From: Sasa Dragic <sasa.dragic@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20221219172927.9603-2-sasa.dragic@xxxxxxxxx
Fixes: fb6db0f5bf1d ("drm/i915: Remove unsafe i915.enable_rc6")
Fixes: 13c5a577b342 ("drm/i915/gt: Select the deepest available parking mode for rc6")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
(cherry picked from commit 0c8a6e9ea232c221976a0670256bd861408d9917)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -401,7 +401,8 @@ 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, \
.ppgtt_type = INTEL_PPGTT_ALIASING, \
