From: Tom O'Rourke Date: Wed, 9 Apr 2014 18:44:06 +0000 (-0700) Subject: drm/i915/bdw: Use timeout mode for RC6 on bdw X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0d68b25e9ceb344fe2f93373b1c0311d33814265;p=openwrt%2Fstaging%2Fblogic.git drm/i915/bdw: Use timeout mode for RC6 on bdw Higher RC6 residency is observed using timeout mode instead of EI mode. This applies to Broadwell only. The difference is particularly noticeable with video playback. Signed-off-by: Tom O'Rourke Reviewed-by: Ben Widawsky Signed-off-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 1cce0a590979..cb261457bfd1 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3486,15 +3486,23 @@ static void gen8_enable_rps(struct drm_device *dev) for_each_ring(ring, dev_priv, unused) I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); I915_WRITE(GEN6_RC_SLEEP, 0); - I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */ + if (IS_BROADWELL(dev)) + I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us/1.28 for TO */ + else + I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */ /* 3: Enable RC6 */ if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE) rc6_mask = GEN6_RC_CTL_RC6_ENABLE; intel_print_rc6_info(dev, rc6_mask); - I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE | - GEN6_RC_CTL_EI_MODE(1) | - rc6_mask); + if (IS_BROADWELL(dev)) + I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE | + GEN7_RC_CTL_TO_MODE | + rc6_mask); + else + I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE | + GEN6_RC_CTL_EI_MODE(1) | + rc6_mask); /* 4 Program defaults and thresholds for RPS*/ I915_WRITE(GEN6_RPNSWREQ,