• Jesse Barnes's avatar
    drm/i915: enable/disable LVDS port at DPMS time · 469d1296
    Jesse Barnes authored
    It would be good to disable the LVDS port when we shut down the panel
    to save power.  We haven't done so until now because we had trouble
    getting the right LVDS parameters from the BIOS.  I think we're past
    that now, so enabling and disabling the port should be safe, though it
    would probably be made cleaner with some additional changes to the
    display code, where we also bang on the LVDS reg to set the pairing
    correctly etc.
    
    Seems to save a bit of power (up to 300mW in my basic wattsup
    meter testing).
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    Signed-off-by: default avatarEric Anholt <eric@anholt.net>
    469d1296
intel_lvds.c 34.2 KB