andreacavalli/xserver-multidpi
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present: Queue flips for later execution

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When a flip (or unflip) is pending and a flip request comes in, leave
it queued until the pending flip completes and then execute it.

This fixes a bug where an application submitting back-to-back
present_pixmap requests for sequential frames would alternate between
flipping and copying as the pending flip would cause the new
present_pixmap request to not use a flip.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Frank Binns <frank.binns@imgtec.com>
This commit is contained in:
Keith Packard 2014-01-27 11:23:58 -08:00
parent 2f5cf9ff9a
commit e6f5d9d7b7
2 changed files with 89 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

126
present/present.c
View File

@ -42,6 +42,9 @@ static struct xorg_list present_flip_queue;
#define DebugPresent(x)
#endif
static void
present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc);
/*
* Copies the update region from a pixmap to the target drawable
*/
@ -78,6 +81,20 @@ present_copy_region(DrawablePtr drawable,
FreeScratchGC(gc);
}
static inline PixmapPtr
present_flip_pending_pixmap(ScreenPtr screen)
{
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (!screen_priv)
return NULL;
if (!screen_priv->flip_pending)
return NULL;
return screen_priv->flip_pending->pixmap;
}
static Bool
present_check_flip(RRCrtcPtr crtc,
WindowPtr window,
@ -88,6 +105,7 @@ present_check_flip(RRCrtcPtr crtc,
int16_t y_off)
{
ScreenPtr screen = window->drawable.pScreen;
PixmapPtr window_pixmap;
WindowPtr root = screen->root;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
@ -104,19 +122,11 @@ present_check_flip(RRCrtcPtr crtc,
if (!screen_priv->info->flip)
return FALSE;
/* Can't pend a flip while unflipping */
if (screen_priv->unflip_event_id) {
return FALSE;
}
/* Can't have two pending flips at the same time */
if (screen_priv->flip_pending) {
return FALSE;
}
/* Make sure the window hasn't been redirected with Composite */
if (screen->GetWindowPixmap(window) != screen->GetScreenPixmap(screen) &&
screen->GetWindowPixmap(window) != screen_priv->flip_pixmap)
window_pixmap = screen->GetWindowPixmap(window);
if (window_pixmap != screen->GetScreenPixmap(screen) &&
window_pixmap != screen_priv->flip_pixmap &&
window_pixmap != present_flip_pending_pixmap(screen))
return FALSE;
/* Check for full-screen window */
@ -147,6 +157,7 @@ present_check_flip(RRCrtcPtr crtc,
/* Ask the driver for permission */
if (screen_priv->info->check_flip) {
if (!(*screen_priv->info->check_flip) (crtc, window, pixmap, sync_flip)) {
DebugPresent(("\td %08lx -> %08lx\n", window->drawable.id, pixmap ? pixmap->drawable.id : 0));
return FALSE;
}
}
@ -188,8 +199,10 @@ present_pixmap_idle(PixmapPtr pixmap, WindowPtr window, CARD32 serial, struct pr
{
if (present_fence)
present_fence_set_triggered(present_fence);
if (window)
if (window) {
DebugPresent(("\ti %08lx\n", pixmap ? pixmap->drawable.id : 0));
present_send_idle_notify(window, serial, pixmap, present_fence);
}
}
RRCrtcPtr
@ -227,9 +240,8 @@ present_query_capabilities(RRCrtcPtr crtc)
}
static int
present_get_ust_msc(WindowPtr window, RRCrtcPtr crtc, uint64_t *ust, uint64_t *msc)
present_get_ust_msc(ScreenPtr screen, RRCrtcPtr crtc, uint64_t *ust, uint64_t *msc)
{
ScreenPtr screen = window->drawable.pScreen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
if (crtc == NULL)
@ -283,7 +295,7 @@ present_window_to_crtc_msc(WindowPtr window, RRCrtcPtr crtc, uint64_t window_msc
* we'll just use whatever previous MSC we'd seen from this CRTC
*/
if (present_get_ust_msc(window, window_priv->crtc, &old_ust, &old_msc) != Success)
if (present_get_ust_msc(window->drawable.pScreen, window_priv->crtc, &old_ust, &old_msc) != Success)
old_msc = window_priv->msc;
window_priv->msc_offset += new_msc - old_msc;
@ -293,6 +305,34 @@ present_window_to_crtc_msc(WindowPtr window, RRCrtcPtr crtc, uint64_t window_msc
return window_msc + window_priv->msc_offset;
}
/*
* When the wait fence or previous flip is completed, it's time
* to re-try the request
*/
static void
present_re_execute(present_vblank_ptr vblank)
{
uint64_t ust = 0, crtc_msc = 0;
if (vblank->crtc)
(void) present_get_ust_msc(vblank->screen, vblank->crtc, &ust, &crtc_msc);
present_execute(vblank, ust, crtc_msc);
}
static void
present_flip_try_ready(ScreenPtr screen)
{
present_vblank_ptr vblank, tmp;
xorg_list_for_each_entry_safe(vblank, tmp, &present_exec_queue, event_queue) {
if (vblank->flip_ready) {
present_re_execute(vblank);
return;
}
}
}
static void
present_flip_idle(ScreenPtr screen)
{
@ -368,17 +408,15 @@ present_unflip(ScreenPtr screen)
(*screen_priv->info->unflip) (screen, screen_priv->unflip_event_id);
}
static void
