From: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
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
Cc: Mika Kahola <mika.kahola@xxxxxxxxx>
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Signed-off-by: Jose Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_tc.c | 30 +++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index dba10bcc6b66..1bc81adf1ad7 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -13,6 +13,10 @@
#include "intel_tc.h"
#include "intel_tc_phy_regs.h"
+#define DP_PIN_ASSIGNMENT_C 0x3
+#define DP_PIN_ASSIGNMENT_D 0x4
+#define DP_PIN_ASSIGNMENT_E 0x5
+
static const char *tc_port_mode_name(enum tc_port_mode mode)
{
static const char * const names[] = {
@@ -149,6 +153,29 @@ u32 intel_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port)
DP_PIN_ASSIGNMENT_SHIFT(dig_port->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;
+
+ assert_tc_cold_blocked(dig_port);
+
+ 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);
@@ -158,6 +185,9 @@ int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)
if (dig_port->tc_mode != TC_PORT_DP_ALT)
return 4;
+ if (DISPLAY_VER(i915) >= 14)
+ return mtl_tc_port_get_pin_assignment_mask(dig_port);
+
assert_tc_cold_blocked(dig_port);
lane_mask = 0;
--
2.34.1
