[igt-dev] [i-g-t 3/5] tests/kms_vrr: Add Negative tests to validate VRR

[Navare, Manasi]

On Thu, Feb 24, 2022 at 10:46:46AM +0530, Bhanuprakash Modem wrote:
> This patch will try to enable VRR on Non-VRR panel. VRR should
> not be enabled on the Non-VRR panel. Hence Kernel should reject
> the commit.
> 
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
> ---
>  tests/kms_vrr.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 67 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/kms_vrr.c b/tests/kms_vrr.c
> index 8976d4a6c3..7deab77311 100644
> --- a/tests/kms_vrr.c
> +++ b/tests/kms_vrr.c
> @@ -45,6 +45,7 @@ enum {
>  	TEST_DPMS = 1 << 0,
>  	TEST_SUSPEND = 1 << 1,
>  	TEST_FLIPLINE = 1 << 2,
> +	TEST_NEGATIVE = 1 << 3,
>  };
>  
>  typedef struct range {
> @@ -244,6 +245,34 @@ static void prepare_test(data_t *data, igt_output_t *output, enum pipe pipe)
>  	igt_display_commit2(&data->display, COMMIT_ATOMIC);
>  }
>  
> +static void prepare_negative_test(data_t *data, igt_output_t *output, enum pipe pipe)
> +{
> +	drmModeModeInfo *mode;
> +
> +	/* Reset output */
> +	igt_display_reset(&data->display);
> +	igt_output_set_pipe(output, pipe);
> +
> +	/* Capture VRR range */
> +	data->range = get_vrr_range(data, output);
> +
> +	/* Prepare resources */
> +	mode = igt_output_get_mode(output);
> +	igt_assert(igt_create_fb(data->drm_fd, mode->hdisplay, mode->vdisplay,
> +				 DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_LINEAR,
> +				 &data->fb0));
> +
> +	/* Take care of any required modesetting before the test begins. */
> +	data->primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
> +	igt_plane_set_fb(data->primary, &data->fb0);
> +
> +	/* Clear vrr_enabled state before enabling it, because
> +	 * it might be left enabled if the previous test fails.
> +	 */
> +	igt_pipe_set_prop_value(&data->display, pipe, IGT_CRTC_VRR_ENABLED, 0);
> +	igt_display_commit2(&data->display, COMMIT_ATOMIC);
> +}
> +
>  /* Performs an atomic non-blocking page-flip on a pipe. */
>  static void
>  do_flip(data_t *data, igt_fb_t *fb)
> @@ -430,6 +459,32 @@ test_basic(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
>  	igt_remove_fb(data->drm_fd, &data->fb0);
>  }
>  
> +/* VRR on Non-VRR panel: VRR should not be enabled on the Non-VRR panel.
> + * Kernel should reject the commit.
> + */
> +static void
> +test_negative_basic(data_t *data, enum pipe pipe,
> +		    igt_output_t *output, uint32_t flags)
> +{
> +	int ret;
> +
> +	igt_info("VRR Negative Test execution on %s, PIPE_%s.\n",
> +			output->name, kmstest_pipe_name(pipe));
> +
> +	prepare_negative_test(data, output, pipe);
> +	igt_pipe_set_prop_value(&data->display, pipe, IGT_CRTC_VRR_ENABLED, 1);
> +
> +	ret = igt_display_try_commit2(&data->display, COMMIT_ATOMIC);
> +	igt_assert_f(ret == 0, "VRR shouln't be enabled on Non-VRR panel.\n");

No this is not correct since in the kernel, if its a non VRR panel then it will just
do the modeset without enabling VRR so you will just see the visual artifacts but not reject it.

Manasi

> +
> +	/* Clean-up */
> +	igt_plane_set_fb(data->primary, NULL);
> +	igt_output_set_pipe(output, PIPE_NONE);
> +	set_vrr_on_pipe(data, pipe, false);
> +
> +	igt_remove_fb(data->drm_fd, &data->fb0);
> +}
> +
>  /* Runs tests on outputs that are VRR capable. */
>  static void
>  run_vrr_test(data_t *data, test_t test, uint32_t flags)
> @@ -439,8 +494,14 @@ run_vrr_test(data_t *data, test_t test, uint32_t flags)
>  	for_each_connected_output(&data->display, output) {
>  		enum pipe pipe;
>  
> -		if (!has_vrr(output))
> -			continue;
> +		/* For Negative tests, panel should be non-vrr. */
> +		if (flags & TEST_NEGATIVE) {
> +			if (has_vrr(output))
> +				continue;
> +		} else {
> +			if (!has_vrr(output))
> +				continue;
> +		}
>  
>  		for_each_pipe(&data->display, pipe) {
>  			if (igt_pipe_connector_valid(pipe, output)) {
> @@ -486,6 +547,10 @@ igt_main
>  	igt_subtest_with_dynamic("flipline")
>  		run_vrr_test(&data, test_basic, TEST_FLIPLINE);
>  
> +	igt_describe("Make sure that VRR should not be enabled on the Non-VRR panel.");
> +	igt_subtest_with_dynamic("negative-basic")
> +		run_vrr_test(&data, test_negative_basic, TEST_NEGATIVE);
> +
>  	igt_fixture {
>  		igt_display_fini(&data.display);
>  	}
> -- 
> 2.35.0
>