[PATCH v4 0/2] Enhance EDID quirks to allow forcing a mode

[Dylan Semler <dylan.semler@gmail.com>]

Changes in this version
 * rename do_force_quirk_modes() -> do_force_quirk_mode()
 * use list_for_each_entry() instead of list_for_each_entry_safe() in
   do_force_quirk_mode()
 * remove num_modes from do_force_quirk_mode(), just return 1 or 0 as
   appropriate
 * remove unused quirks argument from add_force_quirk_modes()
 * fixes to allow cases of forcing multiple modes
 * adjusted comments to adhere closer to style guides

Changes in version 3
 * Uses drm_cvt_mode() instead of drm_gtf_mode() to build modeline
 * Adds bool to specify reduced blanking to edid_quirk_force_mode
 * Removes preferred bit from all other modes

Changes in version 2
 * none

There is at least one monitor that doesn't report its native resolution
in its EDID block.  This enhancement extends the EDID quirk logic to
make monitors like this "just work".

The first patch in this series sets up a new quirk list where monitors'
correct width, height, refresh rate, and reduced blanking parameters are
specified.  When a matching monitor is attached the full mode is
calculated with drm_cvt_mode() and added to the connector.  The
DRM_MODE_TYPE_PREFERRED bit is set on the new mode and unset from all
other modes.

The first patch also defines a new quirk bit: EDID_QUIRK_FORCE_MODE.
This bit needs to be set for the new quirk list described above to be
checked.

The second patch adds the offending monitor to the quirk lists.

Dylan Semler (2):
  drm: Enhance EDID quirks to explicitly set a mode
  drm: Add EDID force quirk for MMT Monitor2Go HD+

 drivers/gpu/drm/drm_edid.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)

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1.7.11.7