drm/i915/bxt: Use correct live status register for BXT platform
BXT platform uses live status bits from 0x44440 register to obtain DP status on hotplug. The existing g4x_digital_port_connected() uses a different register and hence misses DP hotplug events on BXT platform. This patch fixes it by using the appropriate register(0x44440) and live status bits(3:5). Based on a patch by Durgadoss R <durgadoss.r@intel.com>, from whom the commit message is shamelessly copy pasted. Reported-by: NDurgadoss R <durgadoss.r@intel.com> Signed-off-by: NJani Nikula <jani.nikula@intel.com> Reviewed-by: NDurgadoss R <durgadoss.r@intel.com> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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