Re: [PATCH i-g-t v8 7/9] tests/intel/kms_ccs: set mask for available hardware pipes

["Juha-Pekka Heikkilä" <juhapekka.heikkila@gmail.com>]

Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>

On 13/10/2026 19.10, Michał Grzelak wrote:
> Mapping from hardware pipe into CRTC is needed when testing suspend
> since we need to run test on at least first and last pipe. Currently
> there is a direct mapping between CRTC and hardware pipe but this will
> break after introduction of pipe reordering.
> 
> Compute array of all available hardware pipes. While doing it also
> compute first and last pipe. Skip whole test when there is no available
> pipe.
> 
> Skip testing CRTCs that map to unavailable pipes. Currently this is a
> no-op but this will change after limiting suspend tests to first and
> last pipe.
> 
> v7->v8
> - add patch
> 
> Signed-off-by: Michał Grzelak <michal.grzelak@linux.intel.com>
> ---
>   tests/intel/kms_ccs.c | 31 +++++++++++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
> 
> diff --git a/tests/intel/kms_ccs.c b/tests/intel/kms_ccs.c
> index 8526f1ccfd..734dafd110 100644
> --- a/tests/intel/kms_ccs.c
> +++ b/tests/intel/kms_ccs.c
> @@ -189,6 +189,7 @@ typedef struct {
>   	bool user_seed;
>   	enum igt_commit_style commit;
>   	int fb_list_length;
> +	bool available_pipes[IGT_MAX_PIPES];
>   	bool do_hibernate;
>   	bool all_outputs;
>   	struct {
> @@ -1088,6 +1089,30 @@ static int test_ccs(data_t *data)
>   	return valid_tests;
>   }
>   
> +static bool set_available_hw_pipes(data_t *data)
> +{
> +	enum hardware_pipe first_pipe = IGT_MAX_PIPES;
> +	enum hardware_pipe last_pipe = PIPE_NONE;
> +	enum hardware_pipe hw_pipe;
> +	igt_crtc_t *crtc;
> +
> +	for_each_crtc(&data->display, crtc) {
> +		hw_pipe = crtc->hardware_pipe;
> +		data->available_pipes[hw_pipe] = true;
> +
> +		if (last_pipe < hw_pipe)
> +			last_pipe = hw_pipe;
> +
> +		if (first_pipe > hw_pipe)
> +			first_pipe = hw_pipe;
> +	}
> +
> +	if (first_pipe == IGT_MAX_PIPES || last_pipe == PIPE_NONE)
> +		return false;
> +
> +	return true;
> +}
> +
>   static bool skip_plane(data_t *data, igt_plane_t *plane)
>   {
>   	int index = plane->index;
> @@ -1176,6 +1201,9 @@ static void test_output(data_t *data, const int testnum)
>   					if (!intel_pipe_output_combo_valid(&data->display))
>   						continue;
>   
> +					if (!data->available_pipes[crtc->hardware_pipe])
> +						continue;
> +
>   					igt_dynamic_f("pipe-%s-%s", igt_crtc_name(crtc), data->output->name) {
>   						int valid_tests = 0;
>   
> @@ -1269,6 +1297,9 @@ int igt_main_args("csrn:", NULL, help_str, opt_handler, &data)
>   		data.fb_list_length = 0;
>   	}
>   
> +	igt_fixture()
> +		igt_require_f(set_available_hw_pipes(&data), "no pipe available\n");
> +
>   	for (int c = 0; c < ARRAY_SIZE(tests); c++)
>   		test_output(&data, c);
>