From: Clinton A Taylor <clinton.a.taylor@xxxxxxxxx>
Add a helper function to return pin map for use during dkl phy
DP_MODE settings, PORT_TX_DFLEXPA1 exist on ICL but we don't need it.
The user of this function will come in future TC patches.
Signed-off-by: Clinton A Taylor <clinton.a.taylor@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_tc.c | 15 +++++++++++++++
drivers/gpu/drm/i915/display/intel_tc.h | 1 +
drivers/gpu/drm/i915/i915_reg.h | 5 +++++
3 files changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index 20fbb084830e..5d9577588e91 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -70,6 +70,21 @@ u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port)
DP_LANE_ASSIGNMENT_SHIFT(dig_port->tc_phy_fia_idx);
}
+u32 intel_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port)
+{
+ struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
+ struct intel_uncore *uncore = &i915->uncore;
+ u32 pin_mask;
+
+ pin_mask = intel_uncore_read(uncore,
+ PORT_TX_DFLEXPA1(dig_port->tc_phy_fia));
+
+ WARN_ON(pin_mask == 0xffffffff);
+
+ return (pin_mask & DP_PIN_ASSIGNMENT_MASK(dig_port->tc_phy_fia_idx)) >>
+ DP_PIN_ASSIGNMENT_SHIFT(dig_port->tc_phy_fia_idx);
+}
+
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);
diff --git a/drivers/gpu/drm/i915/display/intel_tc.h b/drivers/gpu/drm/i915/display/intel_tc.h
index 944d84c8cce1..1b8638dd340a 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.h
+++ b/drivers/gpu/drm/i915/display/intel_tc.h
@@ -14,6 +14,7 @@ struct drm_i915_private;
bool intel_tc_port_connected(struct intel_digital_port *dig_port);
u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port);
+u32 intel_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port);
int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port);
void intel_tc_port_set_fia_lane_count(struct intel_digital_port *dig_port,
int required_lanes);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 32f98d0e0e9c..91a79e809dd2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -11845,4 +11845,9 @@ enum skl_power_gate {
#define PORT_TX_DFLEXDPCSSS(fia) _MMIO_FIA((fia), 0x00894)
#define DP_PHY_MODE_STATUS_NOT_SAFE(idx) (1 << (idx))
+#define PORT_TX_DFLEXPA1(fia) _MMIO_FIA((fia), 0x00880)
+#define DP_PIN_ASSIGNMENT_SHIFT(idx) ((idx) * 4)
+#define DP_PIN_ASSIGNMENT_MASK(idx) (0xf << ((idx) * 4))
+#define DP_PIN_ASSIGNMENT(idx, x) ((x) << ((idx) * 4))
+
#endif /* _I915_REG_H_ */
--
2.23.0
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