[PATCH] drm/i915/mst: update max stream count to match number of pipes

[Ville Syrjälä]

On Wed, Feb 26, 2025 at 03:56:26PM +0200, Jani Nikula wrote:
> We create the stream encoders and attach connectors for each pipe we
> have. As the number of pipes has increased, we've failed to update the
> topology manager maximum number of payloads to match that. Bump up the
> max stream count to match number of pipes, enabling the fourth stream on
> platforms that support four pipes.
> 
> Cc: stable at vger.kernel.org
> Cc: Imre Deak <imre.deak at intel.com>
> Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_dp_mst.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index 167e4a70ab12..822218d8cfd4 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -1896,7 +1896,8 @@ intel_dp_mst_encoder_init(struct intel_digital_port *dig_port, int conn_base_id)
>  	/* create encoders */
>  	mst_stream_encoders_create(dig_port);
>  	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, display->drm,
> -					   &intel_dp->aux, 16, 3, conn_base_id);
> +					   &intel_dp->aux, 16,
> +					   INTEL_NUM_PIPES(display), conn_base_id);
>  	if (ret) {
>  		intel_dp->mst_mgr.cbs = NULL;
>  		return ret;
> -- 
> 2.39.5

-- 
Ville Syrjälä
Intel