[PATCH 13/19] drm/i915/tc: Unify the way to get the pin assignment on all platforms
Imre Deak
imre.deak at intel.com
Tue Aug 5 07:36:54 UTC 2025
Unify the way to get the pin assignment on all platforms. This removes
the duplication in the helper functions in this and a follow-up change.
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
drivers/gpu/drm/i915/display/intel_tc.c | 47 ++++++++++++++-----------
1 file changed, 27 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index 20d0bc8257860..5b044ece815df 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -277,23 +277,32 @@ static u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port)
return lane_mask >> DP_LANE_ASSIGNMENT_SHIFT(tc->phy_fia_idx);
}
-enum intel_tc_pin_assignment
-intel_tc_port_get_pin_assignment(struct intel_digital_port *dig_port)
+static enum intel_tc_pin_assignment
+get_pin_assignment(struct intel_tc_port *tc)
{
- struct intel_display *display = to_intel_display(dig_port);
- struct intel_tc_port *tc = to_tc_port(dig_port);
+ struct intel_display *display = to_intel_display(tc->dig_port);
+ enum tc_port tc_port = intel_encoder_to_tc(&tc->dig_port->base);
enum intel_tc_pin_assignment pin_assignment;
intel_wakeref_t wakeref;
+ i915_reg_t reg;
+ u32 mask;
u32 val;
+ if (DISPLAY_VER(display) >= 20) {
+ reg = TCSS_DDI_STATUS(tc_port);
+ mask = TCSS_DDI_STATUS_PIN_ASSIGNMENT_MASK;
+ } else {
+ reg = PORT_TX_DFLEXPA1(tc->phy_fia);
+ mask = DP_PIN_ASSIGNMENT_MASK(tc->phy_fia_idx);
+ }
+
with_intel_display_power(display, POWER_DOMAIN_DISPLAY_CORE, wakeref)
- val = intel_de_read(display, PORT_TX_DFLEXPA1(tc->phy_fia));
+ val = intel_de_read(display, reg);
drm_WARN_ON(display->drm, val == 0xffffffff);
assert_tc_cold_blocked(tc);
- pin_assignment = (val & DP_PIN_ASSIGNMENT_MASK(tc->phy_fia_idx)) >>
- DP_PIN_ASSIGNMENT_SHIFT(tc->phy_fia_idx);
+ pin_assignment = (val & mask) >> (ffs(mask) - 1);
switch (pin_assignment) {
case INTEL_TC_PIN_ASSIGNMENT_A:
@@ -315,21 +324,10 @@ intel_tc_port_get_pin_assignment(struct intel_digital_port *dig_port)
static int lnl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port)
{
- struct intel_display *display = to_intel_display(dig_port);
- enum tc_port tc_port = intel_encoder_to_tc(&dig_port->base);
struct intel_tc_port *tc = to_tc_port(dig_port);
enum intel_tc_pin_assignment pin_assignment;
- intel_wakeref_t wakeref;
- u32 val;
- with_intel_display_power(display, POWER_DOMAIN_DISPLAY_CORE, wakeref)
- val = intel_de_read(display, TCSS_DDI_STATUS(tc_port));
-
- drm_WARN_ON(display->drm, val == 0xffffffff);
- assert_tc_cold_blocked(tc);
-
- pin_assignment =
- REG_FIELD_GET(TCSS_DDI_STATUS_PIN_ASSIGNMENT_MASK, val);
+ pin_assignment = get_pin_assignment(tc);
switch (pin_assignment) {
case INTEL_TC_PIN_ASSIGNMENT_NONE:
@@ -347,9 +345,10 @@ static int lnl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port)
static int mtl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port)
{
+ struct intel_tc_port *tc = to_tc_port(dig_port);
enum intel_tc_pin_assignment pin_assignment;
- pin_assignment = intel_tc_port_get_pin_assignment(dig_port);
+ pin_assignment = get_pin_assignment(tc);
switch (pin_assignment) {
case INTEL_TC_PIN_ASSIGNMENT_NONE:
@@ -420,6 +419,14 @@ int intel_tc_port_max_lane_count(struct intel_digital_port *dig_port)
return tc->max_lane_count;
}
+enum intel_tc_pin_assignment
+intel_tc_port_get_pin_assignment(struct intel_digital_port *dig_port)
+{
+ struct intel_tc_port *tc = to_tc_port(dig_port);
+
+ return get_pin_assignment(tc);
+}
+
void intel_tc_port_set_fia_lane_count(struct intel_digital_port *dig_port,
int required_lanes)
{
--
2.49.1
More information about the Intel-xe
mailing list