blob: 6b6b07ff720ba612d3f3a82f1063d0432f28da1f [file] [log] [blame]
/*
* Copyright (c) 2006-2008 Intel Corporation
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
* Copyright (c) 2008 Red Hat Inc.
*
* DRM core CRTC related functions
*
* 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.
*
* Authors:
* Keith Packard
* Eric Anholt <eric@anholt.net>
* Dave Airlie <airlied@linux.ie>
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_modeset_lock.h>
#include <drm/drm_atomic.h>
#include "drm_crtc_internal.h"
#include "drm_internal.h"
static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev,
struct drm_mode_fb_cmd2 *r,
struct drm_file *file_priv);
/* Avoid boilerplate. I'm tired of typing. */
#define DRM_ENUM_NAME_FN(fnname, list) \
const char *fnname(int val) \
{ \
int i; \
for (i = 0; i < ARRAY_SIZE(list); i++) { \
if (list[i].type == val) \
return list[i].name; \
} \
return "(unknown)"; \
}
/*
* Global properties
*/
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_plane_type_enum_list[] = {
{ DRM_PLANE_TYPE_OVERLAY, "Overlay" },
{ DRM_PLANE_TYPE_PRIMARY, "Primary" },
{ DRM_PLANE_TYPE_CURSOR, "Cursor" },
};
/*
* Optional 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" },
};
/*
* Non-global properties, but "required" for certain connectors.
*/
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 drm_dirty_info_enum_list[] = {
{ DRM_MODE_DIRTY_OFF, "Off" },
{ DRM_MODE_DIRTY_ON, "On" },
{ DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
};
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" },
};
static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
{ DRM_MODE_ENCODER_NONE, "None" },
{ DRM_MODE_ENCODER_DAC, "DAC" },
{ DRM_MODE_ENCODER_TMDS, "TMDS" },
{ DRM_MODE_ENCODER_LVDS, "LVDS" },
{ DRM_MODE_ENCODER_TVDAC, "TV" },
{ DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
{ DRM_MODE_ENCODER_DSI, "DSI" },
{ DRM_MODE_ENCODER_DPMST, "DP MST" },
};
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" },
};
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_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_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 char printable_char(int c)
{
return isascii(c) && isprint(c) ? c : '?';
}
/**
* drm_get_format_name - return a string for drm fourcc format
* @format: format to compute name of
*
* Note that the buffer used by this function is globally shared and owned by
* the function itself.
*
* FIXME: This isn't really multithreading safe.
*/
const char *drm_get_format_name(uint32_t format)
{
static char buf[32];
snprintf(buf, sizeof(buf),
"%c%c%c%c %s-endian (0x%08x)",
printable_char(format & 0xff),
printable_char((format >> 8) & 0xff),
printable_char((format >> 16) & 0xff),
printable_char((format >> 24) & 0x7f),
format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
format);
return buf;
}
EXPORT_SYMBOL(drm_get_format_name);
/*
* Internal function to assign a slot in the object idr and optionally
* register the object into the idr.
*/
static int drm_mode_object_get_reg(struct drm_device *dev,
struct drm_mode_object *obj,
uint32_t obj_type,
bool register_obj)
{
int ret;
mutex_lock(&dev->mode_config.idr_mutex);
ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
if (ret >= 0) {
/*
* Set up the object linking under the protection of the idr
* lock so that other users can't see inconsistent state.
*/
obj->id = ret;
obj->type = obj_type;
}
mutex_unlock(&dev->mode_config.idr_mutex);
return ret < 0 ? ret : 0;
}
/**
* drm_mode_object_get - allocate a new modeset identifier
* @dev: DRM device
* @obj: object pointer, used to generate unique ID
* @obj_type: object type
*
* Create a unique identifier based on @ptr in @dev's identifier space. Used
* for tracking modes, CRTCs and connectors. Note that despite the _get postfix
* modeset identifiers are _not_ reference counted. Hence don't use this for
* reference counted modeset objects like framebuffers.
*
* Returns:
* New unique (relative to other objects in @dev) integer identifier for the
* object.
*/
int drm_mode_object_get(struct drm_device *dev,
struct drm_mode_object *obj, uint32_t obj_type)
{
return drm_mode_object_get_reg(dev, obj, obj_type, true);
}
static void drm_mode_object_register(struct drm_device *dev,
struct drm_mode_object *obj)
{
mutex_lock(&dev->mode_config.idr_mutex);
idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
mutex_unlock(&dev->mode_config.idr_mutex);
}
/**
* drm_mode_object_put - free a modeset identifer
* @dev: DRM device
* @object: object to free
*
* Free @id from @dev's unique identifier pool. Note that despite the _get
* postfix modeset identifiers are _not_ reference counted. Hence don't use this
* for reference counted modeset objects like framebuffers.
*/
void drm_mode_object_put(struct drm_device *dev,
struct drm_mode_object *object)
{
mutex_lock(&dev->mode_config.idr_mutex);
idr_remove(&dev->mode_config.crtc_idr, object->id);
mutex_unlock(&dev->mode_config.idr_mutex);
}
static struct drm_mode_object *_object_find(struct drm_device *dev,
uint32_t id, uint32_t type)
{
struct drm_mode_object *obj = NULL;
mutex_lock(&dev->mode_config.idr_mutex);
obj = idr_find(&dev->mode_config.crtc_idr, id);
if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
obj = NULL;
if (obj && obj->id != id)
obj = NULL;
/* don't leak out unref'd fb's */
if (obj && (obj->type == DRM_MODE_OBJECT_FB))
obj = NULL;
mutex_unlock(&dev->mode_config.idr_mutex);
return obj;
}
/**
* drm_mode_object_find - look up a drm object with static lifetime
* @dev: drm device
* @id: id of the mode object
* @type: type of the mode object
*
* Note that framebuffers cannot be looked up with this functions - since those
* are reference counted, they need special treatment. Even with
* DRM_MODE_OBJECT_ANY (although that will simply return NULL
* rather than WARN_ON()).
*/
struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
uint32_t id, uint32_t type)
{
struct drm_mode_object *obj = NULL;
/* Framebuffers are reference counted and need their own lookup
* function.*/
WARN_ON(type == DRM_MODE_OBJECT_FB);
obj = _object_find(dev, id, type);
return obj;
}
EXPORT_SYMBOL(drm_mode_object_find);
/**
* drm_framebuffer_init - initialize a framebuffer
* @dev: DRM device
* @fb: framebuffer to be initialized
* @funcs: ... with these functions
*
* Allocates an ID for the framebuffer's parent mode object, sets its mode
* functions & device file and adds it to the master fd list.
*
* IMPORTANT:
* This functions publishes the fb and makes it available for concurrent access
* by other users. Which means by this point the fb _must_ be fully set up -
* since all the fb attributes are invariant over its lifetime, no further
* locking but only correct reference counting is required.
*
* Returns:
* Zero on success, error code on failure.
