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headers: Add DRM_EVENT_ATOMIC_HW_DONE

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This commit is contained in:
Michel Dänzer 2025-07-18 10:48:05 +02:00 • committed by Michel Dänzer
parent 9ea8a8e93d
commit 6698a28d3a
2 changed files with 41 additions and 2 deletions
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31
include/drm/drm.h
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@ -775,6 +775,13 @@ struct drm_gem_open {
* commits.
*/
#define DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP 0x15
/**
* DRM_CAP_ATOMIC_HW_DONE_EVENT
*
* If set to 1, the kernel supports &DRM_MODE_ATOMIC_HW_DONE_EVENT for atomic
* commits.
*/
#define DRM_CAP_ATOMIC_HW_DONE_EVENT 0x16
/* DRM_IOCTL_GET_CAP ioctl argument type */
struct drm_get_cap {
@ -1326,7 +1333,7 @@ extern "C" {
*
* Event types 0 - 0x7fffffff are generic DRM events, 0x80000000 and
* up are chipset specific. Generic DRM events include &DRM_EVENT_VBLANK,
* &DRM_EVENT_FLIP_COMPLETE and &DRM_EVENT_CRTC_SEQUENCE.
* &DRM_EVENT_FLIP_COMPLETE, &DRM_EVENT_CRTC_SEQUENCE and &DRM_EVENT_ATOMIC_HW_DONE.
*/
struct drm_event {
__u32 type;
@ -1359,6 +1366,17 @@ struct drm_event {
* The event payload is a struct drm_event_crtc_sequence.
*/
#define DRM_EVENT_CRTC_SEQUENCE 0x03
/**
* DRM_EVENT_ATOMIC_HW_DONE - atomic commit HW done event
*
* This event is sent in response to an atomic commit with the
* &DRM_MODE_ATOMIC_HW_DONE_EVENT flag set.
*
* One event is sent per commit.
*
* The event payload is a struct drm_event_atomic_hw_done.
*/
#define DRM_EVENT_ATOMIC_HW_DONE 0x04
struct drm_event_vblank {
struct drm_event base;
@ -1369,6 +1387,17 @@ struct drm_event_vblank {
__u32 crtc_id; /* 0 on older kernels that do not support this */
};
struct drm_event_atomic_hw_done {
struct drm_event base;
__u64 user_data;
/**
* Timestamp corresponding to when programming the commit to HW completed.
*/
__u32 tv_sec;
__u32 tv_usec;
};
/* Event delivered at sequence. Time stamp marks when the first pixel
* of the refresh cycle leaves the display engine for the display
*/

12
include/drm/drm_mode.h
View file

@ -1136,6 +1136,15 @@ struct drm_mode_destroy_dumb {
*/
#define DRM_MODE_ATOMIC_ALLOW_MODESET 0x0400
/**
* DRM_MODE_ATOMIC_HW_DONE_EVENT
*
* Request that the kernel sends back an atomic commit HW done event (see
* struct drm_event_atomic_hw_done) with the &DRM_EVENT_ATOMIC_HW_DONE type when
* programming the atomic commit to HW completes.
*/
#define DRM_MODE_ATOMIC_HW_DONE_EVENT 0x0800
/**
* DRM_MODE_ATOMIC_FLAGS
*
@ -1147,7 +1156,8 @@ struct drm_mode_destroy_dumb {
DRM_MODE_PAGE_FLIP_ASYNC |\
DRM_MODE_ATOMIC_TEST_ONLY |\
DRM_MODE_ATOMIC_NONBLOCK |\
DRM_MODE_ATOMIC_ALLOW_MODESET)
DRM_MODE_ATOMIC_ALLOW_MODESET |\
DRM_MODE_ATOMIC_HW_DONE_EVENT)
struct drm_mode_atomic {
__u32 flags;