | |||||
* The minimum vertical front porch duration is defined as the vertical | |||||
* front porch duration for the current mode. | |||||
* | |||||
* The maximum vertical front porch duration is greater than or equal to | |||||
* the minimum vertical front porch duration. The duration is derived | |||||
* from the minimum supported variable refresh rate for the connector. | |||||
* | |||||
* The driver may place further restrictions within these minimum | |||||
* and maximum bounds. | |||||
*/ | |||||
/** | |||||
* drm_connector_attach_vrr_capable_property - creates the | |||||
* vrr_capable property | |||||
* @connector: connector to create the vrr_capable property on. | |||||
* | |||||
* This is used by atomic drivers to add support for querying | |||||
* variable refresh rate capability for a connector. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errono on failure. | |||||
*/ | |||||
int drm_connector_attach_vrr_capable_property( | |||||
struct drm_connector *connector) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
struct drm_property *prop; | |||||
if (!connector->vrr_capable_property) { | |||||
prop = drm_property_create_bool(dev, DRM_MODE_PROP_IMMUTABLE, | |||||
"vrr_capable"); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
connector->vrr_capable_property = prop; | |||||
drm_object_attach_property(&connector->base, prop, 0); | |||||
} | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_vrr_capable_property); | |||||
/** | |||||
* drm_connector_attach_scaling_mode_property - attach atomic scaling mode property | |||||
* @connector: connector to attach scaling mode property on. | |||||
* @scaling_mode_mask: or'ed mask of BIT(%DRM_MODE_SCALE_\*). | |||||
* | |||||
* This is used to add support for scaling mode to atomic drivers. | |||||
* The scaling mode will be set to &drm_connector_state.picture_aspect_ratio | |||||
* and can be used from &drm_connector_helper_funcs->atomic_check for validation. | |||||
* | |||||
* This is the atomic version of drm_mode_create_scaling_mode_property(). | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, | |||||
u32 scaling_mode_mask) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
struct drm_property *scaling_mode_property; | |||||
int i; | |||||
const unsigned valid_scaling_mode_mask = | |||||
(1U << ARRAY_SIZE(drm_scaling_mode_enum_list)) - 1; | |||||
if (WARN_ON(hweight32(scaling_mode_mask) < 2 || | |||||
scaling_mode_mask & ~valid_scaling_mode_mask)) | |||||
return -EINVAL; | |||||
scaling_mode_property = | |||||
drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode", | |||||
hweight32(scaling_mode_mask)); | |||||
if (!scaling_mode_property) | |||||
return -ENOMEM; | |||||
for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++) { | |||||
int ret; | |||||
if (!(BIT(i) & scaling_mode_mask)) | |||||
continue; | |||||
ret = drm_property_add_enum(scaling_mode_property, | |||||
drm_scaling_mode_enum_list[i].type, | |||||
drm_scaling_mode_enum_list[i].name); | |||||
if (ret) { | |||||
drm_property_destroy(dev, scaling_mode_property); | |||||
return ret; | |||||
} | |||||
} | |||||
drm_object_attach_property(&connector->base, | |||||
scaling_mode_property, 0); | |||||
connector->scaling_mode_property = scaling_mode_property; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); | |||||
/** | |||||
* drm_mode_create_aspect_ratio_property - create aspect ratio property | |||||
* @dev: DRM device | |||||
* | |||||
* Called by a driver the first time it's needed, must be attached to desired | |||||
* connectors. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_mode_create_aspect_ratio_property(struct drm_device *dev) | |||||
{ | |||||
if (dev->mode_config.aspect_ratio_property) | |||||
return 0; | |||||
dev->mode_config.aspect_ratio_property = | |||||
drm_property_create_enum(dev, 0, "aspect ratio", | |||||
drm_aspect_ratio_enum_list, | |||||
ARRAY_SIZE(drm_aspect_ratio_enum_list)); | |||||
if (dev->mode_config.aspect_ratio_property == NULL) | |||||
