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xf86-video-modesetting: Add ms_queue_vblank helper [v3] 

This provides an API wrapper around the kernel interface for queueing
a vblank event, simplifying all of the callers.

v2: Fix missing '|' in computing vbl.request.type

v3: Remove spurious bit of next patch (thanks, Michel Dänzer)

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Keith Packard 2017-09-29 08:48:33 -07:00 committed by Adam Jackson
parent 94f11ca5cf
commit 677c32bcda
5 changed files with 95 additions and 97 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
hw/xfree86/drivers/modesetting/dri2.c
View File

@ -695,19 +695,16 @@ ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
{
ScreenPtr screen = draw->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
ms_dri2_frame_event_ptr wait_info;
drmVBlank vbl;
int ret;
xf86CrtcPtr crtc = ms_dri2_crtc_covering_drawable(draw);
drmmode_crtc_private_ptr drmmode_crtc;
CARD64 current_msc, current_ust, request_msc;
uint32_t seq;
uint64_t queued_msc;
/* Drawable not visible, return immediately */
if (!crtc)
goto out_complete;
drmmode_crtc = crtc->driver_private;
wait_info = calloc(1, sizeof(*wait_info));
if (!wait_info)
@ -747,13 +744,8 @@ ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
if (current_msc >= target_msc)
target_msc = current_msc;
vbl.request.type = (DRM_VBLANK_ABSOLUTE |
DRM_VBLANK_EVENT |
drmmode_crtc->vblank_pipe);
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(crtc, target_msc);
vbl.request.signal = (unsigned long)seq;
ret = drmWaitVBlank(ms->fd, &vbl);
ret = ms_queue_vblank(crtc, MS_QUEUE_ABSOLUTE, target_msc, &queued_msc, seq);
if (ret) {
static int limit = 5;
if (limit) {
@ -766,7 +758,7 @@ ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
goto out_free;
}
wait_info->frame = ms_kernel_msc_to_crtc_msc(crtc, vbl.reply.sequence);
wait_info->frame = queued_msc;
DRI2BlockClient(client, draw);
return TRUE;
}
@ -775,9 +767,6 @@ ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
* If we get here, target_msc has already passed or we don't have one,
* so we queue an event that will satisfy the divisor/remainder equation.
*/
vbl.request.type =
DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT | drmmode_crtc->vblank_pipe;
request_msc = current_msc - (current_msc % divisor) +
remainder;
/*
@ -795,11 +784,7 @@ ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
if (!seq)
goto out_free;
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(crtc, request_msc);
vbl.request.signal = (unsigned long)seq;
ret = drmWaitVBlank(ms->fd, &vbl);
if (ret) {
if (!ms_queue_vblank(crtc, MS_QUEUE_ABSOLUTE, request_msc, &queued_msc, seq)) {
static int limit = 5;
if (limit) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
@ -811,7 +796,8 @@ ms_dri2_schedule_wait_msc(ClientPtr client, DrawablePtr draw, CARD64 target_msc,
goto out_free;
}
wait_info->frame = ms_kernel_msc_to_crtc_msc(crtc, vbl.reply.sequence);
wait_info->frame = queued_msc;
DRI2BlockClient(client, draw);
return TRUE;
@ -839,20 +825,18 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
{
ScreenPtr screen = draw->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
drmVBlank vbl;
int ret, flip = 0;
xf86CrtcPtr crtc = ms_dri2_crtc_covering_drawable(draw);
drmmode_crtc_private_ptr drmmode_crtc;
ms_dri2_frame_event_ptr frame_info = NULL;
uint64_t current_msc, current_ust;
uint64_t request_msc;
uint32_t seq;
ms_queue_flag ms_flag = MS_QUEUE_ABSOLUTE;
uint64_t queued_msc;
/* Drawable not displayed... just complete the swap */
if (!crtc)
goto blit_fallback;
drmmode_crtc = crtc->driver_private;
frame_info = calloc(1, sizeof(*frame_info));
if (!frame_info)
@ -878,6 +862,8 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
ms_dri2_reference_buffer(back);
ret = ms_get_crtc_ust_msc(crtc, &current_ust, &current_msc);
if (ret != Success)
goto blit_fallback;
/* Flips need to be submitted one frame before */
if (can_flip(scrn, draw, front, back)) {
@ -892,22 +878,19 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
if (*target_msc > 0)
*target_msc -= flip;
/* If non-pageflipping, but blitting/exchanging, we need to use
* DRM_VBLANK_NEXTONMISS to avoid unreliable timestamping later
* on.
*/
if (flip == 0)
ms_flag |= MS_QUEUE_NEXT_ON_MISS;
/*
* If divisor is zero, or current_msc is smaller than target_msc
* we just need to make sure target_msc passes before initiating
* the swap.
*/
if (divisor == 0 || current_msc < *target_msc) {
vbl.request.type = (DRM_VBLANK_ABSOLUTE |
DRM_VBLANK_EVENT |
drmmode_crtc->vblank_pipe);
/* If non-pageflipping, but blitting/exchanging, we need to use
* DRM_VBLANK_NEXTONMISS to avoid unreliable timestamping later
* on.
*/
if (flip == 0)
vbl.request.type |= DRM_VBLANK_NEXTONMISS;
/* If target_msc already reached or passed, set it to
* current_msc to ensure we return a reasonable value back
@ -922,19 +905,14 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
if (!seq)
goto blit_fallback;
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(crtc, *target_msc);
vbl.request.signal = (unsigned long)seq;
ret = drmWaitVBlank(ms->fd, &vbl);
if (ret) {
if (!ms_queue_vblank(crtc, ms_flag, *target_msc, &queued_msc, seq)) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"divisor 0 get vblank counter failed: %s\n",
strerror(errno));
goto blit_fallback;
}
*target_msc = ms_kernel_msc_to_crtc_msc(crtc,
vbl.reply.sequence + flip);
*target_msc = queued_msc + flip;
frame_info->frame = *target_msc;
return TRUE;
@ -945,11 +923,6 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
* and we need to queue an event that will satisfy the divisor/remainder
* equation.
*/
vbl.request.type = (DRM_VBLANK_ABSOLUTE |
DRM_VBLANK_EVENT |
drmmode_crtc->vblank_pipe);
if (flip == 0)
vbl.request.type |= DRM_VBLANK_NEXTONMISS;
request_msc = current_msc - (current_msc % divisor) +
remainder;
@ -966,7 +939,6 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
if (request_msc <= current_msc)
request_msc += divisor;
seq = ms_drm_queue_alloc(crtc, frame_info,
ms_dri2_frame_event_handler,
ms_dri2_frame_event_abort);
@ -974,11 +946,7 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
goto blit_fallback;
/* Account for 1 frame extra pageflip delay if flip > 0 */
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(crtc, request_msc) - flip;
vbl.request.signal = (unsigned long)seq;
ret = drmWaitVBlank(ms->fd, &vbl);
if (ret) {
if (!ms_queue_vblank(crtc, ms_flag, request_msc - flip, &queued_msc, seq)) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"final get vblank counter failed: %s\n",
strerror(errno));
@ -986,7 +954,7 @@ ms_dri2_schedule_swap(ClientPtr client, DrawablePtr draw,
}
/* Adjust returned value for 1 fame pageflip offset of flip > 0 */
*target_msc = ms_kernel_msc_to_crtc_msc(crtc, vbl.reply.sequence + flip);
*target_msc = queued_msc + flip;
frame_info->frame = *target_msc;
return TRUE;

