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igt/kms_vblank: Simple accuracy test

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Queue 60 event to arrive at the same vblank from different points in
time and make sure it just works.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-04-06 10:37:41 +01:00
parent 43a1f64e72
commit a6c3b32622
1 changed files with 43 additions and 6 deletions
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49
tests/kms_vblank.c
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@ -67,6 +67,40 @@ static bool crtc0_active(int fd)
return drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl) == 0; return drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl) == 0;
} }
static void accuracy(int fd)
{
union drm_wait_vblank vbl;
unsigned long target;
int n;
memset(&vbl, 0, sizeof(vbl));
vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 1;
do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
target = vbl.reply.sequence + 60;
for (n = 0; n < 60; n++) {
vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 1;
do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
vbl.request.type = DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT;
vbl.request.sequence = target;
do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
}
vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 0;
do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
igt_assert_eq(vbl.reply.sequence, target);
for (n = 0; n < 60; n++) {
struct drm_event_vblank ev;
igt_assert_eq(read(fd, &ev, sizeof(ev)), sizeof(ev));
igt_assert_eq(ev.sequence, target);
}
}
static void vblank_query(int fd, bool busy) static void vblank_query(int fd, bool busy)
{ {
union drm_wait_vblank vbl; union drm_wait_vblank vbl;
@ -79,12 +113,12 @@ static void vblank_query(int fd, bool busy)
if (busy) { if (busy) {
vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT; vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
vbl.request.sequence = 72; vbl.request.sequence = 72;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl)); do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
} }
vbl.request.type = DRM_VBLANK_RELATIVE; vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 0; vbl.request.sequence = 0;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl)); do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
sq = vbl.reply.sequence; sq = vbl.reply.sequence;
@ -92,7 +126,7 @@ static void vblank_query(int fd, bool busy)
do { do {
vbl.request.type = DRM_VBLANK_RELATIVE; vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 0; vbl.request.sequence = 0;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl)); do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
count++; count++;
} while ((vbl.reply.sequence - sq) <= 60); } while ((vbl.reply.sequence - sq) <= 60);
clock_gettime(CLOCK_MONOTONIC, &end); clock_gettime(CLOCK_MONOTONIC, &end);
@ -116,12 +150,12 @@ static void vblank_wait(int fd, bool busy)
if (busy) { if (busy) {
vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT; vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
vbl.request.sequence = 72; vbl.request.sequence = 72;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl)); do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
} }
vbl.request.type = DRM_VBLANK_RELATIVE; vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 0; vbl.request.sequence = 0;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl)); do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
sq = vbl.reply.sequence; sq = vbl.reply.sequence;
@ -129,7 +163,7 @@ static void vblank_wait(int fd, bool busy)
do { do {
vbl.request.type = DRM_VBLANK_RELATIVE; vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 1; vbl.request.sequence = 1;
do_or_die(drmIoctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl)); do_ioctl(fd, DRM_IOCTL_WAIT_VBLANK, &vbl);
count++; count++;
} while ((vbl.reply.sequence - sq) <= 60); } while ((vbl.reply.sequence - sq) <= 60);
clock_gettime(CLOCK_MONOTONIC, &end); clock_gettime(CLOCK_MONOTONIC, &end);
@ -154,6 +188,9 @@ igt_main
igt_require(crtc0_active(fd)); igt_require(crtc0_active(fd));
} }
igt_subtest("accuracy")
accuracy(fd);
igt_subtest("query-idle") igt_subtest("query-idle")
vblank_query(fd, false); vblank_query(fd, false);