59 	return ts->tv_sec * NSECS_PER_SEC + ts->tv_nsec;  in timespec_to_ns()
71 	igt_assert_eq(read(data->drm_fd, &ev, sizeof(ev)), sizeof(ev));  in get_vblank_event_ns()
80  * CLOCK_MONOTONIC_RAW - which isn't what the kernel uses for its timestamps.
92 	igt_fail(-errno);  in get_time_ns()
97 /* Returns the rate duration in nanoseconds for the given refresh rate. */
111 	fd = igt_debugfs_connector_dir(data->drm_fd, output->name, O_RDONLY);  in get_vrr_range()
141 	igt_require(mode->vrefresh > range.min);  in get_test_rate_ns()
143 	vtest = (mode->vrefresh - range.min) / 2 + range.min;  in get_test_rate_ns()
144 	igt_require(vtest < mode->vrefresh);  in get_test_rate_ns()
156 /* Toggles variable refresh rate on the pipe. */
159 	igt_pipe_set_prop_value(&data->display, pipe, IGT_CRTC_VRR_ENABLED,  in set_vrr_on_pipe()
161 	igt_display_commit_atomic(&data->display, 0, NULL);  in set_vrr_on_pipe()
172 	igt_display_reset(&data->display);  in prepare_test()
176 	igt_create_color_fb(data->drm_fd, mode.hdisplay, mode.vdisplay,  in prepare_test()
178 			    0.50, 0.50, 0.50, &data->fb0);  in prepare_test()
180 	igt_create_color_fb(data->drm_fd, mode.hdisplay, mode.vdisplay,  in prepare_test()
182 			    0.50, 0.50, 0.50, &data->fb1);  in prepare_test()
184 	cr = igt_get_cairo_ctx(data->drm_fd, &data->fb0);  in prepare_test()
189 	igt_put_cairo_ctx(data->drm_fd, &data->fb0, cr);  in prepare_test()
193 	igt_plane_set_fb(primary, &data->fb0);  in prepare_test()
195 	igt_display_commit_atomic(&data->display,  in prepare_test()
208 	drmWaitVBlank(data->drm_fd, &vbl);  in wait_for_vblank()
213 /* Performs an asynchronous non-blocking page-flip on a pipe. */
217 	igt_pipe_t *pipe = &data->display.pipes[pipe_id];  in do_flip()
224 	 * It's also non-blocking, but returns -EBUSY if flipping too fast.  in do_flip()
225 	 * 2x monitor tests will need async flips in the atomic API.  in do_flip()
228 		ret = drmModePageFlip(data->drm_fd, pipe->crtc_id,  in do_flip()
229 				      fb->fb_id,  in do_flip()
233 	} while (ret == -EBUSY);  in do_flip()
242  * Flips at the given rate and measures against the expected value.
243  * Returns the pass rate as a percentage from 0 - 100.
245  * The VRR API is quite flexible in terms of definition - the driver
248  * to prevent stuttering or to match a source content rate.
250  * The only way to "present" at a fixed rate like userspace in a vendor
253  * desired rate.
272 		do_flip(data, pipe, front ? &data->fb1 : &data->fb0);  in flip_and_measure()
275 		diff_ns = rate_ns - (vblank_ns - last_vblank_ns);  in flip_and_measure()
281 		 * Check if the difference between the two flip timestamps  in flip_and_measure()
282 		 * was within the required threshold from the expected rate.  in flip_and_measure()
292 		if (now_ns - start_ns > duration_ns)  in flip_and_measure()
300 		diff_ns = now_ns - start_ns;  in flip_and_measure()
301 		wait_ns = ((diff_ns + rate_ns - 1) / rate_ns) * rate_ns;  in flip_and_measure()
302 		target_ns = start_ns + wait_ns - 10;  in flip_and_measure()
313 /* Basic VRR flip functionality test - enable, measure, disable, measure */
317 	uint64_t rate;  in test_basic()  local
320 	rate = get_test_rate_ns(data, output);  in test_basic()
327 	 * Do a short run with VRR, but don't check the result.  in test_basic()
331 	flip_and_measure(data, output, pipe, rate, 250000000ull);  in test_basic()
334 		kmstest_set_connector_dpms(output->display->drm_fd,  in test_basic()
335 					   output->config.connector,  in test_basic()
337 		kmstest_set_connector_dpms(output->display->drm_fd,  in test_basic()
338 					   output->config.connector,  in test_basic()
346 	result = flip_and_measure(data, output, pipe, rate, TEST_DURATION_NS);  in test_basic()
350 	/* This check is delayed until after VRR is disabled so it isn't  in test_basic()
356 	result = flip_and_measure(data, output, pipe, rate, TEST_DURATION_NS);  in test_basic()
362 	igt_remove_fb(data->drm_fd, &data->fb1);  in test_basic()
363 	igt_remove_fb(data->drm_fd, &data->fb0);  in test_basic()
373 	for_each_connected_output(&data->display, output) {  in run_vrr_test()
379 		for_each_pipe(&data->display, pipe)  in run_vrr_test()
407 	igt_subtest("flip-basic")
410 	igt_subtest("flip-dpms")
413 	igt_subtest("flip-suspend")