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sys/dev/drm/core/drm_plane.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. | |||||
*/ | |||||
#include <linux/slab.h> | |||||
#include <linux/uaccess.h> | |||||
#include <drm/drm_plane.h> | |||||
#include <drm/drm_drv.h> | |||||
#include <drm/drm_print.h> | |||||
#include <drm/drm_framebuffer.h> | |||||
#include <drm/drm_file.h> | |||||
#include <drm/drm_crtc.h> | |||||
#include <drm/drm_fourcc.h> | |||||
#include <drm/drm_vblank.h> | |||||
#include "drm_crtc_internal.h" | |||||
/** | |||||
* DOC: overview | |||||
* | |||||
* A plane represents an image source that can be blended with or overlayed on | |||||
* top of a CRTC during the scanout process. Planes take their input data from a | |||||
* &drm_framebuffer object. The plane itself specifies the cropping and scaling | |||||
* of that image, and where it is placed on the visible are of a display | |||||
* pipeline, represented by &drm_crtc. A plane can also have additional | |||||
* properties that specify how the pixels are positioned and blended, like | |||||
* rotation or Z-position. All these properties are stored in &drm_plane_state. | |||||
* | |||||
* To create a plane, a KMS drivers allocates and zeroes an instances of | |||||
* &struct drm_plane (possibly as part of a larger structure) and registers it | |||||
* with a call to drm_universal_plane_init(). | |||||
* | |||||
* Cursor and overlay planes are optional. All drivers should provide one | |||||
* primary plane per CRTC to avoid surprising userspace too much. See enum | |||||
* drm_plane_type for a more in-depth discussion of these special uapi-relevant | |||||
* plane types. Special planes are associated with their CRTC by calling | |||||
* drm_crtc_init_with_planes(). | |||||
* | |||||
* The type of a plane is exposed in the immutable "type" enumeration property, | |||||
* which has one of the following values: "Overlay", "Primary", "Cursor". | |||||
*/ | |||||
static unsigned int drm_num_planes(struct drm_device *dev) | |||||
{ | |||||
unsigned int num = 0; | |||||
struct drm_plane *tmp; | |||||
drm_for_each_plane(tmp, dev) { | |||||
num++; | |||||
} | |||||
return num; | |||||
} | |||||
static inline u32 * | |||||
formats_ptr(struct drm_format_modifier_blob *blob) | |||||
{ | |||||
return (u32 *)(((char *)blob) + blob->formats_offset); | |||||
} | |||||
static inline struct drm_format_modifier * | |||||
modifiers_ptr(struct drm_format_modifier_blob *blob) | |||||
{ | |||||
return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset); | |||||
} | |||||
static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane) | |||||
{ | |||||
const struct drm_mode_config *config = &dev->mode_config; | |||||
struct drm_property_blob *blob; | |||||
struct drm_format_modifier *mod; | |||||
size_t blob_size, formats_size, modifiers_size; | |||||
struct drm_format_modifier_blob *blob_data; | |||||
unsigned int i, j; | |||||
formats_size = sizeof(__u32) * plane->format_count; | |||||
if (WARN_ON(!formats_size)) { | |||||
/* 0 formats are never expected */ | |||||
return 0; | |||||
} | |||||
modifiers_size = | |||||
sizeof(struct drm_format_modifier) * plane->modifier_count; | |||||
blob_size = sizeof(struct drm_format_modifier_blob); | |||||
/* Modifiers offset is a pointer to a struct with a 64 bit field so it | |||||
* should be naturally aligned to 8B. | |||||
*/ | |||||
BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8); | |||||
blob_size += ALIGN(formats_size, 8); | |||||
blob_size += modifiers_size; | |||||
blob = drm_property_create_blob(dev, blob_size, NULL); | |||||
if (IS_ERR(blob)) | |||||
return -1; | |||||
blob_data = blob->data; | |||||
blob_data->version = FORMAT_BLOB_CURRENT; | |||||
blob_data->count_formats = plane->format_count; | |||||
blob_data->formats_offset = sizeof(struct drm_format_modifier_blob); | |||||
blob_data->count_modifiers = plane->modifier_count; | |||||
