diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index c8ba94968aaf..671f76ccd8df 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1824,8 +1824,24 @@ static void ibx_hpd_irq_handler(struct drm_device *dev, u32 hotplug_trigger, struct drm_i915_private *dev_priv = to_i915(dev); u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0; + /* + * Somehow the PCH doesn't seem to really ack the interrupt to the CPU + * unless we touch the hotplug register, even if hotplug_trigger is + * zero. Not acking leads to "The master control interrupt lied (SDE)!" + * errors. + */ dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG); + if (!hotplug_trigger) { + u32 mask = PORTA_HOTPLUG_STATUS_MASK | + PORTD_HOTPLUG_STATUS_MASK | + PORTC_HOTPLUG_STATUS_MASK | + PORTB_HOTPLUG_STATUS_MASK; + dig_hotplug_reg &= ~mask; + } + I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg); + if (!hotplug_trigger) + return; intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger, dig_hotplug_reg, hpd, @@ -1840,8 +1856,7 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir) int pipe; u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK; - if (hotplug_trigger) - ibx_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx); + ibx_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx); if (pch_iir & SDE_AUDIO_POWER_MASK) { int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >> @@ -1934,8 +1949,7 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir) int pipe; u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT; - if (hotplug_trigger) - ibx_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt); + ibx_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt); if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) { int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >> |