1. 22 Jun, 2012 1 commit
  2. 20 Jun, 2012 20 commits
  3. 18 Jun, 2012 8 commits
  4. 16 Jun, 2012 1 commit
    • Daniel Vetter's avatar
      drm/i915/crt: Do not rely upon the HPD presence pin · aaa37730
      Daniel Vetter authored
      VGA hotplug detection "works" by measuring the resistance across
      certain pins. A lot of kvm switches fumble this and wire up cheap
      resistors with the wrong resistance or don't bother at all.
      
      To accomodate these, also try to detect a connected monitor by trying
      to grab the edid. Contrary to !HAS_HOTPLUG platforms we don't bother
      with an actual load-detection cycle when the output is life - that
      would be actual work to implement because things moved around. This is
      the big difference to Chris Wilson's original approach:
      
      commit 9e612a00
      Author: Chris Wilson <chris@chris-wilson.co.uk>
      Date:   Thu May 31 13:08:53 2012 +0100
      
          drm/i915/crt: Do not rely upon the HPD presence pin
      
      This blew up on Linus' machine because it errornously detected a vga
      screen (without and edid and hence only the default modes), leading to
      it's prompt removal:
      
      commit 8f53369b
      Author: Linus Torvalds <torvalds@linux-foundation.org>
      Date:   Fri Jun 8 14:53:06 2012 -0700
      
          Revert "drm/i915/crt: Do not rely upon the HPD presence pin"
      
      Some digging around in Bspec shows the reason why load detect doesn't work on
      newer chips - the legacy VGA load detect bit isn't wired up any longer:
      
      Public Snb Bspec, Vol3 Part1, 1.1.1 ST00 Input Status 0, bit4:
      
      "RGB Comparator / Sense. This bit is here for compatibility and will
      always return one. Monitor detection must be done be done through the
      programming of registers in the MMIO space.
      0 = Below threshold
      1 = Above threshold"
      
      v2: Add a comment in the code that load detect on hotplug capable
      machines is broken and pimp the commit message with a quote of Bspec
      to show why.
      Reported-and-tested-by: default avatarMatthieu LAVIE <boiteamadmax@hotmail.com>
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50501Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Signed-Off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      aaa37730
  5. 14 Jun, 2012 10 commits