diff options
| -rw-r--r-- | tests/kms_setmode.c | 75 |
1 files changed, 73 insertions, 2 deletions
diff --git a/tests/kms_setmode.c b/tests/kms_setmode.c index 64e21cd1..9dafca00 100644 --- a/tests/kms_setmode.c +++ b/tests/kms_setmode.c @@ -71,6 +71,7 @@ enum test_flags { TEST_SINGLE_CRTC_CLONE = 0x04, TEST_EXCLUSIVE_CRTC_CLONE = 0x08, TEST_STEALING = 0x10, + TEST_TIMINGS = 0x20, }; struct test_config { @@ -411,6 +412,75 @@ static int test_stealing(int fd, struct crtc_config *crtc, uint32_t *ids) return ret; } +static double frame_time(const drmModeModeInfo *kmode) +{ + return 1000.0 * kmode->htotal * kmode->vtotal / kmode->clock; +} + +static void check_timings(int crtc_idx, const drmModeModeInfo *kmode) +{ +#define CALIBRATE_TS_STEPS 120 /* ~2s has to be less than 128! */ + drmVBlank wait; + igt_stats_t stats; + uint32_t last_seq; + uint64_t last_timestamp; + double expected; + double mean; + double stddev; + int n; + + memset(&wait, 0, sizeof(wait)); + wait.request.type = kmstest_get_vbl_flag(crtc_idx); + wait.request.type |= DRM_VBLANK_ABSOLUTE | DRM_VBLANK_NEXTONMISS; + do_or_die(drmWaitVBlank(drm_fd, &wait)); + + last_seq = wait.reply.sequence; + last_timestamp = wait.reply.tval_sec; + last_timestamp *= 1000000; + last_timestamp += wait.reply.tval_usec; + + memset(&wait, 0, sizeof(wait)); + wait.request.type = kmstest_get_vbl_flag(crtc_idx); + wait.request.type |= DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT; + wait.request.sequence = last_seq; + for (n = 0; n < CALIBRATE_TS_STEPS; n++) { + ++wait.request.sequence; + do_or_die(drmWaitVBlank(drm_fd, &wait)); + } + + igt_stats_init_with_size(&stats, CALIBRATE_TS_STEPS); + for (n = 0; n < CALIBRATE_TS_STEPS; n++) { + struct drm_event_vblank ev; + uint64_t now; + + igt_assert(read(drm_fd, &ev, sizeof(ev)) == sizeof(ev)); + igt_assert_eq(ev.sequence, last_seq + 1); + + now = ev.tv_sec; + now *= 1000000; + now += ev.tv_usec; + + igt_stats_push(&stats, now - last_timestamp); + + last_timestamp = now; + last_seq = ev.sequence; + } + + expected = frame_time(kmode); + + mean = igt_stats_get_mean(&stats); + stddev = igt_stats_get_std_deviation(&stats); + + igt_info("Expected frametime: %.0fus; measured %.1fus +- %.3fus accuracy %.2f%%\n", + expected, mean, stddev, 100 * 6 * stddev / mean); + igt_assert(6 * stddev / mean < 0.005); /* 99% accuracy within 0.5% */ + + igt_assert_f(fabs(mean - expected) < 2*stddev, + "vblank interval differs from modeline! expected %.1fus, measured %1.fus +- %.3fus, difference %.1fus (%.1f sigma)\n", + expected, mean, stddev, + fabs(mean - expected), fabs(mean - expected) / stddev); +} + static void test_crtc_config(const struct test_config *tconf, struct crtc_config *crtcs, int crtc_count) { @@ -473,8 +543,8 @@ static void test_crtc_config(const struct test_config *tconf, igt_assert(config_failed == !!(tconf->flags & TEST_INVALID)); - if (ret == 0 && connector_connected && !(tconf->flags & TEST_INVALID)) - sleep(5); + if (ret == 0 && connector_connected && tconf->flags & TEST_TIMINGS) + check_timings(crtcs[0].crtc_idx, &crtcs[0].mode); for (i = 0; i < crtc_count; i++) { if (crtcs[i].fb_info.fb_id) { @@ -730,6 +800,7 @@ int main(int argc, char **argv) enum test_flags flags; const char *name; } tests[] = { + { TEST_TIMINGS, "basic" }, { TEST_CLONE | TEST_SINGLE_CRTC_CLONE, "basic-clone-single-crtc" }, { TEST_INVALID | TEST_CLONE | TEST_SINGLE_CRTC_CLONE, |