return -ENOMEM; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); | |||||
/** | |||||
* DOC: standard connector properties | |||||
* | |||||
* Colorspace: | |||||
* drm_mode_create_colorspace_property - create colorspace property | |||||
* This property helps select a suitable colorspace based on the sink | |||||
* capability. Modern sink devices support wider gamut like BT2020. | |||||
* This helps switch to BT2020 mode if the BT2020 encoded video stream | |||||
* is being played by the user, same for any other colorspace. Thereby | |||||
* giving a good visual experience to users. | |||||
* | |||||
* The expectation from userspace is that it should parse the EDID | |||||
* and get supported colorspaces. Use this property and switch to the | |||||
* one supported. Sink supported colorspaces should be retrieved by | |||||
* userspace from EDID and driver will not explicitly expose them. | |||||
* | |||||
* Basically the expectation from userspace is: | |||||
* - Set up CRTC DEGAMMA/CTM/GAMMA to convert to some sink | |||||
* colorspace | |||||
* - Set this new property to let the sink know what it | |||||
* converted the CRTC output to. | |||||
* - This property is just to inform sink what colorspace | |||||
* source is trying to drive. | |||||
* | |||||
* Called by a driver the first time it's needed, must be attached to desired | |||||
* connectors. | |||||
*/ | |||||
int drm_mode_create_colorspace_property(struct drm_connector *connector) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
struct drm_property *prop; | |||||
if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA || | |||||
connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) { | |||||
prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM, | |||||
"Colorspace", | |||||
hdmi_colorspaces, | |||||
ARRAY_SIZE(hdmi_colorspaces)); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
} else { | |||||
DRM_DEBUG_KMS("Colorspace property not supported\n"); | |||||
return 0; | |||||
} | |||||
connector->colorspace_property = prop; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_colorspace_property); | |||||
/** | |||||
* drm_mode_create_content_type_property - create content type property | |||||
* @dev: DRM device | |||||
* | |||||
* Called by a driver the first time it's needed, must be attached to desired | |||||
* connectors. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_mode_create_content_type_property(struct drm_device *dev) | |||||
{ | |||||
if (dev->mode_config.content_type_property) | |||||
return 0; | |||||
dev->mode_config.content_type_property = | |||||
drm_property_create_enum(dev, 0, "content type", | |||||
drm_content_type_enum_list, | |||||
ARRAY_SIZE(drm_content_type_enum_list)); | |||||
if (dev->mode_config.content_type_property == NULL) | |||||
return -ENOMEM; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_content_type_property); | |||||
/** | |||||
* drm_mode_create_suggested_offset_properties - create suggests offset properties | |||||
* @dev: DRM device | |||||
* | |||||
* Create the the suggested x/y offset property for connectors. | |||||
*/ | |||||
int drm_mode_create_suggested_offset_properties(struct drm_device *dev) | |||||
{ | |||||
if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) | |||||
return 0; | |||||
dev->mode_config.suggested_x_property = | |||||
drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); | |||||
dev->mode_config.suggested_y_property = | |||||
drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); | |||||
if (dev->mode_config.suggested_x_property == NULL || | |||||
dev->mode_config.suggested_y_property == NULL) | |||||
return -ENOMEM; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); | |||||
/** | |||||
* drm_connector_set_path_property - set tile property on connector | |||||
* @connector: connector to set property on. | |||||
* @path: path to use for property; must not be NULL. | |||||
* | |||||
* This creates a property to expose to userspace to specify a | |||||
* connector path. This is mainly used for DisplayPort MST where | |||||
