On Tue, Oct 15, 2019 at 09:40:26AM -0700, Lucas De Marchi wrote:
> Both Ice Lake and Elkhart Lake (gen 11) support MST on all external
> connections except DDI A. Tiger Lake (gen 12) supports on all external
> connections.
>
> Move the check to happen inside intel_dp_mst_encoder_init() and add
> specific platform checks.
>
> v2: Replace != with == checks for ports on gen < 11 (Ville)
>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 7 ++-----
> drivers/gpu/drm/i915/display/intel_dp_mst.c | 22 +++++++++++++++------
> 2 files changed, 18 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 6594f2af1257..415d0f2c2751 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -7271,11 +7271,8 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
> intel_connector->get_hw_state = intel_connector_get_hw_state;
>
> /* init MST on ports that can support it */
> - if (HAS_DP_MST(dev_priv) && !intel_dp_is_edp(intel_dp) &&
> - (port == PORT_B || port == PORT_C ||
> - port == PORT_D || port == PORT_F))
> - intel_dp_mst_encoder_init(intel_dig_port,
> - intel_connector->base.base.id);
> + intel_dp_mst_encoder_init(intel_dig_port,
> + intel_connector->base.base.id);
>
> if (!intel_edp_init_connector(intel_dp, intel_connector)) {
> intel_dp_aux_fini(intel_dp);
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index 2203be28ea01..ea062fea8a44 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -655,21 +655,31 @@ intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
> int
> intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
> {
> + struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev);
> struct intel_dp *intel_dp = &intel_dig_port->dp;
> - struct drm_device *dev = intel_dig_port->base.base.dev;
> + enum port port = intel_dig_port->base.port;
> int ret;
>
> - intel_dp->can_mst = true;
> + if (!HAS_DP_MST(i915) || intel_dp_is_edp(intel_dp))
> + return 0;
> +
> + if (INTEL_GEN(i915) <= 11 && port == PORT_A)
> + return 0;
gen<12
with that
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> +
> + if (INTEL_GEN(i915) < 11 && port == PORT_E)
> + return 0;
> +
> intel_dp->mst_mgr.cbs = &mst_cbs;
>
> /* create encoders */
> intel_dp_create_fake_mst_encoders(intel_dig_port);
> - ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev,
> + ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, &i915->drm,
> &intel_dp->aux, 16, 3, conn_base_id);
> - if (ret) {
> - intel_dp->can_mst = false;
> + if (ret)
> return ret;
> - }
> +
> + intel_dp->can_mst = true;
> +
> return 0;
> }
>
> --
> 2.23.0
--
Ville Syrjälä
Intel
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