*/
int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
const struct drm_framebuffer_funcs *funcs)
{
int ret;
mutex_lock(&dev->mode_config.fb_lock);
kref_init(&fb->refcount);
INIT_LIST_HEAD(&fb->filp_head);
fb->dev = dev;
fb->funcs = funcs;
ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
if (ret)
goto out;
dev->mode_config.num_fb++;
list_add(&fb->head, &dev->mode_config.fb_list);
out:
mutex_unlock(&dev->mode_config.fb_lock);
return 0;
}
EXPORT_SYMBOL(drm_framebuffer_init);
/* dev->mode_config.fb_lock must be held! */
static void __drm_framebuffer_unregister(struct drm_device *dev,
struct drm_framebuffer *fb)
{
mutex_lock(&dev->mode_config.idr_mutex);
idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
mutex_unlock(&dev->mode_config.idr_mutex);
fb->base.id = 0;
}
static void drm_framebuffer_free(struct kref *kref)
{
struct drm_framebuffer *fb =
container_of(kref, struct drm_framebuffer, refcount);
struct drm_device *dev = fb->dev;
/*
* The lookup idr holds a weak reference, which has not necessarily been
* removed at this point. Check for that.
*/
mutex_lock(&dev->mode_config.fb_lock);
if (fb->base.id) {
/* Mark fb as reaped and drop idr ref. */
__drm_framebuffer_unregister(dev, fb);
}
mutex_unlock(&dev->mode_config.fb_lock);
fb->funcs->destroy(fb);
}
static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
uint32_t id)
{
struct drm_mode_object *obj = NULL;
struct drm_framebuffer *fb;
mutex_lock(&dev->mode_config.idr_mutex);
obj = idr_find(&dev->mode_config.crtc_idr, id);
if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
fb = NULL;
else
fb = obj_to_fb(obj);
mutex_unlock(&dev->mode_config.idr_mutex);
return fb;
}
/**
* drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
* @dev: drm device
* @id: id of the fb object
*
* If successful, this grabs an additional reference to the framebuffer -
* callers need to make sure to eventually unreference the returned framebuffer
* again, using @drm_framebuffer_unreference.
*/
struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
uint32_t id)
{
struct drm_framebuffer *fb;
mutex_lock(&dev->mode_config.fb_lock);
fb = __drm_framebuffer_lookup(dev, id);
if (fb) {
if (!kref_get_unless_zero(&fb->refcount))
fb = NULL;
}
mutex_unlock(&dev->mode_config.fb_lock);
return fb;
}
EXPORT_SYMBOL(drm_framebuffer_lookup);
/**
* drm_framebuffer_unreference - unref a framebuffer
* @fb: framebuffer to unref
*
* This functions decrements the fb's refcount and frees it if it drops to zero.
*/
void drm_framebuffer_unreference(struct drm_framebuffer *fb)
{
DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
kref_put(&fb->refcount, drm_framebuffer_free);
}
EXPORT_SYMBOL(drm_framebuffer_unreference);
/**
* drm_framebuffer_reference - incr the fb refcnt
* @fb: framebuffer
*
* This functions increments the fb's refcount.
*/
void drm_framebuffer_reference(struct drm_framebuffer *fb)
{
DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
kref_get(&fb->refcount);
}
EXPORT_SYMBOL(drm_framebuffer_reference);
static void drm_framebuffer_free_bug(struct kref *kref)
{
BUG();
}
static void __drm_framebuffer_unreference(struct drm_framebuffer *fb)
{
DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
kref_put(&fb->refcount, drm_framebuffer_free_bug);
}
/**
* drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
* @fb: fb to unregister
*
* Drivers need to call this when cleaning up driver-private framebuffers, e.g.
* those used for fbdev. Note that the caller must hold a reference of it's own,
* i.e. the object may not be destroyed through this call (since it'll lead to a
* locking inversion).
*/
void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
{
struct drm_device *dev = fb->dev;
mutex_lock(&dev->mode_config.fb_lock);
/* Mark fb as reaped and drop idr ref. */
__drm_framebuffer_unregister(dev, fb);
mutex_unlock(&dev->mode_config.fb_lock);
}
EXPORT_SYMBOL(drm_framebuffer_unregister_private);
/**
* drm_framebuffer_cleanup - remove a framebuffer object
* @fb: framebuffer to remove
*
* Cleanup framebuffer. This function is intended to be used from the drivers
* ->destroy callback. It can also be used to clean up driver private
* framebuffers embedded into a larger structure.
*
* Note that this function does not remove the fb from active usuage - if it is
* still used anywhere, hilarity can ensue since userspace could call getfb on
* the id and get back -EINVAL. Obviously no concern at driver unload time.
*
* Also, the framebuffer will not be removed from the lookup idr - for
* user-created framebuffers this will happen in in the rmfb ioctl. For
* driver-private objects (e.g. for fbdev) drivers need to explicitly call
* drm_framebuffer_unregister_private.
*/
void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
{
struct drm_device *dev = fb->dev;
mutex_lock(&dev->mode_config.fb_lock);
list_del(&fb->head);
dev->mode_config.num_fb--;
mutex_unlock(&dev->mode_config.fb_lock);
}
EXPORT_SYMBOL(drm_framebuffer_cleanup);
/**
* drm_framebuffer_remove - remove and unreference a framebuffer object
* @fb: framebuffer to remove
*
* Scans all the CRTCs and planes in @dev's mode_config. If they're
* using @fb, removes it, setting it to NULL. Then drops the reference to the
* passed-in framebuffer. Might take the modeset locks.
*
* Note that this function optimizes the cleanup away if the caller holds the
* last reference to the framebuffer. It is also guaranteed to not take the
* modeset locks in this case.
*/
void drm_framebuffer_remove(struct drm_framebuffer *fb)
{
struct drm_device *dev = fb->dev;
struct drm_crtc *crtc;
struct drm_plane *plane;
struct drm_mode_set set;
int ret;
WARN_ON(!list_empty(&fb->filp_head));
/*
* drm ABI mandates that we remove any deleted framebuffers from active
* useage. But since most sane clients only remove framebuffers they no
* longer need, try to optimize this away.
*
* Since we're holding a reference ourselves, observing a refcount of 1
* means that we're the last holder and can skip it. Also, the refcount
* can never increase from 1 again, so we don't need any barriers or
* locks.
*
* Note that userspace could try to race with use and instate a new
* usage _after_ we've cleared all current ones. End result will be an
* in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
* in this manner.
*/
if (atomic_read(&fb->refcount.refcount) > 1) {
drm_modeset_lock_all(dev);
/* remove from any CRTC */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (crtc->primary->fb == fb) {
/* should turn off the crtc */
memset(&set, 0, sizeof(struct drm_mode_set));
set.crtc = crtc;
set.fb = NULL;
ret = drm_mode_set_config_internal(&set);
if (ret)
DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
}
}
list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
if (plane->fb == fb)
drm_plane_force_disable(plane);
}
drm_modeset_unlock_all(dev);
}
drm_framebuffer_unreference(fb);
}
EXPORT_SYMBOL(drm_framebuffer_remove);
DEFINE_WW_CLASS(crtc_ww_class);
/**
* drm_crtc_init_with_planes - Initialise a new CRTC object with
* specified primary and cursor planes.
* @dev: DRM device
* @crtc: CRTC object to init
* @primary: Primary plane for CRTC
* @cursor: Cursor plane for CRTC
* @funcs: callbacks for the new CRTC
*
* Inits a new object created as base part of a driver crtc object.
*
* Returns:
* Zero on success, error code on failure.
*/
int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
struct drm_plane *primary,
struct drm_plane *cursor,
const struct drm_crtc_funcs *funcs)
{
struct drm_mode_config *config = &dev->mode_config;
int ret;
crtc->dev = dev;
crtc->funcs = funcs;
crtc->invert_dimensions = false;
drm_modeset_lock_init(&crtc->mutex);
ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
if (ret)
return ret;
crtc->base.properties = &crtc->properties;
list_add_tail(&crtc->head, &config->crtc_list);
config->num_crtc++;
crtc->primary = primary;
crtc->cursor = cursor;
if (primary)
primary->possible_crtcs = 1 << drm_crtc_index(crtc);
if (cursor)
cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
drm_object_attach_property(&crtc->base, config->prop_active, 0);
}
return 0;
}
EXPORT_SYMBOL(drm_crtc_init_with_planes);
/**
* drm_crtc_cleanup - Clean up the core crtc usage
* @crtc: CRTC to cleanup
*
* This function cleans up @crtc and removes it from the DRM mode setting
* core. Note that the function does *not* free the crtc structure itself,
* this is the responsibility of the caller.
*/
void drm_crtc_cleanup(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
kfree(crtc->gamma_store);
crtc->gamma_store = NULL;
drm_modeset_lock_fini(&crtc->mutex);
drm_mode_object_put(dev, &crtc->base);
list_del(&crtc->head);
dev->mode_config.num_crtc--;
WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
if (crtc->state && crtc->funcs->atomic_destroy_state)
crtc->funcs->atomic_destroy_state(crtc, crtc->state);
memset(crtc, 0, sizeof(*crtc));
}
EXPORT_SYMBOL(drm_crtc_cleanup);
/**
* drm_crtc_index - find the index of a registered CRTC
* @crtc: CRTC to find index for
*
* Given a registered CRTC, return the index of that CRTC within a DRM
* device's list of CRTCs.
*/
unsigned int drm_crtc_index(struct drm_crtc *crtc)
{
unsigned int index = 0;
struct drm_crtc *tmp;
list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
if (tmp == crtc)
return index;
index++;
}
BUG();
}
EXPORT_SYMBOL(drm_crtc_index);
/*
* drm_mode_remove - remove and free a mode
* @connector: connector list to modify
* @mode: mode to remove
*
* Remove @mode from @connector's mode list, then free it.
*/
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_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);
/**
* drm_connector_get_cmdline_mode - reads the user's cmdline mode
* @connector: connector to quwery
*
* The kernel supports per-connector configration 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) {
const char *s;
switch (mode->force) {
case DRM_FORCE_OFF:
s = "OFF";
break;
case DRM_FORCE_ON_DIGITAL:
s = "ON - dig";
break;
default:
case DRM_FORCE_ON:
s = "ON";
break;
}
DRM_INFO("forcing %s connector %s\n", connector->name, s);
connector->force = mode->force;
}
DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
connector->name,
mode->xres, mode->yres,
mode->refresh_specified ? mode->refresh : 60,
mode->rb ? " reduced blanking" : "",
mode->margins ? " with margins" : "",
mode->interlace ? " interlaced" : "");
}
/**
* 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;
drm_modeset_lock_all(dev);
ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
if (ret)
goto out_unlock;
connector->base.properties = &connector->properties;
connector->dev = dev;
connector->funcs = funcs;
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;
}
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;
}
INIT_LIST_HEAD(&connector->probed_modes);
INIT_LIST_HEAD(&connector->modes);
connector->edid_blob_ptr = NULL;
connector->status = connector_status_unknown;
drm_connector_get_cmdline_mode(connector);
/* We should add connectors at the end to avoid upsetting the connector
* index too much. */
list_add_tail(&connector->head, &config->connector_list);
config->num_connector++;
if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
drm_object_attach_property(&connector->base,
config->edid_property,
0);
drm_object_attach_property(&connector->base,
config->dpms_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:
if (ret)
drm_mode_object_put(dev, &connector->base);
out_unlock:
drm_modeset_unlock_all(dev);
return ret;
}
EXPORT_SYMBOL(drm_connector_init);
/**
* 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;
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_remove(&drm_connector_enum_list[connector->connector_type].ida,
connector->connector_type_id);
kfree(connector->display_info.bus_formats);
drm_mode_object_put(dev, &connector->base);
kfree(connector->name);
connector->name = NULL;
list_del(&connector->head);
dev->mode_config.num_connector--;
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);
memset(connector, 0, sizeof(*connector));
}
EXPORT_SYMBOL(drm_connector_cleanup);
/**
* drm_connector_index - find the index of a registered connector
* @connector: connector to find index for
*
* Given a registered connector, return the index of that connector within a DRM
* device's list of connectors.
*/
unsigned int drm_connector_index(struct drm_connector *connector)
{
unsigned int index = 0;
struct drm_connector *tmp;
struct drm_mode_config *config = &connector->dev->mode_config;
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) {
if (tmp == connector)
return index;
index++;
}
BUG();
}
EXPORT_SYMBOL(drm_connector_index);
/**
* 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;
drm_mode_object_register(connector->dev, &connector->base);
ret = drm_sysfs_connector_add(connector);
if (ret)
return ret;
ret = drm_debugfs_connector_add(connector);
if (ret) {
drm_sysfs_connector_remove(connector);
return ret;
}
return 0;
}
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)
{
drm_sysfs_connector_remove(connector);
drm_debugfs_connector_remove(connector);
}
EXPORT_SYMBOL(drm_connector_unregister);
/**
* drm_connector_unplug_all - unregister connector userspace interfaces
* @dev: drm device
*
* This function unregisters all connector userspace interfaces in sysfs. Should
* be call when the device is disconnected, e.g. from an usb driver's
* ->disconnect callback.
*/
void drm_connector_unplug_all(struct drm_device *dev)
{
struct drm_connector *connector;
/* taking the mode config mutex ends up in a clash with sysfs */
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
drm_connector_unregister(connector);
}
EXPORT_SYMBOL(drm_connector_unplug_all);
/**
* drm_encoder_init - Init a preallocated encoder
* @dev: drm device
* @encoder: the encoder to init
* @funcs: callbacks for this encoder
* @encoder_type: user visible type of the encoder
*
* Initialises a preallocated encoder. Encoder should be
* subclassed as part of driver encoder objects.
