Name

intel_hpd_irq_handler — main hotplug irq handler

Synopsis

void intel_hpd_irq_handler (struct drm_i915_private * dev_priv,
 u32 pin_mask,
 u32 long_mask);
 

Arguments

dev_priv

drm_i915_private

pin_mask

a mask of hpd pins that have triggered the irq

long_mask

a mask of hpd pins that may be long hpd pulses

Description

This is the main hotplug irq handler for all platforms. The platform specific irq handlers call the platform specific hotplug irq handlers, which read and decode the appropriate registers into bitmasks about hpd pins that have triggered (pin_mask), and which of those pins may be long pulses (long_mask). The long_mask is ignored if the port corresponding to the pin is not a digital port.

Here, we do hotplug irq storm detection and mitigation, and pass further processing to appropriate bottom halves.