17
hw/xfree86/drivers/modesetting/driver.h
View File

@ -111,6 +111,10 @@ typedef struct _modesettingRec {
Bool dirty_enabled;
uint32_t cursor_width, cursor_height;
Bool has_queue_sequence;
Bool tried_queue_sequence;
} modesettingRec, *modesettingPtr;
#define modesettingPTR(p) ((modesettingPtr)((p)->driverPrivate))
@ -121,6 +125,15 @@ uint32_t ms_drm_queue_alloc(xf86CrtcPtr crtc,
ms_drm_handler_proc handler,
ms_drm_abort_proc abort);
typedef enum ms_queue_flag {
MS_QUEUE_ABSOLUTE = 0,
MS_QUEUE_RELATIVE = 1,
MS_QUEUE_NEXT_ON_MISS = 2
} ms_queue_flag;
Bool ms_queue_vblank(xf86CrtcPtr crtc, ms_queue_flag flags,
uint64_t msc, uint64_t *msc_queued, uint32_t seq);
void ms_drm_abort(ScrnInfoPtr scrn,
Bool (*match)(void *data, void *match_data),
void *match_data);
@ -132,8 +145,8 @@ xf86CrtcPtr ms_dri2_crtc_covering_drawable(DrawablePtr pDraw);
int ms_get_crtc_ust_msc(xf86CrtcPtr crtc, CARD64 *ust, CARD64 *msc);
uint32_t ms_crtc_msc_to_kernel_msc(xf86CrtcPtr crtc, uint64_t expect);
uint64_t ms_kernel_msc_to_crtc_msc(xf86CrtcPtr crtc, uint32_t sequence);
uint64_t ms_crtc_msc_to_kernel_msc(xf86CrtcPtr crtc, uint64_t expect);
uint64_t ms_kernel_msc_to_crtc_msc(xf86CrtcPtr crtc, uint64_t sequence);
Bool ms_dri2_screen_init(ScreenPtr screen);

