[PATCH i-g-t] test/kms_content_protection: Account for reauthetication in LIC

[Reddy Guddati, Santhosh]

LGTM,

On 03-12-2024 11:45, Suraj Kandpal wrote:
> During LIC the link may fail due to a variety of reasons but this
> does not reflect a problem with HDCP. It becomes a problem only when
> we are not able to recover from the Link Integrity Failure.
> Add a check to see if CP property is CP_DESIRED and if so give it time
> to reauthenticate and fail only if this reauthentication does not
> happen.
> 
> --v2
> -Add debug statement [Santhosh]
> -Add closes tag [Santhosh]
> 
> Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/3508
> Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
Reviewed-by: Santhosh Reddy Guddati <santhosh.reddy.guddati at intel.com>
> ---
>   tests/kms_content_protection.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/tests/kms_content_protection.c b/tests/kms_content_protection.c
> index 59dca54df..04dff7a05 100644
> --- a/tests/kms_content_protection.c
> +++ b/tests/kms_content_protection.c
> @@ -376,9 +376,17 @@ static bool igt_pipe_is_free(igt_display_t *display, enum pipe pipe)
>   static void test_cp_lic(igt_output_t *output)
>   {
>   	bool ret;
> +	uint64_t val;
>   
>   	/* Wait for 4Secs (min 2 cycles of Link Integrity Check) */
>   	ret = wait_for_prop_value(output, CP_DESIRED, LIC_PERIOD_MSEC);
> +	val = igt_output_get_prop(output,
> +				  IGT_CONNECTOR_CONTENT_PROTECTION);
> +	if (val == CP_DESIRED) {
> +		igt_debug("Link Integrity Check failed, waiting for reauthentication\n");
> +		ret = wait_for_prop_value(output, CP_DESIRED, LIC_PERIOD_MSEC);
> +	}
> +
>   	igt_assert_f(!ret, "Content Protection LIC Failed\n");
>   }
>