drm/i915/display: For MTL+ platforms skip mg dp programming

For MTL+ platforms we use PICA chips for Type-C support and
hence mg programming is not needed.

Fixes issue with drm warn of TC port not being in legacy mode.

Cc: [email protected]

Signed-off-by: Mika Kahola <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Reviewed-by: Gustavo Sousa <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit aaf9dc8)
Signed-off-by: Jani Nikula <[email protected]>

Author: ideak

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -2088,6 +2088,9 @@ icl_program_mg_dp_mode(struct intel_digital_port *dig_port,
 	u32 ln0, ln1, pin_assignment;
 	u8 width;
 
+	if (DISPLAY_VER(dev_priv) >= 14)
+		return;
+
 	if (!intel_encoder_is_tc(&dig_port->base) ||
 	    intel_tc_port_in_tbt_alt_mode(dig_port))
 		return;