*
* Returns:
* Zero on success, error code on failure.
*/
int drm_encoder_init(struct drm_device *dev,
struct drm_encoder *encoder,
const struct drm_encoder_funcs *funcs,
int encoder_type)
{
int ret;
drm_modeset_lock_all(dev);
ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
if (ret)
goto out_unlock;
encoder->dev = dev;
encoder->encoder_type = encoder_type;
encoder->funcs = funcs;
encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
drm_encoder_enum_list[encoder_type].name,
encoder->base.id);
if (!encoder->name) {
ret = -ENOMEM;
goto out_put;
}
list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
dev->mode_config.num_encoder++;
out_put:
if (ret)
drm_mode_object_put(dev, &encoder->base);
out_unlock:
drm_modeset_unlock_all(dev);
return ret;
}
EXPORT_SYMBOL(drm_encoder_init);
/**
* drm_encoder_cleanup - cleans up an initialised encoder
* @encoder: encoder to cleanup
*
* Cleans up the encoder but doesn't free the object.
*/
void drm_encoder_cleanup(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
drm_modeset_lock_all(dev);
drm_mode_object_put(dev, &encoder->base);
kfree(encoder->name);
list_del(&encoder->head);
dev->mode_config.num_encoder--;
drm_modeset_unlock_all(dev);
memset(encoder, 0, sizeof(*encoder));
}
EXPORT_SYMBOL(drm_encoder_cleanup);
/**
* drm_universal_plane_init - Initialize a new universal plane object
* @dev: DRM device
* @plane: plane object to init
* @possible_crtcs: bitmask of possible CRTCs
* @funcs: callbacks for the new plane
* @formats: array of supported formats (%DRM_FORMAT_*)
* @format_count: number of elements in @formats
* @type: type of plane (overlay, primary, cursor)
*
* Initializes a plane object of type @type.
*
* Returns:
* Zero on success, error code on failure.
*/
int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
unsigned long possible_crtcs,
const struct drm_plane_funcs *funcs,
const uint32_t *formats, uint32_t format_count,
enum drm_plane_type type)
{
struct drm_mode_config *config = &dev->mode_config;
int ret;
ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
if (ret)
return ret;
drm_modeset_lock_init(&plane->mutex);
plane->base.properties = &plane->properties;
plane->dev = dev;
plane->funcs = funcs;
plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
GFP_KERNEL);
if (!plane->format_types) {
DRM_DEBUG_KMS("out of memory when allocating plane\n");
drm_mode_object_put(dev, &plane->base);
return -ENOMEM;
}
memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
plane->format_count = format_count;
plane->possible_crtcs = possible_crtcs;
plane->type = type;
list_add_tail(&plane->head, &config->plane_list);
config->num_total_plane++;
if (plane->type == DRM_PLANE_TYPE_OVERLAY)
config->num_overlay_plane++;
drm_object_attach_property(&plane->base,
config->plane_type_property,
plane->type);
if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
drm_object_attach_property(&plane->base, config->prop_src_x, 0);
drm_object_attach_property(&plane->base, config->prop_src_y, 0);
drm_object_attach_property(&plane->base, config->prop_src_w, 0);
drm_object_attach_property(&plane->base, config->prop_src_h, 0);
}
return 0;
}
EXPORT_SYMBOL(drm_universal_plane_init);
/**
* drm_plane_init - Initialize a legacy plane
* @dev: DRM device
* @plane: plane object to init
* @possible_crtcs: bitmask of possible CRTCs
* @funcs: callbacks for the new plane
* @formats: array of supported formats (%DRM_FORMAT_*)
* @format_count: number of elements in @formats
* @is_primary: plane type (primary vs overlay)
*
* Legacy API to initialize a DRM plane.
*
* New drivers should call drm_universal_plane_init() instead.
*
* Returns:
* Zero on success, error code on failure.
*/
int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
unsigned long possible_crtcs,
const struct drm_plane_funcs *funcs,
const uint32_t *formats, uint32_t format_count,
bool is_primary)
{
enum drm_plane_type type;
type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
formats, format_count, type);
}
EXPORT_SYMBOL(drm_plane_init);
/**
* drm_plane_cleanup - Clean up the core plane usage
* @plane: plane to cleanup
*
* This function cleans up @plane and removes it from the DRM mode setting
* core. Note that the function does *not* free the plane structure itself,
* this is the responsibility of the caller.
*/
void drm_plane_cleanup(struct drm_plane *plane)
{
struct drm_device *dev = plane->dev;
drm_modeset_lock_all(dev);
kfree(plane->format_types);
drm_mode_object_put(dev, &plane->base);
BUG_ON(list_empty(&plane->head));
list_del(&plane->head);
dev->mode_config.num_total_plane--;
if (plane->type == DRM_PLANE_TYPE_OVERLAY)
dev->mode_config.num_overlay_plane--;
drm_modeset_unlock_all(dev);
WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
if (plane->state && plane->funcs->atomic_destroy_state)
plane->funcs->atomic_destroy_state(plane, plane->state);
memset(plane, 0, sizeof(*plane));
}
EXPORT_SYMBOL(drm_plane_cleanup);
/**
* drm_plane_index - find the index of a registered plane
* @plane: plane to find index for
*
* Given a registered plane, return the index of that CRTC within a DRM
* device's list of planes.
*/
unsigned int drm_plane_index(struct drm_plane *plane)
{
unsigned int index = 0;
struct drm_plane *tmp;
list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) {
if (tmp == plane)
return index;
index++;
}
BUG();
}
EXPORT_SYMBOL(drm_plane_index);
/**
* drm_plane_force_disable - Forcibly disable a plane
* @plane: plane to disable
*
* Forces the plane to be disabled.
*
* Used when the plane's current framebuffer is destroyed,
* and when restoring fbdev mode.