blob_data->modifiers_offset = | |||||
ALIGN(blob_data->formats_offset + formats_size, 8); | |||||
memcpy(formats_ptr(blob_data), plane->format_types, formats_size); | |||||
/* If we can't determine support, just bail */ | |||||
if (!plane->funcs->format_mod_supported) | |||||
goto done; | |||||
mod = modifiers_ptr(blob_data); | |||||
for (i = 0; i < plane->modifier_count; i++) { | |||||
for (j = 0; j < plane->format_count; j++) { | |||||
if (plane->funcs->format_mod_supported(plane, | |||||
plane->format_types[j], | |||||
plane->modifiers[i])) { | |||||
mod->formats |= 1ULL << j; | |||||
} | |||||
} | |||||
mod->modifier = plane->modifiers[i]; | |||||
mod->offset = 0; | |||||
mod->pad = 0; | |||||
mod++; | |||||
} | |||||
done: | |||||
drm_object_attach_property(&plane->base, config->modifiers_property, | |||||
blob->base.id); | |||||
return 0; | |||||
} | |||||
/** | |||||
* 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 | |||||
* @format_modifiers: array of struct drm_format modifiers terminated by | |||||
* DRM_FORMAT_MOD_INVALID | |||||
* @type: type of plane (overlay, primary, cursor) | |||||
* @name: printf style format string for the plane name, or NULL for default name | |||||
* | |||||
* 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, | |||||
uint32_t possible_crtcs, | |||||
const struct drm_plane_funcs *funcs, | |||||
const uint32_t *formats, unsigned int format_count, | |||||
const uint64_t *format_modifiers, | |||||
enum drm_plane_type type, | |||||
const char *name, ...) | |||||
{ | |||||
struct drm_mode_config *config = &dev->mode_config; | |||||
unsigned int format_modifier_count = 0; | |||||
int ret; | |||||
/* plane index is used with 32bit bitmasks */ | |||||
if (WARN_ON(config->num_total_plane >= 32)) | |||||
return -EINVAL; | |||||
WARN_ON(drm_drv_uses_atomic_modeset(dev) && | |||||
(!funcs->atomic_destroy_state || | |||||
!funcs->atomic_duplicate_state)); | |||||
ret = drm_mode_object_add(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_unregister(dev, &plane->base); | |||||
return -ENOMEM; | |||||
} | |||||
/* | |||||
* First driver to need more than 64 formats needs to fix this. Each | |||||
* format is encoded as a bit and the current code only supports a u64. | |||||
*/ | |||||
if (WARN_ON(format_count > 64)) | |||||
return -EINVAL; | |||||
if (format_modifiers) { | |||||
const uint64_t *temp_modifiers = format_modifiers; | |||||
while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID) | |||||
format_modifier_count++; | |||||
} | |||||
if (format_modifier_count) | |||||
config->allow_fb_modifiers = true; | |||||
plane->modifier_count = format_modifier_count; | |||||
plane->modifiers = kmalloc_array(format_modifier_count, | |||||
sizeof(format_modifiers[0]), | |||||
GFP_KERNEL); | |||||
if (format_modifier_count && !plane->modifiers) { | |||||
DRM_DEBUG_KMS("out of memory when allocating plane\n"); | |||||
kfree(plane->format_types); | |||||
drm_mode_object_unregister(dev, &plane->base); | |||||
return -ENOMEM; | |||||
} | |||||
if (name) { | |||||
va_list ap; | |||||
va_start(ap, name); | |||||
plane->name = kvasprintf(GFP_KERNEL, name, ap); | |||||
va_end(ap); | |||||
} else { | |||||
plane->name = kasprintf(GFP_KERNEL, "plane-%d", | |||||
drm_num_planes(dev)); | |||||
} | |||||
if (!plane->name) { | |||||
kfree(plane->format_types); | |||||
kfree(plane->modifiers); | |||||
drm_mode_object_unregister(dev, &plane->base); | |||||
return -ENOMEM; | |||||
} | |||||
memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); | |||||
plane->format_count = format_count; | |||||
memcpy(plane->modifiers, format_modifiers, | |||||
format_modifier_count * sizeof(format_modifiers[0])); | |||||
plane->possible_crtcs = possible_crtcs; | |||||
plane->type = type; | |||||
list_add_tail(&plane->head, &config->plane_list); | |||||
plane->index = config->num_total_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_in_fence_fd, -1); | |||||
