1. 25 6月, 2021 22 次提交
  2. 24 6月, 2021 1 次提交
    • L
      drm/i915: keep backlight_enable on until turn eDP display off · cdad3921
      Lee Shawn C 提交于
      This workaround is specific for a particular panel on Google
      chromebook project. When user space daemon enter idle state.
      It request adjust brightness to 0, turn backlight_enable signal
      off and keep eDP main link active.
      
      On general LCD, this behavior might not be a problem.
      But on this panel, its tcon would expect source to execute
      full eDP power off sequence after drop backlight_enable signal.
      Without eDP power off sequence. Even source try to turn
      backlight_enable signal on and restore proper brightness level.
      This panel is not able to light on again.
      
      This WA ignored the request from user space daemon to disable
      backlight_enable signal and keep it on always. When user space
      request kernel to turn eDP display off, kernel driver still
      can control backlight_enable signal properly. It would not
      impact standard eDP power off sequence.
      
      v2: 1. modify the quirk name and debug messages.
          2. unregister backlight.power callback for specific device.
      v3: 1. modify debug output messages.
          2. use DMI_EXACT_MATCH instead of DMI_MATCH.
      
      Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
      Cc: Imre Deak <imre.deak@intel.com>
      Cc: Jani Nikula <jani.nikula@linux.intel.com>
      Cc: Cooper Chiou <cooper.chiou@intel.com>
      Signed-off-by: NLee Shawn C <shawn.c.lee@intel.com>
      Signed-off-by: NJani Nikula <jani.nikula@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20210624053932.21037-1-shawn.c.lee@intel.com
      cdad3921
  3. 23 6月, 2021 13 次提交
  4. 22 6月, 2021 4 次提交