Commit dac6ce66 authored by Anusha Srivatsa's avatar Anusha Srivatsa Committed by Radhakrishna Sripada
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drm/i915/mtl: Pin assignment for TypeC 



Unlike previous platforms that used PORT_TX_DFLEXDPSP
for max_lane calculation, MTL uses only PORT_TX_DFLEXPA1
from which the max_lanes has to be calculated.

Bspec: 50235, 65380

Reviewed-by: default avatarMatt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: default avatarAnusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: default avatarJose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: default avatarMika Kahola <mika.kahola@intel.com>
Signed-off-by: default avatarRadhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428095433.4109054-13-mika.kahola@intel.com
parent 4366750a

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

+28 −0
Original line number Diff line number Diff line
@@ -16,6 +16,10 @@ 
#include "intel_mg_phy_regs.h"

#include "intel_tc.h"



#define DP_PIN_ASSIGNMENT_C	0x3

#define DP_PIN_ASSIGNMENT_D	0x4

#define DP_PIN_ASSIGNMENT_E	0x5



enum tc_port_mode {

	TC_PORT_DISCONNECTED,

	TC_PORT_TBT_ALT,
@@ -281,6 +285,27 @@ u32 intel_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port) 
	       DP_PIN_ASSIGNMENT_SHIFT(tc->phy_fia_idx);

}



static int mtl_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port)

{

	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);

	intel_wakeref_t wakeref;

	u32 pin_mask;



	with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref)

		pin_mask = intel_tc_port_get_pin_assignment_mask(dig_port);



	switch (pin_mask) {

	default:

		MISSING_CASE(pin_mask);

		fallthrough;

	case DP_PIN_ASSIGNMENT_D:

		return 2;

	case DP_PIN_ASSIGNMENT_C:

	case DP_PIN_ASSIGNMENT_E:

		return 4;

	}

}



int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)

{

	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
@@ -294,6 +319,9 @@ int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port) 


	assert_tc_cold_blocked(tc);



	if (DISPLAY_VER(i915) >= 14)

		return mtl_tc_port_get_pin_assignment_mask(dig_port);



	lane_mask = 0;

	with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref)

		lane_mask = intel_tc_port_get_lane_mask(dig_port);