*/
void drm_plane_force_disable(struct drm_plane *plane)
{
int ret;
if (!plane->fb)
return;
plane->old_fb = plane->fb;
ret = plane->funcs->disable_plane(plane);
if (ret) {
DRM_ERROR("failed to disable plane with busy fb\n");
plane->old_fb = NULL;
return;
}
/* disconnect the plane from the fb and crtc: */
__drm_framebuffer_unreference(plane->old_fb);
plane->old_fb = NULL;
plane->fb = NULL;
plane->crtc = NULL;
}
EXPORT_SYMBOL(drm_plane_force_disable);
static int drm_mode_create_standard_properties(struct drm_device *dev)
{
struct drm_property *prop;
/*
* Standard properties (apply to all connectors)
*/
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, DRM_MODE_PROP_IMMUTABLE,
"type", drm_plane_type_enum_list,
ARRAY_SIZE(drm_plane_type_enum_list));
if (!prop)
return -ENOMEM;
dev->mode_config.plane_type_property = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"SRC_X", 0, UINT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_src_x = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"SRC_Y", 0, UINT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_src_y = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"SRC_W", 0, UINT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_src_w = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"SRC_H", 0, UINT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_src_h = prop;
prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
"CRTC_X", INT_MIN, INT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_crtc_x = prop;
prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
"CRTC_Y", INT_MIN, INT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_crtc_y = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"CRTC_W", 0, INT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_crtc_w = prop;
prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
"CRTC_H", 0, INT_MAX);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_crtc_h = prop;
prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
"FB_ID", DRM_MODE_OBJECT_FB);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_fb_id = prop;
prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
"CRTC_ID", DRM_MODE_OBJECT_CRTC);
if (!prop)
return -ENOMEM;
dev->mode_config.prop_crtc_id = prop;
prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
"ACTIVE");
if (!prop)
return -ENOMEM;
dev->mode_config.prop_active = 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);
/**
* drm_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,
char *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));
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));
dev->mode_config.tv_subconnector_property = tv_subconnector;
/*
* Other, TV specific properties: margins & TV modes.
*/
dev->mode_config.tv_left_margin_property =
drm_property_create_range(dev, 0, "left margin", 0, 100);
dev->mode_config.tv_right_margin_property =
drm_property_create_range(dev, 0, "right margin", 0, 100);
dev->mode_config.tv_top_margin_property =
drm_property_create_range(dev, 0, "top margin", 0, 100);
dev->mode_config.tv_bottom_margin_property =
drm_property_create_range(dev, 0, "bottom margin", 0, 100);
dev->mode_config.tv_mode_property =
drm_property_create(dev, DRM_MODE_PROP_ENUM,
"mode", num_modes);
for (i = 0; i < num_modes; i++)
drm_property_add_enum(dev->mode_config.tv_mode_property, i,
i, modes[i]);
dev->mode_config.tv_brightness_property =
drm_property_create_range(dev, 0, "brightness", 0, 100);
dev->mode_config.tv_contrast_property =
drm_property_create_range(dev, 0, "contrast", 0, 100);
dev->mode_config.tv_flicker_reduction_property =
drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
dev->mode_config.tv_overscan_property =
drm_property_create_range(dev, 0, "overscan", 0, 100);
dev->mode_config.tv_saturation_property =
drm_property_create_range(dev, 0, "saturation", 0, 100);
dev->mode_config.tv_hue_property =
drm_property_create_range(dev, 0, "hue", 0, 100);
return 0;
}
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.
*/
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);
/**
* 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);
/**
* drm_mode_create_dirty_property - create dirty property
* @dev: DRM device
*
* Called by a driver the first time it's needed, must be attached to desired
* connectors.
*/
int drm_mode_create_dirty_info_property(struct drm_device *dev)
{
struct drm_property *dirty_info;
if (dev->mode_config.dirty_info_property)
return 0;
dirty_info =
drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
"dirty",
drm_dirty_info_enum_list,
ARRAY_SIZE(drm_dirty_info_enum_list));
dev->mode_config.dirty_info_property = dirty_info;
return 0;
}
EXPORT_SYMBOL(drm_mode_create_dirty_info_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);
static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
{
uint32_t total_objects = 0;
total_objects += dev->mode_config.num_crtc;
total_objects += dev->mode_config.num_connector;
total_objects += dev->mode_config.num_encoder;
group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL);
if (!group->id_list)
return -ENOMEM;
group->num_crtcs = 0;
group->num_connectors = 0;
group->num_encoders = 0;
return 0;
}
void drm_mode_group_destroy(struct drm_mode_group *group)
{
kfree(group->id_list);
group->id_list = NULL;
}
/*
* NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is
* the drm core's responsibility to set up mode control groups.
*/
int drm_mode_group_init_legacy_group(struct drm_device *dev,
struct drm_mode_group *group)
{
struct drm_crtc *crtc;
struct drm_encoder *encoder;
struct drm_connector *connector;
int ret;
ret = drm_mode_group_init(dev, group);
if (ret)
return ret;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
group->id_list[group->num_crtcs++] = crtc->base.id;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
group->id_list[group->num_crtcs + group->num_encoders++] =
encoder->base.id;
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
group->id_list[group->num_crtcs + group->num_encoders +
group->num_connectors++] = connector->base.id;
return 0;
}
EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
void drm_reinit_primary_mode_group(struct drm_device *dev)
{
drm_modeset_lock_all(dev);
drm_mode_group_destroy(&dev->primary->mode_group);
drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group);
drm_modeset_unlock_all(dev);
}
EXPORT_SYMBOL(drm_reinit_primary_mode_group);
/**
* drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
* @out: drm_mode_modeinfo struct to return to the user
* @in: drm_display_mode to use
*
* Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
* the user.
*/
static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
const struct drm_display_mode *in)
{
WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
"timing values too large for mode info\n");
out->clock = in->clock;
out->hdisplay = in->hdisplay;
out->hsync_start = in->hsync_start;
out->hsync_end = in->hsync_end;
out->htotal = in->htotal;
out->hskew = in->hskew;
out->vdisplay = in->vdisplay;
out->vsync_start = in->vsync_start;
out->vsync_end = in->vsync_end;
out->vtotal = in->vtotal;
out->vscan = in->vscan;
out->vrefresh = in->vrefresh;
out->flags = in->flags;
out->type = in->type;
strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
}
/**
* drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
* @out: drm_display_mode to return to the user
* @in: drm_mode_modeinfo to use
*
* Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
* the caller.
*
* Returns:
* Zero on success, negative errno on failure.
