]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915/skl: WaIgnoreDDIAStrap is forever, always init DDI A
authorJani Nikula <jani.nikula@intel.com>
Fri, 14 Aug 2015 07:53:17 +0000 (10:53 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 14 Aug 2015 15:50:43 +0000 (17:50 +0200)
commit0a62d79ff6045840ef0474ba230779bc8994939a
tree538fb3e9a38bb7b4043dc6f635d92d9936a09f8a
parenta1c155e1659d84c49f6453429975518e69c969ec
drm/i915/skl: WaIgnoreDDIAStrap is forever, always init DDI A

There is currently conflicting documentation on which steppings the
workaround is needed, up to C vs. forever. However there is post-C
stepping hardware that doesn't report port presence on DDI A, leading to
black screen on eDP. Assume the strap isn't connected, and try to enable
DDI A on these machines. (We'll still check the VBT for the info in DDI
init.)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_display.c