present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc);
static void
present_flip_notify(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc)
{
ScreenPtr screen = vblank->screen;
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
DebugPresent(("\tn %p %8lld: %08lx -> %08lx\n", vblank, vblank->target_msc,
vblank->pixmap ? vblank->pixmap->drawable.id : 0,
DebugPresent(("\tn %lld %p %8lld: %08lx -> %08lx\n",
vblank->event_id, vblank, vblank->target_msc,
vblank->pixmap ? vblank->pixmap->drawable.id : 0,
vblank->window->drawable.id));
assert (vblank == screen_priv->flip_pending);
@ -404,6 +442,8 @@ present_flip_notify(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc)
present_vblank_notify(vblank, PresentCompleteKindPixmap, PresentCompleteModeFlip, ust, crtc_msc);
present_vblank_destroy(vblank);
present_flip_try_ready(screen);
}
void
@ -436,6 +476,7 @@ present_event_notify(uint64_t event_id, uint64_t ust, uint64_t msc)
DebugPresent(("\tun %lld\n", event_id));
screen_priv->unflip_event_id = 0;
present_flip_idle(screen);
present_flip_try_ready(screen);
return;
}
}
@ -498,15 +539,7 @@ static void
present_wait_fence_triggered(void *param)
{
present_vblank_ptr vblank = param;
WindowPtr window = vblank->window;
uint64_t ust = 0, crtc_msc = 0;
if (window) {
present_window_priv_ptr window_priv = present_get_window_priv(window, TRUE);
if (window_priv)
(void) present_get_ust_msc(window, window_priv->crtc, &ust, &crtc_msc);
}
present_execute(vblank, ust, crtc_msc);
present_re_execute(vblank);
}
/*
@ -534,14 +567,27 @@ present_execute(present_vblank_ptr vblank, uint64_t ust, uint64_t crtc_msc)
}
}
if (vblank->flip && vblank->pixmap && vblank->window) {
if (screen_priv->flip_pending || screen_priv->unflip_event_id) {
DebugPresent(("\tr %lld %p (pending %p unflip %lld)\n",
vblank->event_id, vblank,
screen_priv->flip_pending, screen_priv->unflip_event_id));
vblank->flip_ready = TRUE;
return;
}
}
xorg_list_del(&vblank->event_queue);
vblank->queued = FALSE;
if (vblank->pixmap && vblank->window) {
if (vblank->flip && screen_priv->flip_pending == NULL && !screen_priv->unflip_event_id) {
if (vblank->flip) {
DebugPresent(("\tf %lld %p %8lld: %08lx -> %08lx\n",
vblank->event_id, vblank, crtc_msc,
vblank->pixmap->drawable.id, vblank->window->drawable.id));
DebugPresent(("\tf %p %8lld: %08lx -> %08lx\n", vblank, crtc_msc, vblank->pixmap->drawable.id, vblank->window->drawable.id));
/* Prepare to flip by placing it in the flip queue and
* and sticking it into the flip_pending field
*/
@ -644,7 +690,7 @@ present_pixmap(WindowPtr window,
uint64_t target_msc;
uint64_t crtc_msc;
int ret;
present_vblank_ptr vblank;
present_vblank_ptr vblank, tmp;
ScreenPtr screen = window->drawable.pScreen;
present_window_priv_ptr window_priv = present_get_window_priv(window, TRUE);
present_screen_priv_ptr screen_priv = present_screen_priv(screen);
@ -664,7 +710,7 @@ present_pixmap(WindowPtr window,
target_crtc = present_get_crtc(window);
}
present_get_ust_msc(window, target_crtc, &ust, &crtc_msc);
present_get_ust_msc(screen, target_crtc, &ust, &crtc_msc);
target_msc = present_window_to_crtc_msc(window, target_crtc, window_msc, crtc_msc);
@ -698,7 +744,7 @@ present_pixmap(WindowPtr window,
*/
if (!update) {
xorg_list_for_each_entry(vblank, &window_priv->vblank, window_list) {
xorg_list_for_each_entry_safe(vblank, tmp, &window_priv->vblank, window_list) {
if (!vblank->pixmap)
continue;
@ -706,11 +752,11 @@ present_pixmap(WindowPtr window,
if (!vblank->queued)
continue;
if (vblank->crtc != target_crtc || vblank->target_msc != target_msc)
if (vblank->crtc != target_crtc || vblank->target_msc > target_msc)
continue;
DebugPresent(("\tx %lld %p %8lld: %08lx -> %08lx (crtc %p)\n",
vblank->event_id, vblank, target_msc,
vblank->event_id, vblank, vblank->target_msc,
vblank->pixmap->drawable.id, vblank->window->drawable.id,
vblank->crtc));
@ -720,6 +766,9 @@ present_pixmap(WindowPtr window,
vblank->pixmap = NULL;
vblank->idle_fence = NULL;
vblank->flip = FALSE;
if (vblank->flip_ready)
present_re_execute(vblank);
}
}
@ -875,7 +924,8 @@ present_vblank_destroy(present_vblank_ptr vblank)
/* Remove vblank from window and screen lists */
xorg_list_del(&vblank->window_list);
DebugPresent(("\td %p %8lld: %08lx -> %08lx\n", vblank, vblank->target_msc,
DebugPresent(("\td %lld %p %8lld: %08lx -> %08lx\n",
vblank->event_id, vblank, vblank->target_msc,
vblank->pixmap ? vblank->pixmap->drawable.id : 0,
vblank->window->drawable.id));

1
present/present_priv.h
View File

@ -71,6 +71,7 @@ struct present_vblank {
int num_notifies;
Bool queued; /* on present_exec_queue */
Bool flip; /* planning on using flip */
Bool flip_ready; /* wants to flip, but waiting for previous flip or unflip */
Bool sync_flip; /* do flip synchronous to vblank */
Bool abort_flip; /* aborting this flip */
};