diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_tc.c')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.c | 66 |
1 files changed, 50 insertions, 16 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index cdf2455440..f64d348a96 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -260,7 +260,7 @@ assert_tc_port_power_enabled(struct intel_tc_port *tc) !intel_display_power_is_enabled(i915, tc_port_power_domain(tc))); } -u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port) +static u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); struct intel_tc_port *tc = to_tc_port(dig_port); @@ -290,7 +290,32 @@ 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) +static int lnl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + enum tc_port tc_port = intel_port_to_tc(i915, dig_port->base.port); + intel_wakeref_t wakeref; + u32 val, pin_assignment; + + with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref) + val = intel_de_read(i915, TCSS_DDI_STATUS(tc_port)); + + pin_assignment = + REG_FIELD_GET(TCSS_DDI_STATUS_PIN_ASSIGNMENT_MASK, val); + + switch (pin_assignment) { + default: + MISSING_CASE(pin_assignment); + fallthrough; + case DP_PIN_ASSIGNMENT_D: + return 2; + case DP_PIN_ASSIGNMENT_C: + case DP_PIN_ASSIGNMENT_E: + return 4; + } +} + +static int mtl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); intel_wakeref_t wakeref; @@ -311,23 +336,12 @@ static int mtl_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_po } } -int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port) +static int intel_tc_port_get_max_lane_count(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); - struct intel_tc_port *tc = to_tc_port(dig_port); - enum phy phy = intel_port_to_phy(i915, dig_port->base.port); intel_wakeref_t wakeref; - u32 lane_mask; - - if (!intel_phy_is_tc(i915, phy) || tc->mode != TC_PORT_DP_ALT) - return 4; - - assert_tc_cold_blocked(tc); - - if (DISPLAY_VER(i915) >= 14) - return mtl_tc_port_get_pin_assignment_mask(dig_port); + u32 lane_mask = 0; - lane_mask = 0; with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref) lane_mask = intel_tc_port_get_lane_mask(dig_port); @@ -348,6 +362,26 @@ int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port) } } +int intel_tc_port_max_lane_count(struct intel_digital_port *dig_port) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + struct intel_tc_port *tc = to_tc_port(dig_port); + enum phy phy = intel_port_to_phy(i915, dig_port->base.port); + + if (!intel_phy_is_tc(i915, phy) || tc->mode != TC_PORT_DP_ALT) + return 4; + + assert_tc_cold_blocked(tc); + + if (DISPLAY_VER(i915) >= 20) + return lnl_tc_port_get_max_lane_count(dig_port); + + if (DISPLAY_VER(i915) >= 14) + return mtl_tc_port_get_max_lane_count(dig_port); + + return intel_tc_port_get_max_lane_count(dig_port); +} + void intel_tc_port_set_fia_lane_count(struct intel_digital_port *dig_port, int required_lanes) { @@ -583,7 +617,7 @@ static bool tc_phy_verify_legacy_or_dp_alt_mode(struct intel_tc_port *tc, struct intel_digital_port *dig_port = tc->dig_port; int max_lanes; - max_lanes = intel_tc_port_fia_max_lane_count(dig_port); + max_lanes = intel_tc_port_max_lane_count(dig_port); if (tc->mode == TC_PORT_LEGACY) { drm_WARN_ON(&i915->drm, max_lanes != 4); return true; |