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); | |||||
} | |||||
if (config->allow_fb_modifiers) | |||||
create_in_format_blob(dev, plane); | |||||
return 0; | |||||
} | |||||
EXPORT_SYMBOL(drm_universal_plane_init); | |||||
int drm_plane_register_all(struct drm_device *dev) | |||||
{ | |||||
struct drm_plane *plane; | |||||
int ret = 0; | |||||
drm_for_each_plane(plane, dev) { | |||||
if (plane->funcs->late_register) | |||||
ret = plane->funcs->late_register(plane); | |||||
if (ret) | |||||
return ret; | |||||
} | |||||
return 0; | |||||
} | |||||
void drm_plane_unregister_all(struct drm_device *dev) | |||||
{ | |||||
struct drm_plane *plane; | |||||
drm_for_each_plane(plane, dev) { | |||||
if (plane->funcs->early_unregister) | |||||
plane->funcs->early_unregister(plane); | |||||
} | |||||
} | |||||
/** | |||||
* 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, | |||||
uint32_t possible_crtcs, | |||||
const struct drm_plane_funcs *funcs, | |||||
const uint32_t *formats, unsigned int 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, | |||||
NULL, type, NULL); | |||||
} | |||||
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_fini(&plane->mutex); | |||||
kfree(plane->format_types); | |||||
kfree(plane->modifiers); | |||||
drm_mode_object_unregister(dev, &plane->base); | |||||
BUG_ON(list_empty(&plane->head)); | |||||
/* Note that the plane_list is considered to be static; should we | |||||
* remove the drm_plane at runtime we would have to decrement all | |||||
* the indices on the drm_plane after us in the plane_list. | |||||
*/ | |||||
list_del(&plane->head); | |||||
dev->mode_config.num_total_plane--; | |||||
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); | |||||
kfree(plane->name); | |||||
memset(plane, 0, sizeof(*plane)); | |||||
} | |||||
EXPORT_SYMBOL(drm_plane_cleanup); | |||||
/** | |||||
* drm_plane_from_index - find the registered plane at an index | |||||
* @dev: DRM device | |||||
* @idx: index of registered plane to find for | |||||
* | |||||
* Given a plane index, return the registered plane from DRM device's | |||||
* list of planes with matching index. This is the inverse of drm_plane_index(). | |||||
*/ | |||||
struct drm_plane * | |||||
drm_plane_from_index(struct drm_device *dev, int idx) | |||||
{ | |||||
struct drm_plane *plane; | |||||
drm_for_each_plane(plane, dev) | |||||
if (idx == plane->index) | |||||
return plane; | |||||
return NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_plane_from_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. | |||||
* | |||||
* Note that this function is not suitable for atomic drivers, since it doesn't | |||||
* wire through the lock acquisition context properly and hence can't handle | |||||
* retries or driver private locks. You probably want to use | |||||
* drm_atomic_helper_disable_plane() or | |||||
* drm_atomic_helper_disable_planes_on_crtc() instead. | |||||
*/ | |||||
void drm_plane_force_disable(struct drm_plane *plane) | |||||
{ | |||||
int ret; | |||||
if (!plane->fb) | |||||
return; | |||||
WARN_ON(drm_drv_uses_atomic_modeset(plane->dev)); | |||||
plane->old_fb = plane->fb; | |||||
ret = plane->funcs->disable_plane(plane, NULL); | |||||
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_put(plane->old_fb); | |||||
plane->old_fb = NULL; | |||||
plane->fb = NULL; | |||||
plane->crtc = NULL; | |||||
} | |||||
EXPORT_SYMBOL(drm_plane_force_disable); | |||||
/** | |||||
* drm_mode_plane_set_obj_prop - set the value of a property | |||||
* @plane: drm plane object to set property value for | |||||
* @property: property to set | |||||
* @value: value the property should be set to | |||||
* | |||||
* This functions sets a given property on a given plane object. This function | |||||
* calls the driver's ->set_property callback and changes the software state of | |||||
* the property if the callback succeeds. | |||||
* | |||||
* Returns: | |||||
* Zero on success, error code on failure. | |||||
