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drm/i915/mtl: Pin assignment for TypeC

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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: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Jose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428095433.4109054-13-mika.kahola@intel.com
This commit is contained in:
Anusha Srivatsa 2023-04-28 12:54:32 +03:00 committed by Radhakrishna Sripada
parent 4366750a0d
commit dac6ce66db
1 changed files with 28 additions and 0 deletions
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28
drivers/gpu/drm/i915/display/intel_tc.c
View File

@ -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);