Re: [PATCH i-g-t 1/3] tests/intel/kms_mst_helper: Add helper to check for MST outputs

["Thasleem, Mohammed" <mohammed.thasleem@intel.com>]

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On 20-02-2026 08:52 pm, Kunal Joshi wrote:
> Add igt_display_has_mst_output() helper function to check
> if a display has at least one DP MST output connected.
> This is useful for tests that need to verify MST output
> availability before running.
>
> Signed-off-by: Kunal Joshi<kunal1.joshi@intel.com>
> ---
>   tests/intel/kms_mst_helper.c | 19 +++++++++++++++++++
>   tests/intel/kms_mst_helper.h |  1 +
>   2 files changed, 20 insertions(+)
>
> diff --git a/tests/intel/kms_mst_helper.c b/tests/intel/kms_mst_helper.c
> index aef74cd31..6b986a45c 100644
> --- a/tests/intel/kms_mst_helper.c
> +++ b/tests/intel/kms_mst_helper.c
> @@ -46,3 +46,22 @@ int igt_find_all_mst_output_in_topology(int drm_fd, igt_display_t *display,
>   	}
>   	return 0;
>   }
> +
/**
  * igt_display_has_mst_output:
-->with above two lines addition, LGTM:

Reviewed-by: Mohammed Thasleem <mohammed.thasleem@intel.com>

> +/*
> + * @display: pointer to #igt_display_t structure
> + *
> + * Iterates over all connected outputs and checks if any of them
> + * is a DP MST output.
> + *
> + * Returns: true if at least one MST output is found, false otherwise
> + */
> +bool igt_display_has_mst_output(igt_display_t *display)
> +{
> +    igt_output_t *output;
> +
> +    for_each_connected_output(display, output) {
> +        if (igt_check_output_is_dp_mst(output))
> +            return true;
> +    }
> +    return false;
> +}
> diff --git a/tests/intel/kms_mst_helper.h b/tests/intel/kms_mst_helper.h
> index 7391494ab..0e8ece0a0 100644
> --- a/tests/intel/kms_mst_helper.h
> +++ b/tests/intel/kms_mst_helper.h
> @@ -12,4 +12,5 @@ int igt_find_all_mst_output_in_topology(int drm_fd, igt_display_t *display,
>   					igt_output_t *output,
>   					igt_output_t *mst_outputs[],
>   					int *num_mst_outputs);
> +bool igt_display_has_mst_output(igt_display_t *display);
>   #endif

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