Commit ad9ee11f authored by Simon Ser's avatar Simon Ser
Browse files

drm/doc: document that PRIME import/export is always supported 



Since commit 6b85aa68 ("drm: Enable PRIME import/export for all
drivers"), import/export is always supported. Document this so that
user-space knows what to expect.

Signed-off-by: default avatarSimon Ser <contact@emersion.fr>
Reviewed-by: default avatarJeffrey Hugo <quic_jhugo@quicinc.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Jeffrey Hugo <quic_jhugo@quicinc.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20230712183156.191445-1-contact@emersion.fr
parent 2ff4f6d4

include/uapi/drm/drm.h

+7 −0
Original line number Diff line number Diff line
@@ -673,6 +673,9 @@ struct drm_gem_open { 
 * Bitfield of supported PRIME sharing capabilities. See &DRM_PRIME_CAP_IMPORT

 * and &DRM_PRIME_CAP_EXPORT.

 *

 * Starting from kernel version 6.6, both &DRM_PRIME_CAP_IMPORT and

 * &DRM_PRIME_CAP_EXPORT are always advertised.

 *

 * PRIME buffers are exposed as dma-buf file descriptors.

 * See :ref:`prime_buffer_sharing`.

 */
@@ -682,6 +685,8 @@ struct drm_gem_open { 
 *

 * If this bit is set in &DRM_CAP_PRIME, the driver supports importing PRIME

 * buffers via the &DRM_IOCTL_PRIME_FD_TO_HANDLE ioctl.

 *

 * Starting from kernel version 6.6, this bit is always set in &DRM_CAP_PRIME.

 */

#define  DRM_PRIME_CAP_IMPORT		0x1

/**
@@ -689,6 +694,8 @@ struct drm_gem_open { 
 *

 * If this bit is set in &DRM_CAP_PRIME, the driver supports exporting PRIME

 * buffers via the &DRM_IOCTL_PRIME_HANDLE_TO_FD ioctl.

 *

 * Starting from kernel version 6.6, this bit is always set in &DRM_CAP_PRIME.

 */

#define  DRM_PRIME_CAP_EXPORT		0x2

/**