From: Dave Airlie <airlied@xxxxxxxxxx>
This lets the kernel tell userspace if the device supports prime
import/export.
This is useful for -modesetting at least, but would be nice for other
drivers.
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
---
drivers/gpu/drm/drm_ioctl.c | 4 ++++
include/drm/drm.h | 4 ++++
2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index cf85155..64a62c6 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -283,6 +283,10 @@ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
case DRM_CAP_DUMB_PREFER_SHADOW:
req->value = dev->mode_config.prefer_shadow;
break;
+ case DRM_CAP_PRIME:
+ req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
+ req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
+ break;
default:
return -EINVAL;
}
diff --git a/include/drm/drm.h b/include/drm/drm.h
index 64ff02d..34d6335 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -775,6 +775,10 @@ struct drm_event_vblank {
#define DRM_CAP_VBLANK_HIGH_CRTC 0x2
#define DRM_CAP_DUMB_PREFERRED_DEPTH 0x3
#define DRM_CAP_DUMB_PREFER_SHADOW 0x4
+#define DRM_CAP_PRIME 0x5
+
+#define DRM_PRIME_CAP_IMPORT 0x1
+#define DRM_PRIME_CAP_EXPORT 0x2
/* typedef area */
#ifndef __KERNEL__
--
1.7.7.6
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