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

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Since commit 6b85aa68d9 ("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: Simon Ser <contact@emersion.fr>
Reviewed-by: Jeffrey 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
This commit is contained in:
Simon Ser 2023-07-12 18:32:00 +00:00
parent 2ff4f6d410
commit ad9ee11fdf
1 changed files with 7 additions and 0 deletions
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7
include/uapi/drm/drm.h
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@ -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
/**