Looking at gem_workarounds shows us that MMCD_MISC_CTRL is not restored following a suspend-resume cycle. This implies that MMCD_MISC_CTRL is not stored in the context, but is an ordinary register w/a that we need to restore during init_hw. Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_engine_cs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index a28e2a864cf1..06044f1f48c8 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -980,7 +980,11 @@ static int gen9_init_workarounds(struct intel_engine_cs *engine) GEN9_PBE_COMPRESSED_HASH_SELECTION); WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7, GEN9_SAMPLER_HASH_COMPRESSED_READ_ADDR); - WA_SET_BIT(MMCD_MISC_CTRL, MMCD_PCLA | MMCD_HOTSPOT_EN); + + I915_WRITE(MMCD_MISC_CTRL, + I915_READ(MMCD_MISC_CTRL) | + MMCD_PCLA | + MMCD_HOTSPOT_EN); } /* WaClearFlowControlGpgpuContextSave:skl,bxt,kbl,glk,cfl */ -- 2.14.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