* connectors have a topology and we want to allow userspace to give | |||||
* them more meaningful names. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_connector_set_path_property(struct drm_connector *connector, | |||||
const char *path) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
int ret; | |||||
ret = drm_property_replace_global_blob(dev, | |||||
&connector->path_blob_ptr, | |||||
strlen(path) + 1, | |||||
path, | |||||
&connector->base, | |||||
dev->mode_config.path_property); | |||||
return ret; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_set_path_property); | |||||
/** | |||||
* drm_connector_set_tile_property - set tile property on connector | |||||
* @connector: connector to set property on. | |||||
* | |||||
* This looks up the tile information for a connector, and creates a | |||||
* property for userspace to parse if it exists. The property is of | |||||
* the form of 8 integers using ':' as a separator. | |||||
* This is used for dual port tiled displays with DisplayPort SST | |||||
* or DisplayPort MST connectors. | |||||
* | |||||
* Returns: | |||||
* Zero on success, errno on failure. | |||||
*/ | |||||
int drm_connector_set_tile_property(struct drm_connector *connector) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
char tile[256]; | |||||
int ret; | |||||
if (!connector->has_tile) { | |||||
ret = drm_property_replace_global_blob(dev, | |||||
&connector->tile_blob_ptr, | |||||
0, | |||||
NULL, | |||||
&connector->base, | |||||
dev->mode_config.tile_property); | |||||
return ret; | |||||
} | |||||
snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", | |||||
connector->tile_group->id, connector->tile_is_single_monitor, | |||||
connector->num_h_tile, connector->num_v_tile, | |||||
connector->tile_h_loc, connector->tile_v_loc, | |||||
connector->tile_h_size, connector->tile_v_size); | |||||
ret = drm_property_replace_global_blob(dev, | |||||
&connector->tile_blob_ptr, | |||||
strlen(tile) + 1, | |||||
tile, | |||||
&connector->base, | |||||
dev->mode_config.tile_property); | |||||
return ret; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_set_tile_property); | |||||
/** | |||||
* drm_connector_update_edid_property - update the edid property of a connector | |||||
* @connector: drm connector | |||||
* @edid: new value of the edid property | |||||
* | |||||
* This function creates a new blob modeset object and assigns its id to the | |||||
* connector's edid property. | |||||
* Since we also parse tile information from EDID's displayID block, we also | |||||
* set the connector's tile property here. See drm_connector_set_tile_property() | |||||
* for more details. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_connector_update_edid_property(struct drm_connector *connector, | |||||
const struct edid *edid) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
size_t size = 0; | |||||
int ret; | |||||
/* ignore requests to set edid when overridden */ | |||||
if (connector->override_edid) | |||||
return 0; | |||||
if (edid) | |||||
size = EDID_LENGTH * (1 + edid->extensions); | |||||
/* Set the display info, using edid if available, otherwise | |||||
* reseting the values to defaults. This duplicates the work | |||||
* done in drm_add_edid_modes, but that function is not | |||||
* consistently called before this one in all drivers and the | |||||
* computation is cheap enough that it seems better to | |||||
* duplicate it rather than attempt to ensure some arbitrary | |||||
* ordering of calls. | |||||
*/ | |||||
if (edid) | |||||
drm_add_display_info(connector, edid); | |||||
else | |||||
drm_reset_display_info(connector); | |||||
drm_object_property_set_value(&connector->base, | |||||
dev->mode_config.non_desktop_property, | |||||
connector->display_info.non_desktop); | |||||
ret = drm_property_replace_global_blob(dev, | |||||
&connector->edid_blob_ptr, | |||||
size, | |||||
edid, | |||||
&connector->base, | |||||
dev->mode_config.edid_property); | |||||
