diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 7f73f71741ae12487959bfc5feedf6a96bdfff7f..ac68b5bd8f1503a1a90ce5dc319b181148f77740 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -2152,6 +2152,38 @@ static irqreturn_t ironlake_irq_handler(int irq, void *arg) return ret; } +static void bxt_hpd_handler(struct drm_device *dev, uint32_t iir_status) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t hp_control; + uint32_t hp_trigger; + + /* Get the status */ + hp_trigger = iir_status & BXT_DE_PORT_HOTPLUG_MASK; + hp_control = I915_READ(BXT_HOTPLUG_CTL); + + /* Hotplug not enabled ? */ + if (!(hp_control & BXT_HOTPLUG_CTL_MASK)) { + DRM_ERROR("Interrupt when HPD disabled\n"); + return; + } + + DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n", + hp_control & BXT_HOTPLUG_CTL_MASK); + + /* Check for HPD storm and schedule bottom half */ + intel_hpd_irq_handler(dev, hp_trigger, hp_control, hpd_bxt); + + /* + * FIXME: Save the hot plug status for bottom half before + * clearing the sticky status bits, else the status will be + * lost. + */ + + /* Clear sticky bits in hpd status */ + I915_WRITE(BXT_HOTPLUG_CTL, hp_control); +} + static irqreturn_t gen8_irq_handler(int irq, void *arg) { struct drm_device *dev = arg; @@ -2197,12 +2229,22 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg) if (master_ctl & GEN8_DE_PORT_IRQ) { tmp = I915_READ(GEN8_DE_PORT_IIR); if (tmp) { + bool found = false; + I915_WRITE(GEN8_DE_PORT_IIR, tmp); ret = IRQ_HANDLED; - if (tmp & aux_mask) + if (tmp & aux_mask) { dp_aux_irq_handler(dev); - else + found = true; + } + + if (IS_BROXTON(dev) && tmp & BXT_DE_PORT_HOTPLUG_MASK) { + bxt_hpd_handler(dev, tmp); + found = true; + } + + if (!found) DRM_ERROR("Unexpected DE Port interrupt\n"); } else