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| author | Clinton A Taylor <clinton.a.taylor@intel.com> | 2019-09-26 14:06:56 -0700 |
|---|---|---|
| committer | José Roberto de Souza <jose.souza@intel.com> | 2019-09-27 10:40:17 -0700 |
| commit | 3b51be4e4061bd5e0f1b73f56cfecaa879c76d51 (patch) | |
| tree | d6e24340569d6977ab4000d9eafadd55e293b45a /drivers/gpu/drm/i915/display/intel_tc.c | |
| parent | 283a4095af9dd95e5d6d9f3e7f8b66a4b9f84082 (diff) | |
| download | lwn-3b51be4e4061bd5e0f1b73f56cfecaa879c76d51.tar.gz lwn-3b51be4e4061bd5e0f1b73f56cfecaa879c76d51.zip | |
drm/i915/tc: Update DP_MODE programming
BSpec was updated(r146548) with a new MG_DP_MODE Programming table,
now taking in consideration the pin assignment and allowing us to
optimize power by shutting down available but not needed lanes.
It was tested on ICL and TGL, with adaptors that used pin assignment
C and B, reversing the connector and going to different modes testing
the not needed lane shutdown.
v5:
Using crtc_state->lane_count instead of dp.lane_count
BSpec: 21735
BSpec: 49292
Cc: Imre Deak <imre.deak@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Clinton A Taylor <clinton.a.taylor@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190926210659.56317-1-jose.souza@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_tc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index f923f9cbd33c..7773169b7331 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -67,6 +67,21 @@ u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port) return lane_mask >> 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); |