*/ | |||||
int drm_mode_plane_set_obj_prop(struct drm_plane *plane, | |||||
struct drm_property *property, | |||||
uint64_t value) | |||||
{ | |||||
int ret = -EINVAL; | |||||
struct drm_mode_object *obj = &plane->base; | |||||
if (plane->funcs->set_property) | |||||
ret = plane->funcs->set_property(plane, property, value); | |||||
if (!ret) | |||||
drm_object_property_set_value(obj, property, value); | |||||
return ret; | |||||
} | |||||
EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); | |||||
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_plane *plane; | |||||
uint32_t __user *plane_ptr; | |||||
int count = 0; | |||||
if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |||||
return -EOPNOTSUPP; | |||||
plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr); | |||||
/* | |||||
* This ioctl is called twice, once to determine how much space is | |||||
* needed, and the 2nd time to fill it. | |||||
*/ | |||||
drm_for_each_plane(plane, dev) { | |||||
/* | |||||
* Unless userspace set the 'universal planes' | |||||
* capability bit, only advertise overlays. | |||||
*/ | |||||
if (plane->type != DRM_PLANE_TYPE_OVERLAY && | |||||
!file_priv->universal_planes) | |||||
continue; | |||||
if (drm_lease_held(file_priv, plane->base.id)) { | |||||
if (count < plane_resp->count_planes && | |||||
put_user(plane->base.id, plane_ptr + count)) | |||||
return -EFAULT; | |||||
count++; | |||||
} | |||||
} | |||||
plane_resp->count_planes = count; | |||||
return 0; | |||||
} | |||||
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 -EOPNOTSUPP; | |||||
plane = drm_plane_find(dev, file_priv, plane_resp->plane_id); | |||||
if (!plane) | |||||
return -ENOENT; | |||||
drm_modeset_lock(&plane->mutex, NULL); | |||||
if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id)) | |||||
plane_resp->crtc_id = plane->state->crtc->base.id; | |||||
else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id)) | |||||
plane_resp->crtc_id = plane->crtc->base.id; | |||||
else | |||||
plane_resp->crtc_id = 0; | |||||
if (plane->state && plane->state->fb) | |||||
plane_resp->fb_id = plane->state->fb->base.id; | |||||
else if (!plane->state && 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 = drm_lease_filter_crtcs(file_priv, | |||||
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; | |||||
} | |||||
int drm_plane_check_pixel_format(struct drm_plane *plane, | |||||
u32 format, u64 modifier) | |||||
{ | |||||
unsigned int i; | |||||
for (i = 0; i < plane->format_count; i++) { | |||||
if (format == plane->format_types[i]) | |||||
break; | |||||
} | |||||
if (i == plane->format_count) | |||||
return -EINVAL; | |||||
if (plane->funcs->format_mod_supported) { | |||||
if (!plane->funcs->format_mod_supported(plane, format, modifier)) | |||||
return -EINVAL; | |||||
} else { | |||||
if (!plane->modifier_count) | |||||
return 0; | |||||
for (i = 0; i < plane->modifier_count; i++) { | |||||
if (modifier == plane->modifiers[i]) | |||||
break; | |||||
} | |||||
if (i == plane->modifier_count) | |||||
return -EINVAL; | |||||
} | |||||
return 0; | |||||
} | |||||
static int __setplane_check(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, | |||||
uint32_t src_x, uint32_t src_y, | |||||
uint32_t src_w, uint32_t src_h) | |||||
{ | |||||
int ret; | |||||
/* 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"); | |||||
return -EINVAL; | |||||
} | |||||
/* Check whether this plane supports the fb pixel format. */ | |||||
ret = drm_plane_check_pixel_format(plane, fb->format->format, | |||||
fb->modifier); | |||||
if (ret) { | |||||
struct drm_format_name_buf format_name; | |||||
DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n", | |||||
drm_get_format_name(fb->format->format, | |||||
&format_name), | |||||
fb->modifier); | |||||
return ret; | |||||
} | |||||
/* Give drivers some help against integer overflows */ | |||||
if (crtc_w > INT_MAX || | |||||
crtc_x > INT_MAX - (int32_t) crtc_w || | |||||