if (ret) | |||||
return ret; | |||||
return drm_connector_set_tile_property(connector); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_update_edid_property); | |||||
/** | |||||
* drm_connector_set_link_status_property - Set link status property of a connector | |||||
* @connector: drm connector | |||||
* @link_status: new value of link status property (0: Good, 1: Bad) | |||||
* | |||||
* In usual working scenario, this link status property will always be set to | |||||
* "GOOD". If something fails during or after a mode set, the kernel driver | |||||
* may set this link status property to "BAD". The caller then needs to send a | |||||
* hotplug uevent for userspace to re-check the valid modes through | |||||
* GET_CONNECTOR_IOCTL and retry modeset. | |||||
* | |||||
* Note: Drivers cannot rely on userspace to support this property and | |||||
* issue a modeset. As such, they may choose to handle issues (like | |||||
* re-training a link) without userspace's intervention. | |||||
* | |||||
* The reason for adding this property is to handle link training failures, but | |||||
* it is not limited to DP or link training. For example, if we implement | |||||
* asynchronous setcrtc, this property can be used to report any failures in that. | |||||
*/ | |||||
void drm_connector_set_link_status_property(struct drm_connector *connector, | |||||
uint64_t link_status) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |||||
connector->state->link_status = link_status; | |||||
drm_modeset_unlock(&dev->mode_config.connection_mutex); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_set_link_status_property); | |||||
/** | |||||
* drm_connector_attach_max_bpc_property - attach "max bpc" property | |||||
* @connector: connector to attach max bpc property on. | |||||
* @min: The minimum bit depth supported by the connector. | |||||
* @max: The maximum bit depth supported by the connector. | |||||
* | |||||
* This is used to add support for limiting the bit depth on a connector. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_connector_attach_max_bpc_property(struct drm_connector *connector, | |||||
int min, int max) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
struct drm_property *prop; | |||||
prop = connector->max_bpc_property; | |||||
if (!prop) { | |||||
prop = drm_property_create_range(dev, 0, "max bpc", min, max); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
connector->max_bpc_property = prop; | |||||
} | |||||
drm_object_attach_property(&connector->base, prop, max); | |||||
connector->state->max_requested_bpc = max; | |||||
connector->state->max_bpc = max; | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_attach_max_bpc_property); | |||||
/** | |||||
* drm_connector_set_vrr_capable_property - sets the variable refresh rate | |||||
* capable property for a connector | |||||
* @connector: drm connector | |||||
* @capable: True if the connector is variable refresh rate capable | |||||
* | |||||
* Should be used by atomic drivers to update the indicated support for | |||||
* variable refresh rate over a connector. | |||||
*/ | |||||
void drm_connector_set_vrr_capable_property( | |||||
struct drm_connector *connector, bool capable) | |||||
{ | |||||
drm_object_property_set_value(&connector->base, | |||||
connector->vrr_capable_property, | |||||
capable); | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_set_vrr_capable_property); | |||||
/** | |||||
* drm_connector_init_panel_orientation_property - | |||||
* initialize the connecters panel_orientation property | |||||
* @connector: connector for which to init the panel-orientation property. | |||||
* @width: width in pixels of the panel, used for panel quirk detection | |||||
* @height: height in pixels of the panel, used for panel quirk detection | |||||
* | |||||
* This function should only be called for built-in panels, after setting | |||||
* connector->display_info.panel_orientation first (if known). | |||||
* | |||||
* This function will check for platform specific (e.g. DMI based) quirks | |||||
