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Date: Thu, 24 Aug 2023 14:09:37 +0530
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To: Swati Sharma <swati2.sharma@intel.com>, <igt-dev@lists.freedesktop.org>
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 <20230824081256.1164530-3-swati2.sharma@intel.com>
From: "Modem, Bhanuprakash" <bhanuprakash.modem@intel.com>
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Subject: Re: [igt-dev] [v3 2/4] lib/igt_kms: add helper for dp-mst connector
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On Thu-24-08-2023 01:42 pm, Swati Sharma wrote:
> Helper is added which returns dp-mst connector id.
> 
> v2: -use connector_path instead of blob (Bhanu)
>      -rewrite helper (Bhanu/Ankit)
> 
> Signed-off-by: Swati Sharma <swati2.sharma@intel.com>

Reviewed-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>

> ---
>   lib/igt_kms.c | 33 +++++++++++++++++++++++++++++++++
>   lib/igt_kms.h |  1 +
>   2 files changed, 34 insertions(+)
> 
> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> index 3af10946c..c2f3728a6 100644
> --- a/lib/igt_kms.c
> +++ b/lib/igt_kms.c
> @@ -6050,3 +6050,36 @@ bool igt_check_output_is_dp_mst(igt_output_t *output)
>   {
>   	return !!output->config.connector_path;
>   }
> +
> +static int parse_path_connector(char *connector_path)
> +{
> +	int connector_id;
> +	char *encoder;
> +
> +	encoder = strtok(connector_path, ":");
> +	igt_assert_f(!strcmp(encoder, "mst"), "PATH connector property expected to have 'mst'\n");
> +
> +	connector_id = atoi(strtok(NULL, "-"));
> +
> +	return connector_id;
> +}
> +
> +/**
> + * igt_get_dp_mst_connector_id
> + * @output: Target output
> + *
> + * Returns: connector id if output is dp-mst, else -EINVAL.
> + */
> +int igt_get_dp_mst_connector_id(igt_output_t *output)
> +{
> +	int connector_id;
> +	char *connector_path;
> +
> +	if (!igt_check_output_is_dp_mst(output))
> +		return -EINVAL;
> +
> +	connector_path = output->config.connector_path;
> +	connector_id = parse_path_connector(connector_path);
> +
> +	return connector_id;
> +}
> diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> index 35826d4bd..f2c3741fc 100644
> --- a/lib/igt_kms.h
> +++ b/lib/igt_kms.h
> @@ -1014,5 +1014,6 @@ bool igt_check_bigjoiner_support(igt_display_t *display);
>   bool igt_parse_mode_string(const char *mode_string, drmModeModeInfo *mode);
>   bool i915_pipe_output_combo_valid(igt_display_t *display);
>   bool igt_check_output_is_dp_mst(igt_output_t *output);
> +int igt_get_dp_mst_connector_id(igt_output_t *output);
>   
>   #endif /* __IGT_KMS_H__ */