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Commit 4271a409 authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/prime: expose capability flags for userspace. 



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.

Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent cfcbd6d3

drivers/gpu/drm/drm_ioctl.c

+4 −0
Original line number Diff line number Diff line
@@ -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;

	}

include/drm/drm.h

+4 −0
Original line number Diff line number Diff line
@@ -777,6 +777,10 @@ 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__