*/
static int drm_crtc_convert_umode(struct drm_display_mode *out,
const struct drm_mode_modeinfo *in)
{
if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
return -ERANGE;
if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
return -EINVAL;
out->clock = in->clock;
out->hdisplay = in->hdisplay;
out->hsync_start = in->hsync_start;
out->hsync_end = in->hsync_end;
out->htotal = in->htotal;
out->hskew = in->hskew;
out->vdisplay = in->vdisplay;
out->vsync_start = in->vsync_start;
out->vsync_end = in->vsync_end;
out->vtotal = in->vtotal;
out->vscan = in->vscan;
out->vrefresh = in->vrefresh;
out->flags = in->flags;
out->type = in->type;
strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
return 0;
}
/**
* drm_mode_getresources - get graphics configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
* Construct a set of configuration description structures and return
* them to the user, including CRTC, connector and framebuffer configuration.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_getresources(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_card_res *card_res = data;
struct list_head *lh;
struct drm_framebuffer *fb;
struct drm_connector *connector;
struct drm_crtc *crtc;
struct drm_encoder *encoder;
int ret = 0;
int connector_count = 0;
int crtc_count = 0;
int fb_count = 0;
int encoder_count = 0;
int copied = 0, i;
uint32_t __user *fb_id;
uint32_t __user *crtc_id;
uint32_t __user *connector_id;
uint32_t __user *encoder_id;
struct drm_mode_group *mode_group;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
mutex_lock(&file_priv->fbs_lock);
/*
* For the non-control nodes we need to limit the list of resources
* by IDs in the group list for this node
*/
list_for_each(lh, &file_priv->fbs)
fb_count++;
/* handle this in 4 parts */
/* FBs */
if (card_res->count_fbs >= fb_count) {
copied = 0;
fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
list_for_each_entry(fb, &file_priv->fbs, filp_head) {
if (put_user(fb->base.id, fb_id + copied)) {
mutex_unlock(&file_priv->fbs_lock);
return -EFAULT;
}
copied++;
}
}
card_res->count_fbs = fb_count;
mutex_unlock(&file_priv->fbs_lock);
/* mode_config.mutex protects the connector list against e.g. DP MST
* connector hot-adding. CRTC/Plane lists are invariant. */
mutex_lock(&dev->mode_config.mutex);
if (!drm_is_primary_client(file_priv)) {
mode_group = NULL;
list_for_each(lh, &dev->mode_config.crtc_list)
crtc_count++;
list_for_each(lh, &dev->mode_config.connector_list)
connector_count++;
list_for_each(lh, &dev->mode_config.encoder_list)
encoder_count++;
} else {
mode_group = &file_priv->master->minor->mode_group;
crtc_count = mode_group->num_crtcs;
connector_count = mode_group->num_connectors;
encoder_count = mode_group->num_encoders;
}
card_res->max_height = dev->mode_config.max_height;
card_res->min_height = dev->mode_config.min_height;
card_res->max_width = dev->mode_config.max_width;
card_res->min_width = dev->mode_config.min_width;
/* CRTCs */
if (card_res->count_crtcs >= crtc_count) {
copied = 0;
crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
if (!mode_group) {
list_for_each_entry(crtc, &dev->mode_config.crtc_list,
head) {
DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
if (put_user(crtc->base.id, crtc_id + copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
} else {
for (i = 0; i < mode_group->num_crtcs; i++) {
if (put_user(mode_group->id_list[i],
crtc_id + copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
}
}
card_res->count_crtcs = crtc_count;
/* Encoders */
if (card_res->count_encoders >= encoder_count) {
copied = 0;
encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
if (!mode_group) {
list_for_each_entry(encoder,
&dev->mode_config.encoder_list,
head) {
DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
encoder->name);
if (put_user(encoder->base.id, encoder_id +
copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
} else {
for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
if (put_user(mode_group->id_list[i],
encoder_id + copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
}
}
card_res->count_encoders = encoder_count;
/* Connectors */
if (card_res->count_connectors >= connector_count) {
copied = 0;
connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
if (!mode_group) {
list_for_each_entry(connector,
&dev->mode_config.connector_list,
head) {
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
connector->base.id,
connector->name);
if (put_user(connector->base.id,
connector_id + copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
} else {
int start = mode_group->num_crtcs +
mode_group->num_encoders;
for (i = start; i < start + mode_group->num_connectors; i++) {
if (put_user(mode_group->id_list[i],
connector_id + copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
}
}
card_res->count_connectors = connector_count;
DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
card_res->count_connectors, card_res->count_encoders);
out:
mutex_unlock(&dev->mode_config.mutex);
return ret;
}
/**
* drm_mode_getcrtc - get CRTC configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
* Construct a CRTC configuration structure to return to the user.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_getcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv)
{
struct drm_mode_crtc *crtc_resp = data;
struct drm_crtc *crtc;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
if (!crtc)
return -ENOENT;
drm_modeset_lock_crtc(crtc, crtc->primary);
crtc_resp->x = crtc->x;
crtc_resp->y = crtc->y;
crtc_resp->gamma_size = crtc->gamma_size;
if (crtc->primary->fb)
crtc_resp->fb_id = crtc->primary->fb->base.id;
else
crtc_resp->fb_id = 0;
if (crtc->enabled) {
drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
crtc_resp->mode_valid = 1;
} else {
crtc_resp->mode_valid = 0;
}
drm_modeset_unlock_crtc(crtc);
return 0;
}
static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
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;
return true;
}
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;
}
/* helper for getconnector and getproperties ioctls */
static int get_properties(struct drm_mode_object *obj, bool atomic,
uint32_t __user *prop_ptr, uint64_t __user *prop_values,
uint32_t *arg_count_props)
{
int props_count;
int i, ret, copied;
props_count = obj->properties->count;
if (!atomic)
props_count -= obj->properties->atomic_count;
if ((*arg_count_props >= props_count) && props_count) {
for (i = 0, copied = 0; copied < props_count; i++) {
struct drm_property *prop = obj->properties->properties[i];
uint64_t val;
if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
continue;
ret = drm_object_property_get_value(obj, prop, &val);
if (ret)
return ret;
if (put_user(prop->base.id, prop_ptr + copied))
return -EFAULT;
if (put_user(val, prop_values + copied))
return -EFAULT;
copied++;
}
}
*arg_count_props = props_count;
return 0;
}
/**
* drm_mode_getconnector - get connector configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
* Construct a connector configuration structure to return to the user.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
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;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
mutex_lock(&dev->mode_config.mutex);
connector = drm_connector_find(dev, out_resp->connector_id);
if (!connector) {
ret = -ENOENT;
goto out;
}
for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
if (connector->encoder_ids[i] != 0)
encoders_count++;
if (out_resp->count_modes == 0) {
connector->funcs->fill_modes(connector,
dev->mode_config.max_width,
dev->mode_config.max_height);
}
/* 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, file_priv))
mode_count++;
out_resp->connector_id = connector->base.id;
out_resp->connector_type = connector->connector_type;
out_resp->connector_type_id = connector->connector_type_id;
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;
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;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
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, &connector->modes, head) {
if (!drm_mode_expose_to_userspace(mode, file_priv))
continue;
drm_crtc_convert_to_umode(&u_mode, mode);
if (copy_to_user(mode_ptr + copied,
&u_mode, sizeof(u_mode))) {
ret = -EFAULT;
goto out;
}
copied++;
}
}
out_resp->count_modes = mode_count;
ret = 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);
if (ret)
goto out;
if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
copied = 0;
encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
if (connector->encoder_ids[i] != 0) {
if (put_user(connector->encoder_ids[i],
encoder_ptr + copied)) {
ret = -EFAULT;
goto out;
}
copied++;
}
}
}
out_resp->count_encoders = encoders_count;
out:
drm_modeset_unlock(&dev->mode_config.connection_mutex);
mutex_unlock(&dev->mode_config.mutex);
return ret;
}
static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
{
struct drm_connector *connector;
struct drm_device *dev = encoder->dev;
bool uses_atomic = false;
/* For atomic drivers only state objects are synchronously updated and
* protected by modeset locks, so check those first. */
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (!connector->state)
continue;
uses_atomic = true;
if (connector->state->best_encoder != encoder)
continue;
return connector->state->crtc;
}
/* Don't return stale data (e.g. pending async disable). */
if (uses_atomic)
return NULL;
return encoder->crtc;
}
/**
* drm_mode_getencoder - get encoder configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
* Construct a encoder configuration structure to return to the user.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_getencoder(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_get_encoder *enc_resp = data;
struct drm_encoder *encoder;
struct drm_crtc *crtc;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
encoder = drm_encoder_find(dev, enc_resp->encoder_id);
if (!encoder)
return -ENOENT;
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
crtc = drm_encoder_get_crtc(encoder);
if (crtc)
enc_resp->crtc_id = crtc->base.id;
else if (encoder->crtc)
enc_resp->crtc_id = encoder->crtc->base.id;
else
enc_resp->crtc_id = 0;
drm_modeset_unlock(&dev->mode_config.connection_mutex);
enc_resp->encoder_type = encoder->encoder_type;
enc_resp->encoder_id = encoder->base.id;
enc_resp->possible_crtcs = encoder->possible_crtcs;
enc_resp->possible_clones = encoder->possible_clones;
return 0;
}
/**
* drm_mode_getplane_res - enumerate all plane resources
* @dev: DRM device
* @data: ioctl data
* @file_priv: DRM file info
*
* Construct a list of plane ids to return to the user.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_getplane_res(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_get_plane_res *plane_resp = data;
struct drm_mode_config *config;
struct drm_plane *plane;
uint32_t __user *plane_ptr;
int copied = 0;
unsigned num_planes;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
config = &dev->mode_config;
if (file_priv->universal_planes)
num_planes = config->num_total_plane;
else
num_planes = config->num_overlay_plane;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
if (num_planes &&
(plane_resp->count_planes >= num_planes)) {
plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
/* Plane lists are invariant, no locking needed. */
list_for_each_entry(plane, &config->plane_list, head) {
/*
* Unless userspace set the 'universal planes'
* capability bit, only advertise overlays.
