> My docs here say that the SDE_ISR reg contains what we want - high > level irq bit when the hpd line is enabled. I admit, I haven't tested > this ... I'm looking at 2.1.1 in this http://intellinuxgraphics.org/documentation/SNB/IHD_OS_Vol3_Part3.pdf. All it has relating to hotplug in SDEIIR are D, C and B versions of this: "The ISR is an active high level representing the DIgital Port B hotplug line when the Digital Port B hotplug detect input is enabled. The unmasked IIR is set on either a short or long pulse detection status in the Digital Port Hot Plug Control Register." The SHOTPLUG_CTL description in 2.1.6 says DP_B_HPD_Status "reflects the hot plug detect status on the digital port B... When either a long or short pulse is detected, one of these bits will set. These bits are ORed together to go in the main ISR hotplug register bit." Based on this description, and observed behavior, it looks as if these registers only tell you about pulses/interrupt sources, not the line state. Am I missing something? Stuart
