[PATCH i-g-t v4 5/5] lib/igt_kms: Add function to get valid pipe for specific output

[Karthik B S]

Hi Louis,

On 1/10/2025 11:12 PM, Louis Chauvet wrote:
> Introduces a new function igt_get_pipe_for_output in igt_kms. The function
> is designed to retrieve a valid pipe for a specific output in a display.
>
> Signed-off-by: Louis Chauvet <louis.chauvet at bootlin.com>
> ---
>   lib/igt_kms.c | 22 ++++++++++++++++++++++
>   lib/igt_kms.h |  1 +
>   2 files changed, 23 insertions(+)
>
> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> index f6d9341b75b4fc8dfa614478cd3bf35510f9ecea..d6cd6833ef24a914da6e0234dd7eea40867df452 100644
> --- a/lib/igt_kms.c
> +++ b/lib/igt_kms.c
> @@ -7458,3 +7458,25 @@ uint32_t igt_get_connector_id_from_mst_path(int drm_fd, const void *mst_path)
>   
>   	return 0;
>   }
> +
> +/**
> + * igt_get_pipe_for_output:
> + * @display: display to fetch the pipes
> + * @output: output to use
> + *
> + * Get a valid pipe for a specific output. The return value is the pipe first valid pipe for a
> + * specific output.
> + */
> +enum pipe igt_get_pipe_for_output(igt_display_t *display,
> +				  igt_output_t *output)
> +{
> +	enum pipe pipe;
> +
> +	for_each_pipe(display, pipe) {
> +		if (igt_output_is_connected(output) &&
> +		     (output->config.valid_crtc_idx_mask & (1 << (pipe))))

Please use 'igt_pipe_connector_valid'.

Also, this function is mostly a duplicate of the existing 
'chamelium_get_pipe_for_output'. Could we reuse the existing function 
here instead of adding a new one?

Thanks,
Karthik.B.S
> +			return pipe;
> +	}
> +
> +	return PIPE_NONE;
> +}
> diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> index 3be9068384aa118461dd090224d15aa5c979ac06..60a90500048dd83620c8a6ed08b70d5ddb020bbc 100644
> --- a/lib/igt_kms.h
> +++ b/lib/igt_kms.h
> @@ -1285,5 +1285,6 @@ int igt_get_connected_connectors(int drm_fd, uint32_t **connector_ids);
>   drmModeConnectorPtr igt_get_connector_from_name(int drm_fd, const char *port_name);
>   uint32_t igt_get_connector_id_from_name(int drm_fd, const char *port_name);
>   uint32_t igt_get_connector_id_from_mst_path(int drm_fd, const void *mst_path);
> +enum pipe igt_get_pipe_for_output(igt_display_t *display, igt_output_t *output);
>   
>   #endif /* __IGT_KMS_H__ */
>