[Intel-gfx] [PATCH v4 0/2] GPD Win Max display fixes

[Anisse Astier]

This patch series is for making the GPD Win Max display usable with
Linux.

The GPD Win Max is a small laptop, and its eDP panel does not send an
EDID over DPCD; the EDID is instead available in the intel opregion, in
mailbox #5 [1]

The second patch is just to fix the orientation of the panel.

Changes since v1:
 - rebased on drm-tip
 - squashed patch 1 & 2
 - picked up Reviewed-by from Hans de Goede (thanks for the review)

Changes since v2:
 - rebased on drm-tip
 - updated commit message

When v2 was initially sent [3] Ville Syrjälä suggested that it might be
a good idea to use the ACPI _DDC method instead to get the EDID, to
cover a wider range of hardware. Unfortunately, it doesn't seem
available on GPD Win Max, so I think this work should be done
independently, and this patch series considered separately.

Change since v3:
 - edits following Jani's review:
    - The EDID from the opregion is now only used as a fallback: if we
      cannot get any edid from the edp connector, then we attempt to get
      it from the opregion. This works for the GPD Win Max.
    - all other remarks should have been taken into account
 - rebased on drm-tip
 - added Co-developed-by
 - reordered signed-off-by and reviewed-by in second patch (thanks
   Maarten!)

[1]: https://gitlab.freedesktop.org/drm/intel/-/issues/3454
[2]: https://patchwork.kernel.org/project/intel-gfx/patch/20200828061941.17051-1-jani.nikula@intel.com/
[3]: https://patchwork.kernel.org/project/intel-gfx/patch/20210531204642.4907-2-anisse@astier.eu/


Anisse Astier (2):
  drm/i915/opregion: add support for mailbox #5 EDID
  drm: Add orientation quirk for GPD Win Max

 .../gpu/drm/drm_panel_orientation_quirks.c    |  6 ++
 drivers/gpu/drm/i915/display/intel_dp.c       |  7 +++
 drivers/gpu/drm/i915/display/intel_opregion.c | 55 ++++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_opregion.h | 10 ++++
 4 files changed, 77 insertions(+), 1 deletion(-)

-- 
2.31.1