crtc_h > INT_MAX || | |||||
crtc_y > INT_MAX - (int32_t) crtc_h) { | |||||
DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", | |||||
crtc_w, crtc_h, crtc_x, crtc_y); | |||||
return -ERANGE; | |||||
} | |||||
ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb); | |||||
if (ret) | |||||
return ret; | |||||
return 0; | |||||
} | |||||
/** | |||||
* drm_any_plane_has_format - Check whether any plane supports this format and modifier combination | |||||
* @dev: DRM device | |||||
* @format: pixel format (DRM_FORMAT_*) | |||||
* @modifier: data layout modifier | |||||
* | |||||
* Returns: | |||||
* Whether at least one plane supports the specified format and modifier combination. | |||||
*/ | |||||
bool drm_any_plane_has_format(struct drm_device *dev, | |||||
u32 format, u64 modifier) | |||||
{ | |||||
struct drm_plane *plane; | |||||
drm_for_each_plane(plane, dev) { | |||||
if (drm_plane_check_pixel_format(plane, format, modifier) == 0) | |||||
return true; | |||||
} | |||||
return false; | |||||
} | |||||
EXPORT_SYMBOL(drm_any_plane_has_format); | |||||
/* | |||||
* __setplane_internal - setplane handler for internal callers | |||||
* | |||||
* This function will take a reference on the new fb for the plane | |||||
* on success. | |||||
* | |||||
* 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, | |||||
struct drm_modeset_acquire_ctx *ctx) | |||||
{ | |||||
int ret = 0; | |||||
WARN_ON(drm_drv_uses_atomic_modeset(plane->dev)); | |||||
/* No fb means shut it down */ | |||||
if (!fb) { | |||||
plane->old_fb = plane->fb; | |||||
ret = plane->funcs->disable_plane(plane, ctx); | |||||
if (!ret) { | |||||
plane->crtc = NULL; | |||||
plane->fb = NULL; | |||||
} else { | |||||
plane->old_fb = NULL; | |||||
} | |||||
goto out; | |||||
} | |||||
ret = __setplane_check(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
src_x, src_y, src_w, src_h); | |||||
if (ret) | |||||
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, ctx); | |||||
if (!ret) { | |||||
plane->crtc = crtc; | |||||
plane->fb = fb; | |||||
drm_framebuffer_get(plane->fb); | |||||
} else { | |||||
plane->old_fb = NULL; | |||||
} | |||||
out: | |||||
if (plane->old_fb) | |||||
drm_framebuffer_put(plane->old_fb); | |||||
plane->old_fb = NULL; | |||||
return ret; | |||||
} | |||||
static int __setplane_atomic(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, | |||||
uint32_t src_x, uint32_t src_y, | |||||
uint32_t src_w, uint32_t src_h, | |||||
struct drm_modeset_acquire_ctx *ctx) | |||||
{ | |||||
int ret; | |||||
WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev)); | |||||
/* No fb means shut it down */ | |||||
if (!fb) | |||||
return plane->funcs->disable_plane(plane, ctx); | |||||
/* | |||||
* FIXME: This is redundant with drm_atomic_plane_check(), | |||||
* but the legacy cursor/"async" .update_plane() tricks | |||||
* don't call that so we still need this here. Should remove | |||||
* this when all .update_plane() implementations have been | |||||
* fixed to call drm_atomic_plane_check(). | |||||
*/ | |||||
ret = __setplane_check(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
src_x, src_y, src_w, src_h); | |||||
if (ret) | |||||
return ret; | |||||
return plane->funcs->update_plane(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
src_x, src_y, src_w, src_h, ctx); | |||||
} | |||||
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) | |||||
{ | |||||
struct drm_modeset_acquire_ctx ctx; | |||||
int ret; | |||||
DRM_MODESET_LOCK_ALL_BEGIN(plane->dev, ctx, | |||||
DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret); | |||||
if (drm_drv_uses_atomic_modeset(plane->dev)) | |||||
ret = __setplane_atomic(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
src_x, src_y, src_w, src_h, &ctx); | |||||
else | |||||
ret = __setplane_internal(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
src_x, src_y, src_w, src_h, &ctx); | |||||
DRM_MODESET_LOCK_ALL_END(ctx, ret); | |||||
