Ville Syrjälä 2e3eb81884 drm/i915: Fix type1 DVI DP dual mode adapter heuristic for modern platforms ...

commit 1977e8eb40 upstream.

Looks like we never updated intel_bios_is_port_dp_dual_mode() when
the VBT port mapping became erratic on modern platforms. This
is causing us to look up the wrong child device and thus throwing
the heuristic off (ie. we might end looking at a child device for
a genuine DP++ port when we were supposed to look at one for a
native HDMI port).

Fix it up by not using the outdated port_mapping[] in
intel_bios_is_port_dp_dual_mode() and rely on
intel_bios_encoder_data_lookup() instead.

Cc: stable@vger.kernel.org
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4138
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025142147.23897-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit 32c2bc89c7)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-11-25 09:49:05 +01:00

81 KiB

Raw Blame History

View Raw