[Intel-gfx] [PATCH i-g-t v2] tests/kms_atomic: test that TEST_ONLY does not clobber state

[Maarten Lankhorst]

Op 09-03-17 om 10:19 schreef Mika Kahola:
> We need to make sure that TEST_ONLY really only touches the free-standing
> state objects and nothing else. Test approach here is the following:
>
> - Create a config and submit it with TEST_ONLY.
> - do dpms off/on cycle with the current config to reconfigure hw
> - read back all legacy state to make sure none of that is clobbered
>
> v2: use ATOMIC_RELAX_NONE instead of CRTC_RELAX_MODE when checking crtc or
>     plane state (Maarten)
>     rename subtest and function that executes this test (Maarten)
>
> Signed-off-by: Mika Kahola <mika.kahola at intel.com>
> ---
>  tests/kms_atomic.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 82 insertions(+)
>
> diff --git a/tests/kms_atomic.c b/tests/kms_atomic.c
> index d6273f4..6375fed 100644
> --- a/tests/kms_atomic.c
> +++ b/tests/kms_atomic.c
> @@ -831,6 +831,25 @@ static uint32_t plane_get_igt_format(struct kms_atomic_plane_state *plane)
>  	return ret;
>  }
>  
> +static void
> +set_dpms(int fd, int mode)
> +{
> +	int i;
> +	drmModeConnector *connector;
> +	uint32_t id;
> +	drmModeRes *resources = drmModeGetResources(fd);
> +
> +	for (i = 0; i < resources->count_connectors; i++) {
> +		id = resources->connectors[i];
> +
> +		connector = drmModeGetConnectorCurrent(fd, id);
> +
> +		kmstest_set_connector_dpms(fd, connector, mode);
> +
> +		drmModeFreeConnector(connector);
> +	}
> +}
> +
>  static void plane_overlay(struct kms_atomic_crtc_state *crtc,
>  			  struct kms_atomic_plane_state *plane_old)
>  {
> @@ -930,6 +949,57 @@ static void plane_primary(struct kms_atomic_crtc_state *crtc,
>  	drmModeAtomicFree(req);
>  }
>  
> +/* test to ensure that DRM_MODE_ATOMIC_TEST_ONLY really only touches the
> + * free-standing state objects and nothing else.
> + */
> +static void test_only(struct kms_atomic_crtc_state *crtc,
> +		      struct kms_atomic_plane_state *plane_old)
> +{
> +	struct drm_mode_modeinfo *mode = crtc->mode.data;
> +	struct kms_atomic_plane_state plane = *plane_old;
> +	uint32_t format = plane_get_igt_format(&plane);
> +	drmModeAtomicReq *req = drmModeAtomicAlloc();
> +	struct igt_fb fb;
> +	int ret;
> +
> +	igt_require(format != 0);
> +
> +	plane.src_x = 0;
> +	plane.src_y = 0;
> +	plane.src_w = mode->hdisplay << 16;
> +	plane.src_h = mode->vdisplay << 16;
> +	plane.crtc_x = 0;
> +	plane.crtc_y = 0;
> +	plane.crtc_w = mode->hdisplay;
> +	plane.crtc_h = mode->vdisplay;
> +	plane.crtc_id = crtc->obj;
> +	plane.fb_id = igt_create_pattern_fb(plane.state->desc->fd,
> +					    plane.crtc_w, plane.crtc_h,
> +					    format, I915_TILING_NONE, &fb);
> +
> +	drmModeAtomicSetCursor(req, 0);
> +	crtc_populate_req(crtc, req);
> +	plane_populate_req(&plane, req);
> +	ret = drmModeAtomicCommit(crtc->state->desc->fd, req,
> +				  DRM_MODE_ATOMIC_TEST_ONLY, NULL);
> +
> +	igt_assert_eq(ret, 0);
> +
> +	/* go through dpms off/on cycle */
> +	set_dpms(crtc->state->desc->fd, DRM_MODE_DPMS_OFF);
> +	set_dpms(crtc->state->desc->fd, DRM_MODE_DPMS_ON);
Could probably just set the crtc's active property, same effect with less code.

Either way.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>


> +	/* check the state */
> +	crtc_check_current_state(crtc, plane_old, ATOMIC_RELAX_NONE);
> +	plane_check_current_state(plane_old, ATOMIC_RELAX_NONE);
> +
> +	/* Re-enable the plane through the legacy CRTC/primary-plane API, and
> +	 * verify through atomic. */
> +	crtc_commit_legacy(crtc, plane_old, CRTC_RELAX_MODE);
> +
> +	drmModeAtomicFree(req);
> +}
> +
>  static void plane_cursor(struct kms_atomic_crtc_state *crtc,
>  			 struct kms_atomic_plane_state *plane_old)
>  {
> @@ -1427,6 +1497,18 @@ igt_main
>  		atomic_state_free(scratch);
>  	}
>  
> +	igt_subtest("test_only") {
> +		struct kms_atomic_state *scratch = atomic_state_dup(current);
> +		struct kms_atomic_crtc_state *crtc = find_crtc(scratch, true);
> +		struct kms_atomic_plane_state *plane =
> +			find_plane(scratch, PLANE_TYPE_PRIMARY, crtc);
> +
> +		igt_require(crtc);
> +		igt_require(plane);
> +		test_only(crtc, plane);
> +		atomic_state_free(scratch);
> +	}
> +
>  	igt_subtest("plane_cursor_legacy") {
>  		struct kms_atomic_state *scratch = atomic_state_dup(current);
>  		struct kms_atomic_crtc_state *crtc = find_crtc(scratch, true);