From: Sasa Dragic sasa.dragic@gmail.com
commit 67b0b4ed259e425b7eed09da75b42c80682ca003 upstream.
RC6p on Sandy Bridge got re-enabled over time, causing visual glitches and GPU hangs.
Disabled originally in commit 1c8ecf80fdee ("drm/i915: do not enable RC6p on Sandy Bridge").
Signed-off-by: Sasa Dragic sasa.dragic@gmail.com Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20221219172927.9603-2-sasa.dra... Fixes: fb6db0f5bf1d ("drm/i915: Remove unsafe i915.enable_rc6") Fixes: 13c5a577b342 ("drm/i915/gt: Select the deepest available parking mode for rc6") Cc: stable@vger.kernel.org Reviewed-by: Rodrigo Vivi rodrigo.vivi@intel.com (cherry picked from commit 0c8a6e9ea232c221976a0670256bd861408d9917) Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/i915_pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -423,7 +423,8 @@ static const struct intel_device_info il .has_coherent_ggtt = true, \ .has_llc = 1, \ .has_rc6 = 1, \ - .has_rc6p = 1, \ + /* snb does support rc6p, but enabling it causes various issues */ \ + .has_rc6p = 0, \ .has_rps = true, \ .dma_mask_size = 40, \ .__runtime.ppgtt_type = INTEL_PPGTT_ALIASING, \