From: Ville Syrjälä ville.syrjala@linux.intel.com
These backports fix a plane related regression causing a corrupted screen and bunch of WARNs from the kernel on some pre-i965 era hardware.
Cc: stable@vger.kernel.org # 4.14
Ville Syrjälä (3): drm/i915: Add .get_hw_state() method for planes drm/i915: Redo plane sanitation during readout drm/i915: Fix deadlock in i830_disable_pipe()
drivers/gpu/drm/i915/intel_display.c | 303 ++++++++++++++++++----------------- drivers/gpu/drm/i915/intel_drv.h | 2 + drivers/gpu/drm/i915/intel_sprite.c | 83 ++++++++++ 3 files changed, 242 insertions(+), 146 deletions(-)