diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 472939f5c18f..d0ef50bf930a 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1677,9 +1677,26 @@ static int switch_context(struct i915_request *rq) GEM_BUG_ON(HAS_EXECLISTS(rq->i915)); if (ppgtt) { - ret = load_pd_dir(rq, ppgtt); - if (ret) - goto err; + int loops; + + /* + * Baytail takes a little more convincing that it really needs + * to reload the PD between contexts. It is not just a little + * longer, as adding more stalls after the load_pd_dir (i.e. + * adding a long loop around flush_pd_dir) is not as effective + * as reloading the PD umpteen times. 32 is derived from + * experimentation (gem_exec_parallel/fds) and has no good + * explanation. + */ + loops = 1; + if (engine->id == BCS && IS_VALLEYVIEW(engine->i915)) + loops = 32; + + do { + ret = load_pd_dir(rq, ppgtt); + if (ret) + goto err; + } while (--loops); if (intel_engine_flag(engine) & ppgtt->pd_dirty_rings) { unwind_mm = intel_engine_flag(engine); |