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vo_drm: add vertical sync

This commit is contained in:
Marcin Kurczewski 2015-04-20 18:57:24 +02:00 committed by wm4
parent 4ae8fc326d
commit a7cf35c1ca
1 changed files with 45 additions and 5 deletions
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50
video/out/vo_drm.c
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@ -24,6 +24,7 @@
#include <fcntl.h>
#include <stdbool.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <unistd.h>
#include <libswscale/swscale.h>
@ -63,14 +64,17 @@ struct modeset_dev {
};
struct priv {
char *device_path;
int connector_id;
int fd;
struct vt_switcher vt_switcher;
struct modeset_dev *dev;
drmModeCrtc *old_crtc;
drmEventContext ev;
bool active;
char *device_path;
int connector_id;
bool pflip_happening;
int32_t device_w;
int32_t device_h;
@ -334,6 +338,13 @@ end:
return ret;
}
static void modeset_page_flipped(int fd, unsigned int frame, unsigned int sec,
unsigned int usec, void *data)
{
struct priv *p = data;
p->pflip_happening = false;
}
static int setup_vo_crtc(struct vo *vo)
@ -350,7 +361,18 @@ static int setup_vo_crtc(struct vo *vo)
static void release_vo_crtc(struct vo *vo)
{
struct priv *p = vo->priv;
p->active = false;
// wait for current page flip
while (p->pflip_happening) {
int ret = drmHandleEvent(p->fd, &p->ev);
if (ret) {
MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
break;
}
}
if (p->old_crtc) {
drmModeSetCrtc(p->fd,
p->old_crtc->crtc_id,
@ -487,15 +509,31 @@ static void flip_page(struct vo *vo)
{
struct priv *p = vo->priv;
if (!p->active) return;
if (p->pflip_happening) return;
int ret = drmModeSetCrtc(p->fd, p->dev->crtc,
p->dev->bufs[p->dev->front_buf].fb,
0, 0, &p->dev->conn, 1, &p->dev->mode);
int ret = drmModePageFlip(p->fd, p->dev->crtc,
p->dev->bufs[p->dev->front_buf].fb,
DRM_MODE_PAGE_FLIP_EVENT, p);
if (ret) {
MP_WARN(vo, "Cannot flip page for connector\n");
} else {
p->dev->front_buf++;
p->dev->front_buf %= BUF_COUNT;
p->pflip_happening = true;
}
// poll page flip finish event
const int timeout_ms = 3000;
struct pollfd fds[1] = {
{ .events = POLLIN, .fd = p->fd },
};
poll(fds, 1, timeout_ms);
if (fds[0].revents & POLLIN) {
ret = drmHandleEvent(p->fd, &p->ev);
if (ret != 0) {
MP_ERR(vo, "drmHandleEvent failed: %i\n", ret);
return;
}
}
}
@ -523,6 +561,8 @@ static int preinit(struct vo *vo)
struct priv *p = vo->priv;
p->sws = mp_sws_alloc(vo);
p->fd = -1;
p->ev.version = DRM_EVENT_CONTEXT_VERSION;
p->ev.page_flip_handler = modeset_page_flipped;
if (vt_switcher_init(&p->vt_switcher, vo->log))
goto err;