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    • Lee Shawn C's avatar
      drm/i915: keep backlight_enable on until turn eDP display off · cdad3921
      Lee Shawn C authored
      
      
      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: default avatarLee Shawn C <shawn.c.lee@intel.com>
      Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20210624053932.21037-1-shawn.c.lee@intel.com
      cdad3921
    • Dave Airlie's avatar
      Merge tag 'amd-drm-next-5.14-2021-06-22-1' of... · b322a50d
      Dave Airlie authored
      Merge tag 'amd-drm-next-5.14-2021-06-22-1' of https://gitlab.freedesktop.org/agd5f/linux
      
       into drm-next
      
      amd-drm-next-5.14-2021-06-22-1:
      
      amdgpu:
      - Userptr BO fixes
      - RAS fixes
      - Beige Goby fixes
      - Add some missing freesync documentation
      - Aldebaran fixes
      - SR-IOV fixes
      - Potential memory corruption fix in framebuffer handling
      - Revert GFX9, 10 doorbell fixes, we just
        end up trading one bug for another
      - Multi-plane cursor fixes with rotation
      - LTTPR fixes
      - Backlight fixes
      - eDP fix
      - Fold DRM_AMD_DC_DCN3_1 into DRM_AMD_DC_DCN
      - Misc code cleanups
      
      amdkfd:
      - Topology fix
      - Locking fix
      
      radeon:
      - Misc code cleanup
      
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      From: Alex Deucher <alexander.deucher@amd.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20210622210345.27297-1-alexander.deucher@amd.com
      b322a50d