Hello Jeevan,

On 7/23/2024 9:58 AM, Jeevan B wrote:
> Validate pseudo static refresh rate changes in the VRR with
> fixed refresh rate framework for non-psr scenarios.
>
> v2: Add PR check.
>
> Signed-off-by: Jeevan B<jeevan.b@intel.com>
> ---
>   tests/kms_vrr.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++--
>   1 file changed, 56 insertions(+), 2 deletions(-)
>
> diff --git a/tests/kms_vrr.c b/tests/kms_vrr.c
> index 7e8885f16..d45d38657 100644
> --- a/tests/kms_vrr.c
> +++ b/tests/kms_vrr.c
> @@ -31,12 +31,18 @@
>    */
>   
>   #include "igt.h"
> +#include "igt_psr.h"
>   #include "i915/intel_drrs.h"
>   #include "sw_sync.h"
>   #include <fcntl.h>
>   #include <signal.h>
>   
>   /**
> + * SUBTEST: lobf
> + * Description: Test to validate link-off between active frames in non-psr
> + *              operation
> + * Functionality: LOBF
> + *
>    * SUBTEST: cmrr
>    * Description: Test to validate the content rate to exactly match with the
>    * 		requested rate without any frame drops.
> @@ -106,7 +112,8 @@ enum {
>   	TEST_FASTSET = 1 << 7,
>   	TEST_MAXMIN = 1 << 8,
>   	TEST_CMRR = 1 << 9,
> -	TEST_NEGATIVE = 1 << 10,
> +	TEST_LINK_OFF = 1 << 10,
> +	TEST_NEGATIVE = 1 << 11,
>   };
>   
>   enum {
> @@ -129,6 +136,7 @@ typedef struct vtest_ns {
>   typedef struct data {
>   	igt_display_t display;
>   	int drm_fd;
> +	int debugfs_fd;
>   	igt_plane_t *primary;
>   	igt_fb_t fb[2];
>   	range_t range;
> @@ -784,6 +792,44 @@ test_seamless_virtual_rr_basic(data_t *data, enum pipe pipe, igt_output_t *outpu
>   	}
>   }
>   
> +static void
> +test_lobf(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
> +{
> +	bool change_mode = false;
> +	time_t startTime = time(NULL);
> +	time_t secs = 4, change_time = 3;
> +	igt_plane_t *primary;
> +	drmModeModeInfo mode = *igt_output_get_mode(output);
> +
> +	igt_info("LOBF test execution on %s, PIPE %s with VRR range: (%u-%u) Hz\n",
> +		 output->name, kmstest_pipe_name(pipe), data->range.min, data->range.max);
> +
> +	igt_require(output->config.connector->connector_type == DRM_MODE_CONNECTOR_eDP);
> +	igt_require(!igt_get_i915_edp_lobf_status(data->drm_fd, output->name));
> +	if (psr_sink_support(data->drm_fd, data->debugfs_fd, PSR_MODE_1, NULL) ||
> +	    psr_sink_support(data->drm_fd, data->debugfs_fd, PR_MODE, NULL))
> +		psr_disable(data->drm_fd, data->debugfs_fd, NULL);
> +
> +	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
> +	igt_create_color_fb(data->drm_fd, mode.hdisplay, mode.vdisplay,
> +			    DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_LINEAR,
> +			    1, 1, 1, &data->fb[0]);
> +
> +	igt_output_override_mode(output, &data->switch_modes[HIGH_RR_MODE]);
> +
> +	while (time(NULL) - startTime < secs) {
> +		igt_plane_set_fb(primary, &data->fb[0]);
> +		igt_display_commit(&data->display);
> +		if (!change_mode && time(NULL) - startTime >= change_time) {
> +			igt_output_override_mode(output, &data->switch_modes[LOW_RR_MODE]);
> +			change_time = true;
> +		}
> +	}
>
> Consider we have very less difference between LOW_RR and HIGH_RR,
> Will we still get sufficienct extended vblank to always turn the link off?
>
> @Animesh can you also clarify here if we somehow can know exact time required to do link off?
>
> +
> +	igt_assert_f(igt_get_i915_edp_lobf_status(data->drm_fd, output->name),
> +		     "LOBF not enabled\n");
> +}
> +
>   static void
>   test_cmrr(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
>   {
> @@ -973,6 +1019,7 @@ igt_main_args("drs:", long_opts, help_str, opt_handler, &data)
>   {
>   	igt_fixture {
>   		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
> +		data.debugfs_fd = igt_debugfs_dir(data.drm_fd);
>   
>   		kmstest_set_vt_graphics_mode();
>   
> @@ -1030,13 +1077,20 @@ igt_main_args("drs:", long_opts, help_str, opt_handler, &data)
>   		igt_subtest_with_dynamic("seamless-rr-switch-virtual")
>   			run_vrr_test(&data, test_seamless_virtual_rr_basic, TEST_SEAMLESS_VIRTUAL_RR);
>   
> -		igt_describe("Test to validate the the content rate exactly match with the "
> +		igt_describe("Test to validate the content rate exactly match with the "
>   			     "requested rate without any frame drops.");
>   		igt_subtest_with_dynamic("cmrr") {
>   			igt_require(intel_display_ver(intel_get_drm_devid(data.drm_fd)) >= 20);
>   
>   			run_vrr_test(&data, test_cmrr, TEST_CMRR);
>   		}
> +		igt_describe("Test to validate the link-off between active frames in "
> +			     "non-PSR operation.");
> +		igt_subtest_with_dynamic("lobf") {
> +			igt_require(intel_display_ver(intel_get_drm_devid(data.drm_fd)) >= 20);
> +
> +			run_vrr_test(&data, test_lobf, TEST_LINK_OFF);
> +		}
>   	}
>   
>   	igt_fixture {
Thanks and Regards
Kunal Joshi