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    • Ville Syrjälä's avatar
      drm/i915: Don't call intel_get_hpd_pins() when there's no hotplug interrupt · 58f2cf24
      Ville Syrjälä authored
      On GMCH plaforms we are now getting the following spew on aux
      interrupts:
      [drm:intel_get_hpd_pins] hotplug event received, stat 0x00000000, dig 0x00000000, pins 0x00000000
      [drm:intel_get_hpd_pins] hotplug event received, stat 0x00000000, dig 0x00000000, pins 0x00000000
      [drm:intel_get_hpd_pins] hotplug event received, stat 0x00000000, dig 0x00000000, pins 0x00000000
      [drm:intel_get_hpd_pins] hotplug event received, stat 0x00000000, dig 0x00000000, pins 0x00000000
      [drm:intel_get_hpd_pins] hotplug event received, stat 0x00000000, dig 0x00000000, pins 0x00000000
      [drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x71450064
      
      Prevent it by not calling intel_get_hpd_pins() unless one of the HPD
      interrupt bits are actually set.
      
      I already fixed similar annoyance once with
      4bca26d0 drm/i915: Use HOTPLUG_INT_STATUS_G4X on VLV/CHV
      
      but another source for it got added in
      fd63e2a9 drm/i915: combine i9xx_get_hpd_pins and pch_get_hpd_pins
      
      due to pch_get_hpd_pins() being chosen over i9xx_get_hpd_pins() to
      serve as the new unified piece of code. pch_get_hpd_pins() had the debug
      print, and i9xx_get_hpd_pins() didn't.
      
      Cc: Imre Deak <imre.deak@intel.com>
      Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
      Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      58f2cf24