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drm/plane: drop num_overlay_planes (v3) 

In order to implement plane leasing we need to count things,
just make the code consistent with the counting code currently
used for counting crtcs/encoders/connectors and drop the need
for num_overlay_planes.

v2: don't forget to assign plane_ptr. (keithp)
v3: use correct bounds check, found by igt.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2017-10-13 00:52:01 +01:00
parent f8d4710458
commit 40d86701a6
3 changed files with 15 additions and 43 deletions
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1
drivers/gpu/drm/drm_mode_config.c
View File

@ -385,7 +385,6 @@ void drm_mode_config_init(struct drm_device *dev)
dev->mode_config.num_connector = 0;
dev->mode_config.num_crtc = 0;
dev->mode_config.num_encoder = 0;
dev->mode_config.num_overlay_plane = 0;
dev->mode_config.num_total_plane = 0;
}
EXPORT_SYMBOL(drm_mode_config_init);

44
drivers/gpu/drm/drm_plane.c
View File

@ -241,8 +241,6 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
list_add_tail(&plane->head, &config->plane_list);
plane->index = 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,
@ -353,8 +351,6 @@ void drm_plane_cleanup(struct drm_plane *plane)
list_del(&plane->head);
dev->mode_config.num_total_plane--;
if (plane->type == DRM_PLANE_TYPE_OVERLAY)
dev->mode_config.num_overlay_plane--;
WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
if (plane->state && plane->funcs->atomic_destroy_state)
@ -462,43 +458,33 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
struct drm_mode_config *config;
struct drm_plane *plane;
uint32_t __user *plane_ptr;
int copied = 0;
unsigned num_planes;
int count = 0;
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;
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.
*/
if (num_planes &&
(plane_resp->count_planes >= num_planes)) {
plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
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;
/* Plane lists are invariant, no locking needed. */
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 (put_user(plane->base.id, plane_ptr + copied))
return -EFAULT;
copied++;
}
if (count < plane_resp->count_planes &&
put_user(plane->base.id, plane_ptr + count))
return -EFAULT;
count++;
}
plane_resp->count_planes = num_planes;
plane_resp->count_planes = count;
return 0;
}

13
include/drm/drm_mode_config.h
View File

@ -429,19 +429,6 @@ struct drm_mode_config {
*/
struct list_head encoder_list;
/**
* @num_overlay_plane:
*
* Number of overlay planes on this device, excluding primary and cursor
* planes.
*
* Track number of overlay planes separately from number of total
* planes. By default we only advertise overlay planes to userspace; if
* userspace sets the "universal plane" capability bit, we'll go ahead
* and expose all planes. This is invariant over the lifetime of a
* device and hence doesn't need any locks.
*/
int num_overlay_plane;
/**
* @num_total_plane:
*