return ret; | |||||
} | |||||
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; | |||||
int ret; | |||||
if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |||||
return -EOPNOTSUPP; | |||||
/* | |||||
* First, find the plane, crtc, and fb objects. If not available, | |||||
* we don't bother to call the driver. | |||||
*/ | |||||
plane = drm_plane_find(dev, file_priv, 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, file_priv, 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, file_priv, plane_req->crtc_id); | |||||
if (!crtc) { | |||||
drm_framebuffer_put(fb); | |||||
DRM_DEBUG_KMS("Unknown crtc ID %d\n", | |||||
plane_req->crtc_id); | |||||
return -ENOENT; | |||||
} | |||||
} | |||||
ret = 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); | |||||
if (fb) | |||||
drm_framebuffer_put(fb); | |||||
return ret; | |||||
} | |||||
static int drm_mode_cursor_universal(struct drm_crtc *crtc, | |||||
struct drm_mode_cursor2 *req, | |||||
struct drm_file *file_priv, | |||||
struct drm_modeset_acquire_ctx *ctx) | |||||
{ | |||||
struct drm_device *dev = crtc->dev; | |||||
struct drm_plane *plane = crtc->cursor; | |||||
struct drm_framebuffer *fb = NULL; | |||||
struct drm_mode_fb_cmd2 fbreq = { | |||||
.width = req->width, | |||||
.height = req->height, | |||||
.pixel_format = DRM_FORMAT_ARGB8888, | |||||
.pitches = { req->width * 4 }, | |||||
.handles = { req->handle }, | |||||
}; | |||||
int32_t crtc_x, crtc_y; | |||||
uint32_t crtc_w = 0, crtc_h = 0; | |||||
uint32_t src_w = 0, src_h = 0; | |||||
int ret = 0; | |||||
BUG_ON(!plane); | |||||
WARN_ON(plane->crtc != crtc && plane->crtc != NULL); | |||||
/* | |||||
* Obtain fb we'll be using (either new or existing) and take an extra | |||||
* reference to it if fb != null. setplane will take care of dropping | |||||
* the reference if the plane update fails. | |||||
*/ | |||||
if (req->flags & DRM_MODE_CURSOR_BO) { | |||||
if (req->handle) { | |||||
fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv); | |||||
if (IS_ERR(fb)) { | |||||
DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); | |||||
return PTR_ERR(fb); | |||||
} | |||||
fb->hot_x = req->hot_x; | |||||
fb->hot_y = req->hot_y; | |||||
} else { | |||||
fb = NULL; | |||||
} | |||||
} else { | |||||
if (plane->state) | |||||
fb = plane->state->fb; | |||||
else | |||||
fb = plane->fb; | |||||
if (fb) | |||||
drm_framebuffer_get(fb); | |||||
} | |||||
if (req->flags & DRM_MODE_CURSOR_MOVE) { | |||||
crtc_x = req->x; | |||||
crtc_y = req->y; | |||||
} else { | |||||
crtc_x = crtc->cursor_x; | |||||
crtc_y = crtc->cursor_y; | |||||
} | |||||
if (fb) { | |||||
crtc_w = fb->width; | |||||
crtc_h = fb->height; | |||||
src_w = fb->width << 16; | |||||
src_h = fb->height << 16; | |||||
} | |||||
if (drm_drv_uses_atomic_modeset(dev)) | |||||
ret = __setplane_atomic(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
0, 0, src_w, src_h, ctx); | |||||
else | |||||
ret = __setplane_internal(plane, crtc, fb, | |||||
crtc_x, crtc_y, crtc_w, crtc_h, | |||||
0, 0, src_w, src_h, ctx); | |||||
if (fb) | |||||
drm_framebuffer_put(fb); | |||||
/* Update successful; save new cursor position, if necessary */ | |||||
if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { | |||||
crtc->cursor_x = req->x; | |||||
crtc->cursor_y = req->y; | |||||
} | |||||
return ret; | |||||
} | |||||
static int drm_mode_cursor_common(struct drm_device *dev, | |||||
struct drm_mode_cursor2 *req, | |||||
struct drm_file *file_priv) | |||||
{ | |||||
struct drm_crtc *crtc; | |||||
struct drm_modeset_acquire_ctx ctx; | |||||
int ret = 0; | |||||
if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |||||
return -EOPNOTSUPP; | |||||
if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) | |||||
return -EINVAL; | |||||
crtc = drm_crtc_find(dev, file_priv, req->crtc_id); | |||||
if (!crtc) { | |||||
DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); | |||||
return -ENOENT; | |||||