* overriding display_info.panel_orientation first, then if panel_orientation | |||||
* is not DRM_MODE_PANEL_ORIENTATION_UNKNOWN it will attach the | |||||
* "panel orientation" property to the connector. | |||||
* | |||||
* Returns: | |||||
* Zero on success, negative errno on failure. | |||||
*/ | |||||
int drm_connector_init_panel_orientation_property( | |||||
struct drm_connector *connector, int width, int height) | |||||
{ | |||||
struct drm_device *dev = connector->dev; | |||||
struct drm_display_info *info = &connector->display_info; | |||||
struct drm_property *prop; | |||||
int orientation_quirk; | |||||
orientation_quirk = drm_get_panel_orientation_quirk(width, height); | |||||
if (orientation_quirk != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |||||
info->panel_orientation = orientation_quirk; | |||||
if (info->panel_orientation == DRM_MODE_PANEL_ORIENTATION_UNKNOWN) | |||||
return 0; | |||||
prop = dev->mode_config.panel_orientation_property; | |||||
if (!prop) { | |||||
prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | |||||
"panel orientation", | |||||
drm_panel_orientation_enum_list, | |||||
ARRAY_SIZE(drm_panel_orientation_enum_list)); | |||||
if (!prop) | |||||
return -ENOMEM; | |||||
dev->mode_config.panel_orientation_property = prop; | |||||
} | |||||
drm_object_attach_property(&connector->base, prop, | |||||
info->panel_orientation); | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_connector_init_panel_orientation_property); | |||||
int drm_connector_set_obj_prop(struct drm_mode_object *obj, | |||||
struct drm_property *property, | |||||
uint64_t value) | |||||
{ | |||||
int ret = -EINVAL; | |||||
struct drm_connector *connector = obj_to_connector(obj); | |||||
/* Do DPMS ourselves */ | |||||
if (property == connector->dev->mode_config.dpms_property) { | |||||
ret = (*connector->funcs->dpms)(connector, (int)value); | |||||
} else if (connector->funcs->set_property) | |||||
ret = connector->funcs->set_property(connector, property, value); | |||||
if (!ret) | |||||
drm_object_property_set_value(&connector->base, property, value); | |||||
return ret; | |||||
} | |||||
int drm_connector_property_set_ioctl(struct drm_device *dev, | |||||
void *data, struct drm_file *file_priv) | |||||
{ | |||||
struct drm_mode_connector_set_property *conn_set_prop = data; | |||||
struct drm_mode_obj_set_property obj_set_prop = { | |||||
.value = conn_set_prop->value, | |||||
.prop_id = conn_set_prop->prop_id, | |||||
.obj_id = conn_set_prop->connector_id, | |||||
.obj_type = DRM_MODE_OBJECT_CONNECTOR | |||||
}; | |||||
/* It does all the locking and checking we need */ | |||||
return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); | |||||
} | |||||
static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) | |||||
{ | |||||
/* For atomic drivers only state objects are synchronously updated and | |||||
* protected by modeset locks, so check those first. */ | |||||
if (connector->state) | |||||
return connector->state->best_encoder; | |||||
return connector->encoder; | |||||
} | |||||
static bool | |||||
drm_mode_expose_to_userspace(const struct drm_display_mode *mode, | |||||
const struct list_head *export_list, | |||||
const struct drm_file *file_priv) | |||||
{ | |||||
/* | |||||
* If user-space hasn't configured the driver to expose the stereo 3D | |||||
* modes, don't expose them. | |||||
*/ | |||||
if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) | |||||
return false; | |||||
/* | |||||
* If user-space hasn't configured the driver to expose the modes | |||||
* with aspect-ratio, don't expose them. However if such a mode | |||||
* is unique, let it be exposed, but reset the aspect-ratio flags | |||||
* while preparing the list of user-modes. | |||||
*/ | |||||
if (!file_priv->aspect_ratio_allowed) { | |||||
struct drm_display_mode *mode_itr; | |||||
list_for_each_entry(mode_itr, export_list, export_head) | |||||
if (drm_mode_match(mode_itr, mode, | |||||
DRM_MODE_MATCH_TIMINGS | | |||||
