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drm: Add a SET_CLIENT_CAP ioctl 

This ioctl can be used to turn some knobs in a DRM driver. The client
can ask the DRM core for an alternate view of the reality: it can be
useful to be able to instruct the core that the DRM client can handle
new functionnality that would otherwise break current ABI.

v2: Rename to ioctl from SET_CAP to SET_CLIENT_CAP (Chris Wilson)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-09-25 16:45:20 +01:00 committed by Daniel Vetter
parent a99b57dbc0
commit 1c0814fed3
4 changed files with 19 additions and 0 deletions
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1
drivers/gpu/drm/drm_drv.c
View File

@ -69,6 +69,7 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),

9
drivers/gpu/drm/drm_ioctl.c
View File

@ -302,6 +302,15 @@ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
return 0;
}
/**
* Set device/driver capabilities
*/
int
drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
return -EINVAL;
}
/**
* Setversion ioctl.
*

2
include/drm/drmP.h
View File

@ -1303,6 +1303,8 @@ extern int drm_getstats(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_getcap(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_setclientcap(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_setversion(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_noop(struct drm_device *dev, void *data,

7
include/uapi/drm/drm.h
View File

@ -627,6 +627,12 @@ struct drm_get_cap {
__u64 value;
};
/** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */
struct drm_set_client_cap {
__u64 capability;
__u64 value;
};
#define DRM_CLOEXEC O_CLOEXEC
struct drm_prime_handle {
__u32 handle;
@ -659,6 +665,7 @@ struct drm_prime_handle {
#define DRM_IOCTL_GEM_FLINK DRM_IOWR(0x0a, struct drm_gem_flink)
#define DRM_IOCTL_GEM_OPEN DRM_IOWR(0x0b, struct drm_gem_open)
#define DRM_IOCTL_GET_CAP DRM_IOWR(0x0c, struct drm_get_cap)
#define DRM_IOCTL_SET_CLIENT_CAP DRM_IOW( 0x0d, struct drm_set_client_cap)
#define DRM_IOCTL_SET_UNIQUE DRM_IOW( 0x10, struct drm_unique)
#define DRM_IOCTL_AUTH_MAGIC DRM_IOW( 0x11, struct drm_auth)