9
hw/xfree86/drivers/modesetting/drmmode_display.c
View File

@ -279,8 +279,6 @@ drmmode_SharedPixmapPresentOnVBlank(PixmapPtr ppix, xf86CrtcPtr crtc,
{
drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
msPixmapPrivPtr ppriv = msGetPixmapPriv(drmmode, ppix);
drmVBlank vbl;
struct vblank_event_args *event_args;
if (ppix == drmmode_crtc->prime_pixmap)
@ -303,12 +301,7 @@ drmmode_SharedPixmapPresentOnVBlank(PixmapPtr ppix, xf86CrtcPtr crtc,
drmmode_SharedPixmapVBlankEventHandler,
drmmode_SharedPixmapVBlankEventAbort);
vbl.request.type =
DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT | drmmode_crtc->vblank_pipe;
vbl.request.sequence = 1;
vbl.request.signal = (unsigned long) ppriv->flip_seq;
return drmWaitVBlank(drmmode->fd, &vbl) >= 0;
return ms_queue_vblank(crtc, MS_QUEUE_RELATIVE, 1, NULL, ppriv->flip_seq);
}
Bool

23
hw/xfree86/drivers/modesetting/present.c
View File

@ -109,13 +109,7 @@ ms_present_queue_vblank(RRCrtcPtr crtc,
uint64_t msc)
{
xf86CrtcPtr xf86_crtc = crtc->devPrivate;
ScreenPtr screen = crtc->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
drmmode_crtc_private_ptr drmmode_crtc = xf86_crtc->driver_private;
struct ms_present_vblank_event *event;
drmVBlank vbl;
int ret;
uint32_t seq;
event = calloc(sizeof(struct ms_present_vblank_event), 1);
@ -130,22 +124,9 @@ ms_present_queue_vblank(RRCrtcPtr crtc,
return BadAlloc;
}
vbl.request.type =
DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT | drmmode_crtc->vblank_pipe;
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(xf86_crtc, msc);
vbl.request.signal = seq;
for (;;) {
ret = drmWaitVBlank(ms->fd, &vbl);
if (!ret)
break;
/* If we hit EBUSY, then try to flush events. If we can't, then
* this is an error.
*/
if (errno != EBUSY || ms_flush_drm_events(screen) < 0) {
ms_drm_abort_seq(scrn, seq);
if (!ms_queue_vblank(xf86_crtc, MS_QUEUE_ABSOLUTE, msc, NULL, seq))
return BadAlloc;
}
}
DebugPresent(("\t\tmq %lld seq %u msc %llu (hw msc %u)\n",
(long long) event_id, seq, (long long) msc,
vbl.request.sequence));

