diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_display_power.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_power.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index 606a1659021b..c4043d665645 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -575,6 +575,28 @@ static void icl_tc_port_assert_ref_held(struct drm_i915_private *dev_priv, #define TGL_AUX_PW_TO_TC_PORT(pw_idx) ((pw_idx) - TGL_PW_CTL_IDX_AUX_TC1) +static void icl_tc_cold_exit(struct drm_i915_private *i915) +{ + int ret, tries = 0; + + while (1) { + ret = sandybridge_pcode_write_timeout(i915, + ICL_PCODE_EXIT_TCCOLD, + 0, 250, 1); + if (ret != -EAGAIN || ++tries == 3) + break; + msleep(1); + } + + /* Spec states that TC cold exit can take up to 1ms to complete */ + if (!ret) + msleep(1); + + /* TODO: turn failure into a error as soon i915 CI updates ICL IFWI */ + drm_dbg_kms(&i915->drm, "TC cold block %s\n", ret ? "failed" : + "succeeded"); +} + static void icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) @@ -593,7 +615,8 @@ icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv, hsw_power_well_enable_prepare(dev_priv, power_well); - /* TODO ICL TC cold handling */ + if (INTEL_GEN(dev_priv) == 11 && dig_port->tc_legacy_port) + icl_tc_cold_exit(dev_priv); hsw_power_well_enable_complete(dev_priv, power_well); |