DRM_MODE_MATCH_CLOCK | | |||||
DRM_MODE_MATCH_FLAGS | | |||||
DRM_MODE_MATCH_3D_FLAGS)) | |||||
return false; | |||||
} | |||||
return true; | |||||
} | |||||
int drm_mode_getconnector(struct drm_device *dev, void *data, | |||||
struct drm_file *file_priv) | |||||
{ | |||||
struct drm_mode_get_connector *out_resp = data; | |||||
struct drm_connector *connector; | |||||
struct drm_encoder *encoder; | |||||
struct drm_display_mode *mode; | |||||
int mode_count = 0; | |||||
int encoders_count = 0; | |||||
int ret = 0; | |||||
int copied = 0; | |||||
int i; | |||||
struct drm_mode_modeinfo u_mode; | |||||
struct drm_mode_modeinfo __user *mode_ptr; | |||||
uint32_t __user *encoder_ptr; | |||||
LIST_HEAD(export_list); | |||||
if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |||||
return -EOPNOTSUPP; | |||||
memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); | |||||
connector = drm_connector_lookup(dev, file_priv, out_resp->connector_id); | |||||
if (!connector) | |||||
return -ENOENT; | |||||
drm_connector_for_each_possible_encoder(connector, encoder, i) | |||||
encoders_count++; | |||||
if ((out_resp->count_encoders >= encoders_count) && encoders_count) { | |||||
copied = 0; | |||||
encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); | |||||
drm_connector_for_each_possible_encoder(connector, encoder, i) { | |||||
if (put_user(encoder->base.id, encoder_ptr + copied)) { | |||||
ret = -EFAULT; | |||||
goto out; | |||||
} | |||||
copied++; | |||||
} | |||||
} | |||||
out_resp->count_encoders = encoders_count; | |||||
out_resp->connector_id = connector->base.id; | |||||
out_resp->connector_type = connector->connector_type; | |||||
out_resp->connector_type_id = connector->connector_type_id; | |||||
mutex_lock(&dev->mode_config.mutex); | |||||
if (out_resp->count_modes == 0) { | |||||
connector->funcs->fill_modes(connector, | |||||
dev->mode_config.max_width, | |||||
dev->mode_config.max_height); | |||||
} | |||||
out_resp->mm_width = connector->display_info.width_mm; | |||||
out_resp->mm_height = connector->display_info.height_mm; | |||||
out_resp->subpixel = connector->display_info.subpixel_order; | |||||
out_resp->connection = connector->status; | |||||
/* delayed so we get modes regardless of pre-fill_modes state */ | |||||
list_for_each_entry(mode, &connector->modes, head) | |||||
if (drm_mode_expose_to_userspace(mode, &export_list, | |||||
file_priv)) { | |||||
list_add_tail(&mode->export_head, &export_list); | |||||
mode_count++; | |||||
} | |||||
/* | |||||
* This ioctl is called twice, once to determine how much space is | |||||
* needed, and the 2nd time to fill it. | |||||
* The modes that need to be exposed to the user are maintained in the | |||||
* 'export_list'. When the ioctl is called first time to determine the, | |||||
* space, the export_list gets filled, to find the no.of modes. In the | |||||
* 2nd time, the user modes are filled, one by one from the export_list. | |||||
*/ | |||||
if ((out_resp->count_modes >= mode_count) && mode_count) { | |||||
copied = 0; | |||||
mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; | |||||
list_for_each_entry(mode, &export_list, export_head) { | |||||
drm_mode_convert_to_umode(&u_mode, mode); | |||||
/* | |||||
* Reset aspect ratio flags of user-mode, if modes with | |||||
* aspect-ratio are not supported. | |||||
*/ | |||||
if (!file_priv->aspect_ratio_allowed) | |||||
u_mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; | |||||
if (copy_to_user(mode_ptr + copied, | |||||
&u_mode, sizeof(u_mode))) { | |||||
ret = -EFAULT; | |||||
mutex_unlock(&dev->mode_config.mutex); | |||||
goto out; | |||||
} | |||||
copied++; | |||||
} | |||||
} | |||||
out_resp->count_modes = mode_count; | |||||
mutex_unlock(&dev->mode_config.mutex); | |||||
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |||||
encoder = drm_connector_get_encoder(connector); | |||||
if (encoder) | |||||
out_resp->encoder_id = encoder->base.id; | |||||
else | |||||
out_resp->encoder_id = 0; | |||||