67
hw/xfree86/drivers/modesetting/vblank.c
View File

@ -173,7 +173,7 @@ ms_dri2_crtc_covering_drawable(DrawablePtr pDraw)
static Bool
ms_get_kernel_ust_msc(xf86CrtcPtr crtc,
uint32_t *msc, uint64_t *ust)
uint64_t *msc, uint64_t *ust)
{
ScreenPtr screen = crtc->randr_crtc->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
@ -198,13 +198,50 @@ ms_get_kernel_ust_msc(xf86CrtcPtr crtc,
}
}
Bool
ms_queue_vblank(xf86CrtcPtr crtc, ms_queue_flag flags,
uint64_t msc, uint64_t *msc_queued, uint32_t seq)
{
ScreenPtr screen = crtc->randr_crtc->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
drmVBlank vbl;
int ret;
for (;;) {
/* Queue an event at the specified sequence */
vbl.request.type = DRM_VBLANK_EVENT | drmmode_crtc->vblank_pipe;
if (flags & MS_QUEUE_RELATIVE)
vbl.request.type |= DRM_VBLANK_RELATIVE;
else
vbl.request.type |= DRM_VBLANK_ABSOLUTE;
if (flags & MS_QUEUE_NEXT_ON_MISS)
vbl.request.type |= DRM_VBLANK_NEXTONMISS;
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(crtc, msc);
vbl.request.signal = seq;
ret = drmWaitVBlank(ms->fd, &vbl);
if (ret == 0) {
if (msc_queued)
*msc_queued = ms_kernel_msc_to_crtc_msc(crtc, vbl.reply.sequence);
return TRUE;
}
if (errno != EBUSY) {
ms_drm_abort_seq(scrn, msc);
return FALSE;
}
ms_flush_drm_events(screen);
}
}
/**
* Convert a 32-bit kernel MSC sequence number to a 64-bit local sequence
* number, adding in the vblank_offset and high 32 bits, and dealing
* with 64-bit wrapping
*/
uint64_t
ms_kernel_msc_to_crtc_msc(xf86CrtcPtr crtc, uint32_t sequence)
ms_kernel_msc_to_crtc_msc(xf86CrtcPtr crtc, uint64_t sequence)
{
drmmode_crtc_private_rec *drmmode_crtc = crtc->driver_private;
sequence += drmmode_crtc->vblank_offset;
@ -218,7 +255,7 @@ ms_kernel_msc_to_crtc_msc(xf86CrtcPtr crtc, uint32_t sequence)
int
ms_get_crtc_ust_msc(xf86CrtcPtr crtc, CARD64 *ust, CARD64 *msc)
{
uint32_t kernel_msc;
uint64_t kernel_msc;
if (!ms_get_kernel_ust_msc(crtc, &kernel_msc, ust))
return BadMatch;
@ -230,13 +267,13 @@ ms_get_crtc_ust_msc(xf86CrtcPtr crtc, CARD64 *ust, CARD64 *msc)
#define MAX_VBLANK_OFFSET 1000
/**
* Convert a 64-bit adjusted MSC value into a 32-bit kernel sequence number,
* removing the high 32 bits and subtracting out the vblank_offset term.
* Convert a 64-bit adjusted MSC value into a 64-bit kernel sequence number,
* by subtracting out the vblank_offset term.
*
* This also updates the vblank_offset when it notices that the value should
* change.
*/
uint32_t
uint64_t
ms_crtc_msc_to_kernel_msc(xf86CrtcPtr crtc, uint64_t expect)
{
drmmode_crtc_private_rec *drmmode_crtc = crtc->driver_private;
@ -257,7 +294,7 @@ ms_crtc_msc_to_kernel_msc(xf86CrtcPtr crtc, uint64_t expect)
drmmode_crtc->vblank_offset = 0;
}
}
return (uint32_t) (expect - drmmode_crtc->vblank_offset);
return (expect - drmmode_crtc->vblank_offset);
}
/**
@ -375,25 +412,31 @@ ms_drm_abort(ScrnInfoPtr scrn, Bool (*match)(void *data, void *match_data),
* drm event queue and calls the handler for it.
*/
static void
ms_drm_handler(int fd, uint32_t frame, uint32_t sec, uint32_t usec,
void *user_ptr)
ms_drm_sequence_handler(int fd, uint64_t frame, uint64_t ns, uint64_t user_data)
{
struct ms_drm_queue *q, *tmp;
uint32_t user_data = (uint32_t) (intptr_t) user_ptr;
uint32_t seq = (uint32_t) user_data;
xorg_list_for_each_entry_safe(q, tmp, &ms_drm_queue, list) {
if (q->seq == user_data) {
if (q->seq == seq) {
uint64_t msc;
msc = ms_kernel_msc_to_crtc_msc(q->crtc, frame);
xorg_list_del(&q->list);
q->handler(msc, (uint64_t) sec * 1000000 + usec, q->data);
q->handler(msc, ns / 1000, q->data);
free(q);
break;
}
}
}
static void
ms_drm_handler(int fd, uint32_t frame, uint32_t sec, uint32_t usec,
void *user_ptr)
{
ms_drm_sequence_handler(fd, frame, ((uint64_t) sec * 1000000 + usec) * 1000, (uint32_t) (uintptr_t) user_ptr);
}
Bool
ms_vblank_screen_init(ScreenPtr screen)
{