[igt-dev] [PATCH i-g-t 3/3] kms_content_protection: Confirm that LIC is passed

[Daniel Vetter]

On Fri, Feb 08, 2019 at 01:01:39AM +0530, Ramalingam C wrote:
> Once the HDCP is enabled, kernel will run the link integrity check(LIC)
> atleast once in 2Secs based on the HDCP versions.
> 
> So to confirm the link integrity check is passed, we oberve that HDCP
> state remains ENABLED for next 4Secs.
> 
> v2:
>   Rebased.
> 
> Signed-off-by: Ramalingam C <ramalingam.c at intel.com>

Somehow my reply in the previous discussion didn't make it out to the
list.

> ---
>  tests/kms_content_protection.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/tests/kms_content_protection.c b/tests/kms_content_protection.c
> index e2d5134421aa..234ba08fae0d 100644
> --- a/tests/kms_content_protection.c
> +++ b/tests/kms_content_protection.c
> @@ -214,6 +214,14 @@ static bool igt_pipe_is_free(igt_display_t *display, enum pipe pipe)
>  	return true;
>  }
>  
> +static void test_cp_lic(igt_output_t *output)
> +{
> +	bool ret;
> +
> +	/* Wait for 4Secs (min 2 cycles of Link Integrity Check) */
> +	ret = wait_for_prop_value(output, 1, 4 * 1000);
> +	igt_assert_f(!ret, "Content Protection LIC Failed\n");
> +}

With your explanation, makes sense now.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

It would be nice though to follow up with a patch to replace all the magic
numbers with some local #defines, e.g.

#define LOCAL_CONTENT_PROTECTION_DESIRED 1

Similar for others. That way we don't depend upon the header and stuff,
and the code becomes a lot less confusing.
-Daniel

>  
>  static void test_content_protection_on_output(igt_output_t *output,
>  					      enum igt_commit_style s,
> @@ -238,6 +246,7 @@ static void test_content_protection_on_output(igt_output_t *output,
>  
>  		modeset_with_fb(pipe, output, s);
>  		test_cp_enable_with_retry(output, s, 3);
> +		test_cp_lic(output);
>  
>  		if (dpms_test) {
>  			igt_pipe_set_prop_value(display, pipe, IGT_CRTC_ACTIVE, 0);
> -- 
> 2.7.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch