diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_power.c | 95 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.h | 10 |
3 files changed, 98 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index fd13cd68deae..86a38116dc3a 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -17,6 +17,7 @@ #include "intel_drv.h" #include "intel_hotplug.h" #include "intel_sideband.h" +#include "intel_tc.h" bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, enum i915_power_well_id power_well_id); @@ -447,26 +448,106 @@ icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv, #define ICL_TBT_AUX_PW_TO_CH(pw_idx) \ ((pw_idx) - ICL_PW_CTL_IDX_AUX_TBT1 + AUX_CH_C) +static enum aux_ch icl_tc_phy_aux_ch(struct drm_i915_private *dev_priv, + struct i915_power_well *power_well) +{ + int pw_idx = power_well->desc->hsw.idx; + + return power_well->desc->hsw.is_tc_tbt ? ICL_TBT_AUX_PW_TO_CH(pw_idx) : + ICL_AUX_PW_TO_CH(pw_idx); +} + +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM) + +static u64 async_put_domains_mask(struct i915_power_domains *power_domains); + +static int power_well_async_ref_count(struct drm_i915_private *dev_priv, + struct i915_power_well *power_well) +{ + int refs = hweight64(power_well->desc->domains & + async_put_domains_mask(&dev_priv->power_domains)); + + WARN_ON(refs > power_well->count); + + return refs; +} + +static void icl_tc_port_assert_ref_held(struct drm_i915_private *dev_priv, + struct i915_power_well *power_well) +{ + enum aux_ch aux_ch = icl_tc_phy_aux_ch(dev_priv, power_well); + struct intel_digital_port *dig_port = NULL; + struct intel_encoder *encoder; + + /* Bypass the check if all references are released asynchronously */ + if (power_well_async_ref_count(dev_priv, power_well) == + power_well->count) + return; + + aux_ch = icl_tc_phy_aux_ch(dev_priv, power_well); + + for_each_intel_encoder(&dev_priv->drm, encoder) { + if (!intel_port_is_tc(dev_priv, encoder->port)) + continue; + + /* We'll check the MST primary port */ + if (encoder->type == INTEL_OUTPUT_DP_MST) + continue; + + dig_port = enc_to_dig_port(&encoder->base); + if (WARN_ON(!dig_port)) + continue; + + if (dig_port->aux_ch != aux_ch) { + dig_port = NULL; + continue; + } + + break; + } + + if (WARN_ON(!dig_port)) + return; + + WARN_ON(!intel_tc_port_ref_held(dig_port)); +} + +#else + +static void icl_tc_port_assert_ref_held(struct drm_i915_private *dev_priv, + struct i915_power_well *power_well) +{ +} + +#endif + static void icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv, struct i915_power_well *power_well) { - int pw_idx = power_well->desc->hsw.idx; - bool is_tbt = power_well->desc->hsw.is_tc_tbt; - enum aux_ch aux_ch; + enum aux_ch aux_ch = icl_tc_phy_aux_ch(dev_priv, power_well); u32 val; - aux_ch = is_tbt ? ICL_TBT_AUX_PW_TO_CH(pw_idx) : - ICL_AUX_PW_TO_CH(pw_idx); + icl_tc_port_assert_ref_held(dev_priv, power_well); + val = I915_READ(DP_AUX_CH_CTL(aux_ch)); val &= ~DP_AUX_CH_CTL_TBT_IO; - if (is_tbt) + if (power_well->desc->hsw.is_tc_tbt) val |= DP_AUX_CH_CTL_TBT_IO; I915_WRITE(DP_AUX_CH_CTL(aux_ch), val); hsw_power_well_enable(dev_priv, power_well); } +static void +icl_tc_phy_aux_power_well_disable(struct drm_i915_private *dev_priv, + struct i915_power_well *power_well) +{ + icl_tc_port_assert_ref_held(dev_priv, power_well); + + hsw_power_well_disable(dev_priv, power_well); +} + /* * We should only use the power well if we explicitly asked the hardware to * enable it, so check if it's enabled and also check if we've requested it to @@ -3119,7 +3200,7 @@ static const struct i915_power_well_ops icl_combo_phy_aux_power_well_ops = { static const struct i915_power_well_ops icl_tc_phy_aux_power_well_ops = { .sync_hw = hsw_power_well_sync_hw, .enable = icl_tc_phy_aux_power_well_enable, - .disable = hsw_power_well_disable, + .disable = icl_tc_phy_aux_power_well_disable, .is_enabled = hsw_power_well_enabled, }; diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index ba6492bc0ee0..467dd3ec541b 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -319,6 +319,8 @@ static void intel_tc_port_reset_mode(struct intel_digital_port *dig_port, enum tc_port_mode old_tc_mode = dig_port->tc_mode; intel_display_power_flush_work(dev_priv); + WARN_ON(intel_display_power_is_enabled(dev_priv, + intel_aux_power_domain(dig_port))); icl_tc_phy_disconnect(dig_port); icl_tc_phy_connect(dig_port, required_lanes); diff --git a/drivers/gpu/drm/i915/display/intel_tc.h b/drivers/gpu/drm/i915/display/intel_tc.h index 31af7be96070..8adc107cdbcb 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.h +++ b/drivers/gpu/drm/i915/display/intel_tc.h @@ -7,8 +7,8 @@ #define __INTEL_TC_H__ #include <linux/types.h> - -struct intel_digital_port; +#include <linux/mutex.h> +#include "intel_drv.h" void icl_tc_phy_disconnect(struct intel_digital_port *dig_port); @@ -23,6 +23,12 @@ void intel_tc_port_get_link(struct intel_digital_port *dig_port, int required_lanes); void intel_tc_port_put_link(struct intel_digital_port *dig_port); +static inline int intel_tc_port_ref_held(struct intel_digital_port *dig_port) +{ + return mutex_is_locked(&dig_port->tc_lock) || + dig_port->tc_link_refcount; +} + void intel_tc_port_init(struct intel_digital_port *dig_port, bool is_legacy); #endif /* __INTEL_TC_H__ */ |