*/
if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
!file_priv->universal_planes)
continue;
if (put_user(plane->base.id, plane_ptr + copied))
return -EFAULT;
copied++;
}
}
plane_resp->count_planes = num_planes;
return 0;
}
/**
* drm_mode_getplane - get plane configuration
* @dev: DRM device
* @data: ioctl data
* @file_priv: DRM file info
*
* Construct a plane configuration structure to return to the user.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_getplane(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_get_plane *plane_resp = data;
struct drm_plane *plane;
uint32_t __user *format_ptr;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
plane = drm_plane_find(dev, plane_resp->plane_id);
if (!plane)
return -ENOENT;
drm_modeset_lock(&plane->mutex, NULL);
if (plane->crtc)
plane_resp->crtc_id = plane->crtc->base.id;
else
plane_resp->crtc_id = 0;
if (plane->fb)
plane_resp->fb_id = plane->fb->base.id;
else
plane_resp->fb_id = 0;
drm_modeset_unlock(&plane->mutex);
plane_resp->plane_id = plane->base.id;
plane_resp->possible_crtcs = plane->possible_crtcs;
plane_resp->gamma_size = 0;
/*
* This ioctl is called twice, once to determine how much space is
* needed, and the 2nd time to fill it.
*/
if (plane->format_count &&
(plane_resp->count_format_types >= plane->format_count)) {
format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
if (copy_to_user(format_ptr,
plane->format_types,
sizeof(uint32_t) * plane->format_count)) {
return -EFAULT;
}
}
plane_resp->count_format_types = plane->format_count;
return 0;
}
/*
* setplane_internal - setplane handler for internal callers
*
* Note that we assume an extra reference has already been taken on fb. If the
* update fails, this reference will be dropped before return; if it succeeds,
* the previous framebuffer (if any) will be unreferenced instead.
*
* src_{x,y,w,h} are provided in 16.16 fixed point format
*/
static int __setplane_internal(struct drm_plane *plane,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
int32_t crtc_x, int32_t crtc_y,
uint32_t crtc_w, uint32_t crtc_h,
/* src_{x,y,w,h} values are 16.16 fixed point */
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
int ret = 0;
unsigned int fb_width, fb_height;
unsigned int i;
/* No fb means shut it down */
if (!fb) {
plane->old_fb = plane->fb;
ret = plane->funcs->disable_plane(plane);
if (!ret) {
plane->crtc = NULL;
plane->fb = NULL;
} else {
plane->old_fb = NULL;
}
goto out;
}
/* Check whether this plane is usable on this CRTC */
if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
DRM_DEBUG_KMS("Invalid crtc for plane\n");
ret = -EINVAL;
goto out;
}
/* Check whether this plane supports the fb pixel format. */
for (i = 0; i < plane->format_count; i++)
if (fb->pixel_format == plane->format_types[i])
break;
if (i == plane->format_count) {
DRM_DEBUG_KMS("Invalid pixel format %s\n",
drm_get_format_name(fb->pixel_format));
ret = -EINVAL;
goto out;
}
fb_width = fb->width << 16;
fb_height = fb->height << 16;
/* Make sure source coordinates are inside the fb. */
if (src_w > fb_width ||
src_x > fb_width - src_w ||
src_h > fb_height ||
src_y > fb_height - src_h) {
DRM_DEBUG_KMS("Invalid source coordinates "
"%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
ret = -ENOSPC;
goto out;
}
plane->old_fb = plane->fb;
ret = plane->funcs->update_plane(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
src_x, src_y, src_w, src_h);
if (!ret) {
plane->crtc = crtc;
plane->fb = fb;
fb = NULL;
} else {
plane->old_fb = NULL;
}
out:
if (fb)
drm_framebuffer_unreference(fb);
if (plane->old_fb)
drm_framebuffer_unreference(plane->old_fb);
plane->old_fb = NULL;
return ret;
}
static int setplane_internal(struct drm_plane *plane,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
int32_t crtc_x, int32_t crtc_y,
uint32_t crtc_w, uint32_t crtc_h,
/* src_{x,y,w,h} values are 16.16 fixed point */
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
int ret;
drm_modeset_lock_all(plane->dev);
ret = __setplane_internal(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
src_x, src_y, src_w, src_h);
drm_modeset_unlock_all(plane->dev);
return ret;
}
/**
* drm_mode_setplane - configure a plane's configuration
* @dev: DRM device
* @data: ioctl data*
* @file_priv: DRM file info
*
* Set plane configuration, including placement, fb, scaling, and other factors.
* Or pass a NULL fb to disable (planes may be disabled without providing a
* valid crtc).
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_setplane(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_set_plane *plane_req = data;
struct drm_plane *plane;
struct drm_crtc *crtc = NULL;
struct drm_framebuffer *fb = NULL;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
/* Give drivers some help against integer overflows */
if (plane_req->crtc_w > INT_MAX ||
plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
plane_req->crtc_h > INT_MAX ||
plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
plane_req->crtc_w, plane_req->crtc_h,
plane_req->crtc_x, plane_req->crtc_y);
return -ERANGE;
}
/*
* First, find the plane, crtc, and fb objects. If not available,
* we don't bother to call the driver.
