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drm: Allow userspace to ask for universal plane list (v2)

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Userspace clients which wish to receive all DRM planes (primary and
cursor planes in addition to the traditional overlay planes) may set the
DRM_CLIENT_CAP_UNIVERSAL_PLANES capability.

v2: Hide behind drm.universal_planes module option [suggested by
    Daniel Vetter]

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Matt Roper 2014-04-01 15:22:42 -07:00 committed by Rob Clark
parent 780f598471
commit 681e7ec730
5 changed files with 41 additions and 5 deletions
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20
drivers/gpu/drm/drm_crtc.c
View File

@ -1959,6 +1959,7 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
struct drm_plane *plane;
uint32_t __user *plane_ptr;
int copied = 0, ret = 0;
unsigned num_planes;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EINVAL;
@ -1966,17 +1967,26 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
drm_modeset_lock_all(dev);
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 (config->num_overlay_plane &&
(plane_resp->count_planes >= config->num_overlay_plane)) {
if (num_planes &&
(plane_resp->count_planes >= num_planes)) {
plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
list_for_each_entry(plane, &config->plane_list, head) {
/* Only advertise overlays to userspace for now. */
if (plane->type != DRM_PLANE_TYPE_OVERLAY)
/*
* 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)) {
@ -1986,7 +1996,7 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
copied++;
}
}
plane_resp->count_planes = config->num_overlay_plane;
plane_resp->count_planes = num_planes;
out:
drm_modeset_unlock_all(dev);

7
drivers/gpu/drm/drm_ioctl.c
View File

@ -328,6 +328,13 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
return -EINVAL;
file_priv->stereo_allowed = req->value;
break;
case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
if (!drm_universal_planes)
return -EINVAL;
if (req->value > 1)
return -EINVAL;
file_priv->universal_planes = req->value;
break;
default:
return -EINVAL;
}

5
drivers/gpu/drm/drm_stub.c
View File

@ -45,6 +45,10 @@ EXPORT_SYMBOL(drm_debug);
unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */
EXPORT_SYMBOL(drm_rnodes);
/* 1 to allow user space to request universal planes (experimental) */
unsigned int drm_universal_planes = 0;
EXPORT_SYMBOL(drm_universal_planes);
unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */
EXPORT_SYMBOL(drm_vblank_offdelay);
@ -68,6 +72,7 @@ MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps");
module_param_named(debug, drm_debug, int, 0600);
module_param_named(rnodes, drm_rnodes, int, 0600);
module_param_named(universal_planes, drm_universal_planes, int, 0600);
module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600);
module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600);

6
include/drm/drmP.h
View File

@ -409,6 +409,11 @@ struct drm_file {
unsigned is_master :1;
/* true when the client has asked us to expose stereo 3D mode flags */
unsigned stereo_allowed :1;
/*
* true if client understands CRTC primary planes and cursor planes
* in the plane list
*/
unsigned universal_planes:1;
struct pid *pid;
kuid_t uid;
@ -1409,6 +1414,7 @@ extern void drm_put_dev(struct drm_device *dev);
extern void drm_unplug_dev(struct drm_device *dev);
extern unsigned int drm_debug;
extern unsigned int drm_rnodes;
extern unsigned int drm_universal_planes;
extern unsigned int drm_vblank_offdelay;
extern unsigned int drm_timestamp_precision;

8
include/uapi/drm/drm.h
View File

@ -637,6 +637,14 @@ struct drm_get_cap {
*/
#define DRM_CLIENT_CAP_STEREO_3D 1
/**
* DRM_CLIENT_CAP_UNIVERSAL_PLANES
*
* If set to 1, the DRM core will expose all planes (overlay, primary, and
* cursor) to userspace.
*/
#define DRM_CLIENT_CAP_UNIVERSAL_PLANES 2
/** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */
struct drm_set_client_cap {
__u64 capability;