On Thu, Jan 28, 2021 at 05:59:48PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> We shouldn't really trust tc_mode on non-TC PHYs since we never
> initialize it explicitly. So let's check for the PHY type first.
> Fortunately TC_PORT_TBT_ALT happens to be zero so I don't think
> there's an actual bug here, just a possibility for a future one
> if someone rearranges the enum values.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index efcdf5499903..5bc5033a2dea 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -3463,10 +3463,12 @@ icl_program_mg_dp_mode(struct intel_digital_port *dig_port,
> {
> struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
> enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
> + enum phy phy = intel_port_to_phy(dev_priv, dig_port->base.port);
> u32 ln0, ln1, pin_assignment;
> u8 width;
>
> - if (dig_port->tc_mode == TC_PORT_TBT_ALT)
> + if (!intel_phy_is_tc(dev_priv, phy) ||
> + dig_port->tc_mode == TC_PORT_TBT_ALT)
> return;
>
> if (INTEL_GEN(dev_priv) >= 12) {
> --
> 2.26.2
>
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