} | |||||
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); | |||||
retry: | |||||
ret = drm_modeset_lock(&crtc->mutex, &ctx); | |||||
if (ret) | |||||
goto out; | |||||
/* | |||||
* If this crtc has a universal cursor plane, call that plane's update | |||||
* handler rather than using legacy cursor handlers. | |||||
*/ | |||||
if (crtc->cursor) { | |||||
ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx); | |||||
if (ret) | |||||
goto out; | |||||
if (!drm_lease_held(file_priv, crtc->cursor->base.id)) { | |||||
ret = -EACCES; | |||||
goto out; | |||||
} | |||||
ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx); | |||||
goto out; | |||||
} | |||||
if (req->flags & DRM_MODE_CURSOR_BO) { | |||||
if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { | |||||
ret = -ENXIO; | |||||
goto out; | |||||
} | |||||
/* Turns off the cursor if handle is 0 */ | |||||
if (crtc->funcs->cursor_set2) | |||||
ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, | |||||
req->width, req->height, req->hot_x, req->hot_y); | |||||
else | |||||
ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, | |||||
req->width, req->height); | |||||
} | |||||
if (req->flags & DRM_MODE_CURSOR_MOVE) { | |||||
if (crtc->funcs->cursor_move) { | |||||
ret = crtc->funcs->cursor_move(crtc, req->x, req->y); | |||||
} else { | |||||
ret = -EFAULT; | |||||
goto out; | |||||
} | |||||
} | |||||
out: | |||||
if (ret == -EDEADLK) { | |||||
ret = drm_modeset_backoff(&ctx); | |||||
if (!ret) | |||||
goto retry; | |||||
} | |||||
drm_modeset_drop_locks(&ctx); | |||||
drm_modeset_acquire_fini(&ctx); | |||||
return ret; | |||||
} | |||||
int drm_mode_cursor_ioctl(struct drm_device *dev, | |||||
void *data, struct drm_file *file_priv) | |||||
{ | |||||
struct drm_mode_cursor *req = data; | |||||
struct drm_mode_cursor2 new_req; | |||||
memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); | |||||
new_req.hot_x = new_req.hot_y = 0; | |||||
return drm_mode_cursor_common(dev, &new_req, file_priv); | |||||
} | |||||
/* | |||||
* Set the cursor configuration based on user request. This implements the 2nd | |||||
* version of the cursor ioctl, which allows userspace to additionally specify | |||||
* the hotspot of the pointer. | |||||
*/ | |||||
int drm_mode_cursor2_ioctl(struct drm_device *dev, | |||||
void *data, struct drm_file *file_priv) | |||||
{ | |||||
struct drm_mode_cursor2 *req = data; | |||||
return drm_mode_cursor_common(dev, req, file_priv); | |||||
} | |||||
int drm_mode_page_flip_ioctl(struct drm_device *dev, | |||||
void *data, struct drm_file *file_priv) | |||||
{ | |||||
struct drm_mode_crtc_page_flip_target *page_flip = data; | |||||
struct drm_crtc *crtc; | |||||
struct drm_plane *plane; | |||||
struct drm_framebuffer *fb = NULL, *old_fb; | |||||
struct drm_pending_vblank_event *e = NULL; | |||||
u32 target_vblank = page_flip->sequence; | |||||
struct drm_modeset_acquire_ctx ctx; | |||||
int ret = -EINVAL; | |||||
if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |||||
return -EOPNOTSUPP; | |||||
if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS) | |||||
return -EINVAL; | |||||
if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) | |||||
return -EINVAL; | |||||
/* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags | |||||
* can be specified | |||||
*/ | |||||
if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET) | |||||
return -EINVAL; | |||||
if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) | |||||
return -EINVAL; | |||||
crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id); | |||||
if (!crtc) | |||||
return -ENOENT; | |||||
plane = crtc->primary; | |||||
if (!drm_lease_held(file_priv, plane->base.id)) | |||||
return -EACCES; | |||||
if (crtc->funcs->page_flip_target) { | |||||
u32 current_vblank; | |||||
int r; | |||||
r = drm_crtc_vblank_get(crtc); | |||||
if (r) | |||||
return r; | |||||
current_vblank = (u32)drm_crtc_vblank_count(crtc); | |||||
switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) { | |||||
case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE: | |||||
if ((int)(target_vblank - current_vblank) > 1) { | |||||
DRM_DEBUG("Invalid absolute flip target %u, " | |||||
"must be <= %u\n", target_vblank, | |||||
current_vblank + 1); | |||||
drm_crtc_vblank_put(crtc); | |||||
return -EINVAL; | |||||
} | |||||
break; | |||||
case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE: | |||||
if (target_vblank != 0 && target_vblank != 1) { | |||||
DRM_DEBUG("Invalid relative flip target %u, " | |||||
"must be 0 or 1\n", target_vblank); | |||||
drm_crtc_vblank_put(crtc); | |||||
return -EINVAL; | |||||
} | |||||
target_vblank += current_vblank; | |||||
break; | |||||
default: | |||||
target_vblank = current_vblank + | |||||
!(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC); | |||||
break; | |||||
} | |||||
} else if (crtc->funcs->page_flip == NULL || | |||||
(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) { | |||||
return -EINVAL; | |||||
} | |||||
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); | |||||
retry: | |||||
ret = drm_modeset_lock(&crtc->mutex, &ctx); | |||||
if (ret) | |||||
goto out; | |||||
ret = drm_modeset_lock(&plane->mutex, &ctx); | |||||
if (ret) | |||||
goto out; | |||||
if (plane->state) | |||||
old_fb = plane->state->fb; | |||||
else | |||||
old_fb = plane->fb; | |||||
if (old_fb == NULL) { | |||||
/* The framebuffer is currently unbound, presumably | |||||
* due to a hotplug event, that userspace has not | |||||
* yet discovered. | |||||
*/ | |||||
ret = -EBUSY; | |||||
goto out; | |||||
} | |||||
fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id); | |||||
if (!fb) { | |||||
ret = -ENOENT; | |||||
goto out; | |||||
} | |||||
if (plane->state) { | |||||
const struct drm_plane_state *state = plane->state; | |||||
ret = drm_framebuffer_check_src_coords(state->src_x, | |||||
state->src_y, | |||||
state->src_w, | |||||
state->src_h, | |||||
fb); | |||||
} else { | |||||
ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, | |||||
&crtc->mode, fb); | |||||
} | |||||
if (ret) | |||||
goto out; | |||||
if (old_fb->format != fb->format) { | |||||
DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); | |||||
ret = -EINVAL; | |||||
goto out; | |||||
} | |||||
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { | |||||
e = kzalloc(sizeof *e, GFP_KERNEL); | |||||
if (!e) { | |||||
ret = -ENOMEM; | |||||
goto out; | |||||
} | |||||
e->event.base.type = DRM_EVENT_FLIP_COMPLETE; | |||||
e->event.base.length = sizeof(e->event); | |||||
e->event.vbl.user_data = page_flip->user_data; | |||||
e->event.vbl.crtc_id = crtc->base.id; | |||||
ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base); | |||||
if (ret) { | |||||
kfree(e); | |||||
e = NULL; | |||||
goto out; | |||||
} | |||||
} | |||||
plane->old_fb = plane->fb; | |||||
if (crtc->funcs->page_flip_target) | |||||
ret = crtc->funcs->page_flip_target(crtc, fb, e, | |||||
page_flip->flags, | |||||
target_vblank, | |||||
&ctx); | |||||
else | |||||
ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags, | |||||
&ctx); | |||||
if (ret) { | |||||
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) | |||||
drm_event_cancel_free(dev, &e->base); | |||||
/* Keep the old fb, don't unref it. */ | |||||
plane->old_fb = NULL; | |||||
} else { | |||||
if (!plane->state) { | |||||
plane->fb = fb; | |||||
drm_framebuffer_get(fb); | |||||
} | |||||
} | |||||
out: | |||||
if (fb) | |||||
drm_framebuffer_put(fb); | |||||
if (plane->old_fb) | |||||
drm_framebuffer_put(plane->old_fb); | |||||
plane->old_fb = NULL; | |||||
if (ret == -EDEADLK) { | |||||
ret = drm_modeset_backoff(&ctx); | |||||
if (!ret) | |||||
goto retry; | |||||
} | |||||
drm_modeset_drop_locks(&ctx); | |||||
drm_modeset_acquire_fini(&ctx); | |||||
if (ret && crtc->funcs->page_flip_target) | |||||
drm_crtc_vblank_put(crtc); | |||||
return ret; | |||||
} |