/* Only grab properties after probing, to make sure EDID and other | |||||
* properties reflect the latest status. */ | |||||
ret = drm_mode_object_get_properties(&connector->base, file_priv->atomic, | |||||
(uint32_t __user *)(unsigned long)(out_resp->props_ptr), | |||||
(uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), | |||||
&out_resp->count_props); | |||||
drm_modeset_unlock(&dev->mode_config.connection_mutex); | |||||
out: | |||||
drm_connector_put(connector); | |||||
return ret; | |||||
} | |||||
/** | |||||
* DOC: Tile group | |||||
* | |||||
* Tile groups are used to represent tiled monitors with a unique integer | |||||
* identifier. Tiled monitors using DisplayID v1.3 have a unique 8-byte handle, | |||||
* we store this in a tile group, so we have a common identifier for all tiles | |||||
* in a monitor group. The property is called "TILE". Drivers can manage tile | |||||
* groups using drm_mode_create_tile_group(), drm_mode_put_tile_group() and | |||||
* drm_mode_get_tile_group(). But this is only needed for internal panels where | |||||
* the tile group information is exposed through a non-standard way. | |||||
*/ | |||||
static void drm_tile_group_free(struct kref *kref) | |||||
{ | |||||
struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); | |||||
struct drm_device *dev = tg->dev; | |||||
mutex_lock(&dev->mode_config.idr_mutex); | |||||
idr_remove(&dev->mode_config.tile_idr, tg->id); | |||||
mutex_unlock(&dev->mode_config.idr_mutex); | |||||
kfree(tg); | |||||
} | |||||
/** | |||||
* drm_mode_put_tile_group - drop a reference to a tile group. | |||||
* @dev: DRM device | |||||
* @tg: tile group to drop reference to. | |||||
* | |||||
* drop reference to tile group and free if 0. | |||||
*/ | |||||
void drm_mode_put_tile_group(struct drm_device *dev, | |||||
struct drm_tile_group *tg) | |||||
{ | |||||
kref_put(&tg->refcount, drm_tile_group_free); | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_put_tile_group); | |||||
/** | |||||
* drm_mode_get_tile_group - get a reference to an existing tile group | |||||
* @dev: DRM device | |||||
* @topology: 8-bytes unique per monitor. | |||||
* | |||||
* Use the unique bytes to get a reference to an existing tile group. | |||||
* | |||||
* RETURNS: | |||||
* tile group or NULL if not found. | |||||
*/ | |||||
struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, | |||||
char topology[8]) | |||||
{ | |||||
struct drm_tile_group *tg; | |||||
int id; | |||||
mutex_lock(&dev->mode_config.idr_mutex); | |||||
idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { | |||||
if (!memcmp(tg->group_data, topology, 8)) { | |||||
if (!kref_get_unless_zero(&tg->refcount)) | |||||
tg = NULL; | |||||
mutex_unlock(&dev->mode_config.idr_mutex); | |||||
return tg; | |||||
} | |||||
} | |||||
mutex_unlock(&dev->mode_config.idr_mutex); | |||||
return NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_get_tile_group); | |||||
/** | |||||
* drm_mode_create_tile_group - create a tile group from a displayid description | |||||
* @dev: DRM device | |||||
* @topology: 8-bytes unique per monitor. | |||||
* | |||||
* Create a tile group for the unique monitor, and get a unique | |||||
* identifier for the tile group. | |||||
* | |||||
* RETURNS: | |||||
* new tile group or NULL. | |||||
*/ | |||||
struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, | |||||
char topology[8]) | |||||
{ | |||||
struct drm_tile_group *tg; | |||||
int ret; | |||||
tg = kzalloc(sizeof(*tg), GFP_KERNEL); | |||||
if (!tg) | |||||
return NULL; | |||||
kref_init(&tg->refcount); | |||||
memcpy(tg->group_data, topology, 8); | |||||
tg->dev = dev; | |||||
mutex_lock(&dev->mode_config.idr_mutex); | |||||
ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); | |||||
if (ret >= 0) { | |||||
tg->id = ret; | |||||
} else { | |||||
kfree(tg); | |||||
tg = NULL; | |||||
} | |||||
mutex_unlock(&dev->mode_config.idr_mutex); | |||||
return tg; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_create_tile_group); |