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xf86-video-modesetting: Support new vblank kernel API [v2]

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drmCrtcGetSequence returns the current vblank sequence and time.

drmCrtcQueueSequence queues an event for delivery at a specified
vblank sequence.

Use these (when available) in preference to drmWaitVBlank.

v2: Remove FIRST_PIXEL_OUT_FLAG. This has been removed from the kernel
    API.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard 2017-12-21 18:54:33 -08:00 committed by Adam Jackson
parent 627dfc2f83
commit 44d5f2eb8a
1 changed files with 49 additions and 1 deletions
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50
hw/xfree86/drivers/modesetting/vblank.c
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@ -182,6 +182,21 @@ ms_get_kernel_ust_msc(xf86CrtcPtr crtc,
drmVBlank vbl;
int ret;
#ifdef DRM_IOCTL_CRTC_QUEUE_SEQUENCE
if (ms->has_queue_sequence || !ms->tried_queue_sequence) {
uint64_t ns;
ms->tried_queue_sequence = TRUE;
ret = drmCrtcGetSequence(ms->fd, drmmode_crtc->mode_crtc->crtc_id,
msc, &ns);
if (ret != -1 || errno != ENOTTY) {
ms->has_queue_sequence = TRUE;
if (ret == 0)
*ust = ns / 1000;
return ret == 0;
}
}
#endif
/* Get current count */
vbl.request.type = DRM_VBLANK_RELATIVE | drmmode_crtc->vblank_pipe;
vbl.request.sequence = 0;
@ -211,6 +226,35 @@ ms_queue_vblank(xf86CrtcPtr crtc, ms_queue_flag flags,
for (;;) {
/* Queue an event at the specified sequence */
#ifdef DRM_IOCTL_CRTC_QUEUE_SEQUENCE
if (ms->has_queue_sequence || !ms->tried_queue_sequence) {
uint32_t drm_flags = 0;
uint64_t kernel;
uint64_t kernel_queued;
ms->tried_queue_sequence = TRUE;
if (flags & MS_QUEUE_RELATIVE)
drm_flags |= DRM_CRTC_SEQUENCE_RELATIVE;
if (flags & MS_QUEUE_NEXT_ON_MISS)
drm_flags |= DRM_CRTC_SEQUENCE_NEXT_ON_MISS;
kernel = ms_crtc_msc_to_kernel_msc(crtc, msc);
ret = drmCrtcQueueSequence(ms->fd, drmmode_crtc->mode_crtc->crtc_id,
drm_flags,
kernel, &kernel_queued, seq);
if (ret == 0) {
if (msc_queued)
*msc_queued = ms_kernel_msc_to_crtc_msc(crtc, kernel_queued);
return TRUE;
}
if (ret != -1 || errno != ENOTTY) {
ms->has_queue_sequence = TRUE;
goto check;
}
}
#endif
vbl.request.type = DRM_VBLANK_EVENT | drmmode_crtc->vblank_pipe;
if (flags & MS_QUEUE_RELATIVE)
vbl.request.type |= DRM_VBLANK_RELATIVE;
@ -228,6 +272,9 @@ ms_queue_vblank(xf86CrtcPtr crtc, ms_queue_flag flags,
*msc_queued = ms_kernel_msc_to_crtc_msc(crtc, vbl.reply.sequence);
return TRUE;
}
#ifdef DRM_IOCTL_CRTC_QUEUE_SEQUENCE
check:
#endif
if (errno != EBUSY) {
ms_drm_abort_seq(scrn, seq);
return FALSE;
@ -446,9 +493,10 @@ ms_vblank_screen_init(ScreenPtr screen)
modesettingEntPtr ms_ent = ms_ent_priv(scrn);
xorg_list_init(&ms_drm_queue);
ms->event_context.version = 2;
ms->event_context.version = 4;
ms->event_context.vblank_handler = ms_drm_handler;
ms->event_context.page_flip_handler = ms_drm_handler;
ms->event_context.sequence_handler = ms_drm_sequence_handler;
/* We need to re-register the DRM fd for the synchronisation
* feedback on every server generation, so perform the