intel_hpd_irq_handler — main hotplug irq handler
void intel_hpd_irq_handler ( | struct drm_device * dev, |
| u32 pin_mask, | |
u32 long_mask); |
devdrm device
pin_maska mask of hpd pins that have triggered the irq
long_maska mask of hpd pins that may be long hpd pulses
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.