*/
plane = drm_plane_find(dev, plane_req->plane_id);
if (!plane) {
DRM_DEBUG_KMS("Unknown plane ID %d\n",
plane_req->plane_id);
return -ENOENT;
}
if (plane_req->fb_id) {
fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
if (!fb) {
DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
plane_req->fb_id);
return -ENOENT;
}
crtc = drm_crtc_find(dev, plane_req->crtc_id);
if (!crtc) {
DRM_DEBUG_KMS("Unknown crtc ID %d\n",
plane_req->crtc_id);
return -ENOENT;
}
}
/*
* setplane_internal will take care of deref'ing either the old or new
* framebuffer depending on success.
*/
return setplane_internal(plane, crtc, fb,
plane_req->crtc_x, plane_req->crtc_y,
plane_req->crtc_w, plane_req->crtc_h,
plane_req->src_x, plane_req->src_y,
plane_req->src_w, plane_req->src_h);
}
/**
* drm_mode_set_config_internal - helper to call ->set_config
* @set: modeset config to set
*
* This is a little helper to wrap internal calls to the ->set_config driver
* interface. The only thing it adds is correct refcounting dance.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_set_config_internal(struct drm_mode_set *set)
{
struct drm_crtc *crtc = set->crtc;
struct drm_framebuffer *fb;
struct drm_crtc *tmp;
int ret;
/*
* NOTE: ->set_config can also disable other crtcs (if we steal all
* connectors from it), hence we need to refcount the fbs across all
* crtcs. Atomic modeset will have saner semantics ...
*/
list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head)
tmp->primary->old_fb = tmp->primary->fb;
fb = set->fb;
ret = crtc->funcs->set_config(set);
if (ret == 0) {
crtc->primary->crtc = crtc;
crtc->primary->fb = fb;
}
list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
if (tmp->primary->fb)
drm_framebuffer_reference(tmp->primary->fb);
if (tmp->primary->old_fb)
drm_framebuffer_unreference(tmp->primary->old_fb);
tmp->primary->old_fb = NULL;
}
return ret;
}
EXPORT_SYMBOL(drm_mode_set_config_internal);
/**
* drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
* @mode: mode to query
* @hdisplay: hdisplay value to fill in
* @vdisplay: vdisplay value to fill in
*
* The vdisplay value will be doubled if the specified mode is a stereo mode of
* the appropriate layout.
*/
void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
int *hdisplay, int *vdisplay)
{
struct drm_display_mode adjusted;
drm_mode_copy(&adjusted, mode);
drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
*hdisplay = adjusted.crtc_hdisplay;
*vdisplay = adjusted.crtc_vdisplay;
}
EXPORT_SYMBOL(drm_crtc_get_hv_timing);
/**
* drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
* CRTC viewport
* @crtc: CRTC that framebuffer will be displayed on
* @x: x panning
* @y: y panning
* @mode: mode that framebuffer will be displayed under
* @fb: framebuffer to check size of
*/
int drm_crtc_check_viewport(const struct drm_crtc *crtc,
int x, int y,
const struct drm_display_mode *mode,
const struct drm_framebuffer *fb)
{
int hdisplay, vdisplay;
drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
if (crtc->invert_dimensions)
swap(hdisplay, vdisplay);
if (hdisplay > fb->width ||
vdisplay > fb->height ||
x > fb->width - hdisplay ||
y > fb->height - vdisplay) {
DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
fb->width, fb->height, hdisplay, vdisplay, x, y,
crtc->invert_dimensions ? " (inverted)" : "");
return -ENOSPC;
}
return 0;
}
EXPORT_SYMBOL(drm_crtc_check_viewport);
/**
* drm_mode_setcrtc - set CRTC configuration
* @dev: drm device for the ioctl
* @data: data pointer for the ioctl
* @file_priv: drm file for the ioctl call
*
* Build a new CRTC configuration based on user request.
*
* Called by the user via ioctl.
*
* Returns:
* Zero on success, negative errno on failure.
*/
int drm_mode_setcrtc(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_mode_config *config = &dev->mode_config;
struct drm_mode_crtc *crtc_req = data;
struct drm_crtc *crtc;
struct drm_connector **connector_set = NULL, *connector;
struct drm_framebuffer *fb = NULL;
struct drm_display_mode *mode = NULL;
struct drm_mode_set set;
uint32_t __user *set_connectors_ptr;
int ret;
int i;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
/* For some reason crtc x/y offsets are signed internally. */
if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
return -ERANGE;
drm_modeset_lock_all(dev);
crtc = drm_crtc_find(dev, crtc_req->crtc_id);
if (!crtc) {
DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
ret = -ENOENT;
goto out;
}
DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
if (crtc_req->mode_valid) {
/* If we have a mode we need a framebuffer. */
/* If we pass -1, set the mode with the currently bound fb */
if (crtc_req->fb_id == -1) {
if (!crtc->primary->fb) {
DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
ret = -EINVAL;
goto out;
}
fb = crtc->primary->fb;
/* Make refcounting symmetric with the lookup path. */
drm_framebuffer_reference(fb);
} else {
fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
if (!fb) {
DRM_DEBUG_KMS("Unknown FB ID%d\n",
crtc_req->fb_id);
ret = -ENOENT;
goto out;
}
}
mode = drm_mode_create(dev);
if (!mode) {
ret = -ENOMEM;
goto out;
}
ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
if (ret) {
DRM_DEBUG_KMS("Invalid mode\n");
goto out;
}
mode->status = drm_mode_validate_basic(mode);
if (mode->status != MODE_OK) {
ret = -EINVAL;
goto out;
}
drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
mode, fb);
if (ret)
goto out;
}
if (crtc_req->count_connectors == 0 && mode) {
DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
ret = -EINVAL;
goto out;
}
if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
crtc_req->count_connectors);
ret = -EINVAL;
goto out;
}
if (crtc_req->count_connectors > 0) {
u32 out_id;
/* Avoid unbounded kernel memory allocation */
if (crtc_req->count_connectors > config->num_connector) {
ret = -EINVAL;
goto out;
}
connector_set = kmalloc_array(crtc_req->count_connectors,
sizeof(struct drm_connector *),
GFP_KERNEL);
if (!connector_set) {
ret = -ENOMEM;
goto out;
}
for (i = 0; i < crtc_req->count_connectors; i++) {
set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
if (get_user(out_id, &set_connectors_ptr[i])) {
ret = -EFAULT;
goto out;
}
connector = drm_connector_find(dev, out_id);
if (!connector) {
DRM_DEBUG_KMS("Connector id %d unknown\n",
out_id);
ret = -ENOENT;
goto out;
}
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
connector->base.id,
connector->name